Protein target profile

VK055_2464

guanosine monophosphate reductase

Genome: KpATCC43816 Gene: AIK81061.1 guaC 3D evidence: AlphaFold DB model + ColabFold model Metabolism 1 reaction UniProt A0A0H3GRS0
Length 347
Pocket druggability 0.659
Metabolic reactions 1
Chokepoint No
Direct ligand evidence 0 79 total records
Functional annotation 0 EC 5 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
Hit
Human identity (%)
87.5 Lower values reduce human off-target concern.
Human E-value
2.28e-18
Gut microbiome similarity
3.6% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

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

Localization

Localization
Cytoplasmic

Structure confidence

ColabFold pLDDT
95.28 0-100 confidence; >70 supports local structural interpretation.

Binding-site evidence

AlphaFold DB / UniProt model

The 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.

FPocket 0.659
Structure A0A0H3GRS0
Pocket Pocket 13
P2Rank 0.952
Structure A0A0H3GRS0
Pocket Pocket 1
ColabFold model
FPocket 0.603 · Pocket 9
P2Rank 0.953 · Pocket 1
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 170 / 4744 genomes with a hit
Prevalence 3.6%

Cross-references

External database identifiers for this protein, its structures, ligands, and metabolic reactions.

Metabolic context

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

Explore metabolic network

Metabolic context: more central than 96.9% of genes in this genome.

Relative network centrality 96.9% more central than 96.9% 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.

MRIEEDLKLGFKDVLIRPKRSTLKSRSDVELEREFTFKHSGLTWSGVPIIAANMDTVGTFSMAKALATFGILTAVHKHYTAEEWLAFTQGASADVLKHVMVSTGTSDADFEKTQQILSQNPQLNFVCIDVANGYSEHFVQFVAKAREAWPQKTIIAGNVVTGEMCEELILSGADIVKVGIGPGSVCTTRVKTGVGYPQLSAVIECADAAHGLGGQIISDGGCTMPGDVAKAFGGGADFVMLGGMLAGHEESGGTIVEENGEKFMLFYGMSSESAMTRHVGGVAKYRAAEGKTVKLPLRGPVENTARDILGGLRSACTYVGASRLKELTKRTTFIRVQEQENRVFNSL

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

5 GO

Gene Ontology (GO)

5
  • GO:0003920 Catalysis of the reaction: IMP + NADP+ + NH4 = GMP + 2 H+ + NADPH.
  • GO:0003824 Catalysis of a biochemical reaction at physiological temperatures. In biologically catalyzed reactions, the reactants are known as substrates, and the catalysts are naturally occurring macromolecular substances known as enzymes. Enzymes possess specific binding sites for substrates, and are usually composed wholly or largely of protein, but RNA that has catalytic activity (ribozyme) is often also regarded as enzymatic.
  • GO:0016491 Catalysis of an oxidation-reduction (redox) reaction, a reversible chemical reaction in which the oxidation state of an atom or atoms within a molecule is altered. One substrate acts as a hydrogen or electron donor and becomes oxidized, while the other acts as hydrogen or electron acceptor and becomes reduced.
  • GO:1902560 An oxidoreductase complex which is capable of GMP reductase activity. It catalyses the irreversible reaction: GMP + 2 H+ + NADPH => IMP + NADP+ + NH4.
  • GO:0009117 The chemical reactions and pathways involving a nucleotide, a nucleoside that is esterified with (ortho)phosphate or an oligophosphate at any hydroxyl group on the glycose moiety; may be mono-, di- or triphosphate; this definition includes cyclic nucleotides (nucleoside cyclic phosphates).

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

18 records
Show feature table
Start End DB Term Name
1 345 Hamap MF_00596 GMP reductase [guaC].
1 345 InterPro IPR005993 GMP reductase
6 336 SUPERFAMILY SSF51412 Inosine monophosphate dehydrogenase (IMPDH)
9 336 CDD cd00381 IMPDH
9 336 InterPro IPR001093 IMP dehydrogenase/GMP reductase
1 345 Gene3D G3DSA:3.20.20.70 Aldolase class I
1 345 InterPro IPR013785 Aldolase-type TIM barrel
1 345 FunFam G3DSA:3.20.20.70:FF:000012 GMP reductase
9 338 Pfam PF00478 IMP dehydrogenase / GMP reductase domain
9 338 InterPro IPR001093 IMP dehydrogenase/GMP reductase
2 344 NCBIfam TIGR01305 GMP reductase
2 344 InterPro IPR005993 GMP reductase
176 188 ProSitePatterns PS00487 IMP dehydrogenase / GMP reductase signature.
176 188 InterPro IPR015875 IMP dehydrogenase / GMP reductase, conserved site
1 347 PIRSF PIRSF000235 GMP_reductase
1 347 InterPro IPR005993 GMP reductase
2 345 PANTHER PTHR43170 GMP REDUCTASE
7 344 SMART SM01240 IMPDH_2

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.

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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 · FPocket

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

Site 1 FPocket #13
0.659
Show in viewer
Surrounding area
Site 2 FPocket #11
0.382
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Surrounding area

Binding pockets · P2Rank

Probability: high ≥ 0.5 · medium 0.2–0.49 · low < 0.2

Site 1 P2Rank #1
0.952
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Surrounding area
Site 2 P2Rank #2
0.283
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Surrounding area
Site 3 P2Rank #3
0.155
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Surrounding area
Site 4 P2Rank #4
0.097
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Surrounding area
Site 5 P2Rank #5
0.019
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Surrounding area
Residue sets
UniProt: Active site:186-186 Thioimidate intermediate
UniProt: Binding site:108-131
UniProt: Binding site:181-181
UniProt: Binding site:183-183
UniProt: Binding site:216-239
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_A0A0H3GRS0
AlphaFold DB full sequence Viewing
ColabFold VK055_2464
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.

79 records
Chemistry signal

Structural and bioactivity evidence are both available for this target.

Direct evidence 0 same-protein records
Transferred evidence 29 records from similar proteins
Structural ligands 13 0 loaded crystals
Measured bioactivity 16 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
2EY PDB via homolog 366.8 Da · LogP 3.90 · TPSA 72.8 Open detail RCSB PDB
2F1 PDB via homolog Detail RCSB PDB
2F2 PDB via homolog Detail RCSB PDB
5GP PDB via homolog Detail RCSB PDB
8L1 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
2EY RCSB PDB A0A6L8P2U9 366.8 Da LogP 3.90 TPSA 72.8 ✓ Ro5 ✓ Clean C[C@H](c1cn(nn1)c2ccc(cc2)Cl)OC3=CC(=O)Nc4c3ccc…
2F1 RCSB PDB Q0P9J4 373.3 Da LogP 5.54 TPSA 41.1 1 viol. ✓ Clean CC(=C)c1cccc(c1)C(C)(C)NC(=O)Nc2ccc(cc2)Br
2F2 RCSB PDB Q0P9J4 46.1 Da LogP 0.26 TPSA 9.2 ✓ Ro5 ✓ Clean COC
5GP RCSB PDB Q81JJ9 363.2 Da LogP -2.57 TPSA 206.0 1 viol. ✓ Clean c1nc2c(n1[C@H]3[C@@H]([C@@H]([C@H](O3)COP(=O)(O…
8L1 RCSB PDB A0A6L8P2U9 496.9 Da LogP 6.74 TPSA 86.6 1 viol. ✓ Clean C/C(=N\O)/c1cccc(c1)C(C)(C)NC(=O)Nc2ccc(c(c2)c3…
8L4 RCSB PDB A0A6L8P2U9 346.8 Da LogP 3.70 TPSA 97.2 ✓ Ro5 ✓ Clean [H]/N=C(/c1cccc(c1)C(C)(C)NC(=O)Nc2ccc(cc2)Cl)\…
8LA RCSB PDB A0A6L8P2U9 477.0 Da LogP 3.25 TPSA 120.3 ✓ Ro5 ✓ Clean CC(=C)c1cccc(c1)C(C)(C)NC(=O)Nc2ccc(c(c2)O[C@@H…
C91 RCSB PDB Q0P9J4 378.4 Da LogP 4.89 TPSA 59.8 ✓ Ro5 ✓ Clean c1ccc2cc(ccc2c1)NC(=O)Cn3c4ccccc4nc3c5ccccn5
IMP RCSB PDB A0A6L8P2U9 348.2 Da LogP -2.15 TPSA 180.0 ✓ Ro5 ✓ Clean c1nc2c(n1[C@H]3[C@@H]([C@@H]([C@H](O3)COP(=O)(O…
JQS RCSB PDB A0A6L8P2U9 366.2 Da LogP -2.07 TPSA 209.9 1 viol. ✓ Clean c1nc(c(n1[C@H]2[C@@H]([C@@H]([C@H](O2)COP(=O)(O…
MLI RCSB PDB A0A6L8P2U9 102.0 Da LogP -3.12 TPSA 80.3 ✓ Ro5 ✓ Clean C(C(=O)[O-])C(=O)[O-]
TAR RCSB PDB A0A6L8P2U9 150.1 Da LogP -2.12 TPSA 115.1 ✓ Ro5 ✓ Clean [C@H]([C@@H](C(=O)O)O)(C(=O)O)O
XMP RCSB PDB Q926Y9 365.2 Da LogP -3.44 TPSA 201.2 1 viol. ✓ Clean c1[nH+]c2c(n1[C@H]3[C@@H]([C@@H]([C@H](O3)COP(=…

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.