KpATCC43816 Protein target profile

putative 2Fe-2S cluster-containing protein

Accession: VK055_1512

Gene: AIK80131.1 3D evidence: AlphaFold DB model + ColabFold model Metabolism Not in network UniProt A0A0H3GV44
Length 369
Pocket druggability (P2Rank · AlphaFold DB model) 0.859
Direct ligand evidence 0 61 total records
Functional annotation 0 EC 5 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 (%)
45.161 Lower values reduce human off-target concern.
Human E-value
1.36e-19
Gut microbiome similarity
2.3% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

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

Structure confidence

ColabFold pLDDT
93.36 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) 0.859
Structure A0A0H3GV44
Pocket Pocket 1
Druggability (FPocket) 0.417
Structure A0A0H3GV44
Pocket Pocket 13
ColabFold model
P2Rank 0.749 · Pocket 1
FPocket 0.807 · Pocket 4
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 107 / 4744 genomes with a hit
Prevalence 2.3%

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.

MVTLSRLFIHPVKSMRGMGLTHAFADISGLAFDRLFMVTETDGTFITARQFPQMVKFIPAPLHDGLHLTAPDGSSAVVRFSDFATQAEPTEVWGNHFTALIAPAAVNQWLSGFFKRDVQLRWLGPQLTRRVKRHDAVPLSFADGYPYLLANEASLRDLQQRCPASVSIEQFRPNLVVTGAAAWDEDSWKVIRIGEVVFDVAKPCSRCIFTTVSPERGQKHPAGEPLETLKRFRTALDNGDVDFGQNLIARNSGVIRVGDEVEILTRGPAKAYGAGESDDTPAPEAQQQATVAIEWQGQQFTGNNQQVLLEQLEQQGIRVPYSCRAGICGSCRIRLEEGEVSPLKKNAVAGDGTILACSCVPKTALRLAP

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

5 GO

Subcellular localization

Localization
Unknown

Gene Ontology (GO)

5
  • GO:0051537 Binding to a 2 iron, 2 sulfur (2Fe-2S) cluster; this cluster consists of two iron atoms, with two inorganic sulfur atoms found between the irons and acting as bridging ligands.
  • 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:0030151 Binding to a molybdenum ion (Mo).
  • GO:0051536 Binding to an iron-sulfur cluster, a combination of iron and sulfur atoms.
  • GO:0030170 Binding to pyridoxal 5' phosphate, 3-hydroxy-5-(hydroxymethyl)-2-methyl4-pyridine carboxaldehyde 5' phosphate, the biologically active form of vitamin B6.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

22 records
Show feature table
Start End DB Term Name
4 132 SUPERFAMILY SSF141673 MOSC N-terminal domain-like
139 262 Pfam PF03473 MOSC domain
139 262 InterPro IPR005302 Molybdenum cofactor sulfurase, C-terminal
296 362 Pfam PF00111 2Fe-2S iron-sulfur cluster binding domain
296 362 InterPro IPR001041 2Fe-2S ferredoxin-type iron-sulfur binding domain
290 367 CDD cd00207 fer2
290 367 InterPro IPR001041 2Fe-2S ferredoxin-type iron-sulfur binding domain
1 116 Pfam PF03476 MOSC N-terminal beta barrel domain
1 116 InterPro IPR005303 Molybdenum cofactor sulfurase, middle domain
280 367 SUPERFAMILY SSF54292 2Fe-2S ferredoxin-like
280 367 InterPro IPR036010 2Fe-2S ferredoxin-like superfamily
115 264 ProSiteProfiles PS51340 MOSC domain profile.
115 264 InterPro IPR005302 Molybdenum cofactor sulfurase, C-terminal
287 369 ProSiteProfiles PS51085 2Fe-2S ferredoxin-type iron-sulfur binding domain profile.
287 369 InterPro IPR001041 2Fe-2S ferredoxin-type iron-sulfur binding domain
323 331 ProSitePatterns PS00197 2Fe-2S ferredoxin-type iron-sulfur binding region signature.
323 331 InterPro IPR006058 2Fe-2S ferredoxin, iron-sulphur binding site
3 264 SUPERFAMILY SSF50800 PK beta-barrel domain-like
3 264 InterPro IPR011037 Pyruvate kinase-like, insert domain superfamily
272 368 Gene3D G3DSA:3.10.20.30 -
272 368 InterPro IPR012675 Beta-grasp domain superfamily
4 263 PANTHER PTHR14237 MOLYBDOPTERIN COFACTOR SULFURASE MOSC

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
0.859
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Surrounding area
Pocket 2 P2Rank #2
0.084
Show in viewer
Surrounding area
Pocket 3 P2Rank #3
0.057
Show in viewer
Surrounding area
Pocket 4 P2Rank #4
0.023
Likely same site as FPocket 13 1.8 Å 6 shared residues 100% of smaller site
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Surrounding area
Pocket 5 P2Rank #5
0.022
Show in viewer
Surrounding area

Binding pockets · FPocket

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

Pocket 1 FPocket #13
0.417
Likely same site as P2Rank 4 1.8 Å 6 shared residues 100% of smaller site
Show in viewer
Surrounding area
Pocket 2 FPocket #2
0.28
Show in viewer
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_A0A0H3GV44
AlphaFold DB full sequence Viewing
ColabFold VK055_1512
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.

61 records
Chemistry signal

Structural ligand evidence is available for this target.

Direct evidence 0 same-protein records
Transferred evidence 11 records from similar proteins
Structural ligands 11 0 loaded crystals
Measured bioactivity 0 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
B3P PDB via homolog 282.3 Da · LogP -4.01 · TPSA 145.4 Open detail RCSB PDB
BCR PDB via homolog Detail RCSB PDB
DGD PDB via homolog Detail RCSB PDB
EFK PDB via homolog Detail RCSB PDB
FES 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
B3P RCSB PDB Q5VT66 282.3 Da LogP -4.01 TPSA 145.4 1 viol. ✓ Clean C(CNC(CO)(CO)CO)CNC(CO)(CO)CO
BCR RCSB PDB P0A3C9 536.9 Da LogP 12.61 TPSA 0.0 2 viol. ✓ Clean CC1=C(C(CCC1)(C)C)\C=C\C(=C\C=C\C(=C\C=C\C=C(/C…
DGD RCSB PDB P0A3C9 949.3 Da LogP 7.61 TPSA 231.1 4 viol. ✓ Clean CCCCCCCCCCCCCCCCCC(=O)OC[C@H](CO[C@H]1[C@@H]([C…
EFK RCSB PDB Q5VT66 128.9 Da LogP -0.68 TPSA 37.3 ✓ Ro5 ✓ Clean O[Mo]=O
FES RCSB PDB A0A067XG75 175.8 Da LogP 1.29 TPSA 0.0 ✓ Ro5 ✓ Clean S1[Fe]S[Fe]1
LHG RCSB PDB P0A3C9 723.0 Da LogP 9.89 TPSA 148.8 2 viol. ✓ Clean CCCCCCCCCCCCCCCC(=O)OC[C@H](CO[P@@](=O)(O)OC[C@…
LMG RCSB PDB P0A3C9 787.2 Da LogP 9.78 TPSA 152.0 2 viol. ✓ Clean CCCCCCCCCCCCCCCCCC(=O)OC[C@H](CO[C@H]1[C@@H]([C…
MOO RCSB PDB Q5VT66 159.9 Da LogP -2.62 TPSA 80.3 ✓ Ro5 ✓ Clean [O-][Mo](=O)(=O)[O-]
MTE RCSB PDB Q5VT66 395.4 Da LogP -0.54 TPSA 171.8 1 viol. ✓ Clean C([C@@H]1C(=C([C@H]2[C@@H](O1)NC3=C(N2)C(=O)NC(…
PQN RCSB PDB P0A3C9 450.7 Da LogP 9.16 TPSA 34.1 1 viol. Alert CC1=C(C(=O)c2ccccc2C1=O)C\C=C(/C)\CCC[C@H](C)CC…
SQD RCSB PDB P0A3C9 795.1 Da LogP 8.12 TPSA 186.1 3 viol. ✓ Clean CCCCCCCCCCCCCCCC(=O)OC[C@H](COC1[C@@H]([C@H]([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.