Protein target profile

VK055_0608

muconate cycloisomerase

Genome: KpATCC43816 Gene: AIK79231.1 catB 3D evidence: Experimental + ColabFold model Metabolism 1 reaction UniProt A6T9N5
Length 372
Pocket druggability 0.804
Metabolic reactions 1
Chokepoint Yes
Direct ligand evidence 0 54 total records
Functional annotation 0 EC 4 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
0.7% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

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

Localization

Localization
Unknown

Structure confidence

ColabFold pLDDT
97.3 0-100 confidence; >70 supports local structural interpretation.

Binding-site evidence

PDB experimental structure

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 0.804
Structure 3FCP
Pocket Pocket 2
P2Rank 0.722
Structure 3FCP
Pocket Pocket 1
ColabFold model
FPocket 0.349 · Pocket 16
P2Rank 0.409 · Pocket 1
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 35 / 4744 genomes with a hit
Prevalence 0.7%

Cross-references

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

Structure

Metabolic context

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

Explore metabolic network

Attractive metabolic target: catalyzes a producing & consuming chokepoint reaction, no isoenzyme backup detected, more central than 94.5% of genes in this genome, no human homolog detected.

Relative network centrality 94.5% more central than 94.5% of genes in this genome
Chokepoint Chokepoint gene
Pathways

No specific KEGG pathway assigned - this reaction either has no KEGG mapping, or only matches a generic overview map with no route-level information.

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.

MTATVEQIESWIVDVPTIRPHKLSMTTMGCQSLVIVRLTRSDGICGIGEATTIGGLSYGVESPEAISSAITHYLTPLLKGQPADNLNALTARMNGAIKGNTFAKSAIETALLDAQGKALGLPVSALLGGALQTALPVLWTLASGDTAKDIAEGEKLLAEGRHRAFKLKIGARELATDLRHTRAIVEALGDRASIRVDVNQAWDAATGAKGCRELAAMGVDLIEQPVSAHDNAALVRLSQQIETAILADEAVATAYDGYQLAQQGFTGAYALKIAKAGGPNSVLALARVAQAAGIGLYGGTMLEGTVGTVASLHAWSTLPLQWGTEMFGPLLLKDDIVSVPLTFADGQVALPQTPGLGVELDEDKLHFYTRQP

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

4 GO

Gene Ontology (GO)

4
  • GO:0030145 Binding to a manganese ion (Mn).
  • GO:0009063 The chemical reactions and pathways resulting in the breakdown of amino acids, organic acids containing one or more amino substituents.
  • GO:0018849 Catalysis of the reaction: 2,5-dihydro-5-oxofuran-2-acetate = cis,cis-hexadienedioate.
  • GO:0018850 Catalysis of the reaction: 2-chloro-2,5-dihydro-5-oxofuran-2-acetate = 3-chloro-cis,cis-muconate.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

24 records
Show feature table
Start End DB Term Name
4 129 SUPERFAMILY SSF54826 Enolase N-terminal domain-like
4 129 InterPro IPR029017 Enolase-like, N-terminal
6 371 NCBIfam TIGR02534 muconate/chloromuconate family cycloisomerase
6 371 InterPro IPR013370 Muconate/chloromuconate cycloisomerase
2 371 SFLD SFLDG01258 (chloro)muconate cycloisomerase (syn) like
2 371 InterPro IPR013370 Muconate/chloromuconate cycloisomerase
121 355 Gene3D G3DSA:3.20.20.120 -
121 355 InterPro IPR036849 Enolase-like, C-terminal domain superfamily
33 365 Gene3D G3DSA:3.30.390.10 -
33 365 InterPro IPR029017 Enolase-like, N-terminal
154 363 Pfam PF13378 Enolase C-terminal domain-like
154 363 InterPro IPR029065 Enolase C-terminal domain-like
147 244 SMART SM00922 MR_MLE_2
147 244 InterPro IPR013342 Mandelate racemase/muconate lactonizing enzyme, C-terminal
2 371 SFLD SFLDG00180 muconate cycloisomerase
116 371 SUPERFAMILY SSF51604 Enolase C-terminal domain-like
116 371 InterPro IPR036849 Enolase-like, C-terminal domain superfamily
9 128 Pfam PF02746 Mandelate racemase / muconate lactonizing enzyme, N-terminal domain
9 128 InterPro IPR013341 Mandelate racemase/muconate lactonizing enzyme, N-terminal domain
2 366 PANTHER PTHR48073 O-SUCCINYLBENZOATE SYNTHASE-RELATED
103 128 ProSitePatterns PS00908 Mandelate racemase / muconate lactonizing enzyme family signature 1.
103 128 InterPro IPR018110 Mandelate racemase/muconate lactonizing enzyme, conserved site
4 365 CDD cd03318 MLE
4 365 InterPro IPR013370 Muconate/chloromuconate cycloisomerase

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 #2
0.804
Likely same site as P2Rank 1 6.5 Å 17 shared residues 81% of smaller site
Unusual size
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Surrounding area
Site 2 FPocket #19
0.236
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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
0.722
Likely same site as FPocket 2 6.5 Å 17 shared residues 81% of smaller site
Show in viewer
Surrounding area
Site 2 P2Rank #2
0.19
Show in viewer
Surrounding area
Site 3 P2Rank #3
0.118
Show in viewer
Surrounding area
Site 4 P2Rank #4
0.005
Likely same site as FPocket 2 6.7 Å 6 shared residues 100% of smaller site
Show in viewer
Surrounding area
Site 5 P2Rank #5
0.002
Show in viewer
Surrounding area
All structural evidence 1 experimental · 1 predicted

Structural evidence

1 + 1

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
PDB 3FCP
X-ray A Viewing
ColabFold VK055_0608
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.

54 records
Chemistry signal

Structural ligand evidence is available for this target.

Direct evidence 0 same-protein records
Transferred evidence 4 records from similar proteins
Structural ligands 4 0 loaded crystals
Measured bioactivity 0 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
MUC PDB via homolog 142.1 Da · LogP -0.06 · TPSA 63.6 Open detail RCSB PDB
NLQ PDB via homolog Detail RCSB PDB
NSK PDB via homolog Detail RCSB PDB
SUG PDB via homolog Detail RCSB PDB
ZINC2558958 ZINC proposed compound · Tanimoto 0.750 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
MUC RCSB PDB A0QTN8 142.1 Da LogP -0.06 TPSA 63.6 ✓ Ro5 ✓ Clean C1=CC(=O)O[C@H]1CC(=O)O
NLQ RCSB PDB Q9RYA6 188.2 Da LogP -1.16 TPSA 109.5 ✓ Ro5 ✓ Clean CC(=O)N[C@@H](CCC(=O)N)C(=O)O
NSK RCSB PDB Q81IL5 246.3 Da LogP -0.45 TPSA 129.7 ✓ Ro5 ✓ Clean C(CCN)C[C@@H](C(=O)O)NC(=O)CCC(=O)O
SUG RCSB PDB Q81IL5 274.3 Da LogP -1.32 TPSA 165.6 1 viol. ✓ Clean C(C[C@@H](C(=O)O)NC(=O)CCC(=O)O)CNC(=N)N

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.