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3.D.10.1.1
Succinate:menaquinone oxidoreductase, SdhABC (pmf consuming when starting with succinate; pmf generating when starting with fumarate (the reverse reaction)).  Transmembrane electron transfer is coupled to protolytic reactions on opposite sides of the membrane, allowing the transmembrane pmf to drive the endergonic oxidation of succinate by menaquinone by the dihaem-containing SQR (Lancaster et al. 2008).

Accession Number:Q65GF5
Protein Name:SdhB
Length:254
Molecular Weight:28409.00
Species:Bacillus licheniformis (strain DSM 13 / ATCC 14580) [279010]
Location1 / Topology2 / Orientation3: Cell membrane1 / Multi-pass membrane protein2
Substrate fumarate(2-), menaquinone, succinate(2-)

Cross database links:

RefSeq: YP_080136.1    YP_092552.1   
Entrez Gene ID: 3027395    3098515   
BioCyc: BLIC279010-1:BLI02992-MONOMER    BLIC279010:BL00320-MONOMER   
KEGG: bld:BLi02992    bli:BL00320   

Gene Ontology

GO:0009055 F:electron carrier activity
GO:0051536 F:iron-sulfur cluster binding
GO:0016491 F:oxidoreductase activity
GO:0055114 P:oxidation reduction
GO:0006099 P:tricarboxylic acid cycle

References (2)

[1] “The complete genome sequence of Bacillus licheniformis DSM13, an organism with great industrial potential.”  Veith B.et.al.   15383718
[2] “Complete genome sequence of the industrial bacterium Bacillus licheniformis and comparisons with closely related Bacillus species.”  Rey M.W.et.al.   15461803

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Predict TMSs (Predict number of transmembrane segments)
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FASTA formatted sequence 
1:	MSENKTIKFI ITRQDTSDSN PYQEEFEIPY RPNMNVISAL MEIRRNPVNA KGEKTSPIAW 
61:	DMNCLEEVCG ACSMVINGKP RQSCTALIDQ LEQPIRLEPM KTFPVVRDLQ VDRSRMFDSL 
121:	KKVKAWVPID GTYDLGPGPR MPERRRQWAY ELSKCMTCGV CLEACPNVND KTNFMGPAPL 
181:	SQVRLFNTHP TGAMNKSERL EAIMGDGGLA ECGNSQNCVQ SCPKGIPLTT SIAALNRDTT 
241:	VQAFKNFFGS DNTE