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3.A.1.12.2
Glycine betaine OpuAA/AB/AC porter (also transports dimethylsulfonioacetate and dimethylsulfoniopropionate).  The system has been reconstituted in nanodiscs and shows substrate-dependent ionic stringth-gated gating and energy coupling dependent on anionic lipids (Karasawa et al. 2013).

Accession Number:P46922
Protein Name:OPAC aka OpuAC
Length:293
Molecular Weight:32215.00
Species:Bacillus subtilis [1423]
Number of TMSs:1
Location1 / Topology2 / Orientation3: Cell membrane1 / Lipid-anchor2
Substrate glycine betaine, (carboxymethyl)(dimethyl)sulfonium, S,S-dimethyl-beta-propiothetin

Cross database links:

RefSeq: NP_388182.1   
Entrez Gene ID: 938354   
Pfam: PF04069   
KEGG: bsu:BSU03000   

Gene Ontology

GO:0005886 C:plasma membrane
GO:0005488 F:binding
GO:0005215 F:transporter activity
GO:0006865 P:amino acid transport

References (3)

[1] “OpuA, an osmotically regulated binding protein-dependent transport system for the osmoprotectant glycine betaine in Bacillus subtilis.”  Kempf B.et.al.   7622480
[2] “The 25 degrees-36 degrees region of the Bacillus subtilis chromosome: determination of the sequence of a 146 kb segment and identification of 113 genes.”  Yamane K.et.al.   8969502
[3] “The complete genome sequence of the Gram-positive bacterium Bacillus subtilis.”  Kunst F.et.al.   9384377
Structure:
2B4L   2B4M   3CHG   5NXX     

External Searches:

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Predict TMSs (Predict number of transmembrane segments)
Window Size: Angle:  
FASTA formatted sequence 
1:	MLKKIIGIGV SAMLALSLAA CGSENDENAS AAEQVNKTII GIDPGSGIMS LTDKAMKDYD 
61:	LNDWTLISAS SAAMTATLKK SYDRKKPIII TGWTPHWMFS RYKLKYLDDP KQSYGSAEEI 
121:	HTITRKGFSK EQPNAAKLLS QFKWTQDEMG EIMIKVEEGE KPAKVAAEYV NKHKDQIAEW 
181:	TKGVQKVKGD KINLAYVAWD SEIASTNVIG KVLEDLGYEV TLTQVEAGPM WTAIATGSAD 
241:	ASLSAWLPNT HKAYAAKYKG KYDDIGTSMT GVKMGLVVPQ YMKNVNSIED LKK