KpATCC43816 Protein target profile

NAD(P)H quinone oxidoreductase, PIG3 family protein

Accession: VK055_1250

Gene: AIK79873.1 3D evidence: AlphaFold DB model + ColabFold model Metabolism Not in network UniProt A0A0H3GRI3
Length 326
Pocket druggability (P2Rank · AlphaFold DB model) 0.916
Direct ligand evidence 0 165 total records
Functional annotation 0 EC 1 GO
Target summary

Promising target candidate with multiple supporting evidence streams.

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 (%)
41.667 Lower values reduce human off-target concern.
Human E-value
4.99e-14
Gut microbiome similarity
0.7% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

Essential (DEG)
N
DEG identity (%)
35.071 Higher values support similarity to known essential genes.

Structure confidence

ColabFold pLDDT
97.02 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) 0.916
Structure A0A0H3GRI3
Pocket Pocket 1
Druggability (FPocket) 0.84
Structure A0A0H3GRI3
Pocket Pocket 14
ColabFold model
P2Rank 0.929 · Pocket 1
FPocket 0.951 · Pocket 12
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 34 / 4744 genomes with a hit
Prevalence 0.7%

Metabolic context

Reactions catalyzed, pathway membership, and centrality in the genome-scale metabolic network.

This protein is not associated with the imported metabolic network for this genome.

Browse the genome's metabolic network

Imported from KpATCC43816.sbml · 2026-07-09

Sequence

Primary amino-acid sequence viewer.

MKYIAISQPGGPEVLQIREGEIPTIGEHEVLIEVKAAGVNRPDILQRQGLYPMPEGVTPVPGLEVAGVVVKVGAQVTAFTPGDRVCALTNGGGYAEYCAVPAGQTLPIPAGLSFSEAAAIPETFFTVWANVFQLGKLQPGESILVHGGASGIGTTAVLLCHALGMTVYATVGQDEKIAALRPYATAINYKTDDFAEKIGQLTNDEGVDVILDIVGGPYFNRNLGLLKKDGRLVIIGFMGGRIAHEVDIQTLMLKRATVTGSTMRGRTAAEKQQIAEALRRHVWPLLEAGKCKPLIYASYPMAEIAEAHACLDSGQHLGKVVITMTS

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

1 GO

Subcellular localization

Localization
Cytoplasmic

Gene Ontology (GO)

1
  • GO:0016491 Catalysis of an oxidation-reduction (redox) reaction, a reversible chemical reaction in which the oxidation state of an atom or atoms within a molecule is altered. One substrate acts as a hydrogen or electron donor and becomes oxidized, while the other acts as hydrogen or electron acceptor and becomes reduced.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

17 records
Show feature table
Start End DB Term Name
1 324 NCBIfam TIGR02824 putative NAD(P)H quinone oxidoreductase, PIG3 family
1 324 InterPro IPR014189 Quinone oxidoreductase PIG3
1 323 PANTHER PTHR48106 QUINONE OXIDOREDUCTASE PIG3-RELATED
120 261 Gene3D G3DSA:3.40.50.720 -
151 268 Pfam PF00107 Zinc-binding dehydrogenase
151 268 InterPro IPR013149 Alcohol dehydrogenase-like, C-terminal
12 322 Gene3D G3DSA:3.90.180.10 -
28 98 Pfam PF08240 Alcohol dehydrogenase GroES-like domain
28 98 InterPro IPR013154 Alcohol dehydrogenase-like, N-terminal
10 322 SMART SM00829 PKS_ER_names_mod
10 322 InterPro IPR020843 Polyketide synthase, enoylreductase domain
1 140 SUPERFAMILY SSF50129 GroES-like
1 140 InterPro IPR011032 GroES-like superfamily
1 322 CDD cd05276 p53_inducible_oxidoreductase
1 322 InterPro IPR014189 Quinone oxidoreductase PIG3
111 286 SUPERFAMILY SSF51735 NAD(P)-binding Rossmann-fold domains
111 286 InterPro IPR036291 NAD(P)-binding domain superfamily

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.

Download VMD script Full viewer

Loading 3D structure...

Drag to rotate — click the view, then scroll to zoom.

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
0.916
Likely same site as FPocket 14 2.2 Å 32 shared residues 89% of smaller site
Show in viewer
Surrounding area
Pocket 2 P2Rank #2
0.063
Show in viewer
Surrounding area
Pocket 3 P2Rank #3
0.021
Show in viewer
Surrounding area
Pocket 4 P2Rank #4
0.007
Show in viewer
Surrounding area

Binding pockets · FPocket

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

Pocket 1 FPocket #14
0.84 Unusual size
Likely same site as P2Rank 1 2.2 Å 32 shared residues 89% of smaller site
Show in viewer
Surrounding area
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_A0A0H3GRI3
AlphaFold DB full sequence Viewing
ColabFold VK055_1250
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.

165 records
Chemistry signal

Structural and bioactivity evidence are both available for this target.

Direct evidence 0 same-protein records
Transferred evidence 115 records from similar proteins
Structural ligands 15 0 loaded crystals
Measured bioactivity 100 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
1XX PDB via homolog 128.1 Da · LogP 0.76 · TPSA 46.5 Open detail RCSB PDB
2XX PDB via homolog Detail RCSB PDB
3XX PDB via homolog Detail RCSB PDB
4XX PDB via homolog Detail RCSB PDB
7FA 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
1XX RCSB PDB O23939 128.1 Da LogP 0.76 TPSA 46.5 ✓ Ro5 ✓ Clean C[C@@H]1C(=O)C(=C(O1)C)O
2XX RCSB PDB O23939 142.2 Da LogP 1.15 TPSA 46.5 ✓ Ro5 ✓ Clean CC[C@@H]1C(=O)C(=C(O1)C)O
3XX RCSB PDB O23939 140.1 Da LogP 1.28 TPSA 46.5 ✓ Ro5 ✓ Clean C/C=C/1\C(=O)C(=C(O1)C)O
4XX RCSB PDB O23939 114.1 Da LogP 0.38 TPSA 46.5 ✓ Ro5 ✓ Clean CC1=C(C(=O)CO1)O
7FA RCSB PDB P49327 344.5 Da LogP 7.38 TPSA 26.3 1 viol. ✓ Clean CCCCCC=CC/C=C\C/C=C\CCCCC[P@@](=O)(OC)F
BMD RCSB PDB P42328 87.1 Da LogP 0.27 TPSA 43.1 ✓ Ro5 ✓ Clean CCCC(=O)N
CAC RCSB PDB P49327 137.0 Da LogP -0.52 TPSA 40.1 ✓ Ro5 ✓ Clean C[As](=O)(C)[O-]
CO8 RCSB PDB F0V3Z3 893.7 Da LogP 1.03 TPSA 363.6 3 viol. ✓ Clean CCCCCCCC(=O)SCCNC(=O)CCNC(=O)[C@@H](C(C)(C)CO[P…
DH9 RCSB PDB P49327 513.8 Da LogP 6.40 TPSA 112.9 2 viol. ✓ Clean CCCCCCCCCCC[C@@H](C[C@@H]([C@H](CCCCCC)C(=O)O)O…
DIF RCSB PDB Q8N4Q0 296.2 Da LogP 4.36 TPSA 49.3 ✓ Ro5 ✓ Clean c1ccc(c(c1)CC(=O)O)Nc2c(cccc2Cl)Cl
DTT RCSB PDB P49327 154.3 Da LogP -0.43 TPSA 40.5 ✓ Ro5 ✓ Clean C([C@@H]([C@H](CS)O)O)S
ETF RCSB PDB P42328 100.0 Da LogP 0.54 TPSA 20.2 ✓ Ro5 ✓ Clean C(C(F)(F)F)O
TCL RCSB PDB P49327 289.5 Da LogP 5.14 TPSA 29.5 1 viol. ✓ Clean c1cc(c(cc1Cl)O)Oc2ccc(cc2Cl)Cl
X1H RCSB PDB Q8N4Q0 376.4 Da LogP 5.22 TPSA 66.8 1 viol. ✓ Clean COc1ccc(cc1)C(=O)c2c3ccc(cc3sc2c4ccc(cc4)O)O
ZEP RCSB PDB P49327 404.5 Da LogP 4.57 TPSA 50.3 ✓ Ro5 ✓ Clean CCN(CC)S(=O)(=O)c1ccc(cc1)c2csc(n2)Cc3ccccc3F

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.

Chemistry

ChEMBL CHEMBL3623457 ChEMBL CHEMBL3646811 ChEMBL CHEMBL3646807 ChEMBL CHEMBL3646804 ChEMBL 2W4 ChEMBL CHEMBL3623458 ChEMBL CHEMBL4450081 ChEMBL CHEMBL4462401 ChEMBL CHEMBL4553437 ChEMBL CHEMBL4440024 ChEMBL CHEMBL3623459 ChEMBL CHEMBL3646805 ChEMBL CHEMBL3646808 ChEMBL CHEMBL4529391 ChEMBL CHEMBL3623456 ChEMBL CHEMBL3646803 ChEMBL CHEMBL4126247 ChEMBL CHEMBL4127623 ChEMBL CHEMBL5802102 ChEMBL CHEMBL4129012 ChEMBL CHEMBL4127804 ChEMBL CHEMBL4127964 ChEMBL CHEMBL4575847 ChEMBL CHEMBL4125752 ChEMBL CHEMBL4128143 ChEMBL CHEMBL5822742 ChEMBL 4XN ChEMBL CHEMBL3617746 ChEMBL CHEMBL5824348 ChEMBL CHEMBL4129575 ChEMBL CHEMBL4518496 ChEMBL CHEMBL4129431 ChEMBL CHEMBL4466578 ChEMBL CHEMBL5867199 ChEMBL CHEMBL5957211 ChEMBL CHEMBL5922011 ChEMBL CHEMBL6003285 ChEMBL CHEMBL5788711 ChEMBL CHEMBL4126768 ChEMBL CHEMBL3646810 ChEMBL CHEMBL5985038 ChEMBL CHEMBL3623462 ChEMBL CHEMBL4126984 ChEMBL CHEMBL5827707 ChEMBL CHEMBL4126126 ChEMBL CHEMBL5760930 ChEMBL CHEMBL6034162 ChEMBL CHEMBL6049457 ChEMBL CHEMBL4126304 ChEMBL CHEMBL5974575 ChEMBL CHEMBL5977971 ChEMBL CHEMBL3617741 ChEMBL CHEMBL4129046 ChEMBL CHEMBL4127608 ChEMBL CHEMBL6032013 ChEMBL CHEMBL5839177 ChEMBL KUA ChEMBL CHEMBL5749984 ChEMBL CHEMBL5855781 ChEMBL CHEMBL5876718 ChEMBL CHEMBL5969695 ChEMBL CHEMBL5997576 ChEMBL CHEMBL3617742 ChEMBL CHEMBL4570684 ChEMBL CHEMBL5858978 ChEMBL CHEMBL5870379 ChEMBL CHEMBL4445590 ChEMBL CHEMBL5943600 ChEMBL CHEMBL6030711 ChEMBL CHEMBL5863279 ChEMBL CHEMBL6035580 ChEMBL CHEMBL5881362 ChEMBL CHEMBL4127027 ChEMBL CHEMBL4575998 ChEMBL CHEMBL6039031 ChEMBL CHEMBL6058681 ChEMBL CHEMBL6051120 ChEMBL CHEMBL5750822 ChEMBL CHEMBL1834184 ChEMBL CHEMBL4129242 ChEMBL CHEMBL5929854 ChEMBL CHEMBL5990353 ChEMBL CHEMBL5976657 ChEMBL CHEMBL4129240 ChEMBL CHEMBL5860543 ChEMBL CHEMBL4565279 ChEMBL CHEMBL5802991 ChEMBL CHEMBL5923558 ChEMBL CHEMBL3617744 ChEMBL CHEMBL5892433 ChEMBL CHEMBL4440104 ChEMBL CHEMBL5798983 ChEMBL CHEMBL5788930 ChEMBL CHEMBL5829181 ChEMBL CHEMBL4454062 ChEMBL CHEMBL4457855 ChEMBL CHEMBL5917086 ChEMBL CHEMBL5865379 ChEMBL CHEMBL4126572 ChEMBL CHEMBL5768401