KpKP13 Protein target profile

DNA polymerase II

Accession: KP13_01945

Gene: polB AHE46384.1 3D evidence: AlphaFold DB model + ColabFold model UniProt A0A0H3GI42
Length 785
Pocket druggability (P2Rank · AlphaFold DB model) 0.337
Direct ligand evidence 0 64 total records
Functional annotation 1 EC 7 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 (%)
27.636 Lower values reduce human off-target concern.
Human E-value
1.95e-08
Gut microbiome similarity
2.7% 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
93.5 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) 0.337
Structure A0A0H3GI42
Pocket Pocket 1
Druggability (FPocket) 0.325
Structure A0A0H3GI42
Pocket Pocket 60
ColabFold model
P2Rank 0.606 · Pocket 1
FPocket 0.651 · Pocket 48
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 130 / 4744 genomes with a hit
Prevalence 2.7%

Sequence

Primary amino-acid sequence viewer.

MTQPRAGFLLTRHWRDTPQGTELSFWLATDDGPLQVTLPPQESVAFIPEAQRAQAERLLQGEKGLRFAPLALKDFHRQPIVGLYCRAHRQLMRLEKMLRDSGVTVYEGDIRPPERYLMERFITAPVWVEGETRGSQLVNARMKPNPDYRPPLKWVSLDIETSRHGELYCIGLEGCGQRVVYMLGPEPETPPDVDFELVFIASRPLLLEKLNAWFAEHDPDVLIGWNVVQFDLRVLQKHAERYRIPLRLGRGNSELEWREHGFKNGVFFAQANGRLIIDGIDALKSAFWNFSSFSLEAVARELLGEGKAIDNPWDRMDEIDRRFHEDKPALAIYNLQDCELVTRIFHKTEIMPFLLERATVNGLPADRHGGSVAAFSHLYFPRMHRLGYVAPNLGDVPPQASPGGYVMDSRPGLYDSVLVLDYKSLYPSIIRTFLIDPVGLVEGLAQPDDQHSIEGFLGARFSRDKHCLPGIVSQIWHGRDEAKRQHNKPLSQALKIIMNAFYGVLGTSACRFFDPRLASSITMRGHAIMRQTKALIEAKGYDVIYGDTDSTFVWLKRPHSEAQAAEIGRELVSDVNAWWAQELSKSQLTSALELEYETHFCRFLMPTIRGADTGSKKRYAGMIQEGDAQRMVFKGLETVRTDWTPLAQQFQQELYLRIFRNQPYQDYVRETIARLMNGELDEQLVYRKRLRRPLAEYQRNVPPHVRAARLADEHNLKLGRAQQYQQRGTIKYVWTTSGPEPVDYQQSPLDYDHYLTKQLQPVAEGILPFVNDDFATIVTGQLGLF

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

1 EC 7 GO

Subcellular localization

Localization
Cytoplasmic

Enzyme Commission (EC)

1

Gene Ontology (GO)

7
  • GO:0003676 Binding to a nucleic acid.
  • GO:0003887 Catalysis of the reaction: deoxynucleoside triphosphate + DNA(n) = diphosphate + DNA(n+1); DNA-template-directed extension of the 3'-end of a DNA strand by one nucleotide at a time.
  • GO:0000166 Binding to a nucleotide, any compound consisting of a nucleoside that is esterified with (ortho)phosphate or an oligophosphate at any hydroxyl group on the ribose or deoxyribose.
  • GO:0003677 Any molecular function by which a gene product interacts selectively and non-covalently with DNA (deoxyribonucleic acid).
  • GO:0008296 Catalysis of the sequential cleavage of mononucleotides from a free 3' terminus of a DNA molecule.
  • GO:0045004 Correction of replication errors by DNA polymerase using a 3'-5' exonuclease activity.
  • GO:0009432 An error-prone process for repairing damaged microbial DNA.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

38 records
Show feature table
Start End DB Term Name
2 46 FunFam G3DSA:2.40.50.590:FF:000001 DNA polymerase
350 448 Gene3D G3DSA:3.90.1600.10 Palm domain of DNA polymerase
350 448 InterPro IPR023211 DNA polymerase, palm domain superfamily
449 640 Gene3D G3DSA:3.90.1600.10 Palm domain of DNA polymerase
449 640 InterPro IPR023211 DNA polymerase, palm domain superfamily
2 80 Gene3D G3DSA:2.40.50.590 -
91 152 Gene3D G3DSA:2.40.50.590 -
383 433 Pfam PF00136 DNA polymerase family B
383 433 InterPro IPR006134 DNA-directed DNA polymerase, family B, multifunctional domain
491 740 Pfam PF00136 DNA polymerase family B
491 740 InterPro IPR006134 DNA-directed DNA polymerase, family B, multifunctional domain
206 298 Pfam PF03104 DNA polymerase family B, exonuclease domain
206 298 InterPro IPR006133 DNA-directed DNA polymerase, family B, exonuclease domain
75 776 PANTHER PTHR10322 DNA POLYMERASE CATALYTIC SUBUNIT
543 551 PRINTS PR00106 DNA-directed DNA-polymerase family B signature
543 551 InterPro IPR006172 DNA-directed DNA polymerase, family B
491 503 PRINTS PR00106 DNA-directed DNA-polymerase family B signature
491 503 InterPro IPR006172 DNA-directed DNA polymerase, family B
417 430 PRINTS PR00106 DNA-directed DNA-polymerase family B signature
417 430 InterPro IPR006172 DNA-directed DNA polymerase, family B
545 553 ProSitePatterns PS00116 DNA polymerase family B signature.
545 553 InterPro IPR017964 DNA-directed DNA polymerase, family B, conserved site
150 346 CDD cd05784 DNA_polB_II_exo
350 448 FunFam G3DSA:3.90.1600.10:FF:000009 DNA polymerase
153 349 Gene3D G3DSA:3.30.420.10 -
153 349 InterPro IPR036397 Ribonuclease H superfamily
387 779 SUPERFAMILY SSF56672 DNA/RNA polymerases
387 779 InterPro IPR043502 DNA/RNA polymerase superfamily
399 771 CDD cd05537 POLBc_Pol_II
641 785 Gene3D G3DSA:1.10.132.60 -
641 785 InterPro IPR042087 DNA polymerase family B, thumb domain
641 785 FunFam G3DSA:1.10.132.60:FF:000008 DNA polymerase
150 557 SMART SM00486 polmehr3
150 557 InterPro IPR006172 DNA-directed DNA polymerase, family B
6 391 SUPERFAMILY SSF53098 Ribonuclease H-like
6 391 InterPro IPR012337 Ribonuclease H-like superfamily
451 640 FunFam G3DSA:3.90.1600.10:FF:000010 DNA polymerase
153 349 FunFam G3DSA:3.30.420.10:FF:000052 DNA polymerase

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
0.337
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Surrounding area
Pocket 2 P2Rank #2
0.324
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Surrounding area
Pocket 3 P2Rank #3
0.274
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Surrounding area
Pocket 4 P2Rank #4
0.229
Likely same site as FPocket 26 5.9 Å 13 shared residues 93% of smaller site
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Surrounding area
Pocket 5 P2Rank #5
0.202
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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 #60
0.325
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Surrounding area
Pocket 2 FPocket #28
0.28
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Surrounding area
Pocket 3 FPocket #26
0.232 Unusual size
Likely same site as P2Rank 4 5.9 Å 13 shared residues 93% of smaller site
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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_A0A0H3GI42
AlphaFold DB full sequence Viewing
ColabFold KP13_01945
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.

64 records
Chemistry signal

Structural ligand evidence is available for this target.

Direct evidence 0 same-protein records
Transferred evidence 14 records from similar proteins
Structural ligands 14 0 loaded crystals
Measured bioactivity 0 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
5CY PDB via homolog 471.7 Da · LogP 5.62 · TPSA 46.7 Open detail RCSB PDB
9O7 PDB via homolog Detail RCSB PDB
B0U PDB via homolog Detail RCSB PDB
B9X PDB via homolog Detail RCSB PDB
DCP 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
5CY RCSB PDB Q56366 471.7 Da LogP 5.62 TPSA 46.7 1 viol. ✓ Clean CC1(c2ccccc2[N+](=C1/C=C/C=C/C=C/3\C(c4ccccc4N3…
9O7 RCSB PDB D0VWU9 477.2 Da LogP -0.99 TPSA 258.9 2 viol. ✓ Clean c1nc(c2c(n1)n(cn2)[C@H]3[C@@H]([C@H](CO3)OP(=O)…
B0U RCSB PDB Q56366 221.3 Da LogP -0.53 TPSA 91.0 ✓ Ro5 ✓ Clean C(COCCOCCOCCN)C(=O)O
B9X RCSB PDB Q56366 475.4 Da LogP 0.16 TPSA 190.4 1 viol. ✓ Clean CCOCCOCCC(=O)O[C@H]1C[C@@H](O[C@@H]1COP(=O)(O)O…
DCP RCSB PDB P21189 467.2 Da LogP -1.18 TPSA 250.2 2 viol. ✓ Clean C1[C@@H]([C@H](O[C@H]1N2C=CC(=NC2=O)N)CO[P@@](=…
DG RCSB PDB P28340 347.2 Da LogP -1.54 TPSA 185.8 ✓ Ro5 ✓ Clean c1nc2c(n1[C@H]3C[C@@H]([C@H](O3)COP(=O)(O)O)O)N…
DG3 RCSB PDB P21189 491.2 Da LogP -0.28 TPSA 258.6 2 viol. ✓ Clean c1nc2c(n1[C@H]3CC[C@H](O3)CO[P@@](=O)(O)O[P@](=…
DGT RCSB PDB P21189 507.2 Da LogP -1.31 TPSA 278.9 3 viol. ✓ Clean c1nc2c(n1[C@H]3C[C@@H]([C@H](O3)CO[P@@](=O)(O)O…
DTP RCSB PDB Q56366 491.2 Da LogP -0.60 TPSA 258.9 2 viol. ✓ Clean c1nc(c2c(n1)n(cn2)[C@H]3C[C@@H]([C@H](O3)CO[P@]…
DZ4 RCSB PDB D0VWU9 490.2 Da LogP -1.03 TPSA 261.7 2 viol. ✓ Clean c1nc(c2c(n1)n(cn2)[C@H]3C[C@@H]([C@H](O3)CO[P@@…
FA2 RCSB PDB D0VWU9 317.2 Da LogP -1.22 TPSA 165.8 ✓ Ro5 ✓ Clean c1nc(c2c(n1)n(cn2)[C@H]3[C@@H]([C@H](CO3)OP(=O)…
PPV RCSB PDB Q56366 178.0 Da LogP -0.81 TPSA 124.3 ✓ Ro5 ✓ Clean OP(=O)(O)OP(=O)(O)O
TCE RCSB PDB D0VWU9 250.2 Da LogP 0.89 TPSA 111.9 ✓ Ro5 ✓ Clean C(CP(CCC(=O)O)CCC(=O)O)C(=O)O
TTP RCSB PDB P28340 482.2 Da LogP -1.16 TPSA 244.1 2 viol. ✓ Clean CC1=CN(C(=O)NC1=O)[C@H]2C[C@@H]([C@H](O2)CO[P@]…

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.