KpATCC43816 Protein target profile

ATP-dependent protease HslVU, ATPase subunit

Accession: VK055_3251

Gene: AIK81812.1 hslU 3D evidence: AlphaFold DB model + ColabFold model Metabolism Not in network UniProt A0A0H3GK74
Length 444
Pocket druggability (P2Rank · AlphaFold DB model) 0.763
Direct ligand evidence 0 52 total records
Functional annotation 0 EC 6 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
Hit
Human identity (%)
29.389 Lower values reduce human off-target concern.
Human E-value
1.82e-17
Gut microbiome similarity
11.4% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

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

Structure confidence

ColabFold pLDDT
90.64 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) 0.763
Structure A0A0H3GK74
Pocket Pocket 1
Druggability (FPocket) 0.618
Structure A0A0H3GK74
Pocket Pocket 17
ColabFold model
P2Rank 0.741 · Pocket 1
FPocket 0.627 · Pocket 19
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 540 / 4744 genomes with a hit
Prevalence 11.4%

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.

MSEMTPREIVSELDKHIIGQDAAKRSVAIALRNRWRRMQLNEELRHEVTPKNILMIGPTGVGKTEIARRLAKLANAPFIKVEATKFTEVGYVGKEVDSIIRDLTDAAIKMVRMQSIDKNRYRAEELAEERVLDVLIPPAKNNWGQTEPSQEPSAARQAFRKKLREGQLDDKEIEIDLAAAPMGVEIMSPPGMEEMTSQLQSMFQNLGGQKQKPRKLKIKDAMKLLIEEEAAKLVNPEELKQEAIDAVEQHGIVFIDEIDKICKRGGNTSGPDVSREGVQRDLLPLVEGCTVSTKHGMVKTDHILFIASGAFQVASPSDLIPELQGRLPIRVELKALTTHDFERILTEPNASITVQYKALMATEGVNIEFTEDGIKRIAQAAWQVNETTENIGARRLHTVLERLVEDISYDASEMNGQTVTIDAEYVSKHLDVLVADEDLSRFIL

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

6 GO

Subcellular localization

Localization
Cytoplasmic

Gene Ontology (GO)

6
  • GO:0005524 Binding to ATP, adenosine 5'-triphosphate, a universally important coenzyme and enzyme regulator.
  • GO:0016887 Catalysis of the reaction: ATP + H2O = ADP + H+ phosphate. ATP hydrolysis is used in some reactions as an energy source, for example to catalyze a reaction or drive transport against a concentration gradient.
  • GO:0009376 A protein complex that possesses ATP-dependent protease activity; consists of an ATPase large subunit with homology to other ClpX family ATPases and a peptidase small subunit related to the proteasomal beta-subunits of eukaryotes. In the E. coli complex, a double ring-shaped homohexamer of HslV is capped on each side by a ring-shaped HslU homohexamer.
  • GO:0008233 Catalysis of the hydrolysis of a peptide bond. A peptide bond is a covalent bond formed when the carbon atom from the carboxyl group of one amino acid shares electrons with the nitrogen atom from the amino group of a second amino acid.
  • GO:0036402 Catalysis of the reaction: ATP + H2O = ADP + phosphate, which promotes unfolding of protein substrates, and channel opening of the core proteasome.
  • GO:0043335 The process of assisting in the disassembly of non-covalent linkages in a protein or protein aggregate, often where the proteins are in a non-functional or denatured state.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

29 records
Show feature table
Start End DB Term Name
115 184 Gene3D G3DSA:1.10.8.10 -
197 243 FunFam G3DSA:1.10.8.10:FF:000028 ATP-dependent protease ATPase subunit HslU
1 444 Hamap MF_00249 ATP-dependent protease ATPase subunit HslU [hslU].
1 444 InterPro IPR004491 Heat shock protein HslU
3 442 SUPERFAMILY SSF52540 P-loop containing nucleoside triphosphate hydrolases
3 442 InterPro IPR027417 P-loop containing nucleoside triphosphate hydrolase
3 114 Gene3D G3DSA:3.40.50.300 -
3 114 InterPro IPR027417 P-loop containing nucleoside triphosphate hydrolase
193 334 Gene3D G3DSA:3.40.50.300 -
193 334 InterPro IPR027417 P-loop containing nucleoside triphosphate hydrolase
53 136 Pfam PF00004 ATPase family associated with various cellular activities (AAA)
53 136 InterPro IPR003959 ATPase, AAA-type, core
5 333 CDD cd19498 RecA-like_HslU
150 333 FunFam G3DSA:3.40.50.300:FF:000213 ATP-dependent protease ATPase subunit HslU
4 312 PANTHER PTHR48102 ATP-DEPENDENT CLP PROTEASE ATP-BINDING SUBUNIT CLPX-LIKE, MITOCHONDRIAL-RELATED
110 181 FunFam G3DSA:1.10.8.10:FF:000028 ATP-dependent protease ATPase subunit HslU
49 333 SMART SM00382 AAA_5
49 333 InterPro IPR003593 AAA+ ATPase domain
336 441 Gene3D G3DSA:1.10.8.60 -
4 444 NCBIfam TIGR00390 HslU--HslV peptidase ATPase subunit
4 444 InterPro IPR004491 Heat shock protein HslU
1 114 FunFam G3DSA:3.40.50.300:FF:000220 ATP-dependent protease ATPase subunit HslU
336 432 SMART SM01086 ClpB_D2_small_2
336 432 InterPro IPR019489 Clp ATPase, C-terminal
336 441 FunFam G3DSA:1.10.8.60:FF:000027 ATP-dependent protease ATPase subunit HslU
336 406 Pfam PF10431 C-terminal, D2-small domain, of ClpB protein
336 406 InterPro IPR019489 Clp ATPase, C-terminal
188 330 Pfam PF07724 AAA domain (Cdc48 subfamily)
188 330 InterPro IPR003959 ATPase, AAA-type, core

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
0.763
Show in viewer
Surrounding area
Pocket 2 P2Rank #2
0.148
Show in viewer
Surrounding area
Pocket 3 P2Rank #3
0.009
Show in viewer
Surrounding area

Binding pockets · FPocket

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

Pocket 1 FPocket #17
0.618
Show in viewer
Surrounding area
Residue sets
UniProt: Binding site:18-18
UniProt: Binding site:256-256
UniProt: Binding site:322-322
UniProt: Binding site:394-394
UniProt: Binding site:60-65
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_A0A0H3GK74
AlphaFold DB full sequence Viewing
ColabFold VK055_3251
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
AGS PDB via homolog 523.2 Da · LogP -1.51 · TPSA 262.1 Open detail RCSB PDB
ANP PDB via homolog Detail RCSB PDB
ZINC12360002 ZINC proposed compound · Tanimoto 0.810 Detail ZINC
ZINC12360703 ZINC proposed compound · Tanimoto 0.810 Detail ZINC
ZINC12503599 ZINC proposed compound · Tanimoto 0.810 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
AGS RCSB PDB P0A6H1 523.2 Da LogP -1.51 TPSA 262.1 3 viol. ✓ Clean c1nc(c2c(n1)n(cn2)[C@H]3[C@@H]([C@@H]([C@H](O3)…
ANP RCSB PDB P0A6H5 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)…

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.