KpATCC43816 Protein target profile

fabR transcriptional repressor FabR transcriptional dual regulator

Accession: VK055_3224

Gene: AIK81785.1 fabR 3D evidence: AlphaFold DB model + ColabFold model Metabolism Not in network UniProt A0A0H3GH10

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Length 210

Pocket druggability (P2Rank · AlphaFold DB model) 0.778

Direct ligand evidence 0 52 total records

Functional annotation 0 EC 6 GO

Target summary

Strong target candidate with converging metabolic, structural and chemical evidence.

Automated synthesis of the evidence currently loaded. Review the underlying records before prioritizing this protein.

Main supporting evidence

Independent pocket support: P2Rank + FPocket Both predictors report a high-scoring binding site (P2Rank 0.78, FPocket 0.94). Use the 3D pocket comparison to verify whether they identify the same site. No similar human protein detected The current BLAST sequence screen did not find a significant human match, lowering apparent off-target risk. Core gene across strains Marked as conserved by both pan-genome tools: Roary and CoreCruncher. Strong predicted binding pocket FPocket selected-pocket score 0.94. This is a computational pocket signal, not binding validation. Review the complete evidence below

Risks to review

Evidence coverage

Core evidence streams are available for this target.

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: 3.1% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

Essential (DEG): Y
DEG identity (%): 66.502 Higher values support similarity to known essential genes.
DEG E-value: 4.67e-94 Smaller values mean stronger essential-gene similarity.

Structure confidence

ColabFold pLDDT: 92.91 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 A0A0H3GH10

Pocket Pocket 1

Druggability (FPocket) 0.938

Structure A0A0H3GH10

Pocket Pocket 1

ColabFold model

P2Rank 0.922 · Pocket 1

FPocket 0.894 · Pocket 1

Core conservation Conserved core gene

Roary core

CoreCruncher core

Gut microbiome 147 / 4744 genomes with a hit

Prevalence 3.1%

Metabolic context

Reactions catalyzed, pathway membership, and centrality in the genome-scale metabolic network.

This protein is not associated with the imported metabolic network for this genome.

Browse the genome's metabolic network

Imported from KpATCC43816.sbml · 2026-07-09

Sequence

Primary amino-acid sequence viewer.

MGVRAQQKEKTRRSLVEAAFSQLSAERSFASLSLREVAREAGIAPTSFYRHFRDVDELGLTMVDESGLMLRQLMRQARQRIAKGGSVIRTSVSTFMEFIGNNPNAFRLLLRERSGTSAAFRAAVAREIQHFIAELADYLELENHMPRAFTEAQAEAMVTIVFSAGAEALDVGPEQRRQLEERLVLQLRMISKGAYYWYRREQEKMSHHSE

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

6 GO

Subcellular localization

Localization: Cytoplasmic

Gene Ontology (GO)

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:0006631 The chemical reactions and pathways involving fatty acids, aliphatic monocarboxylic acids liberated from naturally occurring fats and oils by hydrolysis.
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:0006633 The chemical reactions and pathways resulting in the formation of a fatty acid, any of the aliphatic monocarboxylic acids that can be liberated by hydrolysis from naturally occurring fats and oils. Fatty acids are predominantly straight-chain acids of 4 to 24 carbon atoms, which may be saturated or unsaturated; branched fatty acids and hydroxy fatty acids also occur, and very long chain acids of over 30 carbons are found in waxes.
GO:0045717 Any process that stops, prevents, or reduces the frequency, rate or extent of the chemical reactions and pathways resulting in the formation of fatty acids.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

13 records

Show feature table

Start	End	DB	Term	Name
1	209	Hamap	MF_01190	HTH-type transcriptional repressor FabR [fabR].
1	209	InterPro	IPR023764	Transcriptional repressor HTH, FabR
10	70	ProSiteProfiles	PS50977	TetR-type HTH domain profile.
10	70	InterPro	IPR001647	DNA-binding HTH domain, TetR-type
22	58	Pfam	PF00440	Bacterial regulatory proteins, tetR family
22	58	InterPro	IPR001647	DNA-binding HTH domain, TetR-type
1	52	FunFam	G3DSA:1.10.10.60:FF:000034	HTH-type transcriptional repressor FabR
2	52	Gene3D	G3DSA:1.10.10.60	-
2	204	PANTHER	PTHR47752	HTH-TYPE TRANSCRIPTIONAL REPRESSOR FABR
2	77	SUPERFAMILY	SSF46689	Homeodomain-like
2	77	InterPro	IPR009057	Homeobox-like domain superfamily
53	209	Gene3D	G3DSA:1.10.357.10	Tetracycline Repressor, domain 2
53	209	FunFam	G3DSA:1.10.357.10:FF:000001	HTH-type transcriptional repressor FabR

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

Likely same site as FPocket 1 1.4 Å 16 shared residues 89% of smaller site

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Surrounding area

Pocket 2 P2Rank #2

0.058

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Surrounding area

Pocket 3 P2Rank #3

0.055

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Surrounding area

Pocket 4 P2Rank #4

0.034

Likely same site as FPocket 1 6.8 Å 4 shared residues 100% of smaller site

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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 #1

0.938

Likely same site as P2Rank 1 1.4 Å 16 shared residues 89% 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_A0A0H3GH10	AlphaFold DB	—	—	full sequence	—	Viewing
ColabFold VK055_3224	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

OLA PDB via homolog 282.5 Da · LogP 6.11 · TPSA 37.3 Open detail RCSB PDB

PLM PDB via homolog Detail RCSB PDB

ZINC1529498 ZINC proposed compound · Tanimoto 1.000 Detail ZINC

ZINC1530417 ZINC proposed compound · Tanimoto 1.000 Detail ZINC

ZINC1628119 ZINC proposed compound · Tanimoto 1.000 Detail ZINC

Highest-confidence structural evidence: ligands co-crystallized with this exact protein. If the source PDB is loaded in Target, use Open crystal to inspect it in the structure viewer.

No PDB structure with a co-crystallized ligand found for this exact protein.

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.

Ligand	Source crystal	UniProt (homolog)	MW · LogP · TPSA	Lipinski	PAINS	SMILES
OLA RCSB PDB	3LSP	Q9HUS3	282.5 Da LogP 6.11 TPSA 37.3	1 viol.	✓ Clean	`CCCCCCCC\C=C/CCCCCCCC(=O)O`
PLM RCSB PDB	3LSJ	Q9HUS3	256.4 Da LogP 5.55 TPSA 37.3	1 viol.	✓ Clean	`CCCCCCCCCCCCCCCC(=O)O`

Experimental bioactivity from ChEMBL measured directly on this protein. Score = pchembl (−log Ki/IC₅₀; higher = more potent).

No ChEMBL bioactivity data found for this exact protein.

Bioactivity inferred from similar proteins in ChEMBL. Score = pchembl (−log Ki/IC₅₀; higher = more potent).

No ChEMBL hits found through similar proteins.

Proposed virtual-screening candidates from ZINC. Score = Tanimoto similarity to a known binder (0–1; higher = more similar).

Ligand	Tanimoto	MW · LogP · TPSA	Lipinski	PAINS	SMILES
ZINC1529498 ZINC	1.000	200.3 Da LogP 3.99 TPSA 37.3	✓ Ro5	✓ Clean	`CCCCCCCCCCCC(=O)O`
ZINC1530417 ZINC	1.000	228.4 Da LogP 4.77 TPSA 37.3	✓ Ro5	✓ Clean	`CCCCCCCCCCCCCC(=O)O`
ZINC1628119 ZINC	1.000	214.3 Da LogP 4.38 TPSA 37.3	✓ Ro5	✓ Clean	`CCCCCCCCCCCCC(=O)O`
ZINC64633397 ZINC	1.000	226.4 Da LogP 4.55 TPSA 37.3	✓ Ro5	✓ Clean	`CCCCCC/C=C\CCCCCC(=O)O`
ZINC1531062 ZINC	0.917	226.4 Da LogP 4.55 TPSA 37.3	✓ Ro5	✓ Clean	`CCCC/C=C/CCCCCCCC(=O)O`
ZINC2504617 ZINC	0.917	240.4 Da LogP 4.94 TPSA 37.3	✓ Ro5	✓ Clean	`CCCC/C=C/CCCCCCCCC(=O)O`
ZINC32786138 ZINC	0.917	226.4 Da LogP 4.55 TPSA 37.3	✓ Ro5	✓ Clean	`CCCCCCCC/C=C/CCCC(=O)O`
ZINC4529321 ZINC	0.917	226.4 Da LogP 4.55 TPSA 37.3	✓ Ro5	✓ Clean	`CCCC/C=C\CCCCCCCC(=O)O`
ZINC5260769 ZINC	0.917	240.4 Da LogP 4.94 TPSA 37.3	✓ Ro5	✓ Clean	`CCCC/C=C\CCCCCCCCC(=O)O`
ZINC138457918 ZINC	0.850	228.3 Da LogP 3.56 TPSA 54.4	✓ Ro5	✓ Clean	`CCCCCCCC(=O)CCCCC(=O)O`
ZINC138458029 ZINC	0.850	228.3 Da LogP 3.56 TPSA 54.4	✓ Ro5	✓ Clean	`CCCCCCC(=O)CCCCCC(=O)O`
ZINC144395054 ZINC	0.850	242.4 Da LogP 3.95 TPSA 54.4	✓ Ro5	✓ Clean	`CCCCCC(=O)CCCCCCCC(=O)O`
ZINC14619628 ZINC	0.850	270.4 Da LogP 4.73 TPSA 54.4	✓ Ro5	✓ Clean	`CCCCCC(=O)CCCCCCCCCC(=O)O`
ZINC196749828 ZINC	0.850	214.3 Da LogP 3.17 TPSA 54.4	✓ Ro5	✓ Clean	`CCCCCCC(=O)CCCCC(=O)O`
ZINC2113934076 ZINC	0.850	256.4 Da LogP 4.34 TPSA 54.4	✓ Ro5	✓ Clean	`CCCCCCC(=O)CCCCCCCC(=O)O`
ZINC2113934082 ZINC	0.850	256.4 Da LogP 4.34 TPSA 54.4	✓ Ro5	✓ Clean	`CCCCCCCC(=O)CCCCCCC(=O)O`
ZINC2113934083 ZINC	0.850	256.4 Da LogP 4.34 TPSA 54.4	✓ Ro5	✓ Clean	`CCCCCCCCCC(=O)CCCCC(=O)O`
ZINC2243670 ZINC	0.850	228.3 Da LogP 3.56 TPSA 54.4	✓ Ro5	✓ Clean	`CCCCCC(=O)CCCCCCC(=O)O`
ZINC2569203 ZINC	0.850	214.3 Da LogP 3.17 TPSA 54.4	✓ Ro5	✓ Clean	`CCCCCC(=O)CCCCCC(=O)O`
ZINC4798470 ZINC	0.850	270.4 Da LogP 4.73 TPSA 54.4	✓ Ro5	✓ Clean	`CCCCCCC(=O)CCCCCCCCC(=O)O`
ZINC5973005 ZINC	0.850	242.4 Da LogP 3.95 TPSA 54.4	✓ Ro5	✓ Clean	`CCCCCCC(=O)CCCCCCC(=O)O`
ZINC71418182 ZINC	0.850	270.4 Da LogP 4.73 TPSA 54.4	✓ Ro5	✓ Clean	`CCCCCCCCCCC(=O)CCCCC(=O)O`
ZINC79244776 ZINC	0.850	270.4 Da LogP 4.73 TPSA 54.4	✓ Ro5	✓ Clean	`CCCCCCCC(=O)CCCCCCCC(=O)O`
ZINC86037082 ZINC	0.850	270.4 Da LogP 4.73 TPSA 54.4	✓ Ro5	✓ Clean	`CCCCCCCCCC(=O)CCCCCC(=O)O`
ZINC86037089 ZINC	0.850	270.4 Da LogP 4.73 TPSA 54.4	✓ Ro5	✓ Clean	`CCCCCCCCC(=O)CCCCCCC(=O)O`
ZINC86039283 ZINC	0.850	242.4 Da LogP 3.95 TPSA 54.4	✓ Ro5	✓ Clean	`CCCCCCCCC(=O)CCCCC(=O)O`
ZINC3160730 ZINC	0.810	214.3 Da LogP 3.17 TPSA 54.4	✓ Ro5	✓ Clean	`CCCCCCCC(=O)CCCC(=O)O`
ZINC4582907 ZINC	0.810	200.3 Da LogP 2.78 TPSA 54.4	✓ Ro5	✓ Clean	`CCCCCCC(=O)CCCC(=O)O`
ZINC4727003 ZINC	0.810	312.4 Da LogP 4.69 TPSA 71.4	✓ Ro5	✓ Clean	`CCCCCCC(=O)CCC(=O)CCCCCCCC(=O)O`
ZINC86037074 ZINC	0.810	270.4 Da LogP 4.73 TPSA 54.4	✓ Ro5	✓ Clean	`CCCCCCCCCCCC(=O)CCCC(=O)O`
ZINC2378801 ZINC	0.800	200.3 Da LogP 2.78 TPSA 54.4	✓ Ro5	✓ Clean	`CCCCCC(=O)CCCCC(=O)O`
ZINC31439572 ZINC	0.778	224.3 Da LogP 4.32 TPSA 37.3	✓ Ro5	✓ Clean	`CCCCC/C=C\C/C=C\CCCC(=O)O`
ZINC2113934081 ZINC	0.762	270.4 Da LogP 4.73 TPSA 54.4	✓ Ro5	✓ Clean	`CCCCC(=O)CCCCCCCCCCC(=O)O`
ZINC2243668 ZINC	0.762	214.3 Da LogP 3.17 TPSA 54.4	✓ Ro5	✓ Clean	`CCCCC(=O)CCCCCCC(=O)O`
ZINC2378799 ZINC	0.762	200.3 Da LogP 2.78 TPSA 54.4	✓ Ro5	✓ Clean	`CCCCC(=O)CCCCCC(=O)O`
ZINC33820423 ZINC	0.762	242.4 Da LogP 3.95 TPSA 54.4	✓ Ro5	✓ Clean	`CCCCC(=O)CCCCCCCCC(=O)O`
ZINC198743420 ZINC	0.750	228.3 Da LogP 2.83 TPSA 74.6	✓ Ro5	✓ Clean	`O=C(O)CCC/C=C\CCCCCC(=O)O`
ZINC2387442 ZINC	0.739	246.4 Da LogP 4.34 TPSA 37.3	✓ Ro5	✓ Clean	`CCCCCCCCSCCCCC(=O)O`
ZINC31778284 ZINC	0.739	310.4 Da LogP 4.47 TPSA 71.4	✓ Ro5	✓ Clean	`CCCCCCC(=O)/C=C\C(=O)CCCCCCCC(=O)O`
ZINC5540108 ZINC	0.739	310.4 Da LogP 4.47 TPSA 71.4	✓ Ro5	✓ Clean	`CCCCCCC(=O)/C=C/C(=O)CCCCCCCC(=O)O`
ZINC59545317 ZINC	0.727	200.3 Da LogP 2.78 TPSA 54.4	✓ Ro5	✓ Clean	`CCCCCCCC(=O)CCC(=O)O`
ZINC59545320 ZINC	0.727	270.4 Da LogP 4.73 TPSA 54.4	✓ Ro5	✓ Clean	`CCCCCCCCCCCCC(=O)CCC(=O)O`
ZINC59545336 ZINC	0.727	214.3 Da LogP 3.17 TPSA 54.4	✓ Ro5	✓ Clean	`CCCCCCCCC(=O)CCC(=O)O`
ZINC33954988 ZINC	0.719	296.5 Da LogP 4.86 TPSA 57.5	✓ Ro5	✓ Clean	`CCCCC/C=C\C[C@H](O)/C=C/CCCCCCC(=O)O`
ZINC33954989 ZINC	0.719	296.5 Da LogP 4.86 TPSA 57.5	✓ Ro5	✓ Clean	`CCCCC/C=C\C[C@@H](O)/C=C/CCCCCCC(=O)O`
ZINC33820298 ZINC	0.714	250.4 Da LogP 4.88 TPSA 37.3	✓ Ro5	✓ Clean	`CCCCC/C=C/C/C=C/C/C=C/CCC(=O)O`
ZINC117423077 ZINC	0.708	230.3 Da LogP 3.35 TPSA 57.5	✓ Ro5	✓ Clean	`CCCCCCC[C@@H](O)CCCCC(=O)O`
ZINC33820346 ZINC	0.708	316.5 Da LogP 4.27 TPSA 77.8	✓ Ro5	✓ Clean	`CCCCC[C@H](O)[C@@H](O)CCCCCCCCCCC(=O)O`
ZINC59200976 ZINC	0.708	272.4 Da LogP 4.52 TPSA 57.5	✓ Ro5	✓ Clean	`CCCCCCCCC[C@@H](O)CCCCCC(=O)O`
ZINC85858219 ZINC	0.708	272.4 Da LogP 4.52 TPSA 57.5	✓ Ro5	✓ Clean	`CCCCCCCCCC[C@H](O)CCCCC(=O)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.

Sequence

UniProt A0A0H3GH10