KpKP13 Protein target profile

DNA polymerase IV

Accession: KP13_32224

Gene: dinB AHE46193.1 3D evidence: AlphaFold DB model + ColabFold model UniProt A0A0H3GN39
Length 370
Pocket druggability (P2Rank · AlphaFold DB model) 0.557
Direct ligand evidence 0 85 total records
Functional annotation 1 EC 8 GO
Target summary

Promising target candidate with multiple supporting evidence streams.

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 (%)
55.814 Lower values reduce human off-target concern.
Human E-value
1.34e-10
Gut microbiome similarity
3.2% 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
92.65 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) 0.557
Structure A0A0H3GN39
Pocket Pocket 1
Druggability (FPocket) 0.791
Structure A0A0H3GN39
Pocket Pocket 2
ColabFold model
P2Rank 0.581 · Pocket 1
FPocket 0.776 · Pocket 1
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 153 / 4744 genomes with a hit
Prevalence 3.2%

Sequence

Primary amino-acid sequence viewer.

MKFASVFAMLYGYTVLSLTMRKIIHVDMDCFFAAVEMRDNPALRDIPLAIGGSRVQRGVISTANYPARKFGVRSAMPTATALKLCPHLTLLPGRFDAYKEASNHIREIFSRYTSRIEPLSLDEAYLDVSDSEHCHGSATLIAQEIRQTIERELRLTASAGVAPVKFLAKIASDMNKPNGQFVIAPHQVAEFVRALPLAKIPGVGKVSAAKLENMGLRTCGDVQNSDLAMLLKRFGKFGRILWERSHGIDEREIHNDRQRKSVGVERTLAEDIHEWPECEAIIENLYPELERRLAKVKPDLLIARQGIKLKFNDFQLTTQEHVWPRLNKEDLIATAHKAWDERRGGRGVRLVGLHVTLLDPQLERQLLLGI

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

1 EC 8 GO

Subcellular localization

Localization
Cytoplasmic

Enzyme Commission (EC)

1

Gene Ontology (GO)

8
  • 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:0003684 Binding to damaged DNA.
  • 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:0005829 The part of the cytoplasm that does not contain organelles but which does contain other particulate matter, such as protein complexes.
  • GO:0000287 Binding to a magnesium (Mg) ion.
  • GO:0006261 A DNA replication process that uses parental DNA as a template for the DNA-dependent DNA polymerases that synthesize the new strands.
  • GO:0042276 The conversion of DNA-damage induced single-stranded gaps into large molecular weight DNA after replication by using a specialized DNA polymerase or replication complex to insert a defined nucleotide across the lesion. This process does not remove the replication-blocking lesions and causes an increase in the endogenous mutation level. For example, in E. coli, a low fidelity DNA polymerase, pol V, copies lesions that block replication fork progress. This produces mutations specifically targeted to DNA template damage sites, but it can also produce mutations at undamaged sites.
  • 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.

32 records
Show feature table
Start End DB Term Name
40 92 FunFam G3DSA:3.40.1170.60:FF:000001 DNA polymerase IV
23 204 ProSiteProfiles PS50173 UmuC domain profile.
23 204 InterPro IPR001126 UmuC domain
26 173 Pfam PF00817 impB/mucB/samB family
26 173 InterPro IPR001126 UmuC domain
11 17 Phobius SIGNAL_PEPTIDE_C_REGION C-terminal region of a signal peptide.
259 366 Pfam PF11799 impB/mucB/samB family C-terminal domain
259 366 InterPro IPR017961 DNA polymerase, Y-family, little finger domain
1 2 Phobius SIGNAL_PEPTIDE_N_REGION N-terminal region of a signal peptide.
3 10 Phobius SIGNAL_PEPTIDE_H_REGION Hydrophobic region of a signal peptide.
18 370 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
40 92 Gene3D G3DSA:3.40.1170.60 -
20 360 PANTHER PTHR11076 DNA REPAIR POLYMERASE UMUC / TRANSFERASE FAMILY MEMBER
87 184 FunFam G3DSA:3.30.70.270:FF:000002 DNA polymerase IV
188 216 Pfam PF11798 IMS family HHH motif
188 216 InterPro IPR024728 DNA polymerase type-Y, HhH motif
20 368 Hamap MF_01113 DNA polymerase IV [dinB].
20 368 InterPro IPR022880 DNA polymerase IV
260 370 Gene3D G3DSA:3.30.1490.100 -
260 370 InterPro IPR036775 DNA polymerase, Y-family, little finger domain superfamily
24 358 CDD cd03586 PolY_Pol_IV_kappa
24 358 InterPro IPR022880 DNA polymerase IV
260 370 FunFam G3DSA:3.30.1490.100:FF:000002 DNA polymerase IV
23 184 Gene3D G3DSA:3.30.70.270 -
23 184 InterPro IPR043128 Reverse transcriptase/Diguanylate cyclase domain
1 17 Phobius SIGNAL_PEPTIDE Signal peptide region
186 247 FunFam G3DSA:1.10.150.20:FF:000019 DNA polymerase IV
260 368 SUPERFAMILY SSF100879 Lesion bypass DNA polymerase (Y-family), little finger domain
260 368 InterPro IPR036775 DNA polymerase, Y-family, little finger domain superfamily
19 253 SUPERFAMILY SSF56672 DNA/RNA polymerases
19 253 InterPro IPR043502 DNA/RNA polymerase superfamily
185 246 Gene3D G3DSA:1.10.150.20 -

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
0.557
Show in viewer
Surrounding area
Pocket 2 P2Rank #2
0.133
Show in viewer
Surrounding area
Pocket 3 P2Rank #3
0.029
Show in viewer
Surrounding area

Binding pockets · FPocket

Druggability (FPocket): high ≥ 0.7 · medium 0.4–0.69 · low < 0.4

Pocket 1 FPocket #2
0.791
Show in viewer
Surrounding area
Residue sets
UniProt: Active site:104-104
UniProt: Binding site:103-103
UniProt: Binding site:8-8
UniProt: Site:13-13 Substrate discrimination
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_A0A0H3GN39
AlphaFold DB full sequence Viewing
ColabFold KP13_32224
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.

85 records
Chemistry signal

Structural and bioactivity evidence are both available for this target.

Direct evidence 0 same-protein records
Transferred evidence 35 records from similar proteins
Structural ligands 32 0 loaded crystals
Measured bioactivity 3 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
0G4 PDB via homolog 486.2 Da · LogP -0.53 · TPSA 232.8 Open detail RCSB PDB
0G8 PDB via homolog Detail RCSB PDB
0KX PDB via homolog Detail RCSB PDB
0OH PDB via homolog Detail RCSB PDB
0OJ 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
0G4 RCSB PDB Q97W02 486.2 Da LogP -0.53 TPSA 232.8 2 viol. ✓ Clean C1[C@H](O[C@H](S1)COP(=O)(O)OP(=O)(NP(=O)(O)O)O…
0G8 RCSB PDB Q97W02 389.2 Da LogP -0.36 TPSA 183.4 ✓ Ro5 ✓ Clean C1[C@H](O[C@H](S1)COP(=O)(O)OP(=O)(O)O)N2C=CC(=…
0KX RCSB PDB Q47155 466.2 Da LogP -1.61 TPSA 253.0 2 viol. ✓ Clean C1[C@@H]([C@H](O[C@H]1N2C=CC(=NC2=O)N)COP(=O)(N…
0OH RCSB PDB Q9UNA4 501.2 Da LogP 0.06 TPSA 249.7 3 viol. ✓ Clean c1nc(c2c(n1)n(cn2)[C@H]3C[C@@H]([C@]4([C@@H]3C4…
0OJ RCSB PDB Q9UNA4 501.2 Da LogP -0.15 TPSA 249.7 3 viol. ✓ Clean c1nc(c2c(n1)n(cn2)[C@]34C[C@H]3[C@@H]([C@H](C4)…
1FZ RCSB PDB Q47155 481.2 Da LogP -1.59 TPSA 246.9 1 viol. ✓ Clean CC1=CN(C(=O)NC1=O)[C@H]2C[C@@H]([C@H](O2)COP(=O…
2LF RCSB PDB Q97W02 345.2 Da LogP -1.49 TPSA 185.8 ✓ Ro5 ✓ Clean C1[C@@H]([C@H]2[C@H](c3nc4c(n3[C@@H]1O2)N=C(NC4…
2TM RCSB PDB Q47155 481.2 Da LogP -2.10 TPSA 261.2 2 viol. ✓ Clean C1=CN(C(=O)N=C1N)[C@H]2[C@@H]([C@@H]([C@H](O2)C…
3TT RCSB PDB Q97W02 468.2 Da LogP -0.67 TPSA 232.8 2 viol. ✓ Clean C1[C@H](O[C@H](S1)COP(=O)(O)OP(=O)(NP(=O)(O)O)O…
8GT RCSB PDB Q47155 539.2 Da LogP -3.04 TPSA 319.1 3 viol. ✓ Clean C([C@@H]1[C@H]([C@H]([C@@H](O1)N2C3=C(C(=O)NC(=…
A38 RCSB PDB Q97W02 347.2 Da LogP -1.54 TPSA 185.8 ✓ Ro5 ✓ Clean c1nc(c2c(n1)N(C(=O)N2)[C@H]3C[C@@H]([C@H](O3)CO…
ADI RCSB PDB Q9UNA4 395.2 Da LogP 0.31 TPSA 192.1 ✓ Ro5 ✓ Clean c1nc(c2c(n1)n(cn2)[C@H]3CC[C@H](O3)CO[P@@](=O)(…
AF RCSB PDB Q97W02 181.2 Da LogP 2.84 TPSA 26.0 ✓ Ro5 ✓ Clean c1ccc-2c(c1)Cc3c2ccc(c3)N
BAP RCSB PDB Q97W02 304.3 Da LogP 2.90 TPSA 60.7 ✓ Ro5 ✓ Clean c1cc2ccc3cc4c(c5c3c2c(c1)cc5)C[C@H]([C@H]([C@@H…
DCP RCSB PDB Q9UBZ9 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@@](=…
DCT RCSB PDB Q97W02 451.2 Da LogP -0.15 TPSA 230.0 1 viol. ✓ Clean C1C[C@@H](O[C@@H]1CO[P@](=O)(O)O[P@](=O)(O)OP(=…
DDS RCSB PDB Q97W02 475.2 Da LogP 0.43 TPSA 238.7 1 viol. ✓ Clean c1nc(c2c(n1)n(cn2)[C@H]3CC[C@H](O3)CO[P@@](=O)(…
DDY RCSB PDB Q97W02 371.2 Da LogP -0.27 TPSA 183.4 ✓ Ro5 ✓ Clean C1C[C@@H](O[C@@H]1CO[P@@](=O)(O)OP(=O)(O)O)N2C=…
DG3 RCSB PDB Q97W02 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 Q97W02 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…
DOC RCSB PDB Q97W02 291.2 Da LogP -0.39 TPSA 136.9 ✓ Ro5 ✓ Clean C1C[C@@H](O[C@@H]1COP(=O)(O)O)N2C=CC(=NC2=O)N
DPO RCSB PDB Q47155 173.9 Da LogP -3.34 TPSA 135.6 ✓ Ro5 ✓ Clean [O-]P(=O)([O-])OP(=O)([O-])[O-]
DT RCSB PDB Q97W02 322.2 Da LogP -1.40 TPSA 151.1 ✓ Ro5 ✓ Clean CC1=CN(C(=O)NC1=O)[C@H]2C[C@@H]([C@H](O2)COP(=O…
DTP RCSB PDB Q97W02 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 Q97W02 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@@…
FTD RCSB PDB Q97W02 409.2 Da LogP -0.25 TPSA 180.9 ✓ Ro5 ✓ Clean C1[C@H](O[C@H](S1)COP(=O)(O)OP(=O)(O)O)N2CC(=C(…
LTP RCSB PDB Q97W02 387.2 Da LogP -1.30 TPSA 203.7 ✓ Ro5 ✓ Clean C1[C@H]([C@@H](O[C@@H]1N2C=CC(=NC2=O)N)COP(=O)(…
POP RCSB PDB Q97W02 176.0 Da LogP -2.08 TPSA 129.9 ✓ Ro5 ✓ Clean O[P@@](=O)([O-])O[P@@](=O)(O)[O-]
TTP RCSB PDB Q97W02 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@]…
TTW RCSB PDB Q47155 481.2 Da LogP -1.59 TPSA 246.9 1 viol. ✓ Clean CC1=CN(C(=O)NC1=O)[C@H]2C[C@@H]([C@H](O2)COP(=O…
XG4 RCSB PDB Q97W02 506.2 Da LogP -1.73 TPSA 281.7 3 viol. ✓ Clean c1nc2c(n1[C@H]3C[C@@H]([C@H](O3)CO[P@@](=O)(N[P…
YYY RCSB PDB Q97W02 387.2 Da LogP -1.30 TPSA 203.7 ✓ Ro5 ✓ Clean C1[C@@H]([C@H](O[C@H]1N2C=CC(=NC2=O)N)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.