KpATCC43816 Protein target profile
bacterial regulatory helix-turn-helix, AraC family protein
Accession: VK055_0883
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
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
- No hit
- Gut microbiome similarity
- 1.2% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.
Essentiality
- Essential (DEG)
- N
- DEG identity (%)
- 30.476 Higher values support similarity to known essential genes.
Structure confidence
- ColabFold pLDDT
- 82.22 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.
MTENANILTTPSVTPSRHQVVALAYDGLCTFEFGVAVEIFGLPRPEMGDNWYQFAVAAVDEGPLCATGGIRLMTDGGPELLAQADTIVVPGWRGVDAPVPEALCAALASAHARGCRIISICSGVFVLAAAGLLNGRQATTHWRYTAALQSRFPQIQVVEDVLYVGDALLMTSAGSAAGIDLCLHLVREDFGSEAANVVARRLVVSPHRDGGQAQQVLRPVARSRESLRLGQLFDYLHQHLAASHTVASLAQRAGMGTRTFLRRFEEATGKTPARWLLEERLLRARQHLTESTMGIDQIAERCGFASAGTLRHHFRQHFALSPLQYRKQFTPSPIAKSSQPRTIDGHSKPVARRVDDEERVSGSDL
Functional annotations
Enzyme classification and Gene Ontology terms linked to this protein.
Subcellular localization
- Localization
- Cytoplasmic
Gene Ontology (GO)
3- GO:0043565 Binding to DNA of a specific nucleotide composition, e.g. GC-rich DNA binding, or with a specific sequence motif or type of DNA e.g. promotor binding or rDNA binding.
- GO:0003700 A transcription regulator activity that modulates transcription of gene sets via selective and non-covalent binding to a specific double-stranded genomic DNA sequence (sometimes referred to as a motif) within a cis-regulatory region. Regulatory regions include promoters (proximal and distal) and enhancers. Genes are transcriptional units, and include bacterial operons.
- GO:0006355 Any process that modulates the frequency, rate or extent of cellular DNA-templated transcription.
Sequence domains and features
Domain and signature matches imported from InterPro and related databases.
Show feature table
| Start | End | DB | Term | Name |
|---|---|---|---|---|
| 230 | 328 | ProSiteProfiles | PS01124 | Bacterial regulatory proteins, araC family DNA-binding domain profile. |
| 230 | 328 | InterPro | IPR018060 | DNA binding HTH domain, AraC-type |
| 280 | 330 | SUPERFAMILY | SSF46689 | Homeodomain-like |
| 280 | 330 | InterPro | IPR009057 | Homeobox-like domain superfamily |
| 329 | 365 | MobiDBLite | mobidb-lite | consensus disorder prediction |
| 50 | 187 | Pfam | PF01965 | DJ-1/PfpI family |
| 50 | 187 | InterPro | IPR002818 | DJ-1/PfpI |
| 15 | 266 | PANTHER | PTHR43130 | ARAC-FAMILY TRANSCRIPTIONAL REGULATOR |
| 346 | 365 | MobiDBLite | mobidb-lite | consensus disorder prediction |
| 20 | 204 | CDD | cd03137 | GATase1_AraC_1 |
| 19 | 208 | SUPERFAMILY | SSF52317 | Class I glutamine amidotransferase-like |
| 19 | 208 | InterPro | IPR029062 | Class I glutamine amidotransferase-like |
| 280 | 322 | ProSitePatterns | PS00041 | Bacterial regulatory proteins, araC family signature. |
| 280 | 322 | InterPro | IPR018062 | HTH domain AraC-type, conserved site |
| 15 | 216 | Gene3D | G3DSA:3.40.50.880 | - |
| 15 | 216 | InterPro | IPR029062 | Class I glutamine amidotransferase-like |
| 329 | 344 | MobiDBLite | mobidb-lite | consensus disorder prediction |
| 243 | 326 | SMART | SM00342 | aracneu4 |
| 243 | 326 | InterPro | IPR018060 | DNA binding HTH domain, AraC-type |
| 249 | 328 | Pfam | PF12833 | Helix-turn-helix domain |
| 249 | 328 | InterPro | IPR018060 | DNA binding HTH domain, AraC-type |
| 228 | 331 | Gene3D | G3DSA:1.10.10.60 | - |
| 228 | 277 | SUPERFAMILY | SSF46689 | Homeodomain-like |
| 228 | 277 | InterPro | IPR009057 | Homeobox-like 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.
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
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
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_A0A0H3GT60
|
AlphaFold DB | — | — | full sequence | — | Viewing |
|
ColabFold
VK055_0883
|
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.
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 |
|---|---|---|---|---|---|
| ZINC1710230 ZINC | 1.000 | 207.3 Da LogP 0.80 TPSA 66.4 | ✓ Ro5 | ✓ Clean |
O=S(=O)(O)CCNC1CCCCC1
|
| ZINC2004372 ZINC | 0.786 | 221.3 Da LogP 1.19 TPSA 66.4 | ✓ Ro5 | ✓ Clean |
O=S(=O)(O)CCCNC1CCCCC1
|
| ZINC38364153 ZINC | 0.786 | 235.3 Da LogP 1.58 TPSA 66.4 | ✓ Ro5 | ✓ Clean |
O=S(=O)(O)CCCCNC1CCCCC1
|
| ZINC1532902 ZINC | 0.700 | 206.2 Da LogP -0.86 TPSA 132.1 | ✓ Ro5 | ✓ Clean |
O=C(O)CC[C@@](O)(CC(=O)O)C(=O)O
|
| ZINC2018106 ZINC | 0.700 | 206.2 Da LogP -0.86 TPSA 132.1 | ✓ Ro5 | ✓ Clean |
O=C(O)CC[C@](O)(CC(=O)O)C(=O)O
|
| ZINC100349549 ZINC | 0.667 | 272.2 Da LogP 3.92 TPSA 111.0 | ✓ Ro5 | Alert |
O=[N+]([O-])c1ccc(/N=N\c2ccc([N+](=O)[O-])cc2)c…
|
| ZINC13477308 ZINC | 0.667 | 272.2 Da LogP 3.92 TPSA 111.0 | ✓ Ro5 | Alert |
O=[N+]([O-])c1ccc(/N=N/c2ccc([N+](=O)[O-])cc2)c…
|
| ZINC3593496 ZINC | 0.652 | 206.2 Da LogP -1.16 TPSA 121.1 | ✓ Ro5 | ✓ Clean |
COC(=O)C[C@@](O)(CC(=O)O)C(=O)O
|
| ZINC3593497 ZINC | 0.652 | 206.2 Da LogP -1.16 TPSA 121.1 | ✓ Ro5 | ✓ Clean |
COC(=O)C[C@](O)(CC(=O)O)C(=O)O
|
| ZINC14686440 ZINC | 0.625 | 436.4 Da LogP -2.64 TPSA 247.9 | 1 viol. | ✓ Clean |
O=C(O)C[C@](O)(CC(=O)NCCCCNC(=O)C[C@@](O)(CC(=O…
|
| ZINC14686442 ZINC | 0.625 | 436.4 Da LogP -2.64 TPSA 247.9 | 1 viol. | ✓ Clean |
O=C(O)C[C@@](O)(CC(=O)NCCCCNC(=O)C[C@](O)(CC(=O…
|
| ZINC14686444 ZINC | 0.625 | 436.4 Da LogP -2.64 TPSA 247.9 | 1 viol. | ✓ Clean |
O=C(O)C[C@@](O)(CC(=O)NCCCCNC(=O)C[C@@](O)(CC(=…
|
| ZINC104039967 ZINC | 0.615 | 288.2 Da LogP 3.43 TPSA 124.7 | ✓ Ro5 | Alert |
O=[N+]([O-])c1ccc(N=[N+]([O-])c2ccc([N+](=O)[O-…
|
| ZINC13398039 ZINC | 0.577 | 234.2 Da LogP -0.38 TPSA 121.1 | ✓ Ro5 | ✓ Clean |
CC(C)OC(=O)C[C@](O)(CC(=O)O)C(=O)O
|
| ZINC2528012 ZINC | 0.577 | 234.2 Da LogP -0.38 TPSA 121.1 | ✓ Ro5 | ✓ Clean |
CC(C)OC(=O)C[C@@](O)(CC(=O)O)C(=O)O
|
| ZINC100172111 ZINC | 0.571 | 227.2 Da LogP 4.01 TPSA 67.9 | ✓ Ro5 | Alert |
O=[N+]([O-])c1ccc(/N=N\c2ccccc2)cc1
|
| ZINC18084630 ZINC | 0.571 | 227.2 Da LogP 4.01 TPSA 67.9 | ✓ Ro5 | Alert |
O=[N+]([O-])c1ccc(/N=N/c2ccccc2)cc1
|
| ZINC254365173 ZINC | 0.571 | 227.2 Da LogP 4.01 TPSA 67.9 | ✓ Ro5 | Alert |
O=[N+]([O-])c1ccc(N=Nc2ccccc2)cc1
|
| ZINC146315135 ZINC | 0.560 | 204.2 Da LogP 0.86 TPSA 94.8 | ✓ Ro5 | ✓ Clean |
CCCCC[C@@](O)(CC(=O)O)C(=O)O
|
| ZINC146315336 ZINC | 0.560 | 204.2 Da LogP 0.86 TPSA 94.8 | ✓ Ro5 | ✓ Clean |
CCCCC[C@](O)(CC(=O)O)C(=O)O
|
| ZINC19367005 ZINC | 0.560 | 224.4 Da LogP 2.83 TPSA 24.1 | ✓ Ro5 | ✓ Clean |
C1CCC(NCCNC2CCCCC2)CC1
|
| ZINC26468763 ZINC | 0.559 | 243.3 Da LogP -1.35 TPSA 100.5 | ✓ Ro5 | ✓ Clean |
O=S(=O)(O)CCN[C@@H]1CCS(=O)(=O)C1
|
| ZINC26468770 ZINC | 0.559 | 243.3 Da LogP -1.35 TPSA 100.5 | ✓ Ro5 | ✓ Clean |
O=S(=O)(O)CCN[C@H]1CCS(=O)(=O)C1
|
| ZINC1850353 ZINC | 0.556 | 206.1 Da LogP -0.86 TPSA 132.1 | ✓ Ro5 | ✓ Clean |
O=C(O)CC(O)(CC(=O)O)CC(=O)O
|
| ZINC5188799 ZINC | 0.556 | 280.5 Da LogP 4.39 TPSA 24.1 | ✓ Ro5 | ✓ Clean |
C(CCCNC1CCCCC1)CCNC1CCCCC1
|
| ZINC100009138 ZINC | 0.552 | 243.2 Da LogP 3.72 TPSA 88.1 | ✓ Ro5 | Alert |
O=[N+]([O-])c1ccc(/N=N\c2ccc(O)cc2)cc1
|
| ZINC100009140 ZINC | 0.552 | 243.2 Da LogP 3.72 TPSA 88.1 | ✓ Ro5 | Alert |
O=[N+]([O-])c1ccc(/N=N/c2ccc(O)cc2)cc1
|
| ZINC12405069 ZINC | 0.552 | 242.2 Da LogP 3.59 TPSA 93.9 | ✓ Ro5 | Alert |
Nc1ccc(N=Nc2ccc([N+](=O)[O-])cc2)cc1
|
| ZINC254392989 ZINC | 0.552 | 243.2 Da LogP 3.72 TPSA 88.1 | ✓ Ro5 | Alert |
O=[N+]([O-])c1ccc(N=Nc2ccc(O)cc2)cc1
|
| ZINC3861520 ZINC | 0.552 | 242.2 Da LogP 3.59 TPSA 93.9 | ✓ Ro5 | Alert |
Nc1ccc(/N=N/c2ccc([N+](=O)[O-])cc2)cc1
|
| ZINC4461716 ZINC | 0.552 | 241.3 Da LogP 4.32 TPSA 67.9 | ✓ Ro5 | Alert |
Cc1ccc(/N=N/c2ccc([N+](=O)[O-])cc2)cc1
|
| ZINC100838097 ZINC | 0.548 | 336.3 Da LogP 2.98 TPSA 145.1 | ✓ Ro5 | Alert |
O=[N+]([O-])c1ccc(/N=N/S(=O)(=O)c2ccc([N+](=O)[…
|
| ZINC1604377 ZINC | 0.542 | 320.3 Da LogP 4.84 TPSA 86.3 | ✓ Ro5 | ✓ Clean |
O=[N+]([O-])c1ccc(-c2ccc(-c3ccc([N+](=O)[O-])cc…
|
| ZINC1648209 ZINC | 0.542 | 244.2 Da LogP 3.17 TPSA 86.3 | ✓ Ro5 | ✓ Clean |
O=[N+]([O-])c1ccc(-c2ccc([N+](=O)[O-])cc2)cc1
|
| ZINC100480229 ZINC | 0.533 | 271.2 Da LogP 3.25 TPSA 98.6 | ✓ Ro5 | ✓ Clean |
O=[N+]([O-])c1ccc(/C=N\c2ccc([N+](=O)[O-])cc2)c…
|
| ZINC12403614 ZINC | 0.533 | 271.2 Da LogP 3.25 TPSA 98.6 | ✓ Ro5 | ✓ Clean |
O=[N+]([O-])c1ccc(/C=N/c2ccc([N+](=O)[O-])cc2)c…
|
| ZINC254391581 ZINC | 0.533 | 271.2 Da LogP 3.25 TPSA 98.6 | ✓ Ro5 | ✓ Clean |
O=[N+]([O-])c1ccc(C=Nc2ccc([N+](=O)[O-])cc2)cc1
|
| ZINC39239102 ZINC | 0.533 | 214.2 Da LogP 1.95 TPSA 72.6 | ✓ Ro5 | ✓ Clean |
CS(C)(=O)=Nc1ccc([N+](=O)[O-])cc1
|
| ZINC2168583 ZINC | 0.529 | 237.3 Da LogP 0.16 TPSA 86.6 | ✓ Ro5 | ✓ Clean |
O=S(=O)(O)C[C@@H](O)CNC1CCCCC1
|
| ZINC2168584 ZINC | 0.529 | 237.3 Da LogP 0.16 TPSA 86.6 | ✓ Ro5 | ✓ Clean |
O=S(=O)(O)C[C@H](O)CNC1CCCCC1
|
| ZINC13398014 ZINC | 0.522 | 220.2 Da LogP -1.07 TPSA 110.1 | ✓ Ro5 | ✓ Clean |
COC(=O)CC(O)(CC(=O)OC)C(=O)O
|
| ZINC3861629 ZINC | 0.522 | 206.1 Da LogP -1.16 TPSA 121.1 | ✓ Ro5 | ✓ Clean |
COC(=O)C(O)(CC(=O)O)CC(=O)O
|
| ZINC130127586 ZINC | 0.515 | 260.4 Da LogP 1.38 TPSA 58.2 | ✓ Ro5 | ✓ Clean |
O=S(=O)(NCCNC1CCCCCC1)C1CC1
|
| ZINC78421079 ZINC | 0.515 | 210.3 Da LogP 1.43 TPSA 41.1 | ✓ Ro5 | ✓ Clean |
O=C(NCCNC1CCCCC1)C1CC1
|
| ZINC104075553 ZINC | 0.500 | 243.2 Da LogP 3.52 TPSA 81.6 | ✓ Ro5 | Alert |
O=[N+]([O-])c1ccc([N+]([O-])=Nc2ccccc2)cc1
|
| ZINC1511626 ZINC | 0.500 | 249.0 Da LogP 2.20 TPSA 43.1 | ✓ Ro5 | ✓ Clean |
O=[N+]([O-])c1ccc(I)cc1
|
| ZINC165485 ZINC | 0.500 | 301.8 Da LogP 3.04 TPSA 46.2 | ✓ Ro5 | ✓ Clean |
O=S(=O)(CCNC1CCCCC1)c1ccc(Cl)cc1
|
| ZINC17005675 ZINC | 0.500 | 257.2 Da LogP 4.02 TPSA 77.1 | ✓ Ro5 | Alert |
COc1ccc(/N=N/c2ccc([N+](=O)[O-])cc2)cc1
|
| ZINC4113982 ZINC | 0.500 | 270.3 Da LogP 4.08 TPSA 71.1 | ✓ Ro5 | Alert |
CN(C)c1ccc(/N=N/c2ccc([N+](=O)[O-])cc2)cc1
|
| ZINC60934954 ZINC | 0.500 | 315.9 Da LogP 3.43 TPSA 46.2 | ✓ Ro5 | ✓ Clean |
O=S(=O)(CCNC1CCCCCC1)c1ccc(Cl)cc1
|
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.