KpKP13 Protein target profile

NADH-quinone oxidoreductase subunit I

Accession: KP13_00986

Gene: AHE43484.1 nuoI 3D evidence: AlphaFold DB model + ColabFold model UniProt A0A0H3GWA7
Length 180
Pocket druggability (P2Rank · AlphaFold DB model) 0.179
Direct ligand evidence 0 65 total records
Functional annotation 1 EC 8 GO
Target summary

Target candidate with partial support; inspect missing evidence before prioritizing.

Automated synthesis of the evidence currently loaded. Review the underlying records before prioritizing this protein.

Terms and data sources used on this page

PDB: experimentally determined structures from the Protein Data Bank. These are the strongest structural evidence, but may cover only part of the protein.

AlphaFold DB model: a precomputed predicted structure downloaded from AlphaFold Database/UniProt, not an experiment performed here.

ColabFold model: a predicted structure generated for this workspace; interpret it with coverage and confidence.

pLDDT: confidence score for predicted structures. High values support local geometry; low values mean the region should not drive pocket interpretation.

FPocket / P2Rank: software tools that predict possible ligand-binding pockets on a 3D structure. They are useful screening signals, not experimental validation.

Druggability: a pocket-based estimate of whether a small molecule could bind productively. It does not mean a drug already exists.

PDB ligand: a compound observed in an experimental structure. Direct same-protein records are stronger than homolog-transferred records.

ChEMBL: a public database of measured compound bioactivity. Direct entries are stronger than entries transferred from similar proteins.

ZINC: a purchasable-compound database. Here it marks proposed candidates from chemical similarity, not measured binders.

LigQ / LigQ_2: an internal Target pipeline step that gathers PDB, ChEMBL, and ZINC ligand evidence for each protein.

Off-target: sequence similarity to proteins we prefer not to hit, such as human proteins or beneficial gut microbiome proteins.

DEG: Database of Essential Genes. A match suggests the protein resembles genes known to be essential in other organisms.

Roary / CoreCruncher: pan-genome tools used to decide whether a gene is core across analyzed strains or accessory/strain-specific.

EC / GO: functional annotations: EC describes enzyme reactions; GO describes biological process, molecular function, or cellular component.

KEGG pathway: a curated metabolic route label used here to group reactions imported from the metabolic model.

Chokepoint: a metabolic reaction that is the only producer or consumer of a metabolite in the imported model.

Prioritization evidence

Selectivity, essentiality, structural confidence, conservation, and predicted binding-site evidence.

Off-target risk

Human off-target
Hit
Human identity (%)
47.917 Lower values reduce human off-target concern.
Human E-value
7.04e-07
Gut microbiome similarity
2.8% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

Essential (DEG)
Y
DEG identity (%)
80.488 Higher values support similarity to known essential genes.
DEG E-value
4.2899999999999996e-98 Smaller values mean stronger essential-gene similarity.

Structure confidence

ColabFold pLDDT
96.86 0-100 confidence; >70 supports local structural interpretation.

Binding-site evidence

AlphaFold DB / UniProt model

P2Rank's binding-site probability is the primary druggability signal shown across the app; FPocket's druggability score is shown alongside it for comparison. Both estimate small-molecule pocket quality after applying the curated structure priority — neither is experimental binding evidence. The 3D viewer may show a different loaded structure, so visible pockets can differ.

Druggability (P2Rank) 0.179
Structure A0A0H3GWA7
Pocket Pocket 1
Druggability (FPocket) 0.372
Structure A0A0H3GWA7
Pocket Pocket 4
ColabFold model
P2Rank 0.159 · Pocket 1
FPocket 0.44 · Pocket 7
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 134 / 4744 genomes with a hit
Prevalence 2.8%

Sequence

Primary amino-acid sequence viewer.

MTLKELLVGFGTQVRSIWMIGLHAFAKRETRMYPEEPVYLPPRYRGRIVLTRDPDGAERCVACNLCAVACPVGCISLQKAETVDGRWYPEFFRINFSRCIFCGLCEEACPTTAIQLTPDFELGEYKRQDLVYEKEDLLISGPGKYPEYNFYRMAGMAIDGKDKGEAENEAKPIDVKSLLP

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

1 EC 8 GO

Subcellular localization

Localization
Cytoplasmic

Enzyme Commission (EC)

1

Gene Ontology (GO)

8
  • GO:0016020 A lipid bilayer along with all the proteins and protein complexes embedded in it and attached to it.
  • GO:0051539 Binding to a 4 iron, 4 sulfur (4Fe-4S) cluster; this cluster consists of four iron atoms, with the inorganic sulfur atoms found between the irons and acting as bridging ligands.
  • GO:0016651 Catalysis of an oxidation-reduction (redox) reaction in which NADH or NADPH acts as a hydrogen or electron donor and reduces a hydrogen or electron acceptor.
  • GO:0005886 The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.
  • GO:0005506 Binding to an iron (Fe) ion.
  • GO:0050136 Catalysis of the reaction: NADH + H+ + a quinone = NAD+ + a quinol.
  • GO:0048038 Binding to a quinone, any member of a class of diketones derivable from aromatic compounds by conversion of two CH groups into CO groups with any necessary rearrangement of double bonds.
  • GO:0009060 The enzymatic release of energy from inorganic and organic compounds (especially carbohydrates and fats) which requires oxygen as the terminal electron acceptor.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

22 records
Show feature table
Start End DB Term Name
48 80 ProSiteProfiles PS51379 4Fe-4S ferredoxin-type iron-sulfur binding domain profile.
48 80 InterPro IPR017896 4Fe-4S ferredoxin-type, iron-sulphur binding domain
12 142 PANTHER PTHR10849 NADH DEHYDROGENASE UBIQUINONE IRON-SULFUR PROTEIN 8, MITOCHONDRIAL
12 142 InterPro IPR010226 NADH-quinone oxidoreductase, chain I
90 119 ProSiteProfiles PS51379 4Fe-4S ferredoxin-type iron-sulfur binding domain profile.
90 119 InterPro IPR017896 4Fe-4S ferredoxin-type, iron-sulphur binding domain
33 153 SUPERFAMILY SSF54862 4Fe-4S ferredoxins
33 176 Gene3D G3DSA:3.30.70.3270 -
1 163 Hamap MF_01351 NAD(P)H-quinone oxidoreductase subunit I, chloroplastic [ndhI].
1 163 InterPro IPR010226 NADH-quinone oxidoreductase, chain I
60 71 ProSitePatterns PS00198 4Fe-4S ferredoxin-type iron-sulfur binding region signature.
60 71 InterPro IPR017900 4Fe-4S ferredoxin, iron-sulphur binding, conserved site
27 180 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
33 176 FunFam G3DSA:3.30.70.3270:FF:000002 NADH-quinone oxidoreductase subunit I
1 5 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
99 110 ProSitePatterns PS00198 4Fe-4S ferredoxin-type iron-sulfur binding region signature.
99 110 InterPro IPR017900 4Fe-4S ferredoxin, iron-sulphur binding, conserved site
6 26 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
16 137 NCBIfam TIGR01971 NADH-quinone oxidoreductase, chain I
16 137 InterPro IPR010226 NADH-quinone oxidoreductase, chain I
59 113 Pfam PF12838 4Fe-4S dicluster domain
59 113 InterPro IPR017896 4Fe-4S ferredoxin-type, iron-sulphur binding domain

3D structure

Selected loaded structure. Experimental PDB entries may cover only a portion of the sequence; AlphaFold DB and ColabFold models typically cover the full protein but remain computational predictions.

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Pocket score High Medium Low
How colors and pocket overlays are used
Uniform protein color marks the displayed model as a single molecular object.
Experimental PDB structures may be colored by chain to distinguish subunits or copies present in the file.
Pocket colors and alpha spheres are evidence overlays for predicted binding cavities; they are not alternative protein chains.
'Alpha spheres' is FPocket's own cavity-shape geometry, imported when available and aligned with the loaded structure.
'Pocket atoms'/'Predicted site atoms' show the pocket's residue atoms instead: P2Rank reports residues rather than alpha spheres, and FPocket falls back to this when alpha-sphere geometry is unavailable or doesn't align.
'No pocket geometry' means neither alpha spheres nor residue-position data could be found for that pocket; the layer just highlights the same residues as 'Nearby residues'.
Pocket details Inspect a specific pocket, or open the full viewer

Binding pockets · P2Rank

Druggability (P2Rank): high ≥ 0.5 · medium 0.2–0.49 · low < 0.2

Pocket 1 P2Rank #1
0.179
Show in viewer
Surrounding area
Pocket 2 P2Rank #2
0.078
Show in viewer
Surrounding area

Binding pockets · FPocket

Druggability (FPocket): high ≥ 0.7 · medium 0.4–0.69 · low < 0.4

Pocket 1 FPocket #4
0.372
Show in viewer
Surrounding area
Pocket 2 FPocket #2
0.321
Show in viewer
Surrounding area
Residue sets
UniProt: Binding site:102-102
UniProt: Binding site:105-105
UniProt: Binding site:109-109
UniProt: Binding site:60-60
UniProt: Binding site:63-63
UniProt: Binding site:66-66
UniProt: Binding site:70-70
UniProt: Binding site:99-99
All structural evidence 0 experimental · 2 predicted

Structural evidence

0 + 2

Experimental PDB entries plus predicted AlphaFold DB or ColabFold models. Click Switch to display a different loaded structure in the viewer.

Entry Method Resolution Chain Coverage Links Status
AlphaFold DB AF_A0A0H3GWA7
AlphaFold DB full sequence Viewing
ColabFold KP13_00986
ColabFold full sequence Loaded

Ligand evidence

Ligands grouped by evidence source. PDB ligands keep the source crystal visible, and loaded crystals can be opened directly in the structure viewer.

65 records
Chemistry signal

Structural ligand evidence is available for this target.

Direct evidence 0 same-protein records
Transferred evidence 15 records from similar proteins
Structural ligands 15 0 loaded crystals
Measured bioactivity 0 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
3PE PDB via homolog 748.1 Da · LogP 12.06 · TPSA 134.4 Open detail RCSB PDB
CDL PDB via homolog Detail RCSB PDB
DCQ PDB via homolog Detail RCSB PDB
EHZ PDB via homolog Detail RCSB PDB
FES PDB via homolog Detail RCSB PDB

Structural evidence inferred from similar proteins. The source crystal indicates where the ligand was observed; the UniProt column identifies the homologous protein carrying that ligand.

Show only:
Ligand Source crystal UniProt (homolog) MW · LogP · TPSA Lipinski PAINS SMILES
3PE RCSB PDB Q8K3J1 748.1 Da LogP 12.06 TPSA 134.4 2 viol. ✓ Clean CCCCCCCCCCCCCCCCCC(=O)OC[C@H](COP(=O)(O)OCCN)OC…
CDL RCSB PDB Q8K3J1 1464.1 Da LogP 23.31 TPSA 242.6 3 viol. ✓ Clean CCCCCCCCCCCCCCCCCC(=O)OC[C@H](COP(=O)([O-])OCC(…
DCQ RCSB PDB Q56224 322.4 Da LogP 4.49 TPSA 52.6 ✓ Ro5 Alert CCCCCCCCCCC1=C(C(=O)C(=C(C1=O)OC)OC)C
EHZ RCSB PDB Q8K3J1 584.7 Da LogP 3.04 TPSA 182.5 2 viol. ✓ Clean CCCCCCCCCCC[C@@H](CC(=O)SCCNC(=O)CCNC(=O)[C@@H]…
FES RCSB PDB A0A1S3VGS8 175.8 Da LogP 1.29 TPSA 0.0 ✓ Ro5 ✓ Clean S1[Fe]S[Fe]1
HQH RCSB PDB Q56224 415.6 Da LogP 5.05 TPSA 71.6 1 viol. ✓ Clean C/C=C(\C)/[C@@H]([C@H](C)/C=C(\C)/C=C/C/C(=C/CC…
HQK RCSB PDB Q56224 364.9 Da LogP 5.24 TPSA 34.9 1 viol. ✓ Clean CC(C)(C)c1ccc(cc1)CSC2=C(C(=O)N(N=C2)C(C)(C)C)Cl
HQW RCSB PDB Q56224 397.4 Da LogP 4.66 TPSA 91.8 ✓ Ro5 ✓ Clean CC1=C(OC(=C(C1=O)C)OC)[C@H]2C/C(=C/C(=C/c3ccc(c…
MYR RCSB PDB A0A6P3TFB2 228.4 Da LogP 4.77 TPSA 37.3 ✓ Ro5 ✓ Clean CCCCCCCCCCCCCC(=O)O
PC1 RCSB PDB P42028 790.2 Da LogP 12.17 TPSA 111.2 2 viol. ✓ Clean CCCCCCCCCCCCCCCCCC(=O)OC[C@H](CO[P@@](=O)([O-])…
PNS RCSB PDB P42028 358.4 Da LogP -0.96 TPSA 145.2 1 viol. ✓ Clean CC(C)(COP(=O)(O)O)[C@H](C(=O)NCCC(=O)NCCS)O
SMA RCSB PDB Q56224 514.7 Da LogP 6.14 TPSA 87.4 2 viol. ✓ Clean C/C=C(\C)/C=C/C=C[C@@H]([C@@H](C)[C@H]([C@@H](C…
UQ1 RCSB PDB Q56224 250.3 Da LogP 2.32 TPSA 52.6 ✓ Ro5 Alert CC1=C(C(=O)C(=C(C1=O)OC)OC)CC=C(C)C
UQ2 RCSB PDB P42028 318.4 Da LogP 4.04 TPSA 52.6 ✓ Ro5 Alert CC1=C(C(=O)C(=C(C1=O)OC)OC)C\C=C(/C)\CCC=C(C)C
ZMP RCSB PDB P42028 568.7 Da LogP 4.07 TPSA 162.3 1 viol. ✓ Clean CCCCCCCCCCCCCC(=O)SCCNC(=O)CCNC(=O)[C@H](C(C)(C…

PDB and ChEMBL records on this protein are shown in full. ChEMBL records from similar proteins are capped at the top 100 per protein (by pchembl) and ZINC at the top 50 (Tanimoto ≥ 0.5). ADME columns are descriptor-based screening flags, not experimental toxicity results.

Cross-references

External database identifiers for this protein, its structures, ligands, and metabolic reactions.