KpKP13 Protein target profile

DNA primase

Accession: KP13_02824

Gene: AHE42606.1 dnaG 3D evidence: AlphaFold DB model + ColabFold model UniProt A0A0H3GVT7
Length 581
Pocket druggability (P2Rank · AlphaFold DB model) 0.455
Direct ligand evidence 0 54 total records
Functional annotation 1 EC 10 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
3.3% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

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

Structure confidence

ColabFold pLDDT
88.14 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) 0.455
Structure A0A0H3GVT7
Pocket Pocket 1
Druggability (FPocket) 0.468
Structure A0A0H3GVT7
Pocket Pocket 15
ColabFold model
P2Rank 0.459 · Pocket 1
FPocket 0.315 · Pocket 20
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 155 / 4744 genomes with a hit
Prevalence 3.3%

Sequence

Primary amino-acid sequence viewer.

MAGRIPRVFISDLLARTDIVDLIDARVKLKKQGKNFHACCPFHNEKTPSFTVNGEKQFYHCFGCGAHGNAIDFLMNYDKLEFVETVEELAAMHNLEVPYEAGNGPSQIERHQRQNLYQLLDGLNAFYQQSLMQPAADPARQYLAKRGLSSEVITRFAIGYAPPGWDNVLKRFGGNQENRQSLIDAGMLVTNDQGRSYDRFRERVMFPIRDKRGRVIGFGGRVLGDALPKYLNSPETDIFHKGRQLYGLYEAQQDNPKPPRLLVVEGYMDVVALAQYDINYAVASLGTSTTADHIQLLFRVTNNVICCYDGDRAGRDAAWRALETALPYMTDGRQLRFMFLPDGEDPDTLVRKEGKAAFEARMEQAQPLSTFLFNSLLPQVDLSTPDGRAQLSTLALPLITQVPGETLRIYLRQELGNKLGILDDAQLERLMPKQAENGAPRPAPQLKRTTMRILIGLLVQNPDLAPLVPPLEGLDSRKMPGLSLFSELVKSCLAQPGLTTGQLLEQYRGTKEAATLEKLSMWDDIADKDIAEQTFTDSLNHMFDSLLELRQEELIARDRTHGLSSEERRELWTISQELAKK

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

1 EC 10 GO

Subcellular localization

Localization
Cytoplasmic

Enzyme Commission (EC)

1

Gene Ontology (GO)

10
  • GO:0003896 OBSOLETE. Catalysis of the synthesis of a short RNA primer on a DNA template, providing a free 3'-OH that can be extended by DNA-directed DNA polymerases. In certain conditions, for example in response to DNA damage, some primases synthesize a DNA primer.
  • GO:0008270 Binding to a zinc ion (Zn).
  • 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:0016779 Catalysis of the transfer of a nucleotidyl group from one compound (donor) to another (acceptor).
  • GO:0006269 The synthesis of a short nucleotide polymer using one strand of unwound DNA as a template. The product is usually a RNA molecule between 4-15 nucleotides long that provides a free 3'-OH that can be extended by DNA-directed DNA polymerases. In certain conditions, for example in response to DNA damage, some primases synthesize a DNA primer.
  • GO:0003677 Any molecular function by which a gene product interacts selectively and non-covalently with DNA (deoxyribonucleic acid).
  • GO:0005737 The contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
  • GO:0000428 A protein complex that possesses DNA-directed RNA polymerase activity.
  • GO:1990077 Any of a family of protein complexes that form at the origin of replication or stalled replication forks and function in replication primer synthesis in all organisms. Early complexes initiate double-stranded DNA unwinding. The core unit consists of a replicative helicase and a primase. The helicase further unwinds the DNA and recruits the polymerase machinery. The primase synthesizes RNA primers that act as templates for complementary stand replication by the polymerase machinery. The primosome contains a number of associated proteins and protein complexes and contributes to the processes of replication initiation, lagging strand elongation, and replication restart.
  • GO:0003899 Catalysis of the reaction: nucleoside triphosphate + RNA(n) = diphosphate + RNA(n+1). Utilizes a DNA template, i.e. the catalysis of DNA-template-directed extension of the 3'-end of an RNA strand by one nucleotide at a time. Can initiate a chain 'de novo'.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

41 records
Show feature table
Start End DB Term Name
241 367 FunFam G3DSA:3.40.1360.10:FF:000002 DNA primase
369 424 Pfam PF10410 DnaB-helicase binding domain of primase
369 424 InterPro IPR019475 DNA primase, DnaB-helicase binding domain
368 426 Gene3D G3DSA:1.20.50.20 DnaG, RNA polymerase domain, helical bundle
241 367 Gene3D G3DSA:3.40.1360.10 -
260 340 CDD cd03364 TOPRIM_DnaG_primases
260 340 InterPro IPR034151 Bacterial DnaG primase, TOPRIM domain
126 251 Pfam PF08275 DNA primase catalytic core, N-terminal domain
126 251 InterPro IPR013264 DNA primase, catalytic core, N-terminal
368 426 FunFam G3DSA:1.20.50.20:FF:000001 DNA primase
451 573 Pfam PF08278 DNA primase DnaG DnaB-binding
451 573 InterPro IPR013173 DNA primase DnaG, DnaB-binding domain
2 580 PIRSF PIRSF002811 DnaG
2 580 InterPro IPR030846 DNA primase DnaG, bacteria
115 240 Gene3D G3DSA:3.90.980.10 -
115 240 InterPro IPR037068 DNA primase, catalytic core, N-terminal domain superfamily
110 240 FunFam G3DSA:3.90.980.10:FF:000001 DNA primase
1 100 Gene3D G3DSA:3.90.580.10 -
1 100 InterPro IPR036977 DNA Primase, CHC2-type zinc finger
263 348 Pfam PF13155 Toprim-like
447 578 SUPERFAMILY SSF117023 DNA primase DnaG, C-terminal domain
4 100 SUPERFAMILY SSF57783 Zinc beta-ribbon
36 90 SMART SM00400 primzinc3
36 90 InterPro IPR002694 Zinc finger, CHC2-type
259 341 ProSiteProfiles PS50880 Toprim domain profile.
259 341 InterPro IPR006171 TOPRIM domain
116 428 SUPERFAMILY SSF56731 DNA primase core
259 330 SMART SM00493 toprim5
259 330 InterPro IPR006171 TOPRIM domain
450 575 SMART SM00766 dnag_dnab_bind_seq8d
450 575 InterPro IPR013173 DNA primase DnaG, DnaB-binding domain
1 101 FunFam G3DSA:3.90.580.10:FF:000001 DNA primase
1 569 PANTHER PTHR30313 DNA PRIMASE
7 100 Pfam PF01807 CHC2 zinc finger
7 100 InterPro IPR002694 Zinc finger, CHC2-type
4 576 Hamap MF_00974 DNA primase [dnaG].
4 576 InterPro IPR030846 DNA primase DnaG, bacteria
434 581 Gene3D G3DSA:1.10.860.10 DNAb Helicase; Chain A
434 581 InterPro IPR016136 DNA helicase DnaB, N-terminal/DNA primase DnaG, C-terminal
5 419 NCBIfam TIGR01391 DNA primase
5 419 InterPro IPR006295 DNA primase, DnaG

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
0.455
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Surrounding area
Pocket 2 P2Rank #2
0.124
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Surrounding area
Pocket 3 P2Rank #3
0.114
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Surrounding area
Pocket 4 P2Rank #4
0.109
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Surrounding area
Pocket 5 P2Rank #5
0.03
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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 #15
0.468
Show in viewer
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_A0A0H3GVT7
AlphaFold DB full sequence Viewing
ColabFold KP13_02824
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.

54 records
Chemistry signal

Structural ligand evidence is available for this target.

Direct evidence 0 same-protein records
Transferred evidence 4 records from similar proteins
Structural ligands 4 0 loaded crystals
Measured bioactivity 0 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
0O2 PDB via homolog 683.1 Da · LogP -2.10 · TPSA 392.2 Open detail RCSB PDB
BEN PDB via homolog Detail RCSB PDB
G4P PDB via homolog Detail RCSB PDB
Y1 PDB via homolog Detail RCSB PDB
ZINC104869865 ZINC proposed compound · Tanimoto 0.823 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
0O2 RCSB PDB O05338 683.1 Da LogP -2.10 TPSA 392.2 3 viol. ✓ Clean c1nc2c(n1[C@H]3[C@@H]([C@@H]([C@H](O3)COP(=O)(O…
BEN RCSB PDB O05338 120.2 Da LogP 0.97 TPSA 49.9 ✓ Ro5 ✓ Clean [H]/N=C(\c1ccccc1)/N
G4P RCSB PDB O05338 603.2 Da LogP -2.22 TPSA 345.6 3 viol. ✓ Clean c1nc2c(n1[C@H]3[C@@H]([C@@H]([C@H](O3)CO[P@](=O…
Y1 RCSB PDB P0ABS5 88.9 Da LogP -0.00 TPSA 0.0 ✓ Ro5 ✓ Clean [Y+2]

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.