KpKP13 Protein target profile

Long-chain-fatty-acid--CoA ligase

Accession: KP13_31515

Gene: fadD AHE43908.1 3D evidence: AlphaFold DB model + ColabFold model UniProt A0A0H3GRT5
Length 572
Pocket druggability (P2Rank · AlphaFold DB model) 0.808
Direct ligand evidence 0 62 total records
Functional annotation 0 EC 0 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 (%)
42.0 Lower values reduce human off-target concern.
Human E-value
2.88e-07
Gut microbiome similarity
5.3% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

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

Structure confidence

ColabFold pLDDT
92.03 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) 0.808
Structure A0A0H3GRT5
Pocket Pocket 1
Druggability (FPocket) 0.217
Structure A0A0H3GRT5
Pocket Pocket 27
ColabFold model
P2Rank 0.982 · Pocket 1
FPocket 0.624 · Pocket 31
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 253 / 4744 genomes with a hit
Prevalence 5.3%

Sequence

Primary amino-acid sequence viewer.

MTTNNYFRGDAVKKVWLNRYPADVPAEINPDRYQSLVELFEHATTRYADQPAFINMGEVMTYRKLEERSRAFAAYLQEGLGLQKGDRVALMMPNLLQYPVALFGILRAGMIVVNVNPLYTPRELEHQLNDSGAAAIVIVSNFAHTLEKVVAKTQVQHVILTRMGDQLSTAKGTLVNFVVKYIKRLVPKYHLPDAISFRSALQHGYRMQYVKPEIVAEDLAFLQYTGGTTGVAKGAMLTHRNMLANLEQVNATYGPLLHRGKEFVVTALPLYHIFALTMNCLLFIELGGQNLLITNPRDIPGLVKELAKYPFTAMTGVNTLFNALLNNKEFQQLDFSSLHLSAGGGMPVQQAVAERWVKLTGQYLLEGYGLTECSPLVSVNPHDIDYHSGSIGLPVPSTEAKLVDDDDNEVAPGQPGELCIKGPQVMLGYWQRPDATDEIIKDGWLHTGDIAVMDEEGFLRIVDRKKDMILVSGFNVYPNEIEDVVMQHSGVLEVAAIGVPSGSSGEAVKIFVVKKDAALTEEALITFCRRHLTGYKVPKLVEFRDELPKSNVGKILRRELRDEARAKVDNKG

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

Subcellular localization

Localization
Cytoplasmic

No GO or EC annotations are currently loaded for this protein.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

15 records
Show feature table
Start End DB Term Name
467 569 Gene3D G3DSA:3.30.300.30 -
467 569 InterPro IPR045851 AMP-binding enzyme, C-terminal domain superfamily
466 567 FunFam G3DSA:3.30.300.30:FF:000006 Long-chain-fatty-acid--CoA ligase FadD
22 466 Gene3D G3DSA:3.40.50.12780 -
22 466 InterPro IPR042099 ANL, N-terminal domain
21 466 FunFam G3DSA:3.40.50.12780:FF:000003 Long-chain-fatty-acid--CoA ligase FadD
222 233 ProSitePatterns PS00455 Putative AMP-binding domain signature.
222 233 InterPro IPR020845 AMP-binding, conserved site
36 561 CDD cd05936 FC-FACS_FadD_like
480 554 Pfam PF13193 AMP-binding enzyme C-terminal domain
480 554 InterPro IPR025110 AMP-binding enzyme, C-terminal domain
28 566 PANTHER PTHR43767 LONG-CHAIN-FATTY-ACID--COA LIGASE
40 471 Pfam PF00501 AMP-binding enzyme
40 471 InterPro IPR000873 AMP-dependent synthetase/ligase domain
22 566 SUPERFAMILY SSF56801 Acetyl-CoA synthetase-like

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

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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
0.808
Show in viewer
Surrounding area
Pocket 2 P2Rank #2
0.249
Show in viewer
Surrounding area
Pocket 3 P2Rank #3
0.223
Show in viewer
Surrounding area
Pocket 4 P2Rank #4
0.078
Show in viewer
Surrounding area
Pocket 5 P2Rank #5
0.044
Show in viewer
Surrounding area

Binding pockets · FPocket

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

Pocket 1 FPocket #27
0.217
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_A0A0H3GRT5
AlphaFold DB full sequence Viewing
ColabFold KP13_31515
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.

62 records
Chemistry signal

Structural ligand evidence is available for this target.

Direct evidence 0 same-protein records
Transferred evidence 12 records from similar proteins
Structural ligands 12 0 loaded crystals
Measured bioactivity 0 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
3SK PDB via homolog 136.2 Da · LogP 1.69 · TPSA 37.3 Open detail RCSB PDB
3U4 PDB via homolog Detail RCSB PDB
3UK PDB via homolog Detail RCSB PDB
4MA PDB via homolog Detail RCSB PDB
4UU 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
3SK RCSB PDB Q93TK0 136.2 Da LogP 1.69 TPSA 37.3 ✓ Ro5 ✓ Clean Cc1ccccc1C(=O)O
3U4 RCSB PDB Q93TK0 140.1 Da LogP 1.52 TPSA 37.3 ✓ Ro5 ✓ Clean c1ccc(c(c1)C(=O)O)F
3UK RCSB PDB F3Y661 466.3 Da LogP -0.42 TPSA 218.2 1 viol. ✓ Clean c1ccc(c(c1)C(=O)OP(=O)(O)OC[C@@H]2[C@H]([C@H]([…
4MA RCSB PDB Q93TK0 136.2 Da LogP 1.69 TPSA 37.3 ✓ Ro5 ✓ Clean Cc1ccc(cc1)C(=O)O
4UU RCSB PDB O24146 493.4 Da LogP -0.30 TPSA 209.2 1 viol. ✓ Clean c1nc(c2c(n1)n(cn2)[C@H]3[C@@H]([C@@H]([C@H](O3)…
4UV RCSB PDB O24146 507.4 Da LogP -1.12 TPSA 226.3 2 viol. Alert c1nc(c2c(n1)n(cn2)[C@H]3[C@@H]([C@@H]([C@H](O3)…
4UW RCSB PDB O24146 523.4 Da LogP -0.33 TPSA 218.4 2 viol. ✓ Clean COC1=CC(=CCC1=O)/C=C/C(=O)OP(=O)(O)OC[C@@H]2[C@…
AYL RCSB PDB Q941M3 481.4 Da LogP 0.50 TPSA 195.3 1 viol. ✓ Clean c1cc(ccc1CCCO[P@](=O)(O)OC[C@@H]2[C@H]([C@H]([C…
BEZ RCSB PDB Q93TK0 122.1 Da LogP 1.38 TPSA 37.3 ✓ Ro5 ✓ Clean c1ccc(cc1)C(=O)O
FOA RCSB PDB Q93TK0 112.1 Da LogP 0.98 TPSA 50.4 ✓ Ro5 ✓ Clean c1cc(oc1)C(=O)O
JSA RCSB PDB P9WQ37 530.6 Da LogP 1.12 TPSA 194.9 2 viol. ✓ Clean CCCCCCCCCCC[C@H](NS(=O)(=O)OC[C@@H]1[C@H]([C@H]…
MLI RCSB PDB P9WQ37 102.0 Da LogP -3.12 TPSA 80.3 ✓ Ro5 ✓ Clean C(C(=O)[O-])C(=O)[O-]

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.