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3.D.1.1.1
NADH dehydrogenase I, NuoA-N.  NuoL probably comprises part of the proton pathway (Nakamaru-Ogiso et al. 2010).  NuoL (ND5), NuoM (ND4) and NuoN (ND2) are all homologous to proton:sodium antiporters and may all play reoles in pumping protons using a similar mechanism (Sato et al. 2013).

Accession Number:P0AFD4
Protein Name:NUOH aka B2282
Length:325
Molecular Weight:36219.00
Species:Escherichia coli [83333]
Number of TMSs:8
Location1 / Topology2 / Orientation3: Cell inner membrane1 / Multi-pass membrane protein2
Substrate hydron

Cross database links:

RefSeq: AP_002880.1    NP_416785.1   
Entrez Gene ID: 946761   
Pfam: PF00146   
BioCyc: EcoCyc:NUOH-MONOMER    ECOL168927:B2282-MONOMER    MetaCyc:NUOH-MONOMER   
KEGG: ecj:JW2277    eco:b2282   

Gene Ontology

GO:0005887 C:integral to plasma membrane
GO:0045272 C:plasma membrane respiratory chain complex I
GO:0050136 F:NADH dehydrogenase (quinone) activity
GO:0015453 F:oxidoreduction-driven active transmembrane ...
GO:0048038 F:quinone binding
GO:0009060 P:aerobic respiration
GO:0009061 P:anaerobic respiration
GO:0055114 P:oxidation reduction

References (5)

[1] “The gene locus of the proton-translocating NADH: ubiquinone oxidoreductase in Escherichia coli. Organization of the 14 genes and relationship between the derived proteins and subunits of mitochondrial complex I.”  Weidner U.et.al.   7690854
[2] “Construction of a contiguous 874-kb sequence of the Escherichia coli-K12 genome corresponding to 50.0-68.8 min on the linkage map and analysis of its sequence features.”  Yamamoto Y.et.al.   9205837
[3] “The complete genome sequence of Escherichia coli K-12.”  Blattner F.R.et.al.   9278503
[4] “Highly accurate genome sequences of Escherichia coli K-12 strains MG1655 and W3110.”  Hayashi K.et.al.   16738553
[5] “Global topology analysis of the Escherichia coli inner membrane proteome.”  Daley D.O.et.al.   15919996

External Searches:

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Predict TMSs (Predict number of transmembrane segments)
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FASTA formatted sequence 
1:	MSWISPELIE ILLTILKAVV ILLVVVTCGA FMSFGERRLL GLFQNRYGPN RVGWGGSLQL 
61:	VADMIKMFFK EDWIPKFSDR VIFTLAPMIA FTSLLLAFAI VPVSPGWVVA DLNIGILFFL 
121:	MMAGLAVYAV LFAGWSSNNK YSLLGAMRAS AQTLSYEVFL GLSLMGVVAQ AGSFNMTDIV 
181:	NSQAHVWNVI PQFFGFITFA IAGVAVCHRH PFDQPEAEQE LADGYHIEYS GMKFGLFFVG 
241:	EYIGIVTISA LMVTLFFGGW QGPLLPPFIW FALKTAFFMM MFILIRASLP RPRYDQVMSF 
301:	GWKICLPLTL INLLVTAAVI LWQAQ