Strong target candidate with converging metabolic, structural and chemical evidence.
Automated synthesis of the evidence currently loaded. Review the underlying records before prioritizing this protein.
Main supporting evidence
Risks to review
Evidence coverage
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 (%)
- 33.753 Lower values reduce human off-target concern.
- Human E-value
- 1.3499999999999998e-54
- Gut microbiome similarity
- 2.6% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.
Essentiality
- Essential (DEG)
- N
- DEG identity (%)
- 38.542 Higher values support similarity to known essential genes.
Structure confidence
- ColabFold pLDDT
- 96.27 0-100 confidence; >70 supports local structural interpretation.
Binding-site evidence
AlphaFold DB / UniProt modelP2Rank'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.
Sequence
Primary amino-acid sequence viewer.
MTEATSELVIWRNGRLATLNPDHAQPYGLLERHALLVRDGRIVAIVAEDDVPSGRSIDLEGRLVTPGLIDCHTHLVFGGSRAQEWEQRLNGVSYQTISASGGGINSTVRATRDSSEAELLALAQPRLERLLREGVTTLEIKSGYGLDLPNERKMLRVARQLADHNGVELSATLLSAHATPPEYQGDANGYITLVCETILPTLWQEGLFESVDVFCENVGFSPQQTERVFQAAQALGIPVKGHVEQLSSLGGAQLVSRYHGLSADHIEYLTEEGVAAMRESGTVAALLPGAFYFLNETRKPPVELLRKYQVPMAVATDFNPGTSPFASLHLAMNMACVKFGLTPEEAWAGVTRHAARALGRQASHGQLAPGFVANFAIWDAEHPVEMVYEPGRSPLWHRVVQGELQ
Functional annotations
Enzyme classification and Gene Ontology terms linked to this protein.
Subcellular localization
- Localization
- Cytoplasmic
Enzyme Commission (EC)
1Gene Ontology (GO)
9- GO:0016810 Catalysis of the hydrolysis of any carbon-nitrogen bond, C-N, with the exception of peptide bonds.
- GO:0019556 OBSOLETE. The chemical reactions and pathways resulting in the breakdown of L-histidine into other compounds, including glutamate and formamide.
- GO:0016787 Catalysis of the hydrolysis of various bonds, e.g. C-O, C-N, C-C, phosphoric anhydride bonds, etc.
- GO:0016812 Catalysis of the hydrolysis of any non-peptide carbon-nitrogen bond in a cyclic amide.
- GO:0005737 The contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
- GO:0050480 Catalysis of the reaction: (S)-3-(4-oxo-4,5-dihydro-1H-imidazol-5-yl)propanoic acid + H2O = N-formimidoyl-L-glutamate + H+.
- GO:0005506 Binding to an iron (Fe) ion.
- GO:0008270 Binding to a zinc ion (Zn).
- GO:0019557 OBSOLETE. The chemical reactions and pathways resulting in the breakdown of L-histidine into other compounds, including glutamate and formate.
Sequence domains and features
Domain and signature matches imported from InterPro and related databases.
Show feature table
| Start | End | DB | Term | Name |
|---|---|---|---|---|
| 67 | 365 | FunFam | G3DSA:3.20.20.140:FF:000007 | Imidazolonepropionase |
| 66 | 365 | SUPERFAMILY | SSF51556 | Metallo-dependent hydrolases |
| 66 | 365 | InterPro | IPR032466 | Metal-dependent hydrolase |
| 35 | 391 | CDD | cd01296 | Imidazolone-5PH |
| 35 | 391 | InterPro | IPR005920 | Imidazolonepropionase |
| 14 | 402 | Gene3D | G3DSA:2.30.40.10 | Urease, subunit C, domain 1 |
| 14 | 402 | InterPro | IPR011059 | Metal-dependent hydrolase, composite domain superfamily |
| 5 | 403 | PANTHER | PTHR42752 | IMIDAZOLONEPROPIONASE |
| 5 | 403 | InterPro | IPR005920 | Imidazolonepropionase |
| 7 | 405 | Hamap | MF_00372 | Imidazolonepropionase [hutI]. |
| 7 | 405 | InterPro | IPR005920 | Imidazolonepropionase |
| 9 | 404 | SUPERFAMILY | SSF51338 | Composite domain of metallo-dependent hydrolases |
| 9 | 404 | InterPro | IPR011059 | Metal-dependent hydrolase, composite domain superfamily |
| 63 | 383 | Pfam | PF01979 | Amidohydrolase family |
| 63 | 383 | InterPro | IPR006680 | Amidohydrolase-related |
| 31 | 403 | NCBIfam | TIGR01224 | imidazolonepropionase |
| 31 | 403 | InterPro | IPR005920 | Imidazolonepropionase |
| 67 | 365 | Gene3D | G3DSA:3.20.20.140 | - |
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.
How colors and pocket overlays are used
Pocket details Inspect a specific pocket, or open the full viewer
- Method
- -
- Score
- -
- Visible layer
- -
- Residues
- -
- Pocket properties
- -
Selecting a pocket opens its details and centers the viewer without clearing other active layers. Use Focus this pocket when you want to hide the rest; use Surface for the wider residue environment.
Binding pockets · P2Rank
Druggability (P2Rank): high ≥ 0.5 · medium 0.2–0.49 · low < 0.2
Binding pockets · FPocket
Druggability (FPocket): high ≥ 0.7 · medium 0.4–0.69 · low < 0.4
Residue sets
Binding pockets · P2Rank
Druggability (P2Rank): high ≥ 0.5 · medium 0.2–0.49 · low < 0.2
Binding pockets · FPocket
Druggability (FPocket): high ≥ 0.7 · medium 0.4–0.69 · low < 0.4
Residue sets
All structural evidence
Structural evidence
0 + 2Experimental 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_A0A0H3GQF7
|
AlphaFold DB | — | — | full sequence | — | Viewing |
|
ColabFold
VK055_1739
|
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.
Structural ligand evidence is available for this target.
Highest-confidence structural evidence: ligands co-crystallized with this exact protein. If the source PDB is loaded in Target, use Open crystal to inspect it in the structure viewer.
No PDB structure with a co-crystallized ligand found for this exact protein.
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.
| Ligand | Source crystal | UniProt (homolog) | MW · LogP · TPSA | Lipinski | PAINS | SMILES |
|---|---|---|---|---|---|---|
| DI6 RCSB PDB | A0KF84 | 172.1 Da LogP -0.94 TPSA 95.5 | ✓ Ro5 | ✓ Clean |
C(CC(=O)O)[C@H]1C(=O)NC(=O)N1
|
|
| IZC RCSB PDB | P42084 | 126.1 Da LogP -0.06 TPSA 62.0 | ✓ Ro5 | ✓ Clean |
C1N=CC(=N1)CC(=O)O
|
|
| NIG RCSB PDB | Q8U8Z6 | 174.2 Da LogP -0.50 TPSA 110.5 | ✓ Ro5 | ✓ Clean |
[H]/N=C\N[C@@H](CCC(=O)O)C(=O)O
|
Experimental bioactivity from ChEMBL measured directly on this protein. Score = pchembl (−log Ki/IC₅₀; higher = more potent).
No ChEMBL bioactivity data found for this exact protein.
Bioactivity inferred from similar proteins in ChEMBL. Score = pchembl (−log Ki/IC₅₀; higher = more potent).
No ChEMBL hits found through similar proteins.
Proposed virtual-screening candidates from ZINC. Score = Tanimoto similarity to a known binder (0–1; higher = more similar).
| Ligand | Tanimoto | MW · LogP · TPSA | Lipinski | PAINS | SMILES |
|---|---|---|---|---|---|
| ZINC116840878 ZINC | 0.704 | 258.2 Da LogP -1.30 TPSA 132.8 | ✓ Ro5 | ✓ Clean |
O=C(O)CC[C@@H]1NC(=O)[C@@H](CCC(=O)O)NC1=O
|
| ZINC2560884 ZINC | 0.704 | 258.2 Da LogP -1.30 TPSA 132.8 | ✓ Ro5 | ✓ Clean |
O=C(O)CC[C@H]1NC(=O)[C@@H](CCC(=O)O)NC1=O
|
| ZINC4899712 ZINC | 0.704 | 258.2 Da LogP -1.30 TPSA 132.8 | ✓ Ro5 | ✓ Clean |
O=C(O)CC[C@@H]1NC(=O)[C@H](CCC(=O)O)NC1=O
|
| ZINC3208092 ZINC | 0.655 | 200.2 Da LogP -1.17 TPSA 112.6 | ✓ Ro5 | ✓ Clean |
O=C(O)CCC1C(=O)NC(=O)NC1=O
|
| ZINC22215812 ZINC | 0.600 | 220.2 Da LogP 1.28 TPSA 78.4 | ✓ Ro5 | ✓ Clean |
O=C(O)CC[C@@H]1Nc2ccccc2NC1=O
|
| ZINC22215815 ZINC | 0.600 | 220.2 Da LogP 1.28 TPSA 78.4 | ✓ Ro5 | ✓ Clean |
O=C(O)CC[C@H]1Nc2ccccc2NC1=O
|
| ZINC8076668 ZINC | 0.576 | 200.2 Da LogP -1.15 TPSA 95.5 | ✓ Ro5 | ✓ Clean |
C[C@@H]1NC(=O)[C@H](CCC(=O)O)NC1=O
|
| ZINC1116258333 ZINC | 0.568 | 253.3 Da LogP 0.37 TPSA 78.5 | ✓ Ro5 | ✓ Clean |
C[C@H]1CC[C@@H](C)N1C(=O)CC[C@@H]1NC(=O)NC1=O
|
| ZINC32843863 ZINC | 0.568 | 267.3 Da LogP 0.77 TPSA 78.5 | ✓ Ro5 | ✓ Clean |
O=C1NC(=O)[C@H](CCC(=O)N2CCCCCCC2)N1
|
| ZINC32843864 ZINC | 0.568 | 267.3 Da LogP 0.77 TPSA 78.5 | ✓ Ro5 | ✓ Clean |
O=C1NC(=O)[C@@H](CCC(=O)N2CCCCCCC2)N1
|
| ZINC46463395 ZINC | 0.568 | 253.3 Da LogP 0.38 TPSA 78.5 | ✓ Ro5 | ✓ Clean |
O=C1NC(=O)[C@H](CCC(=O)N2CCCCCC2)N1
|
| ZINC14141965 ZINC | 0.553 | 267.3 Da LogP 0.81 TPSA 87.3 | ✓ Ro5 | ✓ Clean |
O=C(CC[C@@H]1NC(=O)NC1=O)NC1CCCCCC1
|
| ZINC14141966 ZINC | 0.553 | 267.3 Da LogP 0.81 TPSA 87.3 | ✓ Ro5 | ✓ Clean |
O=C(CC[C@H]1NC(=O)NC1=O)NC1CCCCCC1
|
| ZINC952984289 ZINC | 0.553 | 257.3 Da LogP -0.06 TPSA 78.5 | ✓ Ro5 | ✓ Clean |
O=C1NC(=O)[C@H](CCC(=O)N2CCC(F)CC2)N1
|
| ZINC220160890 ZINC | 0.543 | 242.3 Da LogP -0.12 TPSA 95.5 | ✓ Ro5 | ✓ Clean |
CC(C)C[C@H]1NC(=O)[C@@H](CCC(=O)O)NC1=O
|
| ZINC220160960 ZINC | 0.543 | 242.3 Da LogP -0.12 TPSA 95.5 | ✓ Ro5 | ✓ Clean |
CC(C)C[C@@H]1NC(=O)[C@@H](CCC(=O)O)NC1=O
|
| ZINC220161024 ZINC | 0.543 | 242.3 Da LogP -0.12 TPSA 95.5 | ✓ Ro5 | ✓ Clean |
CC(C)C[C@H]1NC(=O)[C@H](CCC(=O)O)NC1=O
|
| ZINC35079158 ZINC | 0.543 | 242.3 Da LogP -0.12 TPSA 95.5 | ✓ Ro5 | ✓ Clean |
CC(C)C[C@@H]1NC(=O)[C@H](CCC(=O)O)NC1=O
|
| ZINC2161326 ZINC | 0.538 | 248.2 Da LogP 0.60 TPSA 95.5 | ✓ Ro5 | ✓ Clean |
O=C(O)CC[C@@H]1NC(=O)c2ccccc2NC1=O
|
| ZINC49215456 ZINC | 0.538 | 257.3 Da LogP -0.45 TPSA 78.5 | ✓ Ro5 | ✓ Clean |
O=C1NC(=O)[C@H](CCC(=O)N2CCSCC2)N1
|
| ZINC580072 ZINC | 0.538 | 248.2 Da LogP 0.60 TPSA 95.5 | ✓ Ro5 | ✓ Clean |
O=C(O)CC[C@H]1NC(=O)c2ccccc2NC1=O
|
| ZINC585079693 ZINC | 0.538 | 281.4 Da LogP 0.77 TPSA 87.3 | ✓ Ro5 | ✓ Clean |
CC1(C)C(CNC(=O)CC[C@H]2NC(=O)NC2=O)C1(C)C
|
| ZINC585079694 ZINC | 0.538 | 281.4 Da LogP 0.77 TPSA 87.3 | ✓ Ro5 | ✓ Clean |
CC1(C)C(CNC(=O)CC[C@@H]2NC(=O)NC2=O)C1(C)C
|
| ZINC642014463 ZINC | 0.537 | 337.4 Da LogP 1.88 TPSA 87.3 | ✓ Ro5 | ✓ Clean |
O=C(CC[C@@H]1NC(=O)NC1=O)NC(c1ccccc1)c1ccccc1
|
| ZINC33023504 ZINC | 0.525 | 281.7 Da LogP 1.27 TPSA 87.3 | ✓ Ro5 | ✓ Clean |
O=C(CC[C@@H]1NC(=O)NC1=O)Nc1ccc(Cl)cc1
|
| ZINC33023506 ZINC | 0.525 | 281.7 Da LogP 1.27 TPSA 87.3 | ✓ Ro5 | ✓ Clean |
O=C(CC[C@H]1NC(=O)NC1=O)Nc1ccc(Cl)cc1
|
| ZINC33023984 ZINC | 0.525 | 265.2 Da LogP 0.75 TPSA 87.3 | ✓ Ro5 | ✓ Clean |
O=C(CC[C@@H]1NC(=O)NC1=O)Nc1ccc(F)cc1
|
| ZINC33023987 ZINC | 0.525 | 265.2 Da LogP 0.75 TPSA 87.3 | ✓ Ro5 | ✓ Clean |
O=C(CC[C@H]1NC(=O)NC1=O)Nc1ccc(F)cc1
|
| ZINC952962109 ZINC | 0.525 | 267.2 Da LogP -0.00 TPSA 78.5 | ✓ Ro5 | ✓ Clean |
CN(CC(F)(F)F)C(=O)CC[C@@H]1NC(=O)NC1=O
|
| ZINC952983648 ZINC | 0.525 | 239.3 Da LogP 0.03 TPSA 87.3 | ✓ Ro5 | ✓ Clean |
CC1(NC(=O)CC[C@@H]2NC(=O)NC2=O)CCC1
|
| ZINC31971003 ZINC | 0.524 | 275.3 Da LogP 0.33 TPSA 87.3 | ✓ Ro5 | ✓ Clean |
O=C(CC[C@@H]1NC(=O)NC1=O)NCCc1ccccc1
|
| ZINC31971004 ZINC | 0.524 | 275.3 Da LogP 0.33 TPSA 87.3 | ✓ Ro5 | ✓ Clean |
O=C(CC[C@H]1NC(=O)NC1=O)NCCc1ccccc1
|
| ZINC375284974 ZINC | 0.524 | 309.4 Da LogP 0.39 TPSA 87.7 | ✓ Ro5 | ✓ Clean |
O=C1NC(=O)[C@H](CCC(=O)N2CCC3(CCOCC3)CC2)N1
|
| ZINC817863294 ZINC | 0.524 | 285.3 Da LogP -0.41 TPSA 124.6 | ✓ Ro5 | ✓ Clean |
CC(C)C[C@H](NC(=O)CC[C@@H]1NC(=O)NC1=O)C(=O)O
|
| ZINC3290147 ZINC | 0.514 | 204.2 Da LogP 0.83 TPSA 58.2 | ✓ Ro5 | ✓ Clean |
O=C1NC(=O)[C@H](CCc2ccccc2)N1
|
| ZINC3290149 ZINC | 0.514 | 204.2 Da LogP 0.83 TPSA 58.2 | ✓ Ro5 | ✓ Clean |
O=C1NC(=O)[C@@H](CCc2ccccc2)N1
|
| ZINC1290648834 ZINC | 0.512 | 257.2 Da LogP -1.39 TPSA 104.8 | ✓ Ro5 | ✓ Clean |
COC(=O)CN(C)C(=O)CC[C@@H]1NC(=O)NC1=O
|
| ZINC1800407951 ZINC | 0.512 | 281.3 Da LogP -0.80 TPSA 98.7 | ✓ Ro5 | ✓ Clean |
O=C1NC(=O)[C@H](CCC(=O)N2C[C@H]3C[C@H](O)C[C@H]…
|
| ZINC1800410722 ZINC | 0.512 | 281.3 Da LogP -0.80 TPSA 98.7 | ✓ Ro5 | ✓ Clean |
O=C1NC(=O)[C@H](CCC(=O)N2C[C@H]3C[C@@H](O)C[C@H…
|
| ZINC298211597 ZINC | 0.512 | 269.3 Da LogP -0.39 TPSA 87.7 | ✓ Ro5 | ✓ Clean |
C[C@H]1CN(C(=O)CC[C@@H]2NC(=O)NC2=O)C[C@@H](C)O1
|
| ZINC32845419 ZINC | 0.512 | 281.4 Da LogP 1.01 TPSA 78.5 | ✓ Ro5 | ✓ Clean |
CC1CCC(N(C)C(=O)CC[C@@H]2NC(=O)NC2=O)CC1
|
| ZINC32845420 ZINC | 0.512 | 281.4 Da LogP 1.01 TPSA 78.5 | ✓ Ro5 | ✓ Clean |
CC1CCC(N(C)C(=O)CC[C@H]2NC(=O)NC2=O)CC1
|
| ZINC61532389 ZINC | 0.512 | 257.2 Da LogP -1.39 TPSA 104.8 | ✓ Ro5 | ✓ Clean |
COC(=O)CN(C)C(=O)CC[C@H]1NC(=O)NC1=O
|
| ZINC642111927 ZINC | 0.512 | 281.4 Da LogP 1.16 TPSA 78.5 | ✓ Ro5 | ✓ Clean |
CCN(C(=O)CC[C@@H]1NC(=O)NC1=O)C1CCCCC1
|
| ZINC68193206 ZINC | 0.512 | 326.1 Da LogP 1.38 TPSA 87.3 | ✓ Ro5 | ✓ Clean |
O=C(CC[C@H]1NC(=O)NC1=O)Nc1ccc(Br)cc1
|
| ZINC68193207 ZINC | 0.512 | 326.1 Da LogP 1.38 TPSA 87.3 | ✓ Ro5 | ✓ Clean |
O=C(CC[C@@H]1NC(=O)NC1=O)Nc1ccc(Br)cc1
|
| ZINC952982722 ZINC | 0.512 | 277.3 Da LogP 0.40 TPSA 78.5 | ✓ Ro5 | ✓ Clean |
O=C1NC(=O)[C@H](CCC(=O)N2C[C@H]3CC=CC[C@H]3C2)N1
|
| ZINC819142317 ZINC | 0.512 | 305.3 Da LogP -0.08 TPSA 124.6 | ✓ Ro5 | ✓ Clean |
O=C(CC[C@@H]1NC(=O)NC1=O)N[C@H](C(=O)O)c1ccccc1
|
| ZINC12903744 ZINC | 0.500 | 267.3 Da LogP 0.67 TPSA 87.3 | ✓ Ro5 | ✓ Clean |
C[C@@H]1CCCC[C@@H]1NC(=O)CC[C@@H]1NC(=O)NC1=O
|
| ZINC13097148 ZINC | 0.500 | 316.4 Da LogP 0.32 TPSA 81.8 | ✓ Ro5 | ✓ Clean |
O=C1NC(=O)[C@H](CCC(=O)N2CCN(c3ccccc3)CC2)N1
|
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.