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2.A.66 The Multidrug/Oligosaccharidyl-lipid/Polysaccharide (MOP) Flippase Superfamily

The MOP flippase superfamily includes eight distantly related families, five for which functional data are available: One ubiquitous family (MATE) specific for drugs, one (PST) specific for polysaccharides and/or their lipid-linked precursors in prokaryotes, one (OLF) specific for lipid-linked oligosaccharide precursors of glycoproteins in eukaryotes, one (AgnG) which includes a single functionally characterized member that extrudes the antibiotic, Agrocin 84, and one (MVI) of unknown transport function. The OLF family is found in the endoplasmic reticular membranes of eukaryotes. All functionally characterized members of the MOP superfamily catalyze efflux of their substrates, presumably by cation antiport. Members of this family have been reported to have the MATE fold (Ferrada and Superti-Furga 2022). MATEs have been described as transporting primary and secondary metabolites, such as terpenoids, phenols, flavonoids, nicotine, alkaloids, phytohormones, proanthocyanidin, and anthocyanins (Saad et al. 2023).


2.A.66.1 The Multi Antimicrobial Extrusion (MATE) Family

The MATE family includes a functionally characterized multidrug efflux system from Vibrio parahaemolyticus NorM, and several homologues from other closely related bacteria that function by a drug:Na+ antiport mechanism, a putative ethionine resistance protein of Saccharomyces cerevisiae, a cationic drug efflux pump in A. thaliana and the functionally uncharacterized DNA damage-inducible protein F (DinF) of E. coli. The bacterial proteins are of about 450 amino acyl residues in length and exhibit 12 putative TMS. They arose by an internal gene duplication event from a primordial 6 TMS encoding genetic element. The yeast proteins are larger (up to about 700 residues) and exhibit about 12 TMSs. A conserved binding site in the N-lobe of prokaryotic MATE transporters suggests a role for Na+ in ion-coupled drug efflux (Castellano et al. 2021).

Human MATE1 (hMATE1) is an electroneutral H+/organic cation (OC) exchanger responsible for the final excretion step of structurally unrelated toxic organic cations in kidney and liver. Glu273, Glu278, Glu300 and Glu389 are conserved in the transmembrane regions. Substitution with alanine or aspartate reduced export of tetraethylammonium (TEA) and cimetidine, and several had altered substrate affinities (Matsumoto et al., 2008). Thus, all of these glutamate residues are involved in binding and/or transport of TEA and cimetidine, but their roles are different.

There are 59 MATE transporters in grapes (Vitis vinifera) (Watanabe et al. 2022). Group 1 may transport toxic compounds and alkaloids; Group 2 may transport polyphenolic compounds; Group 3 may transport organic acids, and Group 4 may transport plant hormones related to signal transduction. In addition to the known anthocyanin transporters, VvMATE37 and VvMATE39, a novel anthocyanin transporter, VvMATE38 in Group 2, was suggested as a key transporter for anthocyanin accumulation in grape berry skin. VvMATE46, VvMATE47, and VvMATE49 in Group 3 may contribute to Al3+ detoxification and Fe2+/Fe3+ translocation via organic acid transport (Watanabe et al. 2022).

The family includes hundreds of functionally uncharacterized but sequenced homologues from bacteria, archaea, and all eukaryotic kingdoms (Kuroda and Tsuchiya, 2009). A comprehensive review of the classes of efflux pump inhibitors from various sources, highlighting their structure-activity relationships, which can be useful for medicinal chemists in the pursuit of novel efflux pump inhibitors has appeared (Durães et al. 2018). A whole-body physiologically based pharmacokinetic study has characterized the interplay of OCTs (TC# 2.A.1.19) and MATEs in intestine, liver and kidney, predicting drug-drug interactions of metformin with perpetrators (Yang et al. 2021).

The probable transport reaction catalyzed by NorM, and possibly by other proteins of the MATE family is:

Antimicrobial (in) + nNa+ (out) → Antimicrobial (out) + nNa+ (in).


2.A.66.2 The Polysaccharide Transport (PST) Family

The protein members of the PST family are generally of 400-500 amino acyl residues in size and traverse the membrane as putative α-helical spanners twelve times. Analyses conducted in 1997 showed that they formed two major clusters. One is concerned with lipopolysaccharide O-antigen (undecaprenol pyrophosphate-linked O-antigen repeat unit) export (flipping from the cytoplasmic side to the periplasmic side of the inner membranes) in Gram-negative bacteria. On the periplasmic side, polymerization occurs catalyzed by Wzy. The other is concerned with exopolysaccharide or capsular polysaccharide export in both Gram-negative and Gram-positive bacteria. However, arachaeal and eukaryotic homologues are now recognized. The mechanism of energy coupling is not established, but homology with the MATE family suggests that they are secondary carriers.  A review of Wzx undecaprenyl pyrophosphate (UndPP)-linked polysaccharide repeat units occurs by a substrate:product antiport mechanism (Islam and Lam 2012). These transporters may function together with auxiliary proteins that allow passage across just the cytoplasmic membrane or both membranes of the Gram-negative bacterial envelope.  They may also regulate transport. Thus, each Gram-negative bacterial PST system specific for an exo- or capsular polysaccharide functions in conjunction with a cytoplasmic membrane-periplasmic auxiliary (MPA) protein with a cytoplasmic ATP-binding domain (MPA1-C; TC #3.C.3) as well as an outer membrane auxiliary protein (OMA; TC #3.C.5). Each Gram-positive bacterial PST system functions in conjunction with a homologous MPA1 + C pair of proteins equivalent to an MPA1-C proteins of Gram-negative bacteria. The C-domain has been shown to possess tyrosine protein kinase activity, so it may function in a regulatory capacity. The lipopolysaccharide exporters may function specifically in the translocation of the lipid-linked O-antigen side chain precursor from the inner leaflet of the cytoplasmic membrane to the outer leaflet (Islam and Lam 2012). In this respect they correlate in function with the members of the oligosaccharidyl-lipid flippase (OLF) family of the MOP flippase superfamily.

The generalized transport reaction catalyzed by PST family proteins is:

Polysaccharide (in) + energy → Polysaccharide (out).


2.A.66.3 The Oligosaccharidyl-lipid Flippase (OLF) Family

N-linked glycosylation in eukaryotic cells follows a conserved pathway in which a tetradecasaccharide substrate (Glc3Man9GlcNAc2) is initially assembled in the ER membrane as a dolichylpyrophosphate (Dol-PP)-linked intermediate before being transferred to an asparaginyl residue in a lumenal protein. An intermediate, Man5GlcNAc2-PP-Dol is made on the cytoplasmic side of the membrane and translocated across the membrane so that the oligosaccharide chain faces the ER lumen where biosynthesis continues to completion.

The flippase that catalyzes the translocation step is dependent on the Rft1 protein of S. cerevisiae (Helenius et al., 2002). Homologues are found in plants, animals and fungi including C. elegans, D. melanogaster, H. sapiens, A. thaliana, S. cerevisiae and S. pombe. The yeast protein, called the nuclear division Rft1 protein, is 574 aas with 12 putative TMSs. The homologue in A. thaliana is 401 aas in length with 8 or 9 putative TMSs while that in C. elegans is 522 aas long with 11 putative TMSs. These proteins are distantly related to MATE and PST family members and therefore are probably secondary carriers.


2.A.66.4 The Mouse Virulence Factor (MVF) Family

A single member of the MVF family, MviN of Salmonella typhimurium, has been shown to be an important virulence factor for this organism when infecting the mouse (Kutsukake et al., 1994). In several bacteria, mviN genes occur in operons including glnD genes that encode the uridylyl transferase that participates in the regulation of nitrogen metabolism (Rudnick et al., 2001). Nothing more is known about the function of this protein or any other member of the MVF family. However, these proteins are related to members of the PST and MATE families (>9 S.D.), and the greatest sequence similarity is found with members of the PST family. It is therefore possible that MVF family members are functionally related to PST family members and catalyze efflux by a cation antiport mechanism.


2.A.66.5 The Agrocin 84 Antibiotic Exporter (AgnG) Family

Agrocin 84 is a disubstituted adenine nucleotide antibiotic made by and specific for Agrobacteria. It is encoded by the pAgK84 plasmid of A. tumefaciens (Kim et al., 2006) and targets a tRNA synthetase (Reader et al., 2005). The agnG gene encodes a protein of 496 aas with 12-13 putative TMSs and a short hydrophilic N-terminal domain of 80 residues. AgnG is distantly related to members of the Mop superfamily, but is so distant, that it does not retrieve any such members in a TC BLAST search. Nevertheless, an NCBI BLAST search retrieves proteins of the PST and MVI families without iterations. agnG null mutants accumulate agrocin 84 intracellularly and do not export it (Kim et al., 2006).

The reaction catalyzed by AgnG is:

agrocin (in) agrocin (out)


2.A.66.6 The Putative Exopolysaccharide Exporter (EPS-E) Family


2.A.66.7 Putative O-Unit Flippase (OUF) Family


2.A.66.8 Unknown MOP-1 (U-MOP1) Family


2.A.66.9 The Progressive Ankylosis (Ank) Family

Craniometaphyseal dysplasia (CMD) is a bone dysplasia characterized by overgrowth and sclerosis of the craniofacial bones and abnormal modeling of the metaphyses of the tubular bones. Hyperostosis and sclerosis of the skull may lead to cranial nerve compressions resulting in hearing loss and facial palsy. An autosomal dominant form of the disorder has been linked to chromosome 5p15.2-p14.1 within a region harboring the human homolog (ANKH) of the mouse progressive ankylosis (ank) gene. The ANK protein spans the cell membrane and shuttles inorganic pyrophosphate (PPi), a major inhibitor of physiologic and pathologic calcification, bone mineralization and bone resorption (Nurnberg et al., 2001).

The ANK protein has 12 membrane-spanning helices with a central channel permitting the passage of PPi. Mutations occur at highly conserved amino acid residues presumed to be located in the cytosolic portion of the protein. The PPi channel ANK is concerned with bone formation and remodeling (Nurnberg et al., 2001).


2.A.66.10 LPS Precursor Flippase (LPS-F) Family


2.A.66.11 Uncharacterized MOP-11 (U-MOP11) Family


2.A.66.12 Uncharacterized MOP-12 (U-MOP12) Family


References associated with 2.A.66 family:

AlQumaizi, K.I., S. Kumar, R. Anwer, and S. Mustafa. (2022). Differential Gene Expression of Efflux Pumps and Porins in Clinical Isolates of MDR. Life (Basel) 12:. 35330171
Bianco, M.I., M. Jacobs, S.R. Salinas, A.G. Salvay, M.V. Ielmini, and L. Ielpi. (2014). Biophysical characterization of the outer membrane polysaccharide export protein and the polysaccharide co-polymerase protein from Xanthomonas campestris. Protein Expr Purif 101: 42-53. 24927643
Brown, D.G., J.K. Swanson, and C. Allen. (2007). Two host-induced Ralstonia solanacearum genes, acrA and dinF, encode multidrug efflux pumps and contribute to bacterial wilt virulence. Appl. Environ. Microbiol. 73: 2777-2786. 17337552
Brown, M.H., I.T. Paulsen, and R.A. Skurray. (1999). The multidrug efflux protein NorM is a prototype of a new family of transporters. Mol. Microbiol. 31: 394-395. 9987140
Butler EK., Davis RM., Bari V., Nicholson PA. and Ruiz N. (2013). Structure-function analysis of MurJ reveals a solvent-exposed cavity containing residues essential for peptidoglycan biogenesis in Escherichia coli. J Bacteriol. 195(20):4639-49. 23935042
Cao, X., Q. Wang, Q. Liu, H. Liu, H. He, and Y. Zhang. (2010). Vibrio alginolyticus MviN is a LuxO-regulated protein and affects cytotoxicity toward EPC cell. J Microbiol Biotechnol 20: 271-280. 20208429
Carr, G., S.H. Moochhala, L. Eley, A. Vandewalle, N.L. Simmons, and J.A. Sayer. (2009). The pyrophosphate transporter ANKH is expressed in kidney and bone cells and colocalises to the primary cilium/basal body complex. Cell Physiol Biochem 24: 595-604. 19910700
Castellano, S., D.P. Claxton, E. Ficici, T. Kusakizako, R. Stix, W. Zhou, O. Nureki, H.S. Mchaourab, and J.D. Faraldo-Gómez. (2021). Conserved binding site in the N-lobe of prokaryotic MATE transporters suggests a role for Na in ion-coupled drug efflux. J. Biol. Chem. [Epub: Ahead of Print] 33402425
Chauhan, N., L. Farine, K. Pandey, A.K. Menon, and P. Bütikofer. (2016). Lipid topogenesis - 35years on. Biochim. Biophys. Acta. [Epub: Ahead of Print] 26946259
Chen, J., Y. Morita, M.N. Huda, T. Kuroda, T. Mizushima, and T. Tsuchiya. (2002). VmrA, a member of a novel class of Na+-coupled multidrug efflux pumps from Vibrio parahaemolyticus. J. Bacteriol. 184: 572-576. 11751837
Chen, L., Y. Liu, H. Liu, L. Kang, J. Geng, Y. Gai, Y. Ding, H. Sun, and Y. Li. (2015). Identification and Expression Analysis of MATE Genes Involved in Flavonoid Transport in Blueberry Plants. PLoS One 10: e0118578. 25781331
Claxton, D.P., K.L. Jagessar, P.R. Steed, R.A. Stein, and H.S. Mchaourab. (2018). Sodium and proton coupling in the conformational cycle of a MATE antiporter from. Proc. Natl. Acad. Sci. USA 115: E6182-E6190. 29915043
Collins, R.F., V. Kargas, B.R. Clarke, C.A. Siebert, D.K. Clare, P.J. Bond, C. Whitfield, and R.C. Ford. (2017). Full-length, Oligomeric Structure of Wzz Determined by Cryoelectron Microscopy Reveals Insights into Membrane-Bound States. Structure 25: 806-815.e3. 28434914
Cunneen, M.M. and P.R. Reeves. (2008). Membrane topology of the Salmonella enterica serovar Typhimurium Group B O-antigen translocase Wzx. FEMS Microbiol. Lett. 287: 76-84. 18707624
Damjanovic, M., A.S. Kharat, A. Eberhardt, A. Tomasz, and W. Vollmer. (2007). The essential tacF gene is responsible for the choline-dependent growth phenotype of Streptococcus pneumoniae. J. Bacteriol. 189: 7105-7111. 17660291
Debeaujon, I., A.J. Peeters, K.M. Léon-Kloosterziel, and M. Koornneef. (2001). The TRANSPARENT TESTA12 gene of Arabidopsis encodes a multidrug secondary transporter-like protein required for flavonoid sequestration in vacuoles of the seed coat endothelium. Plant Cell 13: 853-871. 11283341
Diener, A.C., R.A. Gaxiola, and G.R. Fink. (2001). Arabidopsis ALF5, a multidrug efflux transporter gene family member, confers resistance to toxins. The Plant Cell 13: 1625-1637. 11449055
Dridi, L., J. Tankovic, and J.C. Petit. (2004). CdeA of Clostridium difficile, a new multidrug efflux transporter of the MATE family. Microb Drug Resist 10: 191-196. 15383161
Durães, F., M. Pinto, and E. Sousa. (2018). Medicinal Chemistry Updates on Bacterial Efflux Pump Modulators. Curr. Med. Chem. 25: 6030-6069. 29424299
Durrett, T.P., W. Gassmann, and E.E. Rogers. (2007). The FRD3-mediated efflux of citrate into the root vasculature is necessary for efficient iron translocation. Plant Physiol. 144: 197-205. 17351051
Eijkelkamp, B.A., K.A. Hassan, I.T. Paulsen, and M.H. Brown. (2011). Development of a high-throughput cloning strategy for characterization of Acinetobacter baumannii drug transporter proteins. J. Mol. Microbiol. Biotechnol. 20: 211-219. 21778766
Fay, A. and J. Dworkin. (2009). Bacillus subtilis homologs of MviN (MurJ), the putative Escherichia coli lipid II flippase, are not essential for growth. J. Bacteriol. 191: 6020-6028. 19666716
Fehlner-Gardiner, C.C. and M.A. Valvano. (2002). Cloning and characterization of the Burkholderia vietnamiensis norM gene encoding a multi-drug efflux protein. FEMS Microbiol. Lett. 215: 279-283. 12399047
Ferrada, E. and G. Superti-Furga. (2022). A structure and evolutionary-based classification of solute carriers. iScience 25: 105096. 36164651
Ficici, E., W. Zhou, S. Castellano, and J.D. Faraldo-Gómez. (2018). Broadly conserved Na-binding site in the N-lobe of prokaryotic multidrug MATE transporters. Proc. Natl. Acad. Sci. USA 115: E6172-E6181. 29915058
Franklin, K., E.J. Lingohr, C. Yoshida, M. Anjum, L. Bodrossy, C.G. Clark, A.M. Kropinski, and M.A. Karmali. (2011). Rapid genoserotyping tool for classification of Salmonella serovars. J Clin Microbiol 49: 2954-2965. 21697324
Fu, Y., S. Zhao, N. Ma, Y. Zhang, and S. Cai. (2024). Exploring the Transmembrane Behaviors of Dietary Flavonoids under Intestinal Digestive Products of Different Lipids: Insights into the Structure-Activity Relationship. J Agric Food Chem 72: 794-809. 38131329
Gao JS., Wu N., Shen ZL., Lv K., Qian SH., Guo N., Sun X., Cai YP. and Lin Y. (2016). Molecular cloning, expression analysis and subcellular localization of a Transparent Testa 12 ortholog in brown cotton (Gossypium hirsutum L.). Gene. 576(2 Pt 2):763-9. 26548815
Garcia-Oliveira, A.L., C. Benito, H. Guedes-Pinto, and P. Martins-Lopes. (2018). Molecular cloning of TaMATE2 homoeologues potentially related to aluminium tolerance in bread wheat (Triticum aestivum L.). Plant Biol (Stuttg). [Epub: Ahead of Print] 29908003
Garcia-Oliveira, A.L., P. Martins-Lopes, R. Tolrá, C. Poschenrieder, M. Tarquis, H. Guedes-Pinto, and C. Benito. (2014). Molecular characterization of the citrate transporter gene TaMATE1 and expression analysis of upstream genes involved in organic acid transport under Al stress in bread wheat (Triticum aestivum). Physiol Plant 152: 441-452. 24588850
Gee, C.L., K.G. Papavinasasundaram, S.R. Blair, C.E. Baer, A.M. Falick, D.S. King, J.E. Griffin, H. Venghatakrishnan, A. Zukauskas, J.R. Wei, R.K. Dhiman, D.C. Crick, E.J. Rubin, C.M. Sassetti, and T. Alber. (2012). A phosphorylated pseudokinase complex controls cell wall synthesis in mycobacteria. Sci Signal 5: ra7. 22275220
Green, L.S. and E.E. Rogers. (2004). FRD3 controls iron localization in Arabidopsis. Plant Physiol. 136: 2523-2531. 15310833
Haeuptle, M.A., F.M. Pujol, C. Neupert, B. Winchester, A.J. Kastaniotis, M. Aebi, and T. Hennet. (2008). Human RFT1 deficiency leads to a disorder of N-linked glycosylation. Am J Hum Genet 82: 600-606. 18313027
Hashimoto, K., W. Ogawa, T. Nishioka, T. Tsuchiya, and T. Kuroda. (2013). Functionally cloned pdrM from Streptococcus pneumoniae encodes a Na+ coupled multidrug efflux pump. PLoS One 8: e59525. 23555691
Hayashi, M., K. Tabata, M. Yagasaki, and Y. Yonetani. (2010). Effect of multidrug-efflux transporter genes on dipeptide resistance and overproduction in Escherichia coli. FEMS Microbiol. Lett. 304: 12-19. 20067529
He, G.X., T. Kuroda, T. Mima, Y. Morita, T. Mizushima, and T. Tsuchiya. (2004). An H+-coupled multidrug efflux pump, PmpM, a member of the MATE family of transporters, from Pseudomonas aeruginosa. J. Bacteriol. 186: 262-265. 14679249
He, X., P. Szewczyk, A. Karyakin, M. Evin, W.X. Hong, Q. Zhang, and G. Chang. (2010). Structure of a cation-bound multidrug and toxic compound extrusion transporter. Nature 467: 991-994. 20861838
Helenius, J., D.T.W. Ng, C.L. Marolda, P. Walter, M.A. Valvano, and M. Aebi. (2002). Translocation of lipid-linked oligosaccharides across the ER membrane requires Rft1 protein. Nature 415: 447. 11807558
Hiasa, M., T. Matsumoto, T. Komatsu, H. Omote, and Y. Moriyama. (2007). Functional characterization of testis-specific rodent multidrug and toxic compound extrusion 2, a class III MATE-type polyspecific H+/organic cation exporter. Am. J. Physiol. Cell Physiol. 293: C1437-1444. 17715386
Hirata, E., K.T. Sakata, G.I. Dearden, F. Noor, I. Menon, G.N. Chiduza, and A.K. Menon. (2024). Molecular characterization of Rft1, an ER membrane protein associated with congenital disorder of glycosylation RFT1-CDG. J. Biol. Chem. 107584. [Epub: Ahead of Print] 39025454
Hong, Y., D. Hu, A.D. Verderosa, J. Qin, M. Totsika, and P.R. Reeves. (2023). Repeat-Unit Elongations To Produce Bacterial Complex Long Polysaccharide Chains, an O-Antigen Perspective. EcoSal Plus eesp00202022. [Epub: Ahead of Print] 36622162
Hong, Y., M.M. Cunneen, and P.R. Reeves. (2012). The Wzx translocases for Salmonella enterica O-antigen processing have unexpected serotype specificity. Mol. Microbiol. 84: 620-630. 22497246
Huang, J. and M. Schell. (1995). Molecular characterization of the eps gene cluster of Pseudomonas solanacearum and its transcriptional regulation at a single promoter. Mol. Microbiol. 16: 977-989. 7476194
Huda, M.N., Y. Morita, T. Kurodo, T. Mizushima, and T. Tsuchiya. (2001). Na+-driven multidrug efflux pump VcmA from Vibrio cholera non-01, a non-halophidic bacterium. FEMS Microbiol. Lett. 203: 235-239. 11583854
Hug, L.A., B.J. Baker, K. Anantharaman, C.T. Brown, A.J. Probst, C.J. Castelle, C.N. Butterfield, A.W. Hernsdorf, Y. Amano, K. Ise, Y. Suzuki, N. Dudek, D.A. Relman, K.M. Finstad, R. Amundson, B.C. Thomas, and J.F. Banfield. (2016). A new view of the tree of life. Nat Microbiol 1: 16048. 27572647
Hvorup, R.N., B. Winnen, A. Chang, Y. Jiang, X.-F. Zhou, and M.H. Saier, Jr. (2002). The multidrug/oligosaccharidyl-lipid/polysaccharide (MOP) flippase superfamily. European J. Biochem. 148: 3760-3762. 12603313
Inoue, A., Y. Murata, H. Takahashi, N. Tsuji, S. Fujisaki, and J. Kato. (2008). Involvement of an essential gene, mviN, in murein synthesis in Escherichia coli. J. Bacteriol. 190: 7298-7301. 18708495
Islam ST. and Lam JS. (2013). Wzx flippase-mediated membrane translocation of sugar polymer precursors in bacteria. Environ Microbiol. 15(4):1001-15. 23016929
Jin, Y., A. Nair, and H.W. van Veen. (2014). Multidrug transport protein norM from vibrio cholerae simultaneously couples to sodium- and proton-motive force. J. Biol. Chem. 289: 14624-14632. 24711447
Kaatz, G.W., C.E. DeMarco, and S.M. Seo. (2006). MepR, a repressor of the Staphylococcus aureus MATE family multidrug efflux pump MepA, is a substrate-responsive regulatory protein. Antimicrob. Agents Chemother. 50: 1276-1281. 16569840
Kanai, M., T. Kawata, Y. Yoshida, Y. Kita, T. Ogawa, M. Mizunuma, D. Watanabe, H. Shimoi, A. Mizuno, O. Yamada, T. Fujii, and H. Iefuji. (2017). Sake yeast YHR032W/ERC1 haplotype contributes to high S-adenosylmethionine accumulation in sake yeast strains. J Biosci Bioeng 123: 8-14. 27567046
Kobara, A., M. Hiasa, T. Matsumoto, M. Otsuka, H. Omote, and Y. Moriyama. (2008). A novel variant of mouse MATE-1 H+/organic cation antiporter with a long hydrophobic tail. Arch Biochem Biophys 469: 195-199. 17983590
Kohga, H., T. Mori, Y. Tanaka, K. Yoshikaie, K. Taniguchi, K. Fujimoto, L. Fritz, T. Schneider, and T. Tsukazaki. (2022). Crystal structure of the lipid flippase MurJ in a "squeezed" form distinct from its inward- and outward-facing forms. Structure. [Epub: Ahead of Print] 35660157
Kuk, A.C., E.H. Mashalidis, and S.Y. Lee. (2016). Crystal structure of the MOP flippase MurJ in an inward-facing conformation. Nat Struct Mol Biol. [Epub: Ahead of Print] 28024149
Kumar, S., F.A. Rubino, A.G. Mendoza, and N. Ruiz. (2019). The bacterial lipid II flippase MurJ functions by an alternating-access mechanism. J. Biol. Chem. 294: 981-990. 30482840
Kuroda, T. and T. Tsuchiya. (2009). Multidrug efflux transporters in the MATE family. Biochim. Biophys. Acta. 1794: 763-768. 19100867
Kutsukake, K., T. Okada, T. Yokoseki, and T. Iino. (1994). Sequence analysis of the flgA gene and its adjacent region in Salmonella typhimurium, and identification of another flagellar gene, flgN. Gene 143: 49-54. 8200538
Lefaucheur, L., J. Le Dividich, J. Mourot, G. Monin, P. Ecolan, and D. Krauss. (1991). Influence of environmental temperature on growth, muscle and adipose tissue metabolism, and meat quality in swine. J Anim Sci 69: 2844-2854. 1832143
Li, L., Z. He, G.K. Pandey, T. Tsuchiya, and S. Luan. (2002). Functional cloning and characterization of a plant efflux carrier for multidrug and heavy metal detoxification. J. Biol. Chem. 277: 5360-5368. 11739388
Li, Y., H. He, and L.F. He. (2018). Genome-wide analysis of the MATE gene family in potato. Mol Biol Rep. [Epub: Ahead of Print] 30446960
Liu, Y., X. Wu, C. Sun, W. Chen, M. Zhang, N. Liu, Q. Zhang, L. Xu, and Z. Luo. (2023). Preferential transport activity of DkDTX5/MATE5 affects the formation of different astringency in persimmon. J Integr Plant Biol. [Epub: Ahead of Print] 37526209
Long, F., C. Rouquette-Loughlin, W.M. Shafer, and E.W. Yu. (2008). Functional cloning and characterization of the multidrug efflux pumps NorM from Neisseria gonorrhoeae and YdhE from Escherichia coli. Antimicrob. Agents Chemother. 52: 3052-3060. 18591276
Lu, M., J. Symersky, M. Radchenko, A. Koide, Y. Guo, R. Nie, and S. Koide. (2013). Structures of a Na+-coupled, substrate-bound MATE multidrug transporter. Proc. Natl. Acad. Sci. USA 110: 2099-2104. 23341609
Lu, M., M. Radchenko, J. Symersky, R. Nie, and Y. Guo. (2013). Structural insights into H+-coupled multidrug extrusion by a MATE transporter. Nat Struct Mol Biol 20: 1310-1317. 24141706
Ma, Y., D. Li, Y. Zhong, X. Wang, L. Li, A. Osbourn, W.J. Lucas, S. Huang, and Y. Shang. (2023). Vacuolar MATE/DTX protein-mediated cucurbitacin C transport is co-regulated with bitterness biosynthesis in cucumber. New Phytol. [Epub: Ahead of Print] 36732026
Marinova, K., L. Pourcel, B. Weder, M. Schwarz, D. Barron, J.M. Routaboul, I. Debeaujon, and M. Klein. (2007). The Arabidopsis MATE transporter TT12 acts as a vacuolar flavonoid/H+ -antiporter active in proanthocyanidin-accumulating cells of the seed coat. Plant Cell 19: 2023-2038. 17601828
Marolda, C.L., B. Li, M. Lung, M. Yang, A. Hanuszkiewicz, A.R. Rosales, and M.A. Valvano. (2010). Membrane topology and identification of critical amino acid residues in the Wzx O-antigen translocase from Escherichia coli O157:H4. J. Bacteriol. 192: 6160-6171. 20870764
Marolda, C.L., L.D. Tatar, C. Alaimo, M. Aebi, and M.A. Valvano. (2006). Interplay of the Wzx translocase and the corresponding polymerase and chain length regulator proteins in the translocation and periplasmic assembly of lipopolysaccharide o antigen. J. Bacteriol. 188: 5124-5135. 16816184
Maron, L.G., C.T. Guimarães, M. Kirst, P.S. Albert, J.A. Birchler, P.J. Bradbury, E.S. Buckler, A.E. Coluccio, T.V. Danilova, D. Kudrna, J.V. Magalhaes, M.A. Piñeros, M.C. Schatz, R.A. Wing, and L.V. Kochian. (2013). Aluminum tolerance in maize is associated with higher MATE1 gene copy number. Proc. Natl. Acad. Sci. USA 110: 5241-5246. 23479633
Matsumoto, T., T. Kanamoto, M. Otsuka, H. Omote, and Y. Moriyama. (2008). Role of glutamate residues in substrate recognition by human MATE1 polyspecific H+/organic cation exporter. Am. J. Physiol. Cell Physiol. 294: C1074-1078. 18305230
McAleese, F., P. Petersen, A. Ruzin, P.M. Dunman, E. Murphy, S.J. Projan, and P.A. Bradford. (2005). A novel MATE family efflux pump contributes to the reduced susceptibility of laboratory-derived Staphylococcus aureus mutants to tigecycline. Antimicrob. Agents Chemother. 49: 1865-1871. 15855508
McAnulty, M.J. and T.K. Wood. (2014). YeeO from Escherichia coli exports flavins. Bioengineered 5: 386-392. 25482085
Mitton-Fitzgerald, E., C.M. Gohr, B. Bettendorf, and A.K. Rosenthal. (2016). The Role of ANK in Calcium Pyrophosphate Deposition Disease. Curr Rheumatol Rep 18: 25. 27032788
Miyauchi, H., S. Moriyama, T. Kusakizako, K. Kumazaki, T. Nakane, K. Yamashita, K. Hirata, N. Dohmae, T. Nishizawa, K. Ito, T. Miyaji, Y. Moriyama, R. Ishitani, and O. Nureki. (2017). Structural basis for xenobiotic extrusion by eukaryotic MATE transporter. Nat Commun 8: 1633. 29158478
Mohamed, Y.F. and M.A. Valvano. (2014). A Burkholderia cenocepacia MurJ (MviN) homolog is essential for cell wall peptidoglycan synthesis and bacterial viability. Glycobiology 24: 564-576. 24688094
Morita, M., N. Shitan, K. Sawada, M.C. Van Montagu, D. Inzé, H. Rischer, A. Goossens, K.M. Oksman-Caldentey, Y. Moriyama, and K. Yazaki. (2009). Vacuolar transport of nicotine is mediated by a multidrug and toxic compound extrusion (MATE) transporter in Nicotiana tabacum. Proc. Natl. Acad. Sci. USA 106: 2447-2452. 19168636
Morita, Y., A. Kataoka, S. Shiota, T. Mizushima, and T. Tsuchiya. (2000). NorM of Vibrio parahaemolyticus is a Na+-driven multidrug efflux pump. J. Bacteriol. 182: 6694-6697. 11073914
Morita, Y., K. Kodama, S. Shiota, T. Mine, A. Kataoka, T. Mizushima, and T. Tsuchiya. (1998). NorM, a putative multidrug efflux protein, of Vibrio parahaemolyticus and its homolog in Escherichia coli. Antimicrob. Agents Chemother. 42: 1778-1782. 9661020
Mousa, J.J., Y. Yang, S. Tomkovich, A. Shima, R.C. Newsome, P. Tripathi, E. Oswald, S.D. Bruner, and C. Jobin. (2016). MATE transport of the E. coli-derived genotoxin colibactin. Nat Microbiol 1: 15009. 27571755
Müller, F., J. König, H. Glaeser, I. Schmidt, O. Zolk, M.F. Fromm, and R. Maas. (2011). Molecular mechanism of renal tubular secretion of the antimalarial drug chloroquine. Antimicrob. Agents Chemother. 55: 3091-3098. 21518836
Nigam, S.K. (2015). What do drug transporters really do? Nat Rev Drug Discov 14: 29-44. 25475361
Nishino, K. and A. Yamaguchi. (2001). Analysis of a complete library of putative drug transporter genes in Escherichia coli. J. Bacteriol. 183: 5803-5812. 11566977
Nürnberg, P., H. Thiele, D. Chandler, W. Höhne, M.L. Cunningham, H. Ritter, G. Leschik, K. Uhlmann, C. Mischung, K. Harrop, J. Goldblatt, Z.U. Borochowitz, D. Kotzot, F. Westermann, S. Mundlos, H.S. Braun, N. Laing, and S. Tinschert. (2001). Heterozygous mutations in ANKH, the human ortholog of the mouse progressive ankylosis gene, result in craniometaphyseal dysplasia. Nat. Genet. 28: 37-41. 11326272
Ohta, K.Y., K. Inoue, Y. Hayashi, and H. Yuasa. (2006). Molecular identification and functional characterization of rat multidrug and toxin extrusion type transporter 1 as an organic cation/H+ antiporter in the kidney. Drug Metab Dispos 34: 1868-1874. 16928787
Ongley, S.E., J.J. Pengelly, and B.A. Neilan. (2016). Elevated Na+ and pH influence the production and transport of saxitoxin in the cyanobacteria Anabaena circinalis AWQC131C and Cylindrospermopsis raciborskii T3. Environ Microbiol 18: 427-438. 26347118
Ormazabal, V., F.A. Zuñiga, E. Escobar, C. Aylwin, A. Salas-Burgos, A. Godoy, A.M. Reyes, J.C. Vera, and C.I. Rivas. (2010). Histidine residues in the Na+-coupled ascorbic acid transporter-2 (SVCT2) are central regulators of SVCT2 function, modulating pH sensitivity, transporter kinetics, Na+ cooperativity, conformational stability, and subcellular localization. J. Biol. Chem. 285: 36471-36485. 20843809
Otsuka, M., M. Yasuda, Y. Morita, C. Otsuka, T. Tsuchiya, H. Omote, and Y. Moriyama. (2005). Identification of essential amino acid residues of the NorM Na+/multidrug antiporter in Vibrio parahaemolyticus. J. Bacteriol. 187: 1552-1558. 15716425
Paulsen, I.T., A.M. Beness, and M.H. Saier, Jr. (1997). Computer-based analyses of the protein constituents of transport systems catalyzing export of complex carbohydrates in bacteria. Microbiology 143: 2685-2699. 9274022
Pérez-Burgos, M., I. García-Romero, J. Jung, E. Schander, M.A. Valvano, and L. Søgaard-Andersen. (2020). Characterization of the Exopolysaccharide Biosynthesis Pathway in Myxococcus xanthus. J. Bacteriol. 202:. 32778557
Radchenko, M., J. Symersky, R. Nie, and M. Lu. (2015). Structural basis for the blockade of MATE multidrug efflux pumps. Nat Commun 6: 7995. 26246409
Rekhter, D., D. Lüdke, Y. Ding, K. Feussner, K. Zienkiewicz, V. Lipka, M. Wiermer, Y. Zhang, and I. Feussner. (2019). Isochorismate-derived biosynthesis of the plant stress hormone salicylic acid. Science 365: 498-502. 31371615
Rodríguez-Beltrán, J., A. Rodríguez-Rojas, J.R. Guelfo, A. Couce, and J. Blázquez. (2012). The Escherichia coli SOS gene dinF protects against oxidative stress and bile salts. PLoS One 7: e34791. 22523558
Roschzttardtz, H., M. Séguéla-Arnaud, J.F. Briat, G. Vert, and C. Curie. (2011). The FRD3 citrate effluxer promotes iron nutrition between symplastically disconnected tissues throughout Arabidopsis development. Plant Cell 23: 2725-2737. 21742986
Rouquette-Loughlin, C., S.A. Dunham, M. Kuhn, J.T. Balthazar, and W.M. Shafer. (2003). The NorM efflux pump of Neisseria gonorrhoeae and Neisseria meningitidis recognizes antimicrobial cationic compounds. J. Bacteriol. 185: 1101-1106. 12533487
Rudnick, P.A., T. Arcondéguy, C.K. Kennedy, and D. Kahn. (2001). glnD and mviN are genes of an essential operon in Sinorhizobium meliloti. J. Bacteriol. 183: 2682-2685. 11274131
Ruiz, N. (2008). Bioinformatics identification of MurJ (MviN) as the peptidoglycan lipid II flippase in Escherichia coli. Proc. Natl. Acad. Sci. USA 105: 15553-15557. 18832143
Saad, K.R., G. Kumar, B. Puthusseri, S.M. Srinivasa, P. Giridhar, and N.P. Shetty. (2023). Genome-wide identification of MATE, functional analysis and molecular dynamics of DcMATE21 involved in anthocyanin accumulation in Daucus carota. Phytochemistry 210: 113676. 37059287
Sailer, C., A. Babst-Kostecka, M.C. Fischer, S. Zoller, A. Widmer, P. Vollenweider, F. Gugerli, and C. Rellstab. (2018). Transmembrane transport and stress response genes play an important role in adaptation of Arabidopsis halleri to metalliferous soils. Sci Rep 8: 16085. 30382172
Schlunk I., Krause K., Wirth S. and Kothe E. (2015). A transporter for abiotic stress and plant metabolite resistance in the ectomycorrhizal fungus Tricholoma vaccinum. Environ Sci Pollut Res Int. 22(24):19384-93. 25563836
Seo, P.J., J. Park, M.J. Park, Y.S. Kim, S.G. Kim, J.H. Jung, and C.M. Park. (2012). A Golgi-localized MATE transporter mediates iron homoeostasis under osmotic stress in Arabidopsis. Biochem. J. 442: 551-561. 22150160
Sham, L.T., E.K. Butler, M.D. Lebar, D. Kahne, T.G. Bernhardt, and N. Ruiz. (2014). Bacterial cell wall. MurJ is the flippase of lipid-linked precursors for peptidoglycan biogenesis. Science 345: 220-222. 25013077
Shitan, N., S. Minami, M. Morita, M. Hayashida, S. Ito, K. Takanashi, H. Omote, Y. Moriyama, A. Sugiyama, A. Goossens, M. Moriyasu, and K. Yazaki. (2014). Involvement of the leaf-specific multidrug and toxic compound extrusion (MATE) transporter Nt-JAT2 in vacuolar sequestration of nicotine in Nicotiana tabacum. PLoS One 9: e108789. 25268729
Shoji, T., K. Inai, Y. Yazaki, Y. Sato, H. Takase, N. Shitan, K. Yazaki, Y. Goto, K. Toyooka, K. Matsuoka, and T. Hashimoto. (2009). Multidrug and toxic compound extrusion-type transporters implicated in vacuolar sequestration of nicotine in tobacco roots. Plant Physiol. 149: 708-718. 19098091
Soldo, B., V. Lazarevic, M. Pagni, and D. Karamata. (1999). Teichuronic acid operon of Bacillus subtilis 168. Molec. Microbiol. 31: 795-805. 10048024
Song, H.X., A.M. Ping, M.X. Sun, X.H. Qi, M.Y. Gao, X.Y. Xu, Z.J. Zhu, M.L. Li, and L.P. Hou. (2017). Identification of genes related to floral organ development in pak choi by expression profiling. Genet Mol Res 16:. 28362994
Soto-Liebe, K., M.A. Méndez, L. Fuenzalida, B. Krock, A. Cembella, and M. Vásquez. (2012). PSP toxin release from the cyanobacterium Raphidiopsis brookii D9 (Nostocales) can be induced by sodium and potassium ions. Toxicon 60: 1324-1334. 22983012
Soto-Liebe, K., X.A. López-Cortés, J.J. Fuentes-Valdes, K. Stucken, F. Gonzalez-Nilo, and M. Vásquez. (2013). In silico analysis of putative paralytic shellfish poisoning toxins export proteins in cyanobacteria. PLoS One 8: e55664. 23457475
Su, X.Z., J. Chen, T. Mizushima, T. Kuroda, and T. Tsuchiya. (2005). AbeM, an H+-coupled Acinetobacter baumannii multidrug efflux pump belonging to the MATE family of transporters. Antimicrob. Agents Chemother. 49: 4362-4364. 16189122
Sun, X., E.M. Gilroy, A. Chini, P.L. Nurmberg, I. Hein, C. Lacomme, P.R. Birch, A. Hussain, B.W. Yun, and G.J. Loake. (2011). ADS1 encodes a MATE-transporter that negatively regulates plant disease resistance. New Phytol 192: 471-482. 21762165
Szeri, F., F. Niaziorimi, S. Donnelly, N. Fariha, M. Tertyshnaia, D. Patel, S. Lundkvist, and K. van de Wetering. (2022). The Mineralization Regulator ANKH Mediates Cellular Efflux of ATP, Not Pyrophosphate. J Bone Miner Res 37: 1024-1031. 35147247
Takanashi, K., K. Yokosho, K. Saeki, A. Sugiyama, S. Sato, S. Tabata, J.F. Ma, and K. Yazaki. (2013). LjMATE1: a citrate transporter responsible for iron supply to the nodule infection zone of Lotus japonicus. Plant Cell Physiol. 54: 585-594. 23385147
Tanaka, Y., C.J. Hipolito, A.D. Maturana, K. Ito, T. Kuroda, T. Higuchi, T. Katoh, H.E. Kato, M. Hattori, K. Kumazaki, T. Tsukazaki, R. Ishitani, H. Suga, and O. Nureki. (2013). Structural basis for the drug extrusion mechanism by a MATE multidrug transporter. Nature 496: 247-251. 23535598
Tanaka, Y., S. Iwaki, A. Sasaki, and T. Tsukazaki. (2021). Crystal structures of a nicotine MATE transporter provide insight into its mechanism of substrate transport. FEBS Lett. [Epub: Ahead of Print] 34050946
Tanaka, Y., S. Iwaki, and T. Tsukazaki. (2017). Crystal Structure of a Plant Multidrug and Toxic Compound Extrusion Family Protein. Structure 25: 1455-1460.e2. 28877507
Tanihara, Y., S. Masuda, T. Sato, T. Katsura, O. Ogawa, and K. Inui. (2007). Substrate specificity of MATE1 and MATE2-K, human multidrug and toxin extrusions/H+-organic cation antiporters. Biochem Pharmacol 74: 359-371. 17509534
Thompson, E.P., C. Wilkins, V. Demidchik, J.M. Davies, and B.J. Glover. (2010). An Arabidopsis flavonoid transporter is required for anther dehiscence and pollen development. J Exp Bot 61: 439-451. 19995827
Tocci, N., F. Iannelli, A. Bidossi, M.L. Ciusa, F. Decorosi, C. Viti, G. Pozzi, S. Ricci, and M.R. Oggioni. (2013). Functional analysis of pneumococcal drug efflux pumps associates the MATE DinF transporter with quinolone susceptibility. Antimicrob. Agents Chemother. 57: 248-253. 23114782
Vanni, S., P. Campomanes, M. Marcia, and U. Rothlisberger. (2012). Ion binding and internal hydration in the multidrug resistance secondary active transporter NorM investigated by molecular dynamics simulations. Biochemistry 51: 1281-1287. 22295886
Vasseur P., C. Soscia, R. Voulhoux, and A. Filloux. (2007). PelC is a Pseudomonas aeruginosa outer membrane lipoprotein of the OMA family of proteins involved in exopolysaccharide transport. Biochimie. 89(8): 903-915. 17524545
Vasudevan, P., J. McElligott, C. Attkisson, M. Betteken, and D.L. Popham. (2009). Homologues of the Bacillus subtilis SpoVB protein are involved in cell wall metabolism. J. Bacteriol. 191: 6012-6019. 19648239
Vincent, C., P. Doublet, C. Grangeasse, E. Vaganay, A.J. Cozzone, and B. Duclos. (1999). Cells of Escherichia coli contain a protein-tyrosine kinase, Wzc, and a phosphotyrosine-protein phosphatase, Wzb. J. Bacteriol. 181: 3472-3477. 10348860
Vleugels, W., M.A. Haeuptle, B.G. Ng, J.C. Michalski, R. Battini, C. Dionisi-Vici, M.D. Ludman, J. Jaeken, F. Foulquier, H.H. Freeze, G. Matthijs, and T. Hennet. (2009). RFT1 deficiency in three novel CDG patients. Hum Mutat 30: 1428-1434. 19701946
Vujica, L., J. Lončar, L. Mišić, B. Lučić, K. Radman, I. Mihaljević, B. Bertoša, J. Mesarić, M. Horvat, and T. Smital. (2023). Environmental contaminants modulate transport activity of zebrafish (Danio rerio) multidrug and toxin extrusion protein 3 (Mate3/Slc47a2.1). Sci Total Environ 901: 165956. [Epub: Ahead of Print] 37541507
Wang, R., X. Liu, S. Liang, Q. Ge, Y. Li, J. Shao, Y. Qi, L. An, and F. Yu. (2015). A subgroup of MATE transporter genes regulates hypocotyl cell elongation in Arabidopsis. J Exp Bot 66: 6327-6343. 26160579
Watanabe, M., S. Otagaki, S. Matsumoto, and K. Shiratake. (2022). Genome-Wide Analysis of Multidrug and Toxic Compound Extruction Transporters in Grape. Front Plant Sci 13: 892638. 35909729
Whitfield, C. and I.S. Roberts. (1999). Structure, assembly and regulation of expression of capsules in Escherichia coli. Mol. Microbiol. 31: 1307-1319. 10200953
Yang, S., C.R. Lopez, and E.L. Zechiedrich. (2006). Quorum sensing and multidrug transporters in Escherichia coli. Proc. Natl. Acad. Sci. USA 103: 2386-2391. 16467145
Yang, Y., Z. Zhang, P. Li, W. Kong, X. Liu, and L. Liu. (2021). A Whole-Body Physiologically Based Pharmacokinetic Model Characterizing Interplay of OCTs and MATEs in Intestine, Liver and Kidney to Predict Drug-Drug Interactions of Metformin with Perpetrators. Pharmaceutics 13:. 34064886
Yonezawa, A., S. Masuda, S. Yokoo, T. Katsura, and K. Inui. (2006). Cisplatin and oxaliplatin, but not carboplatin and nedaplatin, are substrates for human organic cation transporters (SLC22A1-3 and multidrug and toxin extrusion family). J Pharmacol Exp Ther 319: 879-886. 16914559
Young, K.D. (2014). Microbiology. A flipping cell wall ferry. Science 345: 139-140. 25013047
Yuan, J., Z. Qiu, Y. Long, Y. Liu, J. Huang, J. Liu, and Y. Yu. (2023). Functional identification of PhMATE1 in flower color formation in petunia. Physiol Plant e13949. [Epub: Ahead of Print] 37291826
Zakrzewska, S., A.R. Mehdipour, V.N. Malviya, T. Nonaka, J. Koepke, C. Muenke, W. Hausner, G. Hummer, S. Safarian, and H. Michel. (2019). Inward-facing conformation of a multidrug resistance MATE family transporter. Proc. Natl. Acad. Sci. USA. [Epub: Ahead of Print] 31160466
Zhang X., He X., Baker J., Tama F., Chang G. and Wright SH. (2012). Twelve transmembrane helices form the functional core of mammalian MATE1 (multidrug and toxin extruder 1) protein. J Biol Chem. 287(33):27971-82. 22722930
Zhang, H., F.G. Zhao, R.J. Tang, Y. Yu, J. Song, Y. Wang, L. Li, and S. Luan. (2017). Two tonoplast MATE proteins function as turgor-regulating chloride channels in Arabidopsis. Proc. Natl. Acad. Sci. USA 114: E2036-E2045. 28202726
Zhang, H., H. Zhu, Y. Pan, Y. Yu, S. Luan, and L. Li. (2014). A DTX/MATE-type transporter facilitates abscisic acid efflux and modulates ABA sensitivity and drought tolerance in Arabidopsis. Mol Plant 7: 1522-1532. 24851876
Zhao, J. and R.A. Dixon. (2009). MATE transporters facilitate vacuolar uptake of epicatechin 3''-O-glucoside for proanthocyanidin biosynthesis in Medicago truncatula and Arabidopsis. Plant Cell 21: 2323-2340. 19684242
Zhou, G., E. Delhaize, M. Zhou, and P.R. Ryan. (2013). The barley MATE gene, HvAACT1, increases citrate efflux and Al3+ tolerance when expressed in wheat and barley. Ann Bot 112: 603-612. 23798600