KpKP13 Protein target profile

Sensor protein kdpD

Accession: KP13_03298

Gene: AHE45677.1 kdpD 3D evidence: AlphaFold DB model + ColabFold model UniProt A0A0H3GK10
Length 895
Pocket druggability (P2Rank · AlphaFold DB model) 0.926
Direct ligand evidence 0 54 total records
Functional annotation 1 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
No hit
Gut microbiome similarity
2.2% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

Essential (DEG)
N
DEG identity (%)
0.0 Higher values support similarity to known essential genes.

Structure confidence

ColabFold pLDDT
81.57 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) 0.926
Structure A0A0H3GK10
Pocket Pocket 1
Druggability (FPocket) 0.334
Structure A0A0H3GK10
Pocket Pocket 69
ColabFold model
P2Rank 0.941 · Pocket 1
FPocket 0.916 · Pocket 62
Core conservation Accessory gene
Roary core
CoreCruncher accessory
Gut microbiome 103 / 4744 genomes with a hit
Prevalence 2.2%

Sequence

Primary amino-acid sequence viewer.

MSDEPLRPDPDRLLQHTAAPHRGKLKVFFGACAGVGKTWAMLAEAQRLRAQGLDILIGVAETHGRKETAAMLQGLSTLPPRRLAHRGRYVYEFDLDAALARRPALILVDELAHSNAPGSRHPKRWQDVDELLEAGIDVFTTVNVQHLESLNDVVSGITGVQVRETVPDPFFDAADDVVLVDLPPDDLRQRLNEGKVYIGGQAERAIENFFRKGNLIALRELALRRTADRVDEQMRAWRDRQGQEKVWHTRDAILLCIGHNTGSEKLVRAAARLAARLGSVWHAVYVETPSLHRLPEARRRAILAALRLAQELGAETATLSDPSEEKAVLHYAREHNLGKIVIGRQSKRRGWDRSGFADRLARHAPDLDLVVIALDEKPSPLPARGNDSRTALEKWRLQLQGCAVAVALCAIITLVAMQWLMAFEAANLVMLYLLGVVLIALVYGRWPSVLATVINVISFDLFFVAPRGTLAVSDVQYLLTFGVMLTVGLLIGNLTAGVRYQARVARYRERRTRHLYEMSKALAVGRSQQDIATTSERFIASTFQARSQLLLPDAQGKLLPLTHQPGLTPWDDAIARWSFDKGQPAGAGTDTLPGVPYQILPLKSAARTWGLLVVEPENLRQLMIPEQQRLLETFTLLVASALERLTLTASEEQARLTSERESLRNSLLAALSHDLRTPLTVLFGQAEILTLDLASEGSKHAPQANEIRQHVLNTTRLVNNLLDMARIQSGGFNLHKEWLTLEEVVGSALRMLEPSLGGQHIQLDLPDPLQLVHVDGPLFERVLINLLENAHKYAGARASIGIRAEADARQLSLEVWDNGPGIPAGQEQTIFDKFARGNKESAIPGVGLGLAICQAIVDVHGGTISASNRPEGGASFRVTLPGETPPELEELPEEL

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

1 EC 12 GO

Subcellular localization

Localization
CytoplasmicMembrane

Enzyme Commission (EC)

1

Gene Ontology (GO)

12
  • 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.
  • GO:0016772 Catalysis of the transfer of a phosphorus-containing group from one compound (donor) to another (acceptor).
  • GO:0004673 Catalysis of the reaction: ATP + protein L-histidine = ADP + protein phospho-L-histidine.
  • GO:0016020 A lipid bilayer along with all the proteins and protein complexes embedded in it and attached to it.
  • GO:0005515 Binding to a protein.
  • GO:0000160 A conserved series of molecular signals found in prokaryotes and eukaryotes; involves autophosphorylation of a histidine kinase and the transfer of the phosphate group to an aspartate that then acts as a phospho-donor to response regulator proteins.
  • 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:0005737 The contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
  • GO:0005886 The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.
  • GO:0005524 Binding to ATP, adenosine 5'-triphosphate, a universally important coenzyme and enzyme regulator.
  • GO:0042802 Binding to an identical protein or proteins.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

63 records
Show feature table
Start End DB Term Name
779 880 CDD cd00075 HATPase
512 656 FunFam G3DSA:3.30.450.40:FF:000038 Two-component sensor histidine kinase KdpD
1 398 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
253 365 SUPERFAMILY SSF52402 Adenine nucleotide alpha hydrolases-like
253 373 CDD cd01987 USP_OKCHK
719 886 SUPERFAMILY SSF55874 ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase
719 886 InterPro IPR036890 Histidine kinase/HSP90-like ATPase superfamily
428 445 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
661 726 CDD cd00082 HisKA
661 726 InterPro IPR003661 Signal transduction histidine kinase, dimerisation/phosphoacceptor domain
448 465 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
19 229 Gene3D G3DSA:3.40.50.300 -
19 229 InterPro IPR027417 P-loop containing nucleoside triphosphate hydrolase
21 230 Pfam PF02702 Osmosensitive K+ channel His kinase sensor domain
21 230 InterPro IPR003852 Signal transduction histidine kinase, osmosensitive K+ channel sensor, N-terminal
501 895 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
466 476 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
829 839 PRINTS PR00344 Bacterial sensor protein C-terminal signature
829 839 InterPro IPR004358 Signal transduction histidine kinase-related protein, C-terminal
868 881 PRINTS PR00344 Bacterial sensor protein C-terminal signature
868 881 InterPro IPR004358 Signal transduction histidine kinase-related protein, C-terminal
844 862 PRINTS PR00344 Bacterial sensor protein C-terminal signature
844 862 InterPro IPR004358 Signal transduction histidine kinase-related protein, C-terminal
811 825 PRINTS PR00344 Bacterial sensor protein C-terminal signature
811 825 InterPro IPR004358 Signal transduction histidine kinase-related protein, C-terminal
19 229 FunFam G3DSA:3.40.50.300:FF:000483 Sensor histidine kinase KdpD
477 500 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
403 507 Pfam PF13493 Domain of unknown function (DUF4118)
403 507 InterPro IPR025201 Sensor protein KdpD, transmembrane domain
658 731 SUPERFAMILY SSF47384 Homodimeric domain of signal transducing histidine kinase
658 731 InterPro IPR036097 Signal transduction histidine kinase, dimerisation/phosphoacceptor domain superfamily
734 886 FunFam G3DSA:3.30.565.10:FF:000042 Two-component sensor histidine kinase KdpD
658 732 Gene3D G3DSA:1.10.287.130 -
232 372 Gene3D G3DSA:3.40.50.620 HUPs
232 372 InterPro IPR014729 Rossmann-like alpha/beta/alpha sandwich fold
444 447 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
399 419 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
1 885 PANTHER PTHR45569 SENSOR PROTEIN KDPD
670 884 ProSiteProfiles PS50109 Histidine kinase domain profile.
670 884 InterPro IPR005467 Histidine kinase domain
665 730 Pfam PF00512 His Kinase A (phospho-acceptor) domain
665 730 InterPro IPR003661 Signal transduction histidine kinase, dimerisation/phosphoacceptor domain
774 884 SMART SM00387 HKATPase_4
774 884 InterPro IPR003594 Histidine kinase/HSP90-like ATPase
733 883 Gene3D G3DSA:3.30.565.10 -
733 883 InterPro IPR036890 Histidine kinase/HSP90-like ATPase superfamily
529 644 Pfam PF13492 GAF domain
529 644 InterPro IPR003018 GAF domain
401 423 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
420 424 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
396 502 Gene3D G3DSA:1.20.120.620 Backbone structure of the membrane domain of e. Coli histidine kinase receptor kdpd,
396 502 InterPro IPR038318 KdpD, transmembrane domain superfamily
512 657 Gene3D G3DSA:3.30.450.40 -
512 657 InterPro IPR029016 GAF-like domain superfamily
449 471 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
778 883 Pfam PF02518 Histidine kinase-, DNA gyrase B-, and HSP90-like ATPase
778 883 InterPro IPR003594 Histidine kinase/HSP90-like ATPase
425 443 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
397 502 FunFam G3DSA:1.20.120.620:FF:000001 Two-component sensor histidine kinase KdpD
478 500 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
663 730 SMART SM00388 HisKA_10
663 730 InterPro IPR003661 Signal transduction histidine kinase, dimerisation/phosphoacceptor domain
239 372 FunFam G3DSA:3.40.50.620:FF:000169 Two-component system sensor histidine kinase KdbD

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
0.926
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Surrounding area
Pocket 2 P2Rank #2
0.87
Likely same site as FPocket 69 1.5 Å 30 shared residues 100% of smaller site
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Surrounding area
Pocket 3 P2Rank #3
0.602
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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 #69
0.334 Unusual size
Likely same site as P2Rank 2 1.5 Å 30 shared residues 100% of smaller site
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Surrounding area
Pocket 2 FPocket #51
0.289
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Surrounding area
Pocket 3 FPocket #80
0.275 Unusual size
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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_A0A0H3GK10
AlphaFold DB full sequence Viewing
ColabFold KP13_03298
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
ANP PDB via homolog 506.2 Da · LogP -2.06 · TPSA 281.9 Open detail RCSB PDB
EMC PDB via homolog Detail RCSB PDB
EMT PDB via homolog Detail RCSB PDB
RDC PDB via homolog Detail RCSB PDB
ZINC100006925 ZINC proposed compound · Tanimoto 1.000 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
ANP RCSB PDB 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 RCSB PDB Q9X180 229.7 Da LogP 0.97 TPSA 0.0 ✓ Ro5 ✓ Clean CC[Hg+]
EMT RCSB PDB Q9X180 382.8 Da LogP 2.91 TPSA 37.3 ✓ Ro5 ✓ Clean CC[Hg]Sc1ccccc1C(=O)O
RDC RCSB PDB P0DM80 364.8 Da LogP 2.69 TPSA 96.4 ✓ Ro5 ✓ Clean C[C@@H]1C[C@@H]2[C@H](O2)\C=C/C=C/C(=O)Cc3c(c(c…

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.