KpATCC43816 Protein target profile

response regulator

Accession: VK055_1123

Gene: AIK79746.1 3D evidence: AlphaFold DB model + ColabFold model Metabolism Not in network UniProt A0A485FNM7
Length 897
Pocket druggability (P2Rank · AlphaFold DB model) 0.92
Direct ligand evidence 0 54 total records
Functional annotation 1 EC 8 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
0.4% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

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

Structure confidence

ColabFold pLDDT
81.62 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) 0.92
Structure A0A485FNM7
Pocket Pocket 1
Druggability (FPocket) 0.75
Structure A0A485FNM7
Pocket Pocket 1
ColabFold model
P2Rank 0.942 · Pocket 1
FPocket 0.932 · Pocket 5
Core conservation Accessory gene
Roary accessory
CoreCruncher accessory
Gut microbiome 19 / 4744 genomes with a hit
Prevalence 0.4%

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.

MHAANRADLNLLPSAVMIYDERERLQAWNDKVALFYPTIAPWLAVGATLESLAEKFIDAGYNIDPGRQQTLREAIIRNCRQTNHCEVRQSGNRRIYVQHQQLADGGIVSLHTDITELDEARRSRHQLHDDFLFTAESIQIGIWDWQVSHDNLQVNDTLLAMVGQSRAQWRYPLRFMLNLVHEDDRATLQQAMIASQNEHMPVFECELRVQHPTQGWRWMLLSGQIVTLNMQQQAERVIGTLQDITRRKAAELLAIEAAKEAREANEAKSAFLANMSHEIRTPMNGILGMTQLCLDTPLTAEQREYLSLVMSSAQSLLHIINDILDFSRIESGKMQVDEEPLEIRPFIQSLIRPHMPAASEKGIELLVDISPAVPEVLIVDGPRLRQILTNLLGNALKFTHQGEVLLAIAPADDESRWRFRIRDTGIGIAPEKQKAIFEAFSQADSSTTRRYGGTGLGLTISARLVSLMGGELTVESQPGAGSEFAFTLPLEGLHAAVSGSAPPGRFNNQRVLVVDDNSTNLRLLDTMLRQMGLIPICVDNASEALRRAAEGPPWPLILLDAQMPDMDGVSLALELSALPEARQSQIIMLSSMSRHFDANMLKRIGIAHYLHKPVAQRELHQVIAGILLPTPVVATAPAPVAEPVRDQTGLHILLAEDNLVNQKVARRLLEQLGHRCEVVSNGREALERWRAACWDLLLIDLQMPEMDGETAIRLLREETPALGRQHQPAMAMTAHAMQGDRERCLAMGFDGYIAKPVSLEALREAIARVGAAEDSGLEEEKGLPDEAHLLKQCADDPELVEELLGLFAEGLDAATSALTHAIDANDRETLRRTAHKLRGEAVTLGFQRLAGVLQQLESQATSPDRTVPDDLRDALAEATTGCHRWLHRRSQEVPRAP

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

1 EC 8 GO

Subcellular localization

Localization
CytoplasmicMembrane

Enzyme Commission (EC)

1

Gene Ontology (GO)

8
  • GO:0016772 Catalysis of the transfer of a phosphorus-containing group from one compound (donor) to another (acceptor).
  • GO:0005515 Binding to a protein.
  • 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: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: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: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.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

69 records
Show feature table
Start End DB Term Name
796 889 ProSiteProfiles PS50894 Histidine-containing phosphotransfer (HPt) domain profile.
796 889 InterPro IPR008207 Signal transduction histidine kinase, phosphotransfer (Hpt) domain
384 490 CDD cd16922 HATPase_EvgS-ArcB-TorS-like
802 877 Pfam PF01627 Hpt domain
802 877 InterPro IPR008207 Signal transduction histidine kinase, phosphotransfer (Hpt) domain
508 643 Gene3D G3DSA:3.40.50.2300 -
644 772 Gene3D G3DSA:3.40.50.2300 -
651 770 ProSiteProfiles PS50110 Response regulatory domain profile.
651 770 InterPro IPR001789 Signal transduction response regulator, receiver domain
648 769 SUPERFAMILY SSF52172 CheY-like
648 769 InterPro IPR011006 CheY-like superfamily
274 492 ProSiteProfiles PS50109 Histidine kinase domain profile.
274 492 InterPro IPR005467 Histidine kinase domain
379 492 SMART SM00387 HKATPase_4
379 492 InterPro IPR003594 Histidine kinase/HSP90-like ATPase
9 120 Pfam PF12860 PAS fold
267 332 SMART SM00388 HisKA_10
267 332 InterPro IPR003661 Signal transduction histidine kinase, dimerisation/phosphoacceptor domain
145 244 CDD cd00130 PAS
145 244 InterPro IPR000014 PAS domain
800 887 CDD cd00088 HPT
800 887 InterPro IPR008207 Signal transduction histidine kinase, phosphotransfer (Hpt) domain
255 333 Gene3D G3DSA:1.10.287.130 -
652 766 CDD cd17546 REC_hyHK_CKI1_RcsC-like
476 489 PRINTS PR00344 Bacterial sensor protein C-terminal signature
476 489 InterPro IPR004358 Signal transduction histidine kinase-related protein, C-terminal
435 445 PRINTS PR00344 Bacterial sensor protein C-terminal signature
435 445 InterPro IPR004358 Signal transduction histidine kinase-related protein, C-terminal
452 470 PRINTS PR00344 Bacterial sensor protein C-terminal signature
452 470 InterPro IPR004358 Signal transduction histidine kinase-related protein, C-terminal
417 431 PRINTS PR00344 Bacterial sensor protein C-terminal signature
417 431 InterPro IPR004358 Signal transduction histidine kinase-related protein, C-terminal
265 328 CDD cd00082 HisKA
265 328 InterPro IPR003661 Signal transduction histidine kinase, dimerisation/phosphoacceptor domain
334 493 Gene3D G3DSA:3.30.565.10 -
334 493 InterPro IPR036890 Histidine kinase/HSP90-like ATPase superfamily
510 627 ProSiteProfiles PS50110 Response regulatory domain profile.
510 627 InterPro IPR001789 Signal transduction response regulator, receiver domain
331 493 FunFam G3DSA:3.30.565.10:FF:000078 Two-component sensor histidine kinase
380 491 Pfam PF02518 Histidine kinase-, DNA gyrase B-, and HSP90-like ATPase
380 491 InterPro IPR003594 Histidine kinase/HSP90-like ATPase
505 626 SUPERFAMILY SSF52172 CheY-like
505 626 InterPro IPR011006 CheY-like superfamily
254 333 FunFam G3DSA:1.10.287.130:FF:000002 Two-component osmosensing histidine kinase
783 888 Gene3D G3DSA:1.20.120.160 HPT domain
783 888 InterPro IPR036641 HPT domain superfamily
509 623 SMART SM00448 REC_2
509 623 InterPro IPR001789 Signal transduction response regulator, receiver domain
650 766 SMART SM00448 REC_2
650 766 InterPro IPR001789 Signal transduction response regulator, receiver domain
152 240 Pfam PF08447 PAS fold
152 240 InterPro IPR013655 PAS fold-3
139 251 Gene3D G3DSA:3.30.450.20 PAS domain
255 334 SUPERFAMILY SSF47384 Homodimeric domain of signal transducing histidine kinase
255 334 InterPro IPR036097 Signal transduction histidine kinase, dimerisation/phosphoacceptor domain superfamily
652 766 Pfam PF00072 Response regulator receiver domain
652 766 InterPro IPR001789 Signal transduction response regulator, receiver domain
511 623 Pfam PF00072 Response regulator receiver domain
511 623 InterPro IPR001789 Signal transduction response regulator, receiver domain
749 876 SUPERFAMILY SSF47226 Histidine-containing phosphotransfer domain, HPT domain
749 876 InterPro IPR036641 HPT domain superfamily
204 247 SMART SM00086 pac_2
204 247 InterPro IPR001610 PAC motif
321 490 SUPERFAMILY SSF55874 ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase
321 490 InterPro IPR036890 Histidine kinase/HSP90-like ATPase superfamily
220 774 PANTHER PTHR45339 HYBRID SIGNAL TRANSDUCTION HISTIDINE KINASE J
267 332 Pfam PF00512 His Kinase A (phospho-acceptor) domain
136 250 SUPERFAMILY SSF55785 PYP-like sensor domain (PAS domain)
136 250 InterPro IPR035965 PAS domain superfamily

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
0.92
Likely same site as FPocket 39 2.3 Å 27 shared residues 96% of smaller site
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Surrounding area
Pocket 2 P2Rank #2
0.715
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Surrounding area
Pocket 3 P2Rank #3
0.346
Likely same site as FPocket 1 3.3 Å 11 shared residues 100% of smaller site
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Surrounding area
Pocket 4 P2Rank #4
0.256
Likely same site as FPocket 65 7.8 Å 9 shared residues 69% of smaller site
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Surrounding area
Pocket 5 P2Rank #5
0.061
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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
0.75
Likely same site as P2Rank 3 3.3 Å 11 shared residues 100% of smaller site
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Surrounding area
Pocket 2 FPocket #39
0.745 Unusual size
Likely same site as P2Rank 1 2.3 Å 27 shared residues 96% of smaller site
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Surrounding area
Pocket 3 FPocket #65
0.394 Unusual size
Likely same site as P2Rank 4 7.8 Å 9 shared residues 69% of smaller site
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Surrounding area
Pocket 4 FPocket #56
0.252
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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_A0A485FNM7
AlphaFold DB full sequence Viewing
ColabFold VK055_1123
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
BEF PDB via homolog Detail RCSB PDB
BTB PDB via homolog Detail RCSB PDB
PG0 PDB via homolog Detail RCSB PDB
ZINC1580161 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 Q9ABT2 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)…
BEF RCSB PDB O22267 66.0 Da LogP 0.88 TPSA 0.0 ✓ Ro5 ✓ Clean [Be-](F)(F)F
BTB RCSB PDB P0AEC6 209.2 Da LogP -3.01 TPSA 104.4 ✓ Ro5 ✓ Clean C(CO)N(CCO)C(CO)(CO)CO
PG0 RCSB PDB 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.

Cross-references

External database identifiers for this protein, its structures, ligands, and metabolic reactions.