Protein target profile
VK055_4026
ADP-ribose pyrophosphatase
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
- No hit
- Gut microbiome similarity
- 3.2% 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.
Localization
- Localization
- Cytoplasmic
Structure confidence
- ColabFold pLDDT
- 96.03 0-100 confidence; >70 supports local structural interpretation.
Binding-site evidence
PDB experimental structureThe selected pocket score is the FPocket value used for ranking after applying the curated structure priority. It estimates small-molecule pocket quality; it is not experimental binding evidence. The 3D viewer may show a different loaded structure, so visible pockets can differ.
Cross-references
External database identifiers for this protein, its structures, ligands, and metabolic reactions.
Sequence
Sequence
Primary amino-acid sequence viewer.
MSKPTQQGITFSKNDVEIIARETLYRGFFSLDLYRFRHRLFNGGMSGEITREIFERGHAAVLLPFDPVRDEVVLVEQIRIAAYDTSESPWLLEMVAGMIEAGETVEDVARREALEEAGLEVGRTKPILSYLASPGGTSERLSILVGEVDASTAKGIHGLAEENEDIRVHVVSREQAYQWVEEGKIDNAASVIALQWLQLHYHNLRNEWTK
Functional annotations
Enzyme classification and Gene Ontology terms linked to this protein.
Enzyme Commission (EC)
1Gene Ontology (GO)
9- GO:0016818 Catalysis of the hydrolysis of any acid anhydride which contains phosphorus.
- GO:0046872 Binding to a metal ion.
- GO:0016787 Catalysis of the hydrolysis of various bonds, e.g. C-O, C-N, C-C, phosphoric anhydride bonds, etc.
- GO:0005829 The part of the cytoplasm that does not contain organelles but which does contain other particulate matter, such as protein complexes.
- GO:0047631 Catalysis of the reaction: ADP-ribose + H2O = AMP + D-ribose 5-phosphate.
- GO:0019144 Catalysis of the reaction: ADP-sugar + H2O = AMP + alpha-D-aldose 1-phosphate.
- GO:0000166 Binding to a nucleotide, any compound consisting of a nucleoside that is esterified with (ortho)phosphate or an oligophosphate at any hydroxyl group on the ribose or deoxyribose.
- GO:0006753 The chemical reactions and pathways involving any phosphorylated nucleoside.
- GO:0019693 The chemical reactions and pathways involving ribose phosphate, any phosphorylated ribose sugar.
Sequence domains and features
Domain and signature matches imported from InterPro and related databases.
Show feature table
| Start | End | DB | Term | Name |
|---|---|---|---|---|
| 2 | 209 | Gene3D | G3DSA:3.90.79.10 | Nucleoside Triphosphate Pyrophosphohydrolase |
| 14 | 199 | NCBIfam | TIGR00052 | nudix-type nucleoside diphosphatase, YffH/AdpP family |
| 14 | 199 | InterPro | IPR004385 | Nucleoside diphosphate pyrophosphatase |
| 1 | 209 | FunFam | G3DSA:3.90.79.10:FF:000011 | ADP-ribose pyrophosphatase |
| 97 | 118 | ProSitePatterns | PS00893 | Nudix box signature. |
| 97 | 118 | InterPro | IPR020084 | NUDIX hydrolase, conserved site |
| 6 | 208 | SUPERFAMILY | SSF55811 | Nudix |
| 6 | 208 | InterPro | IPR015797 | NUDIX hydrolase-like domain superfamily |
| 46 | 200 | PANTHER | PTHR11839 | UDP/ADP-SUGAR PYROPHOSPHATASE |
| 56 | 200 | CDD | cd03424 | ADPRase_NUDT5 |
| 55 | 193 | ProSiteProfiles | PS51462 | Nudix hydrolase domain profile. |
| 55 | 193 | InterPro | IPR000086 | NUDIX hydrolase domain |
| 59 | 179 | Pfam | PF00293 | NUDIX domain |
| 59 | 179 | InterPro | IPR000086 | NUDIX hydrolase domain |
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
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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 · FPocket
Druggability: high ≥ 0.7 · medium 0.4–0.69 · low < 0.4
Binding pockets · P2Rank
Probability: high ≥ 0.5 · medium 0.2–0.49 · low < 0.2
Binding pockets · FPocket
Druggability: high ≥ 0.7 · medium 0.4–0.69 · low < 0.4
Binding pockets · P2Rank
Probability: high ≥ 0.5 · medium 0.2–0.49 · low < 0.2
Residue sets
All structural evidence
Structural evidence
4 + 1Experimental 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 |
|---|---|---|---|---|---|---|
|
PDB
9B1Z
|
X-ray | 1.25 Å | A,B |
|
Viewing | |
|
PDB
9B22
|
X-ray | 1.30 Å | A,B |
|
Loaded | |
|
PDB
9B20
|
X-ray | 1.55 Å | A,B |
|
Loaded | |
|
PDB
9B21
|
X-ray | 1.60 Å | A,B |
|
Loaded | |
|
ColabFold
VK055_4026
|
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 |
|---|---|---|---|---|---|---|
| ADV RCSB PDB | Q93K97 | 557.3 Da LogP -3.17 TPSA 282.3 | 3 viol. | ✓ Clean |
c1nc(c2c(n1)n(cn2)[C@H]3[C@@H]([C@@H]([C@H](O3)…
|
|
| APR RCSB PDB | Q84CU3 | 559.3 Da LogP -3.28 TPSA 291.5 | 3 viol. | ✓ Clean |
c1nc(c2c(n1)n(cn2)[C@H]3[C@@H]([C@@H]([C@H](O3)…
|
|
| AR6 RCSB PDB | Q5SKW5 | 559.3 Da LogP -3.28 TPSA 291.5 | 3 viol. | ✓ Clean |
c1nc(c2c(n1)n(cn2)[C@H]3[C@@H]([C@@H]([C@H](O3)…
|
|
| GD3 RCSB PDB | Q93K97 | 157.2 Da LogP 0.00 TPSA 0.0 | ✓ Ro5 | ✓ Clean |
[Gd+3]
|
|
| GDD RCSB PDB | P37128 | 605.3 Da LogP -4.63 TPSA 331.7 | 3 viol. | ✓ Clean |
c1nc2c(n1[C@H]3[C@@H]([C@@H]([C@H](O3)CO[P@](=O…
|
|
| R5P RCSB PDB | Q84CU3 | 230.1 Da LogP -2.62 TPSA 144.5 | ✓ Ro5 | ✓ Clean |
C(C(C(C(C=O)O)O)O)OP(=O)(O)O
|
|
| TAR RCSB PDB | P37128 | 150.1 Da LogP -2.12 TPSA 115.1 | ✓ Ro5 | ✓ Clean |
[C@H]([C@@H](C(=O)O)O)(C(=O)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 |
|---|---|---|---|---|---|
| ZINC1530556 ZINC | 1.000 | 230.1 Da LogP -2.62 TPSA 144.5 | ✓ Ro5 | ✓ Clean |
O=C[C@H](O)[C@@H](O)[C@H](O)COP(=O)(O)O
|
| ZINC22116391 ZINC | 1.000 | 230.1 Da LogP -2.62 TPSA 144.5 | ✓ Ro5 | ✓ Clean |
O=C[C@H](O)[C@H](O)[C@H](O)COP(=O)(O)O
|
| ZINC3606137 ZINC | 1.000 | 230.1 Da LogP -2.62 TPSA 144.5 | ✓ Ro5 | ✓ Clean |
O=C[C@@H](O)[C@H](O)[C@H](O)COP(=O)(O)O
|
| ZINC3869426 ZINC | 1.000 | 230.1 Da LogP -2.62 TPSA 144.5 | ✓ Ro5 | ✓ Clean |
O=C[C@@H](O)[C@@H](O)[C@@H](O)COP(=O)(O)O
|
| ZINC8551307 ZINC | 1.000 | 230.1 Da LogP -2.62 TPSA 144.5 | ✓ Ro5 | ✓ Clean |
O=C[C@H](O)[C@H](O)[C@@H](O)COP(=O)(O)O
|
| ZINC8551308 ZINC | 1.000 | 230.1 Da LogP -2.62 TPSA 144.5 | ✓ Ro5 | ✓ Clean |
O=C[C@H](O)[C@@H](O)[C@@H](O)COP(=O)(O)O
|
| ZINC100033330 ZINC | 0.889 | 260.1 Da LogP -3.26 TPSA 164.8 | 1 viol. | ✓ Clean |
O=C[C@H](O)[C@@H](O)[C@@H](O)[C@H](O)COP(=O)(O)O
|
| ZINC100067275 ZINC | 0.889 | 260.1 Da LogP -3.26 TPSA 164.8 | 1 viol. | ✓ Clean |
O=C[C@H](O)[C@H](O)[C@H](O)[C@H](O)COP(=O)(O)O
|
| ZINC100889630 ZINC | 0.889 | 260.1 Da LogP -3.26 TPSA 164.8 | 1 viol. | ✓ Clean |
O=C[C@H](O)[C@H](O)[C@@H](O)[C@@H](O)COP(=O)(O)O
|
| ZINC104861723 ZINC | 0.889 | 260.1 Da LogP -3.26 TPSA 164.8 | 1 viol. | ✓ Clean |
O=C[C@@H](O)[C@H](O)[C@@H](O)[C@@H](O)COP(=O)(O…
|
| ZINC12503760 ZINC | 0.889 | 260.1 Da LogP -3.26 TPSA 164.8 | 1 viol. | ✓ Clean |
O=C[C@H](O)[C@H](O)[C@H](O)[C@@H](O)COP(=O)(O)O
|
| ZINC12503763 ZINC | 0.889 | 260.1 Da LogP -3.26 TPSA 164.8 | 1 viol. | ✓ Clean |
O=C[C@H](O)[C@H](O)[C@@H](O)[C@H](O)COP(=O)(O)O
|
| ZINC19850142 ZINC | 0.889 | 260.1 Da LogP -3.26 TPSA 164.8 | 1 viol. | ✓ Clean |
O=C[C@H](O)[C@@H](O)[C@H](O)[C@H](O)COP(=O)(O)O
|
| ZINC2508229 ZINC | 0.889 | 260.1 Da LogP -3.26 TPSA 164.8 | 1 viol. | ✓ Clean |
O=C[C@@H](O)[C@@H](O)[C@H](O)[C@H](O)COP(=O)(O)O
|
| ZINC4545927 ZINC | 0.889 | 260.1 Da LogP -3.26 TPSA 164.8 | 1 viol. | ✓ Clean |
O=C[C@@H](O)[C@@H](O)[C@@H](O)[C@@H](O)COP(=O)(…
|
| ZINC4545928 ZINC | 0.889 | 260.1 Da LogP -3.26 TPSA 164.8 | 1 viol. | ✓ Clean |
O=C[C@@H](O)[C@@H](O)[C@@H](O)[C@H](O)COP(=O)(O…
|
| ZINC4545929 ZINC | 0.889 | 260.1 Da LogP -3.26 TPSA 164.8 | 1 viol. | ✓ Clean |
O=C[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)COP(=O)(O…
|
| ZINC12360002 ZINC | 0.855 | 427.2 Da LogP -1.75 TPSA 232.6 | 2 viol. | ✓ Clean |
Nc1ncnc2c1ncn2[C@@H]1O[C@H](CO[P@@](=O)(O)OP(=O…
|
| ZINC12360703 ZINC | 0.855 | 427.2 Da LogP -1.75 TPSA 232.6 | 2 viol. | ✓ Clean |
Nc1ncnc2c1ncn2[C@@H]1O[C@H](CO[P@@](=O)(O)OP(=O…
|
| ZINC12503599 ZINC | 0.855 | 427.2 Da LogP -1.75 TPSA 232.6 | 2 viol. | ✓ Clean |
Nc1ncnc2c1ncn2[C@@H]1O[C@H](CO[P@@](=O)(O)OP(=O…
|
| ZINC16546165 ZINC | 0.855 | 427.2 Da LogP -1.75 TPSA 232.6 | 2 viol. | ✓ Clean |
Nc1ncnc2c1ncn2[C@H]1O[C@H](CO[P@](=O)(O)OP(=O)(…
|
| ZINC31977053 ZINC | 0.855 | 427.2 Da LogP -1.75 TPSA 232.6 | 2 viol. | ✓ Clean |
Nc1ncnc2c1ncn2[C@H]1O[C@@H](CO[P@](=O)(O)OP(=O)…
|
| ZINC4806433 ZINC | 0.855 | 427.2 Da LogP -1.75 TPSA 232.6 | 2 viol. | ✓ Clean |
Nc1ncnc2c1ncn2[C@@H]1O[C@H](CO[P@@](=O)(O)OP(=O…
|
| ZINC53683898 ZINC | 0.855 | 427.2 Da LogP -1.75 TPSA 232.6 | 2 viol. | ✓ Clean |
Nc1ncnc2c1ncn2[C@@H]1O[C@@H](CO[P@@](=O)(O)OP(=…
|
| ZINC8586019 ZINC | 0.855 | 427.2 Da LogP -1.75 TPSA 232.6 | 2 viol. | ✓ Clean |
Nc1ncnc2c1ncn2[C@H]1O[C@@H](CO[P@](=O)(O)OP(=O)…
|
| ZINC8586020 ZINC | 0.855 | 427.2 Da LogP -1.75 TPSA 232.6 | 2 viol. | ✓ Clean |
Nc1ncnc2c1ncn2[C@@H]1O[C@@H](CO[P@@](=O)(O)OP(=…
|
| ZINC8586021 ZINC | 0.855 | 427.2 Da LogP -1.75 TPSA 232.6 | 2 viol. | ✓ Clean |
Nc1ncnc2c1ncn2[C@H]1O[C@@H](CO[P@@](=O)(O)OP(=O…
|
| ZINC8586022 ZINC | 0.855 | 427.2 Da LogP -1.75 TPSA 232.6 | 2 viol. | ✓ Clean |
Nc1ncnc2c1ncn2[C@@H]1O[C@@H](CO[P@@](=O)(O)OP(=…
|
| ZINC13518964 ZINC | 0.782 | 347.2 Da LogP -1.86 TPSA 186.1 | ✓ Ro5 | ✓ Clean |
Nc1ncnc2c1ncn2[C@@H]1O[C@@H](COP(=O)(O)O)[C@H](…
|
| ZINC1532515 ZINC | 0.782 | 347.2 Da LogP -1.86 TPSA 186.1 | ✓ Ro5 | ✓ Clean |
Nc1ncnc2c1ncn2[C@H]1O[C@@H](COP(=O)(O)O)[C@H](O…
|
| ZINC1571045 ZINC | 0.782 | 347.2 Da LogP -1.86 TPSA 186.1 | ✓ Ro5 | ✓ Clean |
Nc1ncnc2c1ncn2[C@@H]1O[C@@H](COP(=O)(O)O)[C@@H]…
|
| ZINC1842158 ZINC | 0.782 | 347.2 Da LogP -1.86 TPSA 186.1 | ✓ Ro5 | ✓ Clean |
Nc1ncnc2c1ncn2[C@H]1O[C@@H](COP(=O)(O)O)[C@H](O…
|
| ZINC2046931 ZINC | 0.782 | 347.2 Da LogP -1.86 TPSA 186.1 | ✓ Ro5 | ✓ Clean |
Nc1ncnc2c1ncn2[C@@H]1O[C@@H](COP(=O)(O)O)[C@H](…
|
| ZINC2126310 ZINC | 0.782 | 347.2 Da LogP -1.86 TPSA 186.1 | ✓ Ro5 | ✓ Clean |
Nc1ncnc2c1ncn2[C@@H]1O[C@H](COP(=O)(O)O)[C@@H](…
|
| ZINC3201891 ZINC | 0.782 | 347.2 Da LogP -1.86 TPSA 186.1 | ✓ Ro5 | ✓ Clean |
Nc1ncnc2c1ncn2[C@@H]1O[C@@H](COP(=O)(O)O)[C@@H]…
|
| ZINC3201893 ZINC | 0.782 | 347.2 Da LogP -1.86 TPSA 186.1 | ✓ Ro5 | ✓ Clean |
Nc1ncnc2c1ncn2[C@H]1O[C@@H](COP(=O)(O)O)[C@@H](…
|
| ZINC3830180 ZINC | 0.782 | 347.2 Da LogP -1.86 TPSA 186.1 | ✓ Ro5 | ✓ Clean |
Nc1ncnc2c1ncn2[C@H]1O[C@@H](COP(=O)(O)O)[C@@H](…
|
| ZINC3860156 ZINC | 0.782 | 347.2 Da LogP -1.86 TPSA 186.1 | ✓ Ro5 | ✓ Clean |
Nc1ncnc2c1ncn2[C@@H]1O[C@H](COP(=O)(O)O)[C@@H](…
|
| ZINC3977897 ZINC | 0.782 | 347.2 Da LogP -1.86 TPSA 186.1 | ✓ Ro5 | ✓ Clean |
Nc1ncnc2c1ncn2[C@H]1O[C@H](COP(=O)(O)O)[C@@H](O…
|
| ZINC4806442 ZINC | 0.782 | 347.2 Da LogP -1.86 TPSA 186.1 | ✓ Ro5 | ✓ Clean |
Nc1ncnc2c1ncn2[C@@H]1O[C@H](COP(=O)(O)O)[C@H](O…
|
| ZINC8613167 ZINC | 0.782 | 347.2 Da LogP -1.86 TPSA 186.1 | ✓ Ro5 | ✓ Clean |
Nc1ncnc2c1ncn2[C@@H]1O[C@H](COP(=O)(O)O)[C@H](O…
|
| ZINC1532601 ZINC | 0.778 | 200.1 Da LogP -1.98 TPSA 124.3 | ✓ Ro5 | ✓ Clean |
O=C[C@@H](O)[C@H](O)COP(=O)(O)O
|
| ZINC32786787 ZINC | 0.778 | 200.1 Da LogP -1.98 TPSA 124.3 | ✓ Ro5 | ✓ Clean |
O=C[C@H](O)[C@H](O)COP(=O)(O)O
|
| ZINC4096224 ZINC | 0.768 | 346.2 Da LogP -1.90 TPSA 191.9 | ✓ Ro5 | ✓ Clean |
Nc1ncnc2c1ncn2[C@@H]1O[C@H](CO[P@](N)(=O)O)[C@@…
|
| ZINC12503850 ZINC | 0.763 | 427.3 Da LogP -2.04 TPSA 229.4 | 1 viol. | ✓ Clean |
Nc1ncnc2c1ncn2[C@@H]1O[C@H](CO[P@](=O)(O)OS(=O)…
|
| ZINC141161066 ZINC | 0.763 | 427.3 Da LogP -2.04 TPSA 229.4 | 1 viol. | ✓ Clean |
Nc1ncnc2c1ncn2[C@@H]1O[C@H](CO[P@](=O)(O)OS(=O)…
|
| ZINC141163786 ZINC | 0.763 | 427.3 Da LogP -2.04 TPSA 229.4 | 1 viol. | ✓ Clean |
Nc1ncnc2c1ncn2[C@@H]1O[C@H](CO[P@](=O)(O)OS(=O)…
|
| ZINC4228246 ZINC | 0.763 | 427.3 Da LogP -2.04 TPSA 229.4 | 1 viol. | ✓ Clean |
Nc1ncnc2c1ncn2[C@@H]1O[C@H](CO[P@@](=O)(O)OS(=O…
|
| ZINC12504289 ZINC | 0.761 | 443.2 Da LogP -2.45 TPSA 252.6 | 2 viol. | ✓ Clean |
Nc1nc2c(ncn2[C@@H]2O[C@H](CO[P@@](=O)(O)OP(=O)(…
|
| ZINC105372833 ZINC | 0.750 | 345.3 Da LogP -1.93 TPSA 197.6 | ✓ Ro5 | ✓ Clean |
Nc1ncnc2c1ncn2[C@@H]1O[C@H](COP(N)(N)=O)[C@H](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.