KpATCC43816 Protein target profile

3-oxoacyl-[acyl-carrier-] synthase III family protein

Accession: VK055_1376

Gene: AIK79999.1 fabH 3D evidence: AlphaFold DB model + ColabFold model Metabolism 1 reaction UniProt A0A0H3GRH3
Length 317
Pocket druggability (P2Rank · AlphaFold DB model) 0.84
Metabolic reactions 1
Chokepoint No
Direct ligand evidence 0 87 total records
Functional annotation 0 EC 3 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
No hit
Gut microbiome similarity
3.9% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

Essential (DEG)
Y
DEG identity (%)
90.221 Higher values support similarity to known essential genes.
DEG E-value
0.0 Smaller values mean stronger essential-gene similarity.

Structure confidence

ColabFold pLDDT
98.47 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) 0.84
Structure A0A0H3GRH3
Pocket Pocket 1
Druggability (FPocket) 0.217
Structure A0A0H3GRH3
Pocket Pocket 2
ColabFold model
P2Rank 0.85 · Pocket 1
FPocket 0.737 · Pocket 1
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 185 / 4744 genomes with a hit
Prevalence 3.9%

Metabolic context

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

Explore metabolic network

Metabolic context: more central than 92.4% of genes in this genome, no human homolog detected.

Relative network centrality 92.4% more central than 92.4% of genes in this genome
Chokepoint Not a chokepoint
Catalyzed reaction

1 reaction mapped to this gene in the metabolic model. Open the full network to see each one, with substrates/products and the reaction-reaction map.

Imported from KpATCC43816.sbml · 2026-07-09

Sequence

Primary amino-acid sequence viewer.

MYTKIIGTGSYLPEQVRTNADLEKMVETSDEWIVTRTGIRERRIAAAHETVATMGFEAAKQALAMAGVSAEQIGLIIVATTSGTHAFPSSACQIQSMLGVKGCPAFDVAAACAGFTYALSVADQYVKNGAVDYALVVGADVLARTCDPADRGTIIIFGDGAGAVVLGASEEPGIISTHLHADGSYGELLTLPNADRVDPENPIYLTMAGNEVFKVAVTELAHIVDETLAANNLERSALDWLVPHQANLRIISATAKKLGMSMDNVVVTLDRHGNTSAASVPCALDEAVRDGRIQRGQLILLEAFGGGFTWGSALVRF

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

3 GO

Subcellular localization

Localization
Cytoplasmic

Gene Ontology (GO)

3
  • GO:0004315 Catalysis of the reaction: acyl-[acyl-carrier protein] + malonyl-[acyl-carrier protein] = 3-oxoacyl-[acyl-carrier protein] + CO2 + [acyl-carrier protein].
  • GO:0006633 The chemical reactions and pathways resulting in the formation of a fatty acid, any of the aliphatic monocarboxylic acids that can be liberated by hydrolysis from naturally occurring fats and oils. Fatty acids are predominantly straight-chain acids of 4 to 24 carbon atoms, which may be saturated or unsaturated; branched fatty acids and hydroxy fatty acids also occur, and very long chain acids of over 30 carbons are found in waxes.
  • GO:0016746 Catalysis of the transfer of an acyl group from one compound (donor) to another (acceptor).

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

14 records
Show feature table
Start End DB Term Name
1 317 Gene3D G3DSA:3.40.47.10 -
1 317 InterPro IPR016039 Thiolase-like
1 317 Hamap MF_01815 Beta-ketoacyl-[acyl-carrier-protein] synthase III [fabH].
1 317 InterPro IPR004655 Beta-ketoacyl-[acyl-carrier-protein] synthase III
1 317 FunFam G3DSA:3.40.47.10:FF:000004 3-oxoacyl-[acyl-carrier-protein] synthase 3
2 316 PANTHER PTHR43091 3-OXOACYL-[ACYL-CARRIER-PROTEIN] SYNTHASE
2 315 CDD cd00830 KAS_III
228 316 Pfam PF08541 3-Oxoacyl-[acyl-carrier-protein (ACP)] synthase III C terminal
228 316 InterPro IPR013747 Beta-ketoacyl-[acyl-carrier-protein] synthase III, C-terminal
3 317 SUPERFAMILY SSF53901 Thiolase-like
3 317 InterPro IPR016039 Thiolase-like
106 183 Pfam PF08545 3-Oxoacyl-[acyl-carrier-protein (ACP)] synthase III
106 183 InterPro IPR013751 Beta-ketoacyl-[acyl-carrier-protein] synthase III, N-terminal
1 317 NCBIfam TIGR00747 beta-ketoacyl-ACP synthase III

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...

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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
0.84
Likely same site as FPocket 2 2.0 Å 23 shared residues 96% of smaller site
Show in viewer
Surrounding area
Pocket 2 P2Rank #2
0.505
Show in viewer
Surrounding area

Binding pockets · FPocket

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

Pocket 1 FPocket #2
0.217 Unusual size
Likely same site as P2Rank 1 2.0 Å 23 shared residues 96% of smaller site
Show in viewer
Surrounding area
Residue sets
UniProt: Active site:112-112
UniProt: Active site:244-244
UniProt: Active site:274-274
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_A0A0H3GRH3
AlphaFold DB full sequence Viewing
ColabFold VK055_1376
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.

87 records
Chemistry signal

Structural and bioactivity evidence are both available for this target.

Direct evidence 0 same-protein records
Transferred evidence 37 records from similar proteins
Structural ligands 15 0 loaded crystals
Measured bioactivity 22 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
4LB PDB via homolog 325.8 Da · LogP 3.46 · TPSA 75.6 Open detail RCSB PDB
4VK PDB via homolog Detail RCSB PDB
4VL PDB via homolog Detail RCSB PDB
4VM PDB via homolog Detail RCSB PDB
4VN 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
4LB RCSB PDB P0A6R0 325.8 Da LogP 3.46 TPSA 75.6 ✓ Ro5 ✓ Clean c1ccc(c(c1)COC(=O)NCC2CCC(CC2)C(=O)O)Cl
4VK RCSB PDB P0A6R0 353.4 Da LogP 3.32 TPSA 66.4 ✓ Ro5 ✓ Clean c1ccc(cc1)S(=O)(=O)NCc2ccc(cc2)c3cccc(c3)CO
4VL RCSB PDB P0A6R0 330.4 Da LogP 2.68 TPSA 73.7 ✓ Ro5 ✓ Clean c1cc(c(cc1CO)c2ccc(nc2)N3CCC(CC3)C(=O)O)F
4VM RCSB PDB P0A6R0 470.5 Da LogP 4.46 TPSA 78.4 ✓ Ro5 ✓ Clean c1cc2cc(ccc2nc1)CNC(=O)C3CCN(CC3)c4ccc(cn4)c5cc…
4VN RCSB PDB C1CIR8 346.8 Da LogP 3.20 TPSA 73.7 ✓ Ro5 ✓ Clean c1cc(c(cc1CO)c2ccc(nc2)N3CCC(CC3)C(=O)O)Cl
669 RCSB PDB P0A6R0 450.3 Da LogP 5.87 TPSA 88.8 1 viol. ✓ Clean c1cc(c(c(c1)Cl)COc2ccc3c(c2)cc(n3CCCCCC(=O)O)C(…
B82 RCSB PDB Q820T1 455.3 Da LogP 3.43 TPSA 103.8 ✓ Ro5 ✓ Clean CCN(CC)S(=O)(=O)c1cc(ccc1Br)C(=O)Nc2ccccc2C(=O)O
B83 RCSB PDB Q820T1 444.5 Da LogP 5.91 TPSA 78.9 1 viol. ✓ Clean C[C@@H]1C[C@@H](CN(C1)c2ccc(cc2Oc3ccccc3)C(=O)N…
CO8 RCSB PDB Q9KLJ3 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…
MEE RCSB PDB P0A6R0 48.1 Da LogP 0.55 TPSA 0.0 ✓ Ro5 ✓ Clean CS
MLC RCSB PDB P0A6R0 853.6 Da LogP -1.86 TPSA 400.9 3 viol. ✓ Clean CC(C)(CO[P@@](=O)(O)O[P@@](=O)(O)OC[C@@H]1[C@H]…
MLI RCSB PDB Q9KLJ3 102.0 Da LogP -3.12 TPSA 80.3 ✓ Ro5 ✓ Clean C(C(=O)[O-])C(=O)[O-]
OAX RCSB PDB A7X0K2 266.7 Da LogP 1.90 TPSA 49.4 ✓ Ro5 ✓ Clean c1cc(ccc1C(=O)NCN(CC2CC2)C=O)Cl
OCA RCSB PDB Q9KLJ3 144.2 Da LogP 2.43 TPSA 37.3 ✓ Ro5 ✓ Clean CCCCCCCC(=O)O
UT7 RCSB PDB P0A6R0 751.5 Da LogP -2.60 TPSA 366.8 3 viol. ✓ Clean CC(C)(COP(=O)(O)OP(=O)(O)OC[C@@H]1[C@H]([C@H]([…

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.