Protein profile

VK055_4620

putative sensory kinase in two-component system

Genome: KpATCC43816

Gene: AIK83154.1 Structure source: AlphaFold + ColabFold UniProt A0A0H3GRS8
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Amino acids 473
Annotations 4
Features 40
PDB binders 4
Druggability 0.706

Overview

Basic information about this protein and its source genome.

Accession
VK055_4620
Assembly
Klebsiella pneumoniae subsp. pneumoniae strain ATCC 43816 KPPR1, complete genome
Gene
AIK83154.1
Status
annotated
Amino acids
473
Structure source
AlphaFold + ColabFold
GO
GO:0016772 Catalysis of the transfer of a phosphorus-containing group from one compound (donor) to another (acceptor). GO:0000155 Catalysis of the phosphorylation of a histidine residue in response to detection of an extracellular signal such as a chemical ligand or change in environment, to initiate a change in cell state or activity. The two-component sensor is a histidine kinase that autophosphorylates a histidine residue in its active site. The phosphate is then transferred to an aspartate residue in a downstream response regulator, to trigger a response. GO:0007165 The cellular process in which a signal is conveyed to trigger a change in the activity or state of a cell. Signal transduction begins with reception of a signal (e.g. a ligand binding to a receptor or receptor activation by a stimulus such as light), or for signal transduction in the absence of ligand, signal-withdrawal or the activity of a constitutively active receptor. Signal transduction ends with regulation of a downstream cellular process, e.g. regulation of transcription or regulation of a metabolic process. Signal transduction covers signaling from receptors located on the surface of the cell and signaling via molecules located within the cell. For signaling between cells, signal transduction is restricted to events at and within the receiving cell. GO:0016310 The process of introducing a phosphate group into a molecule, usually with the formation of a phosphoric ester, a phosphoric anhydride or a phosphoric amide.

Target profile

Computed evidence for target prioritization.

Human off-target
No hit
Human identity (%)
0.0
Gut microbiome off-target
hit
Essential (DEG)
N
DEG identity (%)
33.333
Localization
CytoplasmicMembrane
ColabFold pLDDT
86.97

Selected Druggability evidence

AlphaFold / UniProt model

Selected Druggability is the FPocket score chosen for ranking using the curated structure priority. The 3D viewer may show a different loaded structure, so its visible pockets can differ.

FPocket 0.706
Structure A0A0H3GRS8
Pocket Pocket 3
P2Rank 0.933
Structure A0A0H3GRS8
Pocket Pocket 1
ColabFold model
FPocket 0.589 · Pocket 2
P2Rank 0.933 · Pocket 1
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 110 / 4744 genomes with a hit
Normalized 0.023

Sequence

Primary amino-acid sequence viewer.

Functional Annotations

Enzyme classification and Gene Ontology terms linked to this protein.

4 GO

Gene Ontology (GO)

4
  • GO:0016772 Catalysis of the transfer of a phosphorus-containing group from one compound (donor) to another (acceptor).
  • GO:0000155 Catalysis of the phosphorylation of a histidine residue in response to detection of an extracellular signal such as a chemical ligand or change in environment, to initiate a change in cell state or activity. The two-component sensor is a histidine kinase that autophosphorylates a histidine residue in its active site. The phosphate is then transferred to an aspartate residue in a downstream response regulator, to trigger a response.
  • GO:0007165 The cellular process in which a signal is conveyed to trigger a change in the activity or state of a cell. Signal transduction begins with reception of a signal (e.g. a ligand binding to a receptor or receptor activation by a stimulus such as light), or for signal transduction in the absence of ligand, signal-withdrawal or the activity of a constitutively active receptor. Signal transduction ends with regulation of a downstream cellular process, e.g. regulation of transcription or regulation of a metabolic process. Signal transduction covers signaling from receptors located on the surface of the cell and signaling via molecules located within the cell. For signaling between cells, signal transduction is restricted to events at and within the receiving cell.
  • GO:0016310 The process of introducing a phosphate group into a molecule, usually with the formation of a phosphoric ester, a phosphoric anhydride or a phosphoric amide.

Sequence Features

Domain/signature hits from InterPro and related databases.

40 records
Show feature table
Start End DB Term Name
25 30 Phobius SIGNAL_PEPTIDE_C_REGION C-terminal region of a signal peptide.
15 34 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
365 468 CDD cd00075 HATPase
199 473 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
307 470 SUPERFAMILY SSF55874 ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase
307 470 InterPro IPR036890 Histidine kinase/HSP90-like ATPase superfamily
228 315 FunFam G3DSA:1.10.287.130:FF:000039 Sensor-like histidine kinase YfhK
247 313 CDD cd00082 HisKA
247 313 InterPro IPR003661 Signal transduction histidine kinase, dimerisation/phosphoacceptor domain
256 472 ProSiteProfiles PS50109 Histidine kinase domain profile.
256 472 InterPro IPR005467 Histidine kinase domain
1 13 Phobius SIGNAL_PEPTIDE_N_REGION N-terminal region of a signal peptide.
175 197 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
294 314 Coils Coil Coil
31 174 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
365 470 Pfam PF02518 Histidine kinase-, DNA gyrase B-, and HSP90-like ATPase
365 470 InterPro IPR003594 Histidine kinase/HSP90-like ATPase
236 317 SUPERFAMILY SSF47384 Homodimeric domain of signal transducing histidine kinase
236 317 InterPro IPR036097 Signal transduction histidine kinase, dimerisation/phosphoacceptor domain superfamily
1 30 Phobius SIGNAL_PEPTIDE Signal peptide region
249 317 SMART SM00388 HisKA_10
249 317 InterPro IPR003661 Signal transduction histidine kinase, dimerisation/phosphoacceptor domain
250 316 Pfam PF00512 His Kinase A (phospho-acceptor) domain
250 316 InterPro IPR003661 Signal transduction histidine kinase, dimerisation/phosphoacceptor domain
360 472 SMART SM00387 HKATPase_4
360 472 InterPro IPR003594 Histidine kinase/HSP90-like ATPase
397 411 PRINTS PR00344 Bacterial sensor protein C-terminal signature
397 411 InterPro IPR004358 Signal transduction histidine kinase-related protein, C-terminal
415 425 PRINTS PR00344 Bacterial sensor protein C-terminal signature
415 425 InterPro IPR004358 Signal transduction histidine kinase-related protein, C-terminal
432 450 PRINTS PR00344 Bacterial sensor protein C-terminal signature
432 450 InterPro IPR004358 Signal transduction histidine kinase-related protein, C-terminal
456 469 PRINTS PR00344 Bacterial sensor protein C-terminal signature
456 469 InterPro IPR004358 Signal transduction histidine kinase-related protein, C-terminal
14 24 Phobius SIGNAL_PEPTIDE_H_REGION Hydrophobic region of a signal peptide.
193 309 Gene3D G3DSA:1.10.287.130 -
242 472 PANTHER PTHR43711 TWO-COMPONENT HISTIDINE KINASE
310 470 Gene3D G3DSA:3.30.565.10 -
310 470 InterPro IPR036890 Histidine kinase/HSP90-like ATPase superfamily
175 198 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.

3D Structure

Selected loaded structure. Experimental PDB entries may cover only a portion of the sequence; predicted models typically cover the full protein.

3D visualization script Full viewer

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Structural evidence

0 + 2

Experimental PDB entries and predicted models. Click Switch to display a different structure in the viewer.

Entry Method Resolution Chain Coverage Links Status
AlphaFold AF_A0A0H3GRS8
AlphaFold — — full sequence — Viewing
ColabFold VK055_4620
ColabFold — — full sequence — Loaded
Pocket details FPocket · P2Rank — toggle visibility and zoom from here, or open full viewer

Pockets (FPOCKET)

Showing top-ranked FPocket candidates by druggability. Druggability is color-coded: high (0.7 or higher), medium (0.4 to 0.69), low (below 0.4).

FPOCKET Sticks Spheres Surfaces Druggability Labels Zoom Positions
3 0.706
1 0.65
13 0.445

Pockets (P2RANK)

Showing top-ranked P2Rank candidates by probability. Probability is color-coded per P2Rank calibration: high (≥ 0.5), medium (0.2 – 0.49), low (< 0.2).

P2RANK Sticks Spheres Surfaces Score Probability Labels Zoom Positions
1 20.87 0.863
2 1.58 0.024

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

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
ANP
4BIW
P0AE82 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)…
EMC
3A0W
Q9X180 229.7 Da LogP 0.97 TPSA 0.0 ✓ Ro5 ✓ Clean CC[Hg+]
EMT
3A0W
Q9X180 382.8 Da LogP 2.91 TPSA 37.3 ✓ Ro5 ✓ Clean CC[Hg]Sc1ccccc1C(=O)O
PG0
5UKV
P71815 120.1 Da LogP -0.36 TPSA 38.7 ✓ Ro5 ✓ Clean COCCOCCO

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.