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3.D.9.1.1
F420H2 dehydroxygenase, FpoABCFDHIJKLMNO (Fpo = F420:phenazine oxidoreductase) (Welte and Deppenmeier 2013).  Found in both Euryarchaota and Bathyarchaeota (Evans et al. 2015).

Accession Number:Q9P9F6
Protein Name:FpoK aka MM2483
Length:102
Molecular Weight:11277.00
Species:Methanosarcina mazei (Methanosarcina frisia) [2209]
Number of TMSs:3
Location1 / Topology2 / Orientation3: Cell membrane1 / Multi-pass membrane protein2
Substrate hydron

Cross database links:

RefSeq: NP_634507.1   
Entrez Gene ID: 1480825   
Pfam: PF00420   
BioCyc: MMAZ192952:MM2483-MONOMER   
KEGG: mma:MM_2483   

Gene Ontology

GO:0016651 F:oxidoreductase activity, acting on NADH or ...
GO:0042773 P:ATP synthesis coupled electron transport

References (2)

[1] “The F(420)H(2) dehydrogenase from Methanosarcina mazei is a redox-driven proton pump closely related to NADH dehydrogenases.”  Baeumer S.et.al.   10751389
[2] “The genome of Methanosarcina mazei: evidence for lateral gene transfer between Bacteria and Archaea.”  Deppenmeier U.et.al.   12125824

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Predict TMSs (Predict number of transmembrane segments)
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FASTA formatted sequence 
1:	MTAIPLTFYL GLAALLFSIG LYGVMTHKSG IRLIMCIELM LNSANLNLVA FSSYTDTLHG 
61:	QVFAMFSIAL AAAEAAVGFA IFMAIYRMHD KINLDELNIL RW