KpATCC43816 Protein target profile

ribose-phosphate diphosphokinase

Accession: VK055_0212

Gene: prsA AIK78840.1 3D evidence: AlphaFold DB model + ColabFold model Metabolism 4 reactions UniProt A0A0H3GPQ6
Length 312
Pocket druggability (P2Rank · AlphaFold DB model) 0.227
Metabolic reactions 4
Chokepoint No
Direct ligand evidence 0 52 total records
Functional annotation 1 EC 11 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 (%)
59.322 Lower values reduce human off-target concern.
Human E-value
2.18e-19
Gut microbiome similarity
32.0% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

Essential (DEG)
Y
DEG identity (%)
96.795 Higher values support similarity to known essential genes.
DEG E-value
0.0 Smaller values mean stronger essential-gene similarity.

Structure confidence

ColabFold pLDDT
95.45 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) 0.227
Structure A0A0H3GPQ6
Pocket Pocket 1
Druggability (FPocket) 0.325
Structure A0A0H3GPQ6
Pocket Pocket 19
ColabFold model
P2Rank 0.252 · Pocket 1
FPocket 0.586 · Pocket 4
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 1517 / 4744 genomes with a hit
Prevalence 32.0%

Metabolic context

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

Explore metabolic network

Metabolic context: more central than 97.8% of genes in this genome.

Relative network centrality 97.8% more central than 97.8% of genes in this genome
Chokepoint Not a chokepoint
Catalyzed reactions

4 reactions 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.

MKLFAGNATPELAQRIANRLYTSLGDAAVGRFSDGEVSVQINENVRGGDIFIIQSTCAPTNDNLMELVVMVDALRRASAGRITAVIPYFGYARQDRRVRSARVPITAKVVADFLSSVGVDRVLTVDLHAEQIQGFFDVPVDNVFGSPILLEDMLQLNLDNPIVVSPDIGGVVRARAIAKLLNDTDMAIIDKRRPRANVSQVMHIIGDVAGRDCVMVDDMIDTGGTLCKAAEALKERGAKRVFAYATHPIFSGNAIQNIKNSVIDEFVVCDTIPLAPEIKALDKVRTLTLSGMLAEAIRRISNEESISAMFEH

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

1 EC 11 GO

Subcellular localization

Localization
Cytoplasmic

Enzyme Commission (EC)

1

Gene Ontology (GO)

11
  • GO:0004749 Catalysis of the reaction: D-ribose 5-phosphate + ATP = 5-phospho-alpha-D-ribose 1-diphosphate + AMP + 2 H+.
  • GO:0044249 OBSOLETE. The chemical reactions and pathways resulting in the formation of substances, carried out by individual cells.
  • GO:0009165 The chemical reactions and pathways resulting in the formation of nucleotides, any 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).
  • GO:0009156 The chemical reactions and pathways resulting in the formation of a ribonucleoside monophosphate, a compound consisting of a nucleobase linked to a ribose sugar esterified with phosphate on the sugar.
  • GO:0000287 Binding to a magnesium (Mg) ion.
  • GO:0005737 The contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
  • GO:0002189 A protein complex having ribose phosphate diphosphokinase activity.
  • GO:0005524 Binding to ATP, adenosine 5'-triphosphate, a universally important coenzyme and enzyme regulator.
  • GO:0016301 Catalysis of the transfer of a phosphate group, usually from ATP, to a substrate molecule.
  • GO:0006015 The chemical reactions and pathways resulting in the formation of 5-phosphoribose 1-diphosphate, also known as 5-phosphoribosyl-1-pyrophosphate.
  • GO:0006164 The chemical reactions and pathways resulting in the formation of a purine nucleotide, a compound consisting of nucleoside (a purine base linked to a deoxyribose or ribose sugar) esterified with a phosphate group at either the 3' or 5'-hydroxyl group of the sugar.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

23 records
Show feature table
Start End DB Term Name
201 310 Pfam PF14572 Phosphoribosyl synthetase-associated domain
201 310 InterPro IPR005946 Ribose-phosphate pyrophosphokinase
4 152 FunFam G3DSA:3.40.50.2020:FF:000001 Ribose-phosphate pyrophosphokinase
1 118 Pfam PF13793 N-terminal domain of ribose phosphate pyrophosphokinase
1 118 InterPro IPR029099 Ribose-phosphate pyrophosphokinase, N-terminal domain
126 141 ProSitePatterns PS00114 Phosphoribosyl pyrophosphate synthase signature.
126 141 InterPro IPR000842 Phosphoribosyl pyrophosphate synthetase, conserved site
1 312 PANTHER PTHR10210 RIBOSE-PHOSPHATE DIPHOSPHOKINASE FAMILY MEMBER
1 312 InterPro IPR005946 Ribose-phosphate pyrophosphokinase
4 302 Gene3D G3DSA:3.40.50.2020 -
4 302 InterPro IPR029057 Phosphoribosyltransferase-like
1 118 SMART SM01400 Pribosyltran_N_2
145 287 Gene3D G3DSA:3.40.50.2020 -
145 287 InterPro IPR029057 Phosphoribosyltransferase-like
153 287 FunFam G3DSA:3.40.50.2020:FF:000005 Ribose-phosphate pyrophosphokinase 1
1 311 NCBIfam TIGR01251 ribose-phosphate diphosphokinase
1 311 InterPro IPR005946 Ribose-phosphate pyrophosphokinase
1 311 Hamap MF_00583_B Putative ribose-phosphate pyrophosphokinase [prs].
1 311 InterPro IPR037515 Ribose-phosphate pyrophosphokinase, bacterial-type
66 303 SUPERFAMILY SSF53271 PRTase-like
66 303 InterPro IPR029057 Phosphoribosyltransferase-like
146 271 CDD cd06223 PRTases_typeI
146 271 InterPro IPR000836 Phosphoribosyltransferase 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.

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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 · P2Rank

Druggability (P2Rank): high ≥ 0.5 · medium 0.2–0.49 · low < 0.2

Pocket 1 P2Rank #1
0.227
Likely same site as FPocket 2 5.1 Å 12 shared residues 92% of smaller site
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Surrounding area
Pocket 2 P2Rank #2
0.13
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Surrounding area
Pocket 3 P2Rank #3
0.101
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Surrounding area
Pocket 4 P2Rank #4
0.068
Likely same site as FPocket 2 7.1 Å 9 shared residues 69% of smaller site
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Surrounding area
Pocket 5 P2Rank #5
0.018
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Surrounding area

Binding pockets · FPocket

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

Pocket 1 FPocket #19
0.325
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Surrounding area
Pocket 2 FPocket #2
0.244 Unusual size
Likely same site as P2Rank 1 5.1 Å 12 shared residues 92% of smaller site
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Surrounding area
Residue sets
UniProt: Active site:194-194
UniProt: Binding site:131-131
UniProt: Binding site:170-170
UniProt: Binding site:196-196
UniProt: Binding site:220-220
UniProt: Binding site:224-228
UniProt: Binding site:37-39
UniProt: Binding site:96-97
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_A0A0H3GPQ6
AlphaFold DB full sequence Viewing
ColabFold VK055_0212
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.

52 records
Chemistry signal

Structural ligand evidence is available for this target.

Direct evidence 0 same-protein records
Transferred evidence 2 records from similar proteins
Structural ligands 2 0 loaded crystals
Measured bioactivity 0 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
APC PDB via homolog 505.2 Da · LogP -1.52 · TPSA 269.9 Open detail RCSB PDB
R5P PDB via homolog Detail RCSB PDB
ZINC1530556 ZINC proposed compound · Tanimoto 1.000 Detail ZINC
ZINC22116391 ZINC proposed compound · Tanimoto 1.000 Detail ZINC
ZINC3606137 ZINC proposed compound · Tanimoto 1.000 Detail ZINC

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
APC RCSB PDB Q97CA5 505.2 Da LogP -1.52 TPSA 269.9 3 viol. ✓ Clean c1nc(c2c(n1)n(cn2)[C@H]3[C@@H]([C@@H]([C@H](O3)…
R5P RCSB PDB Q58761 230.1 Da LogP -2.62 TPSA 144.5 ✓ Ro5 ✓ Clean C(C(C(C(C=O)O)O)O)OP(=O)(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.