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2.A.36.4.1
[Na+ or K+]:H+ antiporter Nha1 of 985 aas and 13 or 14 predicted TMSs, all at the N-terminus of the protein in a possible 6 +1 + 6 TMS arrangement. The ceontral TMS is much lower in hydrophobicity than the other TMSs.  All TMSs are in residues 1 - 430 while the rest of the protein is strongly hydrophilic.

Accession Number:Q99271
Protein Name:NAH1 aka Nha1 aka YLR138w aka L3149 aka L9606.4
Length:985
Molecular Weight:109369.00
Species:Saccharomyces cerevisiae (Baker's yeast) [4932]
Number of TMSs:13
Location1 / Topology2 / Orientation3: Membrane1 / Multi-pass membrane protein2
Substrate sodium(1+), potassium(1+), hydron

Cross database links:

DIP: DIP-6364N
RefSeq: NP_013239.1   
Entrez Gene ID: 850829   
Pfam: PF00999    PF08619   
KEGG: sce:YLR138W   

Gene Ontology

GO:0016021 C:integral to membrane
GO:0045121 C:membrane raft
GO:0005886 C:plasma membrane
GO:0005515 F:protein binding
GO:0015385 F:sodium:hydrogen antiporter activity
GO:0030007 P:cellular potassium ion homeostasis
GO:0006970 P:response to osmotic stress
GO:0006814 P:sodium ion transport
GO:0055085 P:transmembrane transport

References (9)

[1] “Characterization of the NHA1 gene encoding a Na+/H+-antiporter of the yeast Saccharomyces cerevisiae.”  Prior C.et.al.   8654575
[2] “The nucleotide sequence of Saccharomyces cerevisiae chromosome XII.”  Johnston M.et.al.   9169871
[3] “Global analysis of protein expression in yeast.”  Ghaemmaghami S.et.al.   14562106
[4] “Quantitative phosphoproteomics applied to the yeast pheromone signaling pathway.”  Gruhler A.et.al.   15665377
[5] “A global topology map of the Saccharomyces cerevisiae membrane proteome.”  Kim H.et.al.   16847258
[6] “Large-scale phosphorylation analysis of alpha-factor-arrested Saccharomyces cerevisiae.”  Li X.et.al.   17330950
[7] “Analysis of phosphorylation sites on proteins from Saccharomyces cerevisiae by electron transfer dissociation (ETD) mass spectrometry.”  Chi A.et.al.   17287358
[8] “Proteome-wide identification of in vivo targets of DNA damage checkpoint kinases.”  Smolka M.B.et.al.   17563356
[9] “A multidimensional chromatography technology for in-depth phosphoproteome analysis.”  Albuquerque C.P.et.al.   18407956
Structure:
6QK8     

External Searches:

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Predict TMSs (Predict number of transmembrane segments)
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FASTA formatted sequence
1:	MAIWEQLEVS KAHVAYACVG VFSSIFSLVS LYVKEKLYIG ESTVAGIFGL IVGPVCLNWF 
61:	NPLKWGNSDS ITLEITRIVL CLQIFAVAVE LPRKYMLKHW VSVTMLLLPV MTAGWLIIGL 
121:	FVWILIPGLN FSASLLISAC ITATDPILAQ SVVSGKFAQR VPGHLRNLLS AESGCNDGMA 
181:	FPFLFLSMNL ILHPGNGREI VKDWICVTIL YECLFGCLLG CFIGYVGRIT IRFAEKKNII 
241:	DRESFLAFYV VLAFMCAGFG SILGVDDLLV SFAAGATFAW DGWFSQKTQE SNVSTVIDLL 
301:	LNYAYFIYFG AIIPWSQFNN GEIGTNVWRL IILSIVVIFL RRIPAVMILR PLIPDIKSWR 
361:	EALFVGHFGP IGVGAIFAAI LARGELESTF SDEPTPLNVV PSKEESKHWQ LIACIWPITC 
421:	FFIVTSIIVH GSSVAIITLG RHLNTITLTK TFTTHTTNGD NGKSSWMQRL PSLDKAGRSF 
481:	SLHRMDTQMT LSGDEGEAEE GGGRKGLAGG EDEEGLNNDQ IGSVATSGIP ARPAGGMPRR 
541:	RKLSRKEKRL NRRQKLRNKG REIFSSRSKN EMYDDDELND LGRERLQKEK EARAATFALS 
601:	TAVNTQRNEE IGMGGDEEED EYTPEKEYSD NYNNTPSFES SERSSSLRGR TYVPRNRYDG 
661:	EETESEIESE DEMENESERS MASSEERRIR KMKEEEMKPG TAYLDGNRMI IENKQGEILN 
721:	QVDIEDRNEA RDDEVSVDST AHSSLTTTMT NLSSSSGGRL KRILTPTSLG KIHSLVDKGK 
781:	DKNKNSKYHA FKIDNLLIIE NEDGDVIKRY KINPHKSDDD KSKNRPRNDS VVSRALTAVG 
841:	LKSKANSGVP PPVDEEKAIE GPSRKGPGML KKRTLTPAPP RGVQDSLDLE DEPSSEEDLG 
901:	DSYNMDDSED YDDNAYESET EFERQRRLNA LGEMTAPADQ DDEELPPLPV EAQTGNDGPG 
961:	TAEGKKKQKS AAVKSALSKT LGLNK