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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:Q746T4
Protein Name:NuoI aka GSU3434
Length:176
Molecular Weight:19843.00
Species:Geobacter sulfurreducens [35554]
Location1 / Topology2 / Orientation3: Cell inner membrane1 / Peripheral membrane protein2
Substrate hydron

Cross database links:

RefSeq: NP_954474.1   
Entrez Gene ID: 2686858   
Pfam: PF00037   
BioCyc: GSUL243231:GSU_3434-MONOMER   
KEGG: gsu:GSU3434   

Gene Ontology

GO:0005886 C:plasma membrane
GO:0051539 F:4 iron, 4 sulfur cluster binding
GO:0009055 F:electron carrier activity
GO:0005506 F:iron ion binding
GO:0050136 F:NADH dehydrogenase (quinone) activity
GO:0048038 F:quinone binding
GO:0055114 P:oxidation reduction
GO:0019684 P:photosynthesis, light reaction

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:	MPILTDFKAI ATGLFVTWKH IFRRPVTVEY PEVKRTPAPR YRARIVLTRD PDGGERCVAC 
61:	YLCSAACPVD CISMEAAEGE EGRRYARWFR INFSRCIFCG LCAEACPTLA IQMTPDYEIC 
121:	ERDIMELVYE KEDLLIDGCG KDAGYNFYRH AGIGVAQPRG AGECEEEPVD VRGLMP