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3.A.1.1.28
The raffinose/stachyose transporter, MsmEFGK (MalK (3.A.1.1.27) can probably substitute for MsmK; Webb et al., 2008). This system may also transport melibiose, isomaltotriose and sucrose as well as isomaltosaccharides (Russell et al. 1992).

Accession Number:Q00750
Protein Name:MsmF aka SMU.879
Length:290
Molecular Weight:31917.00
Species:Streptococcus mutans [1309]
Number of TMSs:6
Location1 / Topology2 / Orientation3: Cell membrane1 / Multi-pass membrane protein2
Substrate Raffinose, Stachyose

Cross database links:

RefSeq: NP_721288.1   
Entrez Gene ID: 1028242   
Pfam: PF00528   
BioCyc: SMUT210007:SMU_879-MONOMER   
KEGG: smu:SMU.879   

Gene Ontology

GO:0016021 C:integral to membrane
GO:0005886 C:plasma membrane
GO:0005215 F:transporter activity
GO:0008643 P:carbohydrate transport

References (2)

[1] “A binding protein-dependent transport system in Streptococcus mutans responsible for multiple sugar metabolism.”  Russell R.R.B.et.al.   1537846
[2] “Genome sequence of Streptococcus mutans UA159, a cariogenic dental pathogen.”  Ajdic D.J.et.al.   12397186

External Searches:

Analyze:

Predict TMSs (Predict number of transmembrane segments)
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FASTA formatted sequence
1:	MTIRKVLNKY WGWTFLIVPL ILQVVFFYFP MFQGAFYSFT NWTGLTYNFD FVGINNYKIL 
61:	MTDGKFMKAI GFTLVLTLAL IVGEIVLGII IARALNAKIK GKTFFRAWFF FPAVLSGLTV 
121:	SLIFKQVFNY GLPAVGSALG IKFLETSMLG TANGAVIASI FVLLWQGVAM PIILFLSGLQ 
181:	SIPSEIVEAA AIDGADSKQT FWSVELPYLL PSISMVFIMA LKAGLTAFDQ IFALTGGGPN 
241:	NSTTSLGLLV YNYAFKSNQY GYANAIALIL FIIIGIVSVL QIKLSKKFEV