Protein target profile

VK055_0327

pyruvate kinase

Genome: KpATCC43816 Gene: AIK78953.1 pyk2 3D evidence: AlphaFold DB model + ColabFold model Metabolism 4 reactions UniProt A0A0H3GUU1
Length 470
Pocket druggability 0.505
Metabolic reactions 4
Chokepoint No
Direct ligand evidence 0 129 total records
Functional annotation 1 EC 8 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 (%)
56.41 Lower values reduce human off-target concern.
Human E-value
7.25e-09
Gut microbiome similarity
7.3% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

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

Localization

Localization
Cytoplasmic

Structure confidence

ColabFold pLDDT
95.48 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 0.505
Structure A0A0H3GUU1
Pocket Pocket 14
P2Rank 0.839
Structure A0A0H3GUU1
Pocket Pocket 1
ColabFold model
FPocket 0.506 · Pocket 12
P2Rank 0.854 · Pocket 1
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 347 / 4744 genomes with a hit
Prevalence 7.3%

Cross-references

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

Chemistry

ChEMBL CHEMBL3897760 ChEMBL CHEMBL4071498 ChEMBL CHEMBL76232 ChEMBL CHEMBL168461 ChEMBL CHEMBL1094 ChEMBL CHEMBL3335791 ChEMBL CHEMBL3952026 ChEMBL CHEMBL2206712 ChEMBL CHEMBL541209 ChEMBL CHEMBL2206719 ChEMBL CHEMBL2206157 ChEMBL CHEMBL2206709 ChEMBL CHEMBL4299940 ChEMBL P6F ChEMBL CHEMBL2206708 ChEMBL CHEMBL2206710 ChEMBL CHEMBL2206155 ChEMBL CHEMBL1355710 ChEMBL CHEMBL2206154 ChEMBL CHEMBL2206703 ChEMBL CHEMBL2206141 ChEMBL CHEMBL2206702 ChEMBL CHEMBL2206725 ChEMBL CHEMBL2206726 ChEMBL CHEMBL2206722 ChEMBL CHEMBL5179096 ChEMBL CHEMBL2206720 ChEMBL CHEMBL2206174 ChEMBL CHEMBL2206176 ChEMBL CHEMBL2206177 ChEMBL CHEMBL2206159 ChEMBL CHEMBL1091056 ChEMBL CHEMBL2206724 ChEMBL I30 ChEMBL CHEMBL3903225 ChEMBL CHEMBL1348360 ChEMBL CHEMBL2206158 ChEMBL CHEMBL2206139 ChEMBL CHEMBL2206716 ChEMBL CHEMBL2206721 ChEMBL CHEMBL2206171 ChEMBL CHEMBL2206142 ChEMBL CHEMBL2206714 ChEMBL CHEMBL2206706 ChEMBL CHEMBL2206173 ChEMBL CHEMBL1386652 ChEMBL CHEMBL2206705 ChEMBL CHEMBL2206162 ChEMBL CHEMBL2206165 ChEMBL CHEMBL2206715 ChEMBL CHEMBL2206175 ChEMBL CHEMBL2206723 ChEMBL CHEMBL2206180 ChEMBL CHEMBL3924040 ChEMBL CHEMBL2206713 ChEMBL CHEMBL1256516 ChEMBL CHEMBL2206140 ChEMBL CHEMBL2206151 ChEMBL CHEMBL2206144 ChEMBL CHEMBL2206181 ChEMBL CHEMBL4164653 ChEMBL CHEMBL3932979 ChEMBL CHEMBL5618275 ChEMBL CHEMBL2206718 ChEMBL CHEMBL2206183 ChEMBL CHEMBL2206701 ChEMBL CHEMBL3339205 ChEMBL CHEMBL1588121

Metabolic context

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

Explore metabolic network

Metabolic context: more central than 99.6% of genes in this genome.

Relative network centrality 99.6% more central than 99.6% 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.

MKKTKIVCTIGPKTESEEMLTKMLEAGMNVMRLNFSHGDYAEHGQRIQNLRNVMSKTGKKAAILLDTKGPEIRTIKLEGGNDVSLKAGQTFTFTTDKSVIGNNEIVAVTYEGFTSDLAVGNTVLVDDGLIGMEVTAIEGNKVICKVLNNGDLGENKGVNLPGVSIALPALAEKDKQDLIFGCEQGVDFVAASFIRKRSDVVEIREHLKAHGGENIQIISKIENQEGLNNFDEILEASDGIMVARGDMGVEIPVEEVIFAQKMIIEKCIRARKVVITATQMLDSMIKNPRPTRAEAGDVANAILDGTDAVMLSGESAKGKYPLEAVTIMATICERTDRVMTSRLDFNNDNRKLRITEAVCRGAVETAEKLEAPLIVVATQGGKSARAVRKYFPDATILALTTNETTARQLVLSKGVVPQLVEEIASTDDFYHLGKDLALKSGLARKGDVVVMVSGALVPSGTTNTASVHVL

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

1 EC 8 GO

Enzyme Commission (EC)

1

Gene Ontology (GO)

8
  • 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:0030955 Binding to a potassium ion (K+).
  • GO:0004743 Catalysis of the reaction: ADP + H+ + phosphoenolpyruvate = ATP + pyruvate.
  • GO:0000287 Binding to a magnesium (Mg) ion.
  • GO:0006096 The chemical reactions and pathways resulting in the breakdown of a carbohydrate into pyruvate, with the concomitant production of a small amount of ATP and the reduction of NAD(P) to NAD(P)H. Glycolysis begins with the metabolism of a carbohydrate to generate products that can enter the pathway and ends with the production of pyruvate. Pyruvate may be converted to acetyl-coenzyme A, ethanol, lactate, or other small molecules.
  • 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:0006950 Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a disturbance in organismal or cellular homeostasis, usually, but not necessarily, exogenous (e.g. temperature, humidity, ionizing radiation).

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

41 records
Show feature table
Start End DB Term Name
2 452 PANTHER PTHR11817 PYRUVATE KINASE
2 452 InterPro IPR001697 Pyruvate kinase
4 332 Gene3D G3DSA:3.20.20.60 -
4 332 InterPro IPR040442 Pyruvate kinase-like domain superfamily
336 466 Gene3D G3DSA:3.40.1380.20 -
336 466 InterPro IPR036918 Pyruvate kinase, C-terminal domain superfamily
155 335 FunFam G3DSA:3.20.20.60:FF:000001 Pyruvate kinase
2 469 NCBIfam TIGR01064 pyruvate kinase
2 469 InterPro IPR001697 Pyruvate kinase
70 166 SUPERFAMILY SSF50800 PK beta-barrel domain-like
70 166 InterPro IPR011037 Pyruvate kinase-like, insert domain superfamily
215 227 ProSitePatterns PS00110 Pyruvate kinase active site signature.
215 227 InterPro IPR018209 Pyruvate kinase, active site
70 168 FunFam G3DSA:2.40.33.10:FF:000001 Pyruvate kinase
1 339 SUPERFAMILY SSF51621 Phosphoenolpyruvate/pyruvate domain
1 339 InterPro IPR015813 Pyruvate/Phosphoenolpyruvate kinase-like domain superfamily
336 466 FunFam G3DSA:3.40.1380.20:FF:000003 Pyruvate kinase
1 341 Pfam PF00224 Pyruvate kinase, barrel domain
1 341 InterPro IPR015793 Pyruvate kinase, barrel
1 470 CDD cd00288 Pyruvate_Kinase
1 470 InterPro IPR001697 Pyruvate kinase
356 468 Pfam PF02887 Pyruvate kinase, alpha/beta domain
356 468 InterPro IPR015795 Pyruvate kinase, C-terminal
323 469 SUPERFAMILY SSF52935 PK C-terminal domain-like
323 469 InterPro IPR036918 Pyruvate kinase, C-terminal domain superfamily
59 75 PRINTS PR01050 Pyruvate kinase family signature
59 75 InterPro IPR001697 Pyruvate kinase
186 200 PRINTS PR01050 Pyruvate kinase family signature
186 200 InterPro IPR001697 Pyruvate kinase
244 268 PRINTS PR01050 Pyruvate kinase family signature
244 268 InterPro IPR001697 Pyruvate kinase
294 312 PRINTS PR01050 Pyruvate kinase family signature
294 312 InterPro IPR001697 Pyruvate kinase
313 329 PRINTS PR01050 Pyruvate kinase family signature
313 329 InterPro IPR001697 Pyruvate kinase
217 243 PRINTS PR01050 Pyruvate kinase family signature
217 243 InterPro IPR001697 Pyruvate kinase
269 293 PRINTS PR01050 Pyruvate kinase family signature
269 293 InterPro IPR001697 Pyruvate kinase
71 167 Gene3D G3DSA:2.40.33.10 -
71 167 InterPro IPR015806 Pyruvate kinase, insert 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.

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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 #14
0.505
Likely same site as P2Rank 1 7.1 Å 14 shared residues 100% of smaller site
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Surrounding area
Site 2 FPocket #24
0.403
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Surrounding area
Site 3 FPocket #3
0.204
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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
0.839
Likely same site as FPocket 14 7.1 Å 14 shared residues 100% of smaller site
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Surrounding area
Site 2 P2Rank #2
0.293
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Surrounding area
Site 3 P2Rank #3
0.2
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Surrounding area
Site 4 P2Rank #4
0.084
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Surrounding area
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_A0A0H3GUU1
AlphaFold DB full sequence Viewing
ColabFold VK055_0327
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.

129 records
Chemistry signal

Structural and bioactivity evidence are both available for this target.

Direct evidence 0 same-protein records
Transferred evidence 79 records from similar proteins
Structural ligands 11 0 loaded crystals
Measured bioactivity 68 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
09C PDB via homolog 488.2 Da · LogP 4.68 · TPSA 72.7 Open detail RCSB PDB
7Y0 PDB via homolog Detail RCSB PDB
B3P PDB via homolog Detail RCSB PDB
ETE PDB via homolog Detail RCSB PDB
FBP 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
09C RCSB PDB Q6GG09 488.2 Da LogP 4.68 TPSA 72.7 ✓ Ro5 ✓ Clean c1cc2c(cc1Br)[nH]cc2[C@H]3C(=O)NCC(N3)c4c[nH]c5…
7Y0 RCSB PDB P14618 620.3 Da LogP 5.60 TPSA 102.2 2 viol. ✓ Clean Cn1cc(cc1C(=O)NCCNC(=O)c2cc(cn2C)C(=O)c3cccc(c3…
B3P RCSB PDB P14618 282.3 Da LogP -4.01 TPSA 145.4 1 viol. ✓ Clean C(CNC(CO)(CO)CO)CNC(CO)(CO)CO
ETE RCSB PDB P11974 208.3 Da LogP -0.33 TPSA 57.2 ✓ Ro5 ✓ Clean COCCOCCOCCOCCO
FBP RCSB PDB P14618 340.1 Da LogP -2.99 TPSA 203.4 1 viol. ✓ Clean C([C@@H]1[C@H]([C@@H]([C@](O1)(COP(=O)(O)O)O)O)…
FLC RCSB PDB P30613-2 189.1 Da LogP -5.25 TPSA 140.6 ✓ Ro5 ✓ Clean C(C(=O)[O-])C(CC(=O)[O-])(C(=O)[O-])O
MLI RCSB PDB P14618 102.0 Da LogP -3.12 TPSA 80.3 ✓ Ro5 ✓ Clean C(C(=O)[O-])C(=O)[O-]
NZT RCSB PDB P14618 474.5 Da LogP 2.79 TPSA 108.4 ✓ Ro5 ✓ Clean c1cc2cccnc2c(c1)S(=O)(=O)Nc3ccc(cc3)C(=O)N4CCN(…
OXL RCSB PDB P11974 88.0 Da LogP -3.51 TPSA 80.3 ✓ Ro5 ✓ Clean C(=O)(C(=O)[O-])[O-]
PEQ RCSB PDB P11974 170.1 Da LogP -0.43 TPSA 104.1 ✓ Ro5 ✓ Clean C[C@@H](C(=O)O)OP(=O)(O)O
PYR RCSB PDB P11974 88.1 Da LogP -0.34 TPSA 54.4 ✓ Ro5 ✓ Clean CC(=O)C(=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.