Protein target profile

VK055_4808

folyl-polyglutamate synthetase

Genome: KpATCC43816 Gene: folC AIK83335.1 3D evidence: AlphaFold DB model + ColabFold model Metabolism 1 reaction UniProt A0A0H3GVS7
Length 422
Pocket druggability 0.93
Metabolic reactions 1
Chokepoint Yes
Direct ligand evidence 0 58 total records
Functional annotation 0 EC 10 GO
Target summary

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.

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 (%)
37.43 Lower values reduce human off-target concern.
Human E-value
2.5000000000000002e-29
Gut microbiome similarity
2.9% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

Essential (DEG)
Y
DEG identity (%)
80.769 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
95.62 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 0.93
Structure A0A0H3GVS7
Pocket Pocket 3
P2Rank 0.967
Structure A0A0H3GVS7
Pocket Pocket 1
ColabFold model
FPocket 0.905 · Pocket 19
P2Rank 0.98 · Pocket 1
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 139 / 4744 genomes with a hit
Prevalence 2.9%

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

Attractive metabolic target: catalyzes a consuming chokepoint reaction in Folate biosynthesis, no isoenzyme backup detected, more central than 89.6% of genes in this genome.

Relative network centrality 89.6% more central than 89.6% of genes in this genome
Chokepoint Chokepoint gene
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.

MEKDPIPQATSPLATWLSYLEHLHSKTIDLGLARVSEVAGQMDIVKPAPFVFTVAGTNGKGTTCRTLETILMAAGYKVGVYSSPHLVRYTERVRIQGAELPEAAHTASFAEIEAARGDISLTYFEYGTLSALWLFKQAQLDVVILEVGLGGRLDATNIVDADVAVVTSIALDHTDWLGPDRESIGREKAGIFRAGKPAVVGEPDMPLTIAEVASEKGALLQRRGVDWRYEVEGETWSFRDTAGALSHLPLPQVPLPNAATAVAALRASGLAVDDAILRAGIRDAMLPGRFQIISDAPRVILDVAHNPHAAAYLAGRLKTLAKTGRVLAVIGMLHDKDIAGTLANLAPEVDAWYCAPLEGPRGAAAEQLVEHLRCGTVYSSVAQAWRAAMADAKVEDTVLVCGSFHTVAQVMEEIDAGRIGGE

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

10 GO

Gene Ontology (GO)

10
  • GO:0005524 Binding to ATP, adenosine 5'-triphosphate, a universally important coenzyme and enzyme regulator.
  • GO:0016881 Catalysis of the ligation of an acid to an amino acid via a carbon-nitrogen bond, with the concomitant hydrolysis of the diphosphate bond in ATP or a similar triphosphate.
  • GO:0009396 The chemical reactions and pathways resulting in the formation of folic acid and its derivatives.
  • GO:0004326 Catalysis of the reaction: ATP + tetrahydrofolyl-(Glu)(n) + L-glutamate = ADP + phosphate + tetrahydrofolyl-(Glu)(n+1).
  • GO:0009058 A cellular process consisting of the biochemical pathways by which a living organism synthesizes chemical substances. This typically represents the energy-requiring part of metabolism in which simpler substances are transformed into more complex ones.
  • GO:0005737 The contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
  • GO:0008841 Catalysis of the reaction: ATP + dihydropterate + L-glutamate = ADP + phosphate + dihydrofolate.
  • GO:0046872 Binding to a metal ion.
  • GO:0046656 The chemical reactions and pathways resulting in the formation of folic acid, pteroylglutamic acid.
  • GO:0046654 The chemical reactions and pathways resulting in the formation of tetrahydrofolate, 5,6,7,8-tetrahydrofolic acid, a folate derivative bearing additional hydrogens on the pterin group.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

24 records
Show feature table
Start End DB Term Name
144 159 ProSitePatterns PS01012 Folylpolyglutamate synthase signature 2.
144 159 InterPro IPR018109 Folylpolyglutamate synthetase, conserved site
286 413 SUPERFAMILY SSF53244 MurD-like peptide ligases, peptide-binding domain
286 413 InterPro IPR036615 Mur ligase, C-terminal domain superfamily
13 284 SUPERFAMILY SSF53623 MurD-like peptide ligases, catalytic domain
13 284 InterPro IPR036565 Mur-like, catalytic domain superfamily
54 196 Pfam PF08245 Mur ligase middle domain
54 196 InterPro IPR013221 Mur ligase, central
287 354 Pfam PF02875 Mur ligase family, glutamate ligase domain
287 354 InterPro IPR004101 Mur ligase, C-terminal
52 75 ProSitePatterns PS01011 Folylpolyglutamate synthase signature 1.
52 75 InterPro IPR018109 Folylpolyglutamate synthetase, conserved site
7 418 PIRSF PIRSF001563 Folylpolyglu_synth
7 418 InterPro IPR001645 Folylpolyglutamate synthetase
29 346 PANTHER PTHR11136 FOLYLPOLYGLUTAMATE SYNTHASE-RELATED
29 346 InterPro IPR001645 Folylpolyglutamate synthetase
288 416 FunFam G3DSA:3.90.190.20:FF:000005 Dihydrofolate synthase/folylpolyglutamate synthase
288 420 Gene3D G3DSA:3.90.190.20 -
288 420 InterPro IPR036615 Mur ligase, C-terminal domain superfamily
32 413 NCBIfam TIGR01499 bifunctional protein FolC
32 413 InterPro IPR001645 Folylpolyglutamate synthetase
8 287 FunFam G3DSA:3.40.1190.10:FF:000004 Dihydrofolate synthase/folylpolyglutamate synthase
3 287 Gene3D G3DSA:3.40.1190.10 -
3 287 InterPro IPR036565 Mur-like, catalytic 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 #3
0.93
Likely same site as P2Rank 1 4.2 Å 33 shared residues 92% of smaller site
Unusual size
Show in viewer
Surrounding area
Site 2 FPocket #10
0.638
Unusual size
Show in viewer
Surrounding area
Site 3 FPocket #6
0.243
Unusual size
Show in viewer
Surrounding area

Binding pockets · P2Rank

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

Site 1 P2Rank #1
0.967
Likely same site as FPocket 3 4.2 Å 33 shared residues 92% of smaller site
Show in viewer
Surrounding area
Site 2 P2Rank #2
0.007
Likely same site as FPocket 3 7.7 Å 5 shared residues 50% of smaller site
Show in viewer
Surrounding area
Site 3 P2Rank #3
0.0
Show in viewer
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_A0A0H3GVS7
AlphaFold DB full sequence Viewing
ColabFold VK055_4808
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.

58 records
Chemistry signal

Structural and bioactivity evidence are both available for this target.

Direct evidence 0 same-protein records
Transferred evidence 8 records from similar proteins
Structural ligands 7 0 loaded crystals
Measured bioactivity 1 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
ACP PDB via homolog 505.2 Da · LogP -1.52 · TPSA 269.9 Open detail RCSB PDB
ACQ PDB via homolog Detail RCSB PDB
ANP PDB via homolog Detail RCSB PDB
PD8 PDB via homolog Detail RCSB PDB
POP 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
ACP RCSB PDB P15925 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)…
ACQ RCSB PDB P15925 585.2 Da LogP -1.40 TPSA 316.4 3 viol. ✓ Clean c1nc(c2c(n1)n(cn2)[C@H]3[C@@H]([C@@H]([C@H](O3)…
ANP RCSB PDB A0A5P8YIK0 506.2 Da LogP -2.06 TPSA 281.9 3 viol. ✓ Clean c1nc(c2c(n1)n(cn2)[C@H]3[C@@H]([C@@H]([C@H](O3)…
PD8 RCSB PDB P08192 392.3 Da LogP 0.16 TPSA 193.4 ✓ Ro5 ✓ Clean c1cc(ccc1C(=O)OP(=O)(O)O)NCc2cnc3c(n2)C(=O)NC(=…
POP RCSB PDB P15925 176.0 Da LogP -2.08 TPSA 129.9 ✓ Ro5 ✓ Clean O[P@@](=O)([O-])O[P@@](=O)(O)[O-]
TLA RCSB PDB Q8D0U0 150.1 Da LogP -2.12 TPSA 115.1 ✓ Ro5 ✓ Clean [C@@H]([C@H](C(=O)O)O)(C(=O)O)O
TMF RCSB PDB P15925 455.4 Da LogP -0.23 TPSA 194.3 ✓ Ro5 ✓ Clean c1cc(ccc1C(=O)N[C@H](CCC(=O)O)C(=O)O)[N@@]2C[C@…

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.