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3.D.1.5.1
Proton-translocating NADH dehydrogenase I.  NDUFS4 is an accessory subunit of the mitochondrial membrane respiratory chain NADH dehydrogenase (Complex I), that is believed not to be involved in catalysis.  However, a knockout of NDUFS4 in human iPSCs provides a model for mitochondrial complex I deficiencyin humans (Goolab et al. 2025).

Accession Number:Q74GA7
Protein Name:NuoB aka GSU0339
Length:170
Molecular Weight:18366.00
Species:Geobacter sulfurreducens [35554]
Location1 / Topology2 / Orientation3: Cell inner membrane1 / Peripheral membrane protein2 / Cytoplasmic side3
Substrate hydron

Cross database links:

RefSeq: NP_951399.1   
Entrez Gene ID: 2686798   
Pfam: PF01058   
BioCyc: GSUL243231:GSU_0339-MONOMER   
KEGG: gsu:GSU0339   

Gene Ontology

GO:0005886 C:plasma membrane
GO:0051539 F:4 iron, 4 sulfur cluster binding
GO:0005506 F:iron ion binding
GO:0008137 F:NADH dehydrogenase (ubiquinone) activity
GO:0048038 F:quinone binding
GO:0055114 P:oxidation reduction
GO:0019684 P:photosynthesis, light reaction
GO:0006810 P:transport

References (1)

[1] “Genome of Geobacter sulfurreducens: metal reduction in subsurface environments.”  Methe B.A.et.al.   14671304

External Searches:

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Predict TMSs (Predict number of transmembrane segments)
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FASTA formatted sequence 
1:	MGVDQPLGDN FITTSLDSLV NWARKSSIWP MTFGLACCAI EMMATGASHN DLDRFGIIFR 
61:	ASPRQSDCII IAGTVTKKML PVIKTVYEQM PEPKWVVAMG ACACSGGVFD TYSVVQGIDT 
121:	ALPVDVYIPG CPPRPEALLY GLLKLQDKIM KDKNSFGSTI GLGERLESAA