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3.A.1.141.1
The ethyl (methyl; benzyl) viologen export pump, EvrABC (EvrB and EvrC of 6 TMSs are members of the large DUF990 superfamily (Prosecka et al., 2009); They appear to be of the ABC-2 topological type).

Accession Number:P73329
Protein Name:ABC transporter
Length:326
Molecular Weight:36621.00
Species:Synechocystis sp. (strain PCC 6803) [1148]
Number of TMSs:1
Location1 / Topology2 / Orientation3: Endoplasmic reticulum-Golgi intermediate compartment membrane1 / Single-pass type I membrane protein2
Substrate Ethyl viologen, Methyl viologen, Benzyl viologen

Cross database links:

RefSeq: NP_440679.1   
Entrez Gene ID: 953982   
Pfam: PF00005   
BioCyc: SSP1148:SLR1901-MONOMER   
KEGG: syn:slr1901   

Gene Ontology

GO:0005524 F:ATP binding
GO:0016887 F:ATPase activity

References (1)

[1] “Sequence analysis of the genome of the unicellular cyanobacterium Synechocystis sp. strain PCC6803. II. Sequence determination of the entire genome and assignment of potential protein-coding regions.”  Kaneko T.et.al.   8905231

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Predict TMSs (Predict number of transmembrane segments)
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FASTA formatted sequence
1:	MVENLSKVYP IALKSPGLKG TLQHFWQRRY RQILAVQDIS FTIPPGAMVG FLGANGAGKT 
61:	TTLKMLTGLI KPSGGKVRVA GFDPFRRQTA FLRRTSLVMG QKQQLIWDLP TLDSLRINGA 
121:	IYEIPDQVFE QRLGELSEML DLTTELKQPV RKLSLGQRMK AELLAALLHH PTVLFLDEPT 
181:	LGLDVNAQVA VRRFLQEYNR RYQATVLLTS HYMADITTLC ERVLLIHQGQ LMYDGDLEAL 
241:	VERFSPYRQV AVELSAPIPL EKLQLYGEVE SVEGLLVRFL LKRESLTTAI AKLLAELPVS 
301:	DLSVSDPPIE EIIGRLFSQG NLDNKL