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3.A.1.114.1
Glycolipid exporter (under nitrogen control in heterocysts), DevABC-HgdD (Moslavac et al., 2007). Heterocyst envelope glycolipids (HGLs) function as an O2 diffusion barrier, being deposited over the heterocyst outer membrane, surrounded by an outermost heterocyst polysaccharide envelope. DevBCA and TolC form an ATP-driven efflux pump required for the export of HGLs across the Gram-negative cell wall (Staron et al., 2011). DevB, the MFP, must be hexameric to create a functional export complex.  This system is under NtcA and nitrogen control and is required for heterocyst development (Fiedler et al. 2001).

Accession Number:Q7A2B0
Protein Name:DevB
Length:474
Molecular Weight:51618.00
Species:Anabaena sp. (strain PCC 7120) [103690]
Number of TMSs:1
Location1 / Topology2 / Orientation3: Cell outer membrane1
Substrate glycolipid

Cross database links:

RefSeq: NP_487750.1   
Entrez Gene ID: 1107308   
BioCyc: NSP103690:ALR3710-MONOMER   
KEGG: ana:alr3710   

References (1)

[1] “Complete genomic sequence of the filamentous nitrogen-fixing cyanobacterium Anabaena sp. strain PCC 7120.”  Kaneko T.et.al.   11759840

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Predict TMSs (Predict number of transmembrane segments)
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FASTA formatted sequence
1:	MSRVTEERRS REQPLDLEQP KIWWGLAVAL PVAVAAGLLA TAKFEQLKRL GPSVPVKPVI 
61:	TSVSAVGRLE PQGEVIKLSA PVGGMQSASR VKQLFVKEGE RVRKGQVIAI LDNHDTQLAA 
121:	VEEAKAKLLE SRANLAQVRV GSPRDIQAQT AVIARLQAQL VGEMGAQQAS ITRIASQLSG 
181:	EKVAQQALVN RLEAELVGQQ DSLRATLNRI RAEQRNAQVD AGRYDFLYRE GAISQQERDR 
241:	RRLTATTANQ QVIESQAALR QALATLRQQV AEARANQMKT LASLQQQLIE ARVTRDKTIT 
301:	TLQRQIDEEK ARLKRLVEVS PTDVQMAQAQ VSNAIANVRR AEAELKLSYI QAPSAGEILK 
361:	IYSKSGEAIT ADGIAEMGET EQMMIIAEVP EDSIGRVRIG QTVTANSDNG AFSGEIRGTV 
421:	TEIGRKIGKK DVLNTDPAAD VDARVVEVKI ALSPEDSQKV SGLTYAKVVV DINK