KpKP13 Protein target profile

Endonuclease 8 bifunctional protein

Accession: KP13_03284

Gene: AHE45663.1 nei 3D evidence: AlphaFold DB model + ColabFold model UniProt A0A0H3GU47
Length 263
Pocket druggability (P2Rank · AlphaFold DB model) 0.074
Direct ligand evidence 0 57 total records
Functional annotation 2 EC 11 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 (%)
32.773 Lower values reduce human off-target concern.
Human E-value
3.75e-07
Gut microbiome similarity
1.7% 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
95.53 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) 0.074
Structure A0A0H3GU47
Pocket Pocket 1
Druggability (FPocket) 0.243
Structure A0A0H3GU47
Pocket Pocket 5
ColabFold model
P2Rank 0.077 · Pocket 1
FPocket 0.303 · Pocket 7
Core conservation Accessory gene
Roary core
CoreCruncher accessory
Gut microbiome 81 / 4744 genomes with a hit
Prevalence 1.7%

Sequence

Primary amino-acid sequence viewer.

MPEGPEIRRAADKLEAAIKGEPLTNVWFAFPQLQPYQTQLTGQRVTHIATRGKALLTHFSGGLTLYSHNQLYGVWRVVDAGVEPQSNRVLRVRLQTASKAILLYSASDIDILTAEQVANHPFLLRVGPDVLDMTLTAEQVKARLLSAKFRNRQFSGLLLDQAFLAGLGNYLRVEILWQVGLSGKRKAAELSDSQLDALAHALLDIPRLSYRTRGLVDDNKHHGALFRFKVFHRDGERCERCGGIIEKTTLSSRPFYWCPGCQH

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

2 EC 11 GO

Subcellular localization

Localization
Cytoplasmic

Enzyme Commission (EC)

2

Gene Ontology (GO)

11
  • GO:0008270 Binding to a zinc ion (Zn).
  • GO:0003684 Binding to damaged DNA.
  • GO:0003906 Catalysis of the cleavage of the C-O-P bond in the AP site created when DNA glycosylase removes a damaged base, involved in the DNA base excision repair pathway (BER).
  • GO:0003676 Binding to a nucleic acid.
  • GO:0140078 Catalysis of the cleavage of an AP site 3' of the baseless site by a beta-lyase mechanism, leaving an unsaturated aldehyde, termed a 3'-(4-hydroxy-5-phospho-2-pentenal) residue, and a 5'-phosphate.
  • GO:0000703 Catalysis of the removal oxidized pyrimidine bases by cleaving the N-C1' glycosidic bond between the oxidized pyrimidine and the deoxyribose sugar. The reaction involves formation of a covalent enzyme-pyrimidine base intermediate. Release of the enzyme and free base by a beta-elimination or a beta, gamma-elimination mechanism results in the cleavage of the DNA backbone 3' of the apyrimidinic (AP) site.
  • GO:0016799 Catalysis of the hydrolysis of any N-glycosyl bond.
  • GO:0006284 In base excision repair, an altered base is removed by a DNA glycosylase enzyme, followed by excision of the resulting sugar phosphate. The small gap left in the DNA helix is filled in by the sequential action of DNA polymerase and DNA ligase.
  • GO:0019104 Catalysis of the removal of damaged bases by cleaving the N-C1' glycosidic bond between the target damaged DNA base and the deoxyribose sugar. The reaction releases a free base and leaves an apurinic/apyrimidinic (AP) site.
  • GO:0006281 The process of restoring DNA after damage. Genomes are subject to damage by chemical and physical agents in the environment (e.g. UV and ionizing radiations, chemical mutagens, fungal and bacterial toxins, etc.) and by free radicals or alkylating agents endogenously generated in metabolism. DNA is also damaged because of errors during its replication. A variety of different DNA repair pathways have been reported that include direct reversal, base excision repair, nucleotide excision repair, photoreactivation, bypass, double-strand break repair pathway, and mismatch repair pathway.
  • GO:0003677 Any molecular function by which a gene product interacts selectively and non-covalently with DNA (deoxyribonucleic acid).

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

31 records
Show feature table
Start End DB Term Name
2 116 CDD cd08965 EcNei-like_N
2 116 InterPro IPR044091 Nei, N-terminal
2 110 SMART SM00898 Fapy_DNA_glyco_2
2 110 InterPro IPR012319 Formamidopyrimidine-DNA glycosylase, catalytic domain
126 214 SUPERFAMILY SSF46946 S13-like H2TH domain
126 214 InterPro IPR010979 Ribosomal protein S13-like, H2TH
226 262 SUPERFAMILY SSF57716 Glucocorticoid receptor-like (DNA-binding domain)
128 263 Gene3D G3DSA:1.10.8.50 -
2 104 ProSiteProfiles PS51068 Formamidopyrimidine-DNA glycosylase catalytic domain profile.
2 104 InterPro IPR012319 Formamidopyrimidine-DNA glycosylase, catalytic domain
127 263 FunFam G3DSA:1.10.8.50:FF:000005 Endonuclease 8
238 262 ProSitePatterns PS01242 Zinc finger FPG-type signature.
238 262 InterPro IPR015887 DNA glycosylase/AP lyase, zinc finger domain, DNA-binding site
126 221 SMART SM01232 H2TH_2
126 221 InterPro IPR015886 DNA glycosylase/AP lyase, H2TH DNA-binding
1 262 PANTHER PTHR42697 ENDONUCLEASE 8
235 263 Pfam PF06827 Zinc finger found in FPG and IleRS
235 263 InterPro IPR010663 Zinc finger, FPG/IleRS-type
2 127 Gene3D G3DSA:3.20.190.10 -
2 127 InterPro IPR035937 MutM-like, N-terminal
2 127 FunFam G3DSA:3.20.190.10:FF:000002 Endonuclease 8
2 125 SUPERFAMILY SSF81624 N-terminal domain of MutM-like DNA repair proteins
2 125 InterPro IPR035937 MutM-like, N-terminal
1 263 Hamap MF_01253 Endonuclease 8 [nei].
1 263 InterPro IPR023713 Endonuclease VIII
127 205 Pfam PF06831 Formamidopyrimidine-DNA glycosylase H2TH domain
127 205 InterPro IPR015886 DNA glycosylase/AP lyase, H2TH DNA-binding
1 103 Pfam PF01149 Formamidopyrimidine-DNA glycosylase N-terminal domain
1 103 InterPro IPR012319 Formamidopyrimidine-DNA glycosylase, catalytic domain
229 263 ProSiteProfiles PS51066 Zinc finger FPG-type profile.
229 263 InterPro IPR000214 Zinc finger, DNA glycosylase/AP lyase-type

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
0.074
Likely same site as FPocket 5 1.8 Å 9 shared residues 100% of smaller site
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Surrounding area
Pocket 2 P2Rank #2
0.046
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Surrounding area
Pocket 3 P2Rank #3
0.025
Show in viewer
Surrounding area
Pocket 4 P2Rank #4
0.015
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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 #5
0.243
Likely same site as P2Rank 1 1.8 Å 9 shared residues 100% of smaller site
Show in viewer
Surrounding area
Residue sets
UniProt: Active site:2-2 Schiff-base intermediate with DNA
UniProt: Active site:253-253 Proton donor; for delta-elimination activity
UniProt: Active site:3-3 Proton donor
UniProt: Active site:53-53 Proton donor; for beta-elimination activity
UniProt: Binding site:125-125
UniProt: Binding site:169-169
UniProt: Binding site:70-70
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_A0A0H3GU47
AlphaFold DB full sequence Viewing
ColabFold KP13_03284
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.

57 records
Chemistry signal

Structural ligand evidence is available for this target.

Direct evidence 0 same-protein records
Transferred evidence 7 records from similar proteins
Structural ligands 7 0 loaded crystals
Measured bioactivity 0 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
2ON PDB via homolog 168.2 Da · LogP -0.07 · TPSA 74.4 Open detail RCSB PDB
5JL PDB via homolog Detail RCSB PDB
KB5 PDB via homolog Detail RCSB PDB
KBN PDB via homolog Detail RCSB PDB
KBQ 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
2ON RCSB PDB P42371 168.2 Da LogP -0.07 TPSA 74.4 ✓ Ro5 ✓ Clean c1[nH]c2c(n1)C(=O)NC(=N2)S
5JL RCSB PDB P42371 200.2 Da LogP 0.97 TPSA 80.2 ✓ Ro5 ✓ Clean C12=C(NC(=S)N1)NC(=S)NC2=O
KB5 RCSB PDB P42371 167.2 Da LogP 0.22 TPSA 80.5 ✓ Ro5 ✓ Clean c1nc(c2c(n1)[nH]c(n2)S)N
KBN RCSB PDB P42371 220.2 Da LogP 1.66 TPSA 54.5 ✓ Ro5 ✓ Clean c1[nH]c2c(n1)c(nc(n2)C(F)(F)F)S
KBQ RCSB PDB P42371 167.2 Da LogP 0.91 TPSA 64.4 ✓ Ro5 ✓ Clean c1c[nH]c2c1C(=O)NC(=S)N2
KD8 RCSB PDB P42371 208.2 Da LogP 0.99 TPSA 74.4 ✓ Ro5 ✓ Clean Cc1c(nc2c(n1)C(=O)NC(=S)N2)C
PED RCSB PDB P50465 200.1 Da LogP -0.77 TPSA 107.2 ✓ Ro5 ✓ Clean CC[C@@H]([C@@H](COP(=O)(O)O)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.

Cross-references

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