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2.A.1.2.62
Putative MDR pump, YdhC or PunC.  It has been reporte to export arabinose but not xylose (Koita and Rao 2012). However, it also takes up adenosine, adenine, deoxyadenosine, and other purine nucleosides and nucleobases such as inosine and guanosine as sole nitrogen sources. It also takes up various sulfonamides such as sulfathiazole, sulfadiazine and sulfamethoxazole.  Expression of the punC gene is reglulated by the positive transcription factor, PunR (YdhB) (Rodionova et al. 2021).

Accession Number:P37597
Protein Name:Inner membrane transport protein ydhC
Length:403
Molecular Weight:43367.00
Species:Escherichia coli (strain K12) [83333]
Number of TMSs:12
Location1 / Topology2 / Orientation3: Cell inner membrane1 / Multi-pass membrane protein2
Substrate 7H-purine, adenine, adenosine, guanosine, inosine, nebularine, arabinose, sulfathiazole, sulfonamide, drug, sulfamethoxazole

Cross database links:

Entrez Gene ID: 946077   
Pfam: PF07690   
KEGG: eco:b1660   

Gene Ontology

GO:0016021 C:integral to membrane
GO:0005886 C:plasma membrane
GO:0005215 F:transporter activity
GO:0055085 P:transmembrane transport

References (5)

[1] “A 570-kb DNA sequence of the Escherichia coli K-12 genome corresponding to the 28.0-40.1 min region on the linkage map.”  Aiba H.et.al.   9097039
[2] “The complete genome sequence of Escherichia coli K-12.”  Blattner F.R.et.al.   9278503
[3] “Escherichia coli K-12: a cooperatively developed annotation snapshot -- 2005.”  Riley M.et.al.   16397293
[4] “Highly accurate genome sequences of Escherichia coli K-12 strains MG1655 and W3110.”  Hayashi K.et.al.   16738553
[5] “Global topology analysis of the Escherichia coli inner membrane proteome.”  Daley D.O.et.al.   15919996

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Predict TMSs (Predict number of transmembrane segments)
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FASTA formatted sequence 
1:	MQPGKRFLVW LAGLSVLGFL ATDMYLPAFA AIQADLQTPA SAVSASLSLF LAGFAAAQLL 
61:	WGPLSDRYGR KPVLLIGLTI FALGSLGMLW VENAATLLVL RFVQAVGVCA AAVIWQALVT 
121:	DYYPSQKVNR IFAAIMPLVG LSPALAPLLG SWLLVHFSWQ AIFATLFAIT VVLILPIFWL 
181:	KPTTKARNNS QDGLTFTDLL RSKTYRGNVL IYAACSASFF AWLTGSPFIL SEMGYSPAVI 
241:	GLSYVPQTIA FLIGGYGCRA ALQKWQGKQL LPWLLVLFAV SVIATWAAGF ISHVSLVEIL 
301:	IPFCVMAIAN GAIYPIVVAQ ALRPFPHATG RAAALQNTLQ LGLCFLASLV VSWLISISTP 
361:	LLTTTSVMLS TVVLVALGYM MQRCEEVGCQ NHGNAEVAHS ESH