KpATCC43816 Protein target profile

2-succinyl-5-enolpyruvyl-6-hydroxy-3- cyclohexene-1-carboxylic-acid synthase

Accession: VK055_4853

Gene: AIK83380.1 menD 3D evidence: AlphaFold DB model + ColabFold model Metabolism 1 reaction UniProt A0A0H3GVP4
Length 556
Pocket druggability (P2Rank · AlphaFold DB model) 0.619
Metabolic reactions 1
Chokepoint Yes
Direct ligand evidence 0 58 total records
Functional annotation 1 EC 6 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
No hit
Gut microbiome similarity
2.2% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

Essential (DEG)
Y
DEG identity (%)
48.233 Higher values support similarity to known essential genes.
DEG E-value
2.06e-180 Smaller values mean stronger essential-gene similarity.

Structure confidence

ColabFold pLDDT
97.82 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) 0.619
Structure A0A0H3GVP4
Pocket Pocket 1
Druggability (FPocket) 0.729
Structure A0A0H3GVP4
Pocket Pocket 14
ColabFold model
P2Rank 0.643 · Pocket 1
FPocket 0.849 · Pocket 11
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 104 / 4744 genomes with a hit
Prevalence 2.2%

Metabolic context

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

Explore metabolic network

Attractive metabolic target: catalyzes a producing chokepoint reaction in Ubiquinone and other terpenoid-quinone biosynthesis, no isoenzyme backup detected, more central than 94.9% of genes in this genome, no human homolog detected.

Relative network centrality 94.9% more central than 94.9% 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.

MSVSAFNRRWAAVILEALTRHGVQHICIAPGSRSTPLTLAAAENRAFIHHTHFDERGLGHLALGLAKASRQPVAVIVTSGTATANLYPALIEAGLTGEKLILLTADRPPELIDCGANQAIRQPGMFASHPAQTISLPRPSQDIPARWLVSTIDQALGALHAGGVHINCPFAEPLYGDMDETGVEWQQQLGNWWQSDKPWLRQALQLESEKQRDWFFWRQKRGVVVAGRMSAAEGKKVAEWAQTLGWPLIGDVLSQTGQPLPCADLWLGNGKAVSELAQAQIVVQLGSSLTGKRVLQWQATCEPDEYWLVDNLPGRLDPAQHRGRRLLSSVERWLELHPAEKRQPWATVIPQLAGQAWQAAVASNEPFGEAQLAQRIRGYLPEQGQLFVGNSLVVRLIDALAQLPAGYPVYSNRGASGIDGLIATAAGVQRASARPTLAIVGDLSALYDLNSLALLRQASAPLVLIVVNNNGGQIFSMLPTPQDERRQFYLMPQDVDFSHAAAMFGLAYHRPDDWPSLDEALAGAWRRAGATVIELAVNETDGAQTLQQLLAQVSRL

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

1 EC 6 GO

Subcellular localization

Localization
Unknown

Enzyme Commission (EC)

1

Gene Ontology (GO)

6
  • 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:0030976 Binding to thiamine pyrophosphate, the diphosphoric ester of thiamine. Acts as a coenzyme of several (de)carboxylases, transketolases, and alpha-oxoacid dehydrogenases.
  • GO:0070204 Catalysis of the reaction: 2-oxoglutarate + H+ + isochorismate = 5-enolpyruvoyl-6-hydroxy-2-succinyl-cyclohex-3-ene-1-carboxylate + CO2.
  • GO:0009234 The chemical reactions and pathways resulting in the formation of any of the menaquinones. Structurally, menaquinones consist of a methylated naphthoquinone ring structure and side chains composed of a variable number of unsaturated isoprenoid residues. Menaquinones that have vitamin K activity and are known as vitamin K2.
  • GO:0000287 Binding to a magnesium (Mg) ion.
  • GO:0030145 Binding to a manganese ion (Mn).

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

23 records
Show feature table
Start End DB Term Name
4 553 Hamap MF_01659 2-succinyl-5-enolpyruvyl-6-hydroxy-3-cyclohexene-1-carboxylate synthase [menD].
4 553 InterPro IPR004433 2-succinyl-5-enolpyruvyl-6-hydroxy-3-cyclohexene-1-carboxylic-acid synthase
10 430 NCBIfam TIGR00173 2-succinyl-5-enolpyruvyl-6-hydroxy-3-cyclohexene-1-carboxylic-acid synthase
10 430 InterPro IPR004433 2-succinyl-5-enolpyruvyl-6-hydroxy-3-cyclohexene-1-carboxylic-acid synthase
1 196 FunFam G3DSA:3.40.50.970:FF:000029 2-succinyl-5-enolpyruvyl-6-hydroxy-3-cyclohexene-1-carboxylate synthase
414 534 Pfam PF02775 Thiamine pyrophosphate enzyme, C-terminal TPP binding domain
414 534 InterPro IPR011766 Thiamine pyrophosphate enzyme, TPP-binding
1 196 Gene3D G3DSA:3.40.50.970 -
184 388 Pfam PF16582 Middle domain of thiamine pyrophosphate
184 388 InterPro IPR032264 Menaquinone biosynthesis protein MenD, middle domain
348 556 Gene3D G3DSA:3.40.50.970 -
362 552 SUPERFAMILY SSF52518 Thiamin diphosphate-binding fold (THDP-binding)
362 552 InterPro IPR029061 Thiamin diphosphate-binding fold
5 550 PANTHER PTHR42916 2-SUCCINYL-5-ENOLPYRUVYL-6-HYDROXY-3-CYCLOHEXENE-1-CARBOXYLATE SYNTHASE
12 170 CDD cd07037 TPP_PYR_MenD
11 130 Pfam PF02776 Thiamine pyrophosphate enzyme, N-terminal TPP binding domain
11 130 InterPro IPR012001 Thiamine pyrophosphate enzyme, N-terminal TPP-binding domain
7 174 SUPERFAMILY SSF52518 Thiamin diphosphate-binding fold (THDP-binding)
7 174 InterPro IPR029061 Thiamin diphosphate-binding fold
367 538 CDD cd02009 TPP_SHCHC_synthase
1 556 PIRSF PIRSF004983 MenD
1 556 InterPro IPR004433 2-succinyl-5-enolpyruvyl-6-hydroxy-3-cyclohexene-1-carboxylic-acid synthase
212 337 Gene3D G3DSA:3.40.50.1220 -

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
0.619
Likely same site as FPocket 3 1.6 Å 17 shared residues 85% of smaller site
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Surrounding area
Pocket 2 P2Rank #2
0.517
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Surrounding area
Pocket 3 P2Rank #3
0.057
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Surrounding area
Pocket 4 P2Rank #4
0.047
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Surrounding area
Pocket 5 P2Rank #5
0.012
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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 #14
0.729
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Surrounding area
Pocket 2 FPocket #3
0.637
Likely same site as P2Rank 1 1.6 Å 17 shared residues 85% of smaller site
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Surrounding area
Pocket 3 FPocket #15
0.421
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Surrounding area
Pocket 4 FPocket #27
0.362
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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_A0A0H3GVP4
AlphaFold DB full sequence Viewing
ColabFold VK055_4853
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 6 0 loaded crystals
Measured bioactivity 2 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
AKG PDB via homolog 146.1 Da · LogP -0.50 · TPSA 91.7 Open detail RCSB PDB
DNA PDB via homolog Detail RCSB PDB
ISC PDB via homolog Detail RCSB PDB
TD5 PDB via homolog Detail RCSB PDB
TD6 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
AKG RCSB PDB P17109 146.1 Da LogP -0.50 TPSA 91.7 ✓ Ro5 ✓ Clean C(CC(=O)O)C(=O)C(=O)O
DNA RCSB PDB P9WK11 204.2 Da LogP 1.95 TPSA 77.8 ✓ Ro5 ✓ Clean c1ccc2c(c1)c(cc(c2O)C(=O)O)O
ISC RCSB PDB P9WK11 226.2 Da LogP -0.09 TPSA 104.1 ✓ Ro5 ✓ Clean C=C(C(=O)O)O[C@H]1C=CC=C([C@@H]1O)C(=O)O
TD5 RCSB PDB P17109 527.4 Da LogP 0.74 TPSA 226.5 2 viol. ✓ Clean Cc1c(sc([n+]1Cc2cnc(nc2N)C)[C@@H](CCC(=O)O)O)CC…
TD6 RCSB PDB P17109 527.4 Da LogP 0.74 TPSA 226.5 2 viol. ✓ Clean Cc1c(sc([n+]1Cc2cnc(nc2N)C)[C@H](CCC(=O)O)O)CCO…
TOI RCSB PDB P9WK11 753.6 Da LogP -0.04 TPSA 331.3 3 viol. ✓ Clean [H]/N=C/1\C(=CNC(=N1)C)C[n+]2c(c(sc2[C@](CCC(=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.