KpKP13 Protein target profile

RNA polymerase sigma factor RpoD

Accession: KP13_31791

Gene: AHE42605.1 rpoD 3D evidence: AlphaFold DB model + ColabFold model UniProt A0A0H3H395
Length 632
Pocket druggability (P2Rank · AlphaFold DB model) 0.095
Direct ligand evidence 0 63 total records
Functional annotation 0 EC 5 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
4.7% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

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

Structure confidence

ColabFold pLDDT
81.87 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) 0.095
Structure A0A0H3H395
Pocket Pocket 1
Druggability (FPocket) 0.769
Structure A0A0H3H395
Pocket Pocket 4
ColabFold model
P2Rank 0.139 · Pocket 1
FPocket 0.421 · Pocket 26
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 223 / 4744 genomes with a hit
Prevalence 4.7%

Sequence

Primary amino-acid sequence viewer.

MSTARLPTPIKRIKCGYRLMEQNPQSQLKLLVQRGKEQGYLTYAEVNDHLPEDIVDSDQIEDIIQMINDMGIQVMEEAPDADDLMLAENTADEDAAEAAAQVLSSVESEIGRTTDPVRMYMREMGTVELLTREGEIDIAKRIEDGINQVQCSVAEYPEAITYLLEQYDRVEAEEARLSDLITGFVDPNAEEDMAPTATHVGSELSQEEMDDDEDEDEDEDADDNSDDDNSIDPELAREKFAELRTQYELTRDTIKAKGRSHAAAQEEILKLSEVFKQFRLVPKQFDYLVNSMRSMMDRVRTQERIIMKLCVEQCKMPKKNFITLFTGNETSETWFNAAVAMNKPWSEKLLEVKEDVQRGLQKLQQIEEETGLTIEQVKDINRRMSIGEAKARRAKKEMVEANLRLVISIAKKYTNRGLQFLDLIQEGNIGLMKAVDKFEYRRGYKFSTYATWWIRQAITRSIADQARTIRIPVHMIETINKLNRISRQMLQEMGREPTPEELAERMLMPEDKIRKVLKIAKEPISMETPIGDDEDSHLGDFIEDTTLELPLDSATTESLRAATHDVLAGLTAREAKVLRMRFGIDMNTDHTLEEVGKQFDVTRERIRQIEAKALRKLRHPSRSEVLRSFLDD

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

5 GO

Subcellular localization

Localization
Cytoplasmic

Gene Ontology (GO)

5
  • GO:0006355 Any process that modulates the frequency, rate or extent of cellular DNA-templated transcription.
  • GO:0016987 Sigma factors act as the promoter specificity subunit of eubacterial and plant plastid multisubunit RNA polymerases, whose core subunit composition is often described as alpha(2)-beta-beta-prime. Although sigma does not bind DNA on its own, when combined with the core to form the holoenzyme, the sigma factor binds specifically to promoter elements. The sigma subunit is released once elongation begins.
  • GO:0003700 A transcription regulator activity that modulates transcription of gene sets via selective and non-covalent binding to a specific double-stranded genomic DNA sequence (sometimes referred to as a motif) within a cis-regulatory region. Regulatory regions include promoters (proximal and distal) and enhancers. Genes are transcriptional units, and include bacterial operons.
  • GO:0003677 Any molecular function by which a gene product interacts selectively and non-covalently with DNA (deoxyribonucleic acid).
  • GO:0006352 The initial step of transcription, consisting of the assembly of the RNA polymerase preinitiation complex (PIC) at a gene promoter, as well as the formation of the first few bonds of the RNA transcript. Transcription initiation includes abortive initiation events, which occur when the first few nucleotides are repeatedly synthesized and then released, and ends when promoter clearance takes place.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

54 records
Show feature table
Start End DB Term Name
394 630 NCBIfam TIGR02393 RNA polymerase sigma factor RpoD
394 630 InterPro IPR012760 RNA polymerase sigma factor RpoD, C-terminal
471 547 FunFam G3DSA:1.10.10.10:FF:000002 RNA polymerase sigma factor SigA
566 619 Pfam PF04545 Sigma-70, region 4
566 619 InterPro IPR007630 RNA polymerase sigma-70 region 4
560 618 CDD cd06171 Sigma70_r4
422 435 ProSitePatterns PS00715 Sigma-70 factors family signature 1.
422 435 InterPro IPR000943 RNA polymerase sigma-70
132 465 SUPERFAMILY SSF88946 Sigma2 domain of RNA polymerase sigma factors
132 465 InterPro IPR013325 RNA polymerase sigma factor, region 2
115 145 Pfam PF00140 Sigma-70 factor, region 1.2
115 145 InterPro IPR009042 RNA polymerase sigma-70 region 1.2
548 632 Gene3D G3DSA:1.10.10.10 -
548 632 InterPro IPR036388 Winged helix-like DNA-binding domain superfamily
20 83 Gene3D G3DSA:1.10.220.120 -
20 83 InterPro IPR042189 Sigma-70 factor, region 1.1 superfamily
23 631 Hamap MF_00963 RNA polymerase sigma factor RpoD [rpoD].
23 631 InterPro IPR028630 RNA polymerase sigma factor RpoD
206 229 MobiDBLite mobidb-lite consensus disorder prediction
471 547 Gene3D G3DSA:1.10.10.10 -
471 547 InterPro IPR036388 Winged helix-like DNA-binding domain superfamily
592 612 Coils Coil Coil
20 83 FunFam G3DSA:1.10.220.120:FF:000001 RNA polymerase sigma factor RpoD
591 617 ProSitePatterns PS00716 Sigma-70 factors family signature 2.
591 617 InterPro IPR000943 RNA polymerase sigma-70
349 369 Coils Coil Coil
31 630 PANTHER PTHR30603 RNA POLYMERASE SIGMA FACTOR RPO
528 630 SUPERFAMILY SSF88659 Sigma3 and sigma4 domains of RNA polymerase sigma factors
528 630 InterPro IPR013324 RNA polymerase sigma factor, region 3/4-like
23 98 Pfam PF03979 Sigma-70 factor, region 1.1
23 98 InterPro IPR007127 RNA polymerase sigma factor 70, region 1.1
156 367 Pfam PF04546 Sigma-70, non-essential region
156 367 InterPro IPR007631 RNA polymerase sigma factor 70, non-essential domain
130 467 Gene3D G3DSA:1.10.601.10 RNA Polymerase Primary Sigma Factor
471 544 SUPERFAMILY SSF88659 Sigma3 and sigma4 domains of RNA polymerase sigma factors
471 544 InterPro IPR013324 RNA polymerase sigma factor, region 3/4-like
477 552 Pfam PF04539 Sigma-70 region 3
477 552 InterPro IPR007624 RNA polymerase sigma-70 region 3
398 467 Pfam PF04542 Sigma-70 region 2
398 467 InterPro IPR007627 RNA polymerase sigma-70 region 2
186 237 MobiDBLite mobidb-lite consensus disorder prediction
394 619 NCBIfam TIGR02937 sigma-70 family RNA polymerase sigma factor
394 619 InterPro IPR014284 RNA polymerase sigma-70 like domain
422 435 PRINTS PR00046 Major sigma-70 factor signature
606 617 PRINTS PR00046 Major sigma-70 factor signature
606 617 InterPro IPR000943 RNA polymerase sigma-70
591 606 PRINTS PR00046 Major sigma-70 factor signature
591 606 InterPro IPR000943 RNA polymerase sigma-70
446 454 PRINTS PR00046 Major sigma-70 factor signature
446 454 InterPro IPR000943 RNA polymerase sigma-70
570 582 PRINTS PR00046 Major sigma-70 factor signature
570 582 InterPro IPR000943 RNA polymerase sigma-70
548 631 FunFam G3DSA:1.10.10.10:FF:000004 RNA polymerase sigma factor SigA
130 467 FunFam G3DSA:1.10.601.10:FF:000002 RNA polymerase sigma factor RpoD

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
0.095
Show in viewer
Surrounding area
Pocket 2 P2Rank #2
0.093
Show in viewer
Surrounding area
Pocket 3 P2Rank #3
0.071
Show in viewer
Surrounding area
Pocket 4 P2Rank #4
0.055
Likely same site as FPocket 4 0.6 Å 12 shared residues 100% of smaller site
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Surrounding area
Pocket 5 P2Rank #5
0.049
Show in viewer
Surrounding area

Binding pockets · FPocket

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

Pocket 1 FPocket #4
0.769
Likely same site as P2Rank 4 0.6 Å 12 shared residues 100% of smaller site
Show in viewer
Surrounding area
Pocket 2 FPocket #44
0.351
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_A0A0H3H395
AlphaFold DB full sequence Viewing
ColabFold KP13_31791
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.

63 records
Chemistry signal

Structural ligand evidence is available for this target.

Direct evidence 0 same-protein records
Transferred evidence 13 records from similar proteins
Structural ligands 13 0 loaded crystals
Measured bioactivity 0 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
118 PDB via homolog 430.2 Da · LogP 3.06 · TPSA 0.0 Open detail RCSB PDB
1N7 PDB via homolog Detail RCSB PDB
1RL PDB via homolog Detail RCSB PDB
1RM PDB via homolog Detail RCSB PDB
88G 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
118 RCSB PDB P00579 430.2 Da LogP 3.06 TPSA 0.0 ✓ Ro5 ✓ Clean c1ccc(cc1)[Sb+](c2ccccc2)(c3ccccc3)c4ccccc4
1N7 RCSB PDB P00579 631.9 Da LogP 2.20 TPSA 164.4 2 viol. ✓ Clean C[C@H](CCC(=O)NCCC[N+](C)(C)CC(CS(=O)(=O)O)O)[C…
1RL RCSB PDB P00579 900.0 Da LogP 6.67 TPSA 216.4 3 viol. ✓ Clean CCN(CC)CCOc1cccc2c1N=C3c4c5c(c(c6c4C(=O)[C@](O6…
1RM RCSB PDB P00579 1035.2 Da LogP 6.62 TPSA 237.5 3 viol. ✓ Clean Cc1c(c2c3c4c1O[C@@](C4=O)(O/C=C/[C@@H]([C@H]([C…
88G RCSB PDB P9WGI1 358.4 Da LogP 3.97 TPSA 58.2 ✓ Ro5 ✓ Clean Cc1ccccc1NC(=O)[C@@H](Cc2ccccc2)NC(=O)c3ccccc3
BU3 RCSB PDB A0A0H3CAV3 90.1 Da LogP -0.25 TPSA 40.5 ✓ Ro5 ✓ Clean C[C@H]([C@@H](C)O)O
C2E RCSB PDB A0A023X3C8 690.4 Da LogP -3.05 TPSA 349.6 3 viol. ✓ Clean c1nc2c(n1[C@H]3[C@@H]([C@H]4[C@H](O3)CO[P@@](=O…
FI8 RCSB PDB P9WGI1 1058.1 Da LogP 6.23 TPSA 266.7 4 viol. ✓ Clean CCc1c(c(c(c(c1Cl)O)Cl)O)C(=O)O[C@@H]2[C@H](O[C@…
KNG RCSB PDB P00579 986.1 Da LogP 5.64 TPSA 292.6 4 viol. Alert Cc1c(c2c3c(cc(c2O)NC(=O)/C(=C\CC[C@@H]([C@@H]([…
RBT RCSB PDB Q5SKW1 847.0 Da LogP 4.62 TPSA 205.5 2 viol. Alert Cc1c(c2c3c4c1O[C@@](C4=O)(O\C=C\[C@@H]([C@H]([C…
RFP RCSB PDB P9WGI1 823.0 Da LogP 4.34 TPSA 220.1 3 viol. Alert Cc1c(c2c3c4c1O[C@@](C4=O)(O\C=C\[C@@H]([C@H]([C…
RFV RCSB PDB Q5SKW1 699.8 Da LogP 4.60 TPSA 204.5 3 viol. ✓ Clean Cc1c(c2c3c(cc(c2O)NC(=O)C(=C/C=C/[C@@H]([C@@H](…
SRN RCSB PDB P9WGI1 807.0 Da LogP 6.80 TPSA 161.2 2 viol. ✓ Clean C[C@H]1[C@H]2C\C=C\[C@H]3[C@@H]([C@H]4C[C@@H](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.