KpATCC43816 Protein target profile

glycosyl hydrolases 18 family protein

Accession: VK055_1259

Gene: AIK79882.1 3D evidence: Experimental + ColabFold model Metabolism Not in network UniProt A6T7R3
Length 417
Pocket druggability (P2Rank · Experimental) 0.939
Direct ligand evidence 0 155 total records
Functional annotation 0 EC 3 GO
Target summary

Target candidate with partial support; inspect missing evidence before prioritizing.

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 (%)
36.842 Lower values reduce human off-target concern.
Human E-value
5.07e-07
Gut microbiome similarity
0.9% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

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

Structure confidence

ColabFold pLDDT
95.62 0-100 confidence; >70 supports local structural interpretation.

Binding-site evidence

PDB experimental structure

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) 0.939
Structure 3QOK
Pocket Pocket 1
Druggability (FPocket) 0.339
Structure 3QOK
Pocket Pocket 8
ColabFold model
P2Rank 0.943 · Pocket 1
FPocket 0.111 · Pocket 21
Core conservation Accessory gene
Roary core
CoreCruncher accessory
Gut microbiome 42 / 4744 genomes with a hit
Prevalence 0.9%

Metabolic context

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

This protein is not associated with the imported metabolic network for this genome.

Browse the genome's metabolic network

Imported from KpATCC43816.sbml · 2026-07-09

Sequence

Primary amino-acid sequence viewer.

MKRLPLLAALPLLCASALSAQPLMSVGYFNGGGDVTAGPGGDIDKLDVRQITHLNYSFGLIYNDEKDETNAALKDPAHLHEIWLSPKVQADLQKLPALRKQNPDLKVLLSVGGWGARGFSGAAATAESRAVFIRSAQKIIQQYGLDGIDLDWEFPVNGAWGLVASQPADRDNFTALLKSLREAVGEQKLVTIAVGANAESPKSWVDVKAVAPVLNYINLMTYDMAYGTQYFNSNLYDSSHWPTVAAADKYSADFVVNNYLAAGLKPSQMNLGIGFYGRVPKRAVEPGIDWTKADAQNNPVTQPYFGPQQIALFASLGYDLSKDTYVKYNDIVGKLLNDPQKRFTEHWDDEAKVPWLSVQSAEGKPLFALSYENPRSVAIKADYIEAKGLAGAMFWEYGADDQNQLARQLAESLGIKH

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

3 GO

Subcellular localization

Localization
Unknown

Gene Ontology (GO)

3
  • GO:0004553 Catalysis of the hydrolysis of any O-glycosyl bond.
  • GO:0005975 The chemical reactions and pathways involving carbohydrates, any of a group of organic compounds based of the general formula Cx(H2O)y.
  • GO:0008061 Binding to chitin, a linear polysaccharide consisting of beta-(1->4)-linked N-acetyl-D-glucosamine residues.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

24 records
Show feature table
Start End DB Term Name
25 400 CDD cd06548 GH18_chitinase
1 20 Phobius SIGNAL_PEPTIDE Signal peptide region
4 15 Phobius SIGNAL_PEPTIDE_H_REGION Hydrophobic region of a signal peptide.
145 153 ProSitePatterns PS01095 Glycosyl hydrolases family 18 (GH18) active site signature.
145 153 InterPro IPR001579 Glycosyl hydrolases family 18 (GH18) active site
16 20 Phobius SIGNAL_PEPTIDE_C_REGION C-terminal region of a signal peptide.
26 400 Pfam PF00704 Glycosyl hydrolases family 18
26 400 InterPro IPR001223 Glycoside hydrolase family 18, catalytic domain
20 403 SUPERFAMILY SSF51445 (Trans)glycosidases
20 403 InterPro IPR017853 Glycoside hydrolase superfamily
21 417 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
289 356 SUPERFAMILY SSF54556 Chitinase insertion domain
289 356 InterPro IPR029070 Chitinase insertion domain superfamily
1 20 SignalP_EUK SignalP-noTM SignalP-noTM
278 371 Gene3D G3DSA:3.10.50.10 -
278 371 InterPro IPR029070 Chitinase insertion domain superfamily
1 17 SignalP_GRAM_POSITIVE SignalP-TM SignalP-TM
42 412 PANTHER PTHR11177 CHITINASE
18 417 Gene3D G3DSA:3.20.20.80 Glycosidases
23 400 SMART SM00636 2g34
23 400 InterPro IPR011583 Chitinase II
23 416 ProSiteProfiles PS51910 Glycosyl hydrolases family 18 (GH18) domain profile.
23 416 InterPro IPR001223 Glycoside hydrolase family 18, catalytic domain
1 3 Phobius SIGNAL_PEPTIDE_N_REGION N-terminal region of a signal peptide.

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
0.939
Likely same site as FPocket 8 2.4 Å 17 shared residues 94% of smaller site
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Surrounding area
Pocket 2 P2Rank #2
0.132
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Surrounding area
Pocket 3 P2Rank #3
0.035
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Surrounding area
Pocket 4 P2Rank #4
0.016
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Surrounding area
Pocket 5 P2Rank #5
0.007
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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 #8
0.339 Unusual size
Likely same site as P2Rank 1 2.4 Å 17 shared residues 94% of smaller site
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 3QOK
X-ray A Viewing
ColabFold VK055_1259
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.

155 records
Chemistry signal

Structural and bioactivity evidence are both available for this target.

Direct evidence 0 same-protein records
Transferred evidence 105 records from similar proteins
Structural ligands 5 0 loaded crystals
Measured bioactivity 100 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
AO3 PDB via homolog 622.6 Da · LogP -6.05 · TPSA 261.6 Open detail RCSB PDB
BTB PDB via homolog Detail RCSB PDB
EA9 PDB via homolog Detail RCSB PDB
EAF PDB via homolog Detail RCSB PDB
MXE 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
AO3 RCSB PDB A8GFD6 622.6 Da LogP -6.05 TPSA 261.6 3 viol. ✓ Clean CC(=O)N[C@@H]1[C@@H]([C@@H]([C@H](O[C@H]1O[C@@H…
BTB RCSB PDB Q11174 209.2 Da LogP -3.01 TPSA 104.4 ✓ Ro5 ✓ Clean C(CO)N(CCO)C(CO)(CO)CO
EA9 RCSB PDB Q11174 470.5 Da LogP 4.72 TPSA 100.6 ✓ Ro5 ✓ Clean CCCOc1ccc(cc1OC)[C@@H]2c3c(n[nH]c3C(=O)N2Cc4ccc…
EAF RCSB PDB Q11174 426.5 Da LogP 4.32 TPSA 91.3 ✓ Ro5 ✓ Clean CCOc1ccc(cc1)[C@@H]2c3c(n[nH]c3C(=O)N2Cc4cccnc4…
MXE RCSB PDB F8WSX2 76.1 Da LogP -0.37 TPSA 29.5 ✓ Ro5 ✓ Clean COCCO

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.

Structure

Chemistry

ChEMBL CHEMBL4643001 ChEMBL CHEMBL4635305 ChEMBL CHEMBL4756869 ChEMBL CHEMBL4634943 ChEMBL CHEMBL4637417 ChEMBL CHEMBL4077644 ChEMBL CHEMBL4794014 ChEMBL CHEMBL4646309 ChEMBL QGB ChEMBL 95Q ChEMBL CHEMBL4632547 ChEMBL CHEMBL4646247 ChEMBL CHEMBL4649081 ChEMBL CHEMBL4789376 ChEMBL CHEMBL4648962 ChEMBL CHEMBL4764430 ChEMBL CHEMBL4638897 ChEMBL 95K ChEMBL CHEMBL4082060 ChEMBL CHEMBL4755139 ChEMBL CHEMBL4642053 ChEMBL CHEMBL4644319 ChEMBL CHEMBL4076989 ChEMBL CHEMBL4637250 ChEMBL CHEMBL4541831 ChEMBL CHEMBL4209639 ChEMBL CHEMBL4749391 ChEMBL CHEMBL4453964 ChEMBL CHEMBL4546929 ChEMBL CHEMBL4202739 ChEMBL CHEMBL4206372 ChEMBL CHEMBL4214868 ChEMBL CHEMBL4648998 ChEMBL CHEMBL4549449 ChEMBL CHEMBL4457342 ChEMBL CHEMBL4446970 ChEMBL CHEMBL4214737 ChEMBL CHEMBL4214400 ChEMBL CHEMBL4647895 ChEMBL CHEMBL4217181 ChEMBL CHEMBL4776610 ChEMBL CHEMBL4648162 ChEMBL CHEMBL4637576 ChEMBL CHEMBL5574339 ChEMBL CHEMBL4098997 ChEMBL CHEMBL4461925 ChEMBL CHEMBL4440077 ChEMBL CHEMBL4580568 ChEMBL CHEMBL4212940 ChEMBL CHEMBL4521547 ChEMBL CHEMBL4218948 ChEMBL CHEMBL4520755 ChEMBL CHEMBL5542422 ChEMBL CHEMBL4577776 ChEMBL CHEMBL5570010 ChEMBL CHEMBL4214715 ChEMBL CHEMBL4075848 ChEMBL CHEMBL4211874 ChEMBL CHEMBL4442416 ChEMBL CHEMBL4464943 ChEMBL CHEMBL4547227 ChEMBL CHEMBL5573117 ChEMBL CHEMBL4640857 ChEMBL CHEMBL4218821 ChEMBL CHEMBL4472377 ChEMBL CHEMBL4207091 ChEMBL CHEMBL4210195 ChEMBL CHEMBL4072036 ChEMBL CHEMBL4204495 ChEMBL CHEMBL4460797 ChEMBL 3RM ChEMBL CHEMBL4644320 ChEMBL CHEMBL4470253 ChEMBL CX9 ChEMBL CHEMBL5562544 ChEMBL CHEMBL4648844 ChEMBL CHEMBL5592069 ChEMBL 95N ChEMBL CHEMBL4537828 ChEMBL CHEMBL5199149 ChEMBL CHEMBL4209364 ChEMBL CHEMBL4466293 ChEMBL CHEMBL4555101 ChEMBL CHEMBL4588384 ChEMBL CHEMBL5569707 ChEMBL CHEMBL4211133 ChEMBL CHEMBL4204446 ChEMBL CHEMBL4442663 ChEMBL CHEMBL4791640 ChEMBL CHEMBL5748148 ChEMBL CHEMBL5796211 ChEMBL CHEMBL5818712 ChEMBL CHEMBL5824953 ChEMBL CHEMBL5845571 ChEMBL CHEMBL5860434 ChEMBL CHEMBL5876350 ChEMBL CHEMBL6016578 ChEMBL CHEMBL6020081 ChEMBL CHEMBL6028752 ChEMBL CHEMBL6031220