KpATCC43816 Protein target profile

bifunctional protein RfaE, domain I

Accession: VK055_4017

Gene: AIK82564.1 rfaE 3D evidence: AlphaFold DB model + ColabFold model Metabolism Not in network UniProt A0A0H3GVR8
Length 477
Pocket druggability (P2Rank · AlphaFold DB model) 0.909
Direct ligand evidence 0 62 total records
Functional annotation 0 EC 12 GO
Target summary

Target candidate with partial support; inspect missing evidence before prioritizing.

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 (%)
39.706 Lower values reduce human off-target concern.
Human E-value
1.44e-06
Gut microbiome similarity
3.6% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

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

Structure confidence

ColabFold pLDDT
90.91 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) 0.909
Structure A0A0H3GVR8
Pocket Pocket 1
Druggability (FPocket) 0.373
Structure A0A0H3GVR8
Pocket Pocket 25
ColabFold model
P2Rank 0.87 · Pocket 1
FPocket 0.314 · Pocket 16
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 170 / 4744 genomes with a hit
Prevalence 3.6%

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.

MKVTLPEFERAGVLVVGDVMLDRYWYGPTSRISPEAPVPVVKVENIEERPGGAANVAMNIASLGATSRLVGLTGIDDAARALSQALANVNVKCDFVSVPTHPTITKLRVLSRNQQLIRLDFEEGFSGVDPQPMHERIQQALGSIGALVLSDYAKGALTSVQTMIRLAREAGVPVLIDPKGTDFERYRGATLLTPNLSEFEAVVGKCQDEAQIVERGMKLIAEFELSALLVTRSEQGMTLLQPGRPPLHMPTQAQEVYDVTGAGDTVIGVLAATLASGNTLEEACYFANAAAGVVVGKLGTSTVSPVELENAVRGRAETGFGVMSEEELKQAVAAARKRGEKVVMTNGVFDILHAGHVSYLANARKLGDRLIVAVNSDASTKRLKGETRPVNPLEQRMIVLGALEAVDWVVSFEEDTPQRLIAGILPDLLVKGGDYKPEQIAGSEEVWANGGEVLVLNFEDGCSTTNIIKKIQKDSDK

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

12 GO

Subcellular localization

Localization
Cytoplasmic

Gene Ontology (GO)

12
  • 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:0016773 Catalysis of the transfer of a phosphorus-containing group from one compound (donor) to an alcohol group (acceptor).
  • GO:0016301 Catalysis of the transfer of a phosphate group, usually from ATP, to a substrate molecule.
  • GO:0005975 The chemical reactions and pathways involving carbohydrates, any of a group of organic compounds based of the general formula Cx(H2O)y.
  • GO:0016779 Catalysis of the transfer of a nucleotidyl group from one compound (donor) to another (acceptor).
  • GO:0009058 A cellular process consisting of the biochemical pathways by which a living organism synthesizes chemical substances. This typically represents the energy-requiring part of metabolism in which simpler substances are transformed into more complex ones.
  • GO:0005829 The part of the cytoplasm that does not contain organelles but which does contain other particulate matter, such as protein complexes.
  • GO:0005524 Binding to ATP, adenosine 5'-triphosphate, a universally important coenzyme and enzyme regulator.
  • GO:0033785 Catalysis of the reaction: D-alpha,beta-D-heptose-7-phosphate + ATP = D-beta-D-heptose-1,7-bisphosphate + ADP.
  • GO:0033786 Catalysis of the reaction: D-beta-D-heptose-1-phosphate + ATP = ADP-D-glycero-D-manno-heptose.
  • GO:0097171 The chemical reactions and pathways resulting in the formation of ADP-L-glycero-beta-D-manno-heptose, an ADP-L-glycero-D-manno-heptose having beta-configuration at the anomeric centre of the heptose. ADP-L-glycero-beta-D-manno-heptose (also called ADP-L-beta-D-heptose or ADP-L-glycero-D-manno-heptose) is a nucleotide-sugar precursor of the inner core lipopolysaccharide (LPS) from D-glycero-beta-D-manno-heptose 7-phosphate.
  • GO:0009244 The chemical reactions and pathways resulting in the formation of the core region of bacterial lipopolysaccharides, which contains ten saccharide residues.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

26 records
Show feature table
Start End DB Term Name
13 305 Pfam PF00294 pfkB family carbohydrate kinase
13 305 InterPro IPR011611 Carbohydrate kinase PfkB
340 471 SUPERFAMILY SSF52374 Nucleotidylyl transferase
51 74 ProSitePatterns PS00583 pfkB family of carbohydrate kinases signature 1.
51 74 InterPro IPR002173 Carbohydrate/purine kinase, PfkB, conserved site
2 309 FunFam G3DSA:3.40.1190.20:FF:000002 Bifunctional protein HldE
4 474 Hamap MF_01603 Bifunctional protein HldE [hldE].
4 474 InterPro IPR023030 Bifunctional protein HldE
12 310 SUPERFAMILY SSF53613 Ribokinase-like
12 310 InterPro IPR029056 Ribokinase-like
320 477 Gene3D G3DSA:3.40.50.620 HUPs
320 477 InterPro IPR014729 Rossmann-like alpha/beta/alpha sandwich fold
2 309 Gene3D G3DSA:3.40.1190.20 -
2 309 InterPro IPR029056 Ribokinase-like
2 315 PANTHER PTHR46969 BIFUNCTIONAL PROTEIN HLDE
345 435 Pfam PF01467 Cytidylyltransferase-like
345 435 InterPro IPR004821 Cytidyltransferase-like domain
332 473 NCBIfam TIGR02199 D-glycero-beta-D-manno-heptose 1-phosphate adenylyltransferase
332 473 InterPro IPR011914 RfaE bifunctional protein, domain II
5 312 NCBIfam TIGR02198 D-glycero-beta-D-manno-heptose-7-phosphate kinase
5 312 InterPro IPR011913 RfaE bifunctional protein, domain I
320 477 FunFam G3DSA:3.40.50.620:FF:000028 Bifunctional protein HldE
13 309 CDD cd01172 RfaE_like
13 309 InterPro IPR011913 RfaE bifunctional protein, domain I
342 408 NCBIfam TIGR00125 cytidyltransferase-like domain
342 408 InterPro IPR004821 Cytidyltransferase-like domain

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
0.909
Likely same site as FPocket 25 6.0 Å 16 shared residues 100% of smaller site
Show in viewer
Surrounding area
Pocket 2 P2Rank #2
0.834
Show in viewer
Surrounding area
Pocket 3 P2Rank #3
0.066
Show in viewer
Surrounding area

Binding pockets · FPocket

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

Pocket 1 FPocket #25
0.373 Unusual size
Likely same site as P2Rank 1 6.0 Å 16 shared residues 100% of smaller site
Show in viewer
Surrounding area
Residue sets
UniProt: Active site:264-264
UniProt: Binding site:195-198
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_A0A0H3GVR8
AlphaFold DB full sequence Viewing
ColabFold VK055_4017
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.

62 records
Chemistry signal

Structural and bioactivity evidence are both available for this target.

Direct evidence 0 same-protein records
Transferred evidence 12 records from similar proteins
Structural ligands 10 0 loaded crystals
Measured bioactivity 2 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
ACP PDB via homolog 505.2 Da · LogP -1.52 · TPSA 269.9 Open detail RCSB PDB
ANP PDB via homolog Detail RCSB PDB
C2G PDB via homolog Detail RCSB PDB
CDC PDB via homolog Detail RCSB PDB
CHT 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
ACP RCSB PDB A0A3S7X0F5 505.2 Da LogP -1.52 TPSA 269.9 3 viol. ✓ Clean c1nc(c2c(n1)n(cn2)[C@H]3[C@@H]([C@@H]([C@H](O3)…
ANP RCSB PDB B4EB35 506.2 Da LogP -2.06 TPSA 281.9 3 viol. ✓ Clean c1nc(c2c(n1)n(cn2)[C@H]3[C@@H]([C@@H]([C@H](O3)…
C2G RCSB PDB P27623 477.3 Da LogP -2.95 TPSA 253.3 2 viol. ✓ Clean C1=CN(C(=O)N=C1N)[C@H]2[C@@H]([C@@H]([C@H](O2)C…
CDC RCSB PDB Q8IEE9 488.3 Da LogP -2.23 TPSA 215.7 1 viol. ✓ Clean C[N+](C)(C)CCO[P@@](=O)([O-])O[P@@](=O)(O)OC[C@…
CHT RCSB PDB Q8IEE9 104.2 Da LogP -0.32 TPSA 20.2 ✓ Ro5 ✓ Clean C[N+](C)(C)CCO
GMZ RCSB PDB B4EB35 370.1 Da LogP -3.63 TPSA 223.7 1 viol. ✓ Clean C([C@H]([C@@H]1[C@H]([C@@H]([C@@H]([C@@H](O1)OP…
M7B RCSB PDB B4EB35 290.2 Da LogP -3.74 TPSA 177.1 1 viol. ✓ Clean C([C@H]([C@@H]1[C@H]([C@@H]([C@@H]([C@@H](O1)O)…
P33 RCSB PDB Q8IEE9 326.4 Da LogP -0.93 TPSA 95.8 ✓ Ro5 ✓ Clean C(COCCOCCOCCOCCOCCOCCO)O
PC RCSB PDB Q8IEE9 184.2 Da LogP -0.20 TPSA 66.8 ✓ Ro5 ✓ Clean C[N+](C)(C)CCOP(=O)(O)O
RIB RCSB PDB A1A6H3 150.1 Da LogP -2.58 TPSA 90.2 ✓ Ro5 ✓ Clean C([C@@H]1[C@H]([C@H]([C@H](O1)O)O)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.