KpKP13 Protein target profile

DNA polymerase III subunit alpha

Accession: KP13_01795

Gene: AHE46235.1 dnaE 3D evidence: AlphaFold DB model + ColabFold model UniProt A0A0H3GS50
Length 1160
Pocket druggability (P2Rank · AlphaFold DB model) 0.778
Direct ligand evidence 0 52 total records
Functional annotation 1 EC 6 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
No hit
Gut microbiome similarity
3.4% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

Essential (DEG)
Y
DEG identity (%)
95.431 Higher values support similarity to known essential genes.
DEG E-value
0.0 Smaller values mean stronger essential-gene similarity.

Structure confidence

ColabFold pLDDT
90.56 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) 0.778
Structure A0A0H3GS50
Pocket Pocket 1
Druggability (FPocket) 0.598
Structure A0A0H3GS50
Pocket Pocket 64
ColabFold model
P2Rank 0.894 · Pocket 1
FPocket 0.437 · Pocket 78
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 159 / 4744 genomes with a hit
Prevalence 3.4%

Sequence

Primary amino-acid sequence viewer.

MAEPRFVHLRVHSDYSMIDGLAKTGPLVKKAASLGMPALAITDFTNLCGLVKFYGTGHGAGIKPIVGADFHVQCDLLGDEFTELTVLAANNTGYQNLTLLISRAYQRGYGALGPWIDRDWLVEHQEGLILLSGGRKGDVGVSLIRGNMPLVEQCVAFYEEHFPDRYFLELIRTGRQDEEAYLHAAVALAEARGLPVVATNDVRFLDTSDFDAHEIRVAIHDGFTLDDPKRPRNYSPQQYMRSEEEMCELFADIPEALANSVEIAKRCNVTVRLGEYFLPQFPTGDMTTEDFLVMKSKEGLEERLEFLFPDPAVRAEKRPEYDQRLDIELQVINQMGFPGYFLIVMEFIQWSKDNGVPVGPGRGSGAGSLVAYALKITDLDPLEFDLLFERFLNPERVSMPDFDVDFCMEKRDQVIEHVADMYGRDAVSQIITFGTMAAKAVIRDVGRVLGHPYGFVDRISKLVPPDPGMTLAKAFEAEPQLPEIYEADEEVKALIDMARKLEGVTRNAGKHAGGVVIAPTKITDFAPLYCDEQGLHPVTQFDKNDVEYAGLVKFDFLGLRTLTIINWALEMINKRREKNGEGPLDIAAIPLDDKKSFDMLQRSETTAVFQLESRGMKDLIKRLQPDCFEDMIALVALFRPGPLQSGMVDNFIDRKHGREEISYPDVQWQHESLKPVLEPTYGIILYQEQVMQIAQVLSGYTLGGADMLRRAMGKKKPEEMAKQRSIFEDGAKKNGIDGELAMKIFDLVEKFAGYGFNKSHSAAYALVSYQTLWLKAHYPAEFMAAVMTADMDNTEKVVGLVDECWRMGLKILPPDINSGLYHFHVNDDGEIVYGIGAIKGVGEGPIEAIIEARNNGGYFRELFDLCARTDIKKLNRRVLEKLIMSGAFDRLGPHRAALMNSLGDALKAADQHAKAEAIGQADMFGVLAEEPEQIEQSYASCQPWPEQVVLDGERETLGLYLTGHPINQYLKEIERYVGGVRLKDMHPTERGKVTTAAGLVIAARVMVTKRGNRIGICTLDDRSGRLEVMLFTDALDKYQQLLEKDRILIVSGQVSFDDFSGGLKMTAREVMDIDEAREKYARGLAISLTDRQIDDQLLNRLRQSLEPHRSGTIPVHLYYQRADARARLRFGATWRVSPSDRLLNDLRGLIGSEQVELEFD

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

1 EC 6 GO

Subcellular localization

Localization
Cytoplasmic

Enzyme Commission (EC)

1

Gene Ontology (GO)

6
  • GO:0003676 Binding to a nucleic acid.
  • GO:0006260 The cellular metabolic process in which a cell duplicates one or more molecules of DNA. DNA replication begins when specific sequences, known as origins of replication, are recognized and bound by the origin recognition complex, and ends when the original DNA molecule has been completely duplicated and the copies topologically separated. The unit of replication usually corresponds to the genome of the cell, an organelle, or a virus. The template for replication can either be an existing DNA molecule or RNA.
  • GO:0003824 Catalysis of a biochemical reaction at physiological temperatures. In biologically catalyzed reactions, the reactants are known as substrates, and the catalysts are naturally occurring macromolecular substances known as enzymes. Enzymes possess specific binding sites for substrates, and are usually composed wholly or largely of protein, but RNA that has catalytic activity (ribozyme) is often also regarded as enzymatic.
  • GO:0008408 Catalysis of the hydrolysis of ester linkages within nucleic acids by removing nucleotide residues from the 3' end.
  • GO:0005737 The contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
  • 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.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

30 records
Show feature table
Start End DB Term Name
980 1074 Gene3D G3DSA:2.40.50.140 -
980 1074 InterPro IPR012340 Nucleic acid-binding, OB-fold
713 886 Gene3D G3DSA:1.10.150.870 -
433 510 FunFam G3DSA:1.10.10.1600:FF:000001 DNA polymerase III subunit alpha
1 270 Gene3D G3DSA:3.20.20.140 -
5 281 CDD cd07433 PHP_PolIIIA_DnaE1
713 886 FunFam G3DSA:1.10.150.870:FF:000001 DNA polymerase III subunit alpha
6 263 SUPERFAMILY SSF89550 PHP domain-like
6 263 InterPro IPR016195 Polymerase/histidinol phosphatase-like
980 1073 FunFam G3DSA:2.40.50.140:FF:000106 DNA polymerase III subunit alpha
1 270 FunFam G3DSA:3.20.20.140:FF:000028 DNA polymerase III subunit alpha
8 170 Pfam PF02811 PHP domain
8 170 InterPro IPR004013 PHP domain
433 510 Gene3D G3DSA:1.10.10.1600 Bacterial DNA polymerase III alpha subunit, thumb domain
433 510 InterPro IPR041931 Bacterial DNA polymerase III alpha subunit, thumb domain
995 1080 CDD cd04485 DnaE_OBF
808 897 Pfam PF14579 Helix-hairpin-helix motif
808 897 InterPro IPR029460 DNA polymerase, helix-hairpin-helix motif
6 1031 NCBIfam TIGR00594 DNA polymerase III subunit alpha
6 1031 InterPro IPR004805 Error-prone DNA polymerase/DNA polymerase III subunit alpha DnaE/PolC
7 74 SMART SM00481 npolultra
7 74 InterPro IPR003141 Polymerase/histidinol phosphatase, N-terminal
1000 1072 Pfam PF01336 OB-fold nucleic acid binding domain
1000 1072 InterPro IPR004365 OB-fold nucleic acid binding domain, AA-tRNA synthetase-type
292 558 Pfam PF07733 Bacterial DNA polymerase III alpha NTPase domain
292 558 InterPro IPR011708 Bacterial DNA polymerase III, alpha subunit, NTPase domain
561 735 Pfam PF17657 Bacterial DNA polymerase III alpha subunit finger domain
561 735 InterPro IPR040982 DNA polymerase III alpha subunit finger domain
6 1156 PANTHER PTHR32294 DNA POLYMERASE III SUBUNIT ALPHA
6 1156 InterPro IPR004805 Error-prone DNA polymerase/DNA polymerase III subunit alpha DnaE/PolC

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
0.778
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Surrounding area
Pocket 2 P2Rank #2
0.68
Likely same site as FPocket 38 2.4 Å 17 shared residues 100% of smaller site
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Surrounding area
Pocket 3 P2Rank #3
0.338
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Surrounding area
Pocket 4 P2Rank #4
0.181
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Surrounding area
Pocket 5 P2Rank #5
0.151
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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 #64
0.598
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Surrounding area
Pocket 2 FPocket #38
0.207 Unusual size
Likely same site as P2Rank 2 2.4 Å 17 shared residues 100% 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_A0A0H3GS50
AlphaFold DB full sequence Viewing
ColabFold KP13_01795
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.

52 records
Chemistry signal

Structural ligand evidence is available for this target.

Direct evidence 0 same-protein records
Transferred evidence 2 records from similar proteins
Structural ligands 2 0 loaded crystals
Measured bioactivity 0 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
3PO PDB via homolog 258.0 Da · LogP -0.69 · TPSA 170.8 Open detail RCSB PDB
DTP PDB via homolog Detail RCSB PDB
ZINC13434879 ZINC proposed compound · Tanimoto 1.000 Detail ZINC
ZINC13434881 ZINC proposed compound · Tanimoto 1.000 Detail ZINC
ZINC13434883 ZINC proposed compound · Tanimoto 1.000 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
3PO RCSB PDB Q9XDH5 258.0 Da LogP -0.69 TPSA 170.8 ✓ Ro5 ✓ Clean OP(=O)(O)OP(=O)(O)OP(=O)(O)O
DTP RCSB PDB Q9XDH5 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@]…

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.