KpATCC43816 Protein target profile

ribosomal-protein-alanine acetyltransferase

Accession: VK055_2602

Gene: AIK81199.1 rimI 3D evidence: AlphaFold DB model + ColabFold model Metabolism 2 reactions UniProt A0A0H3GHX5
Length 148
Pocket druggability (P2Rank · AlphaFold DB model) 0.852
Metabolic reactions 2
Chokepoint No
Direct ligand evidence 0 66 total records
Functional annotation 1 EC 5 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
Hit
Human identity (%)
38.596 Lower values reduce human off-target concern.
Human E-value
3.53e-07
Gut microbiome similarity
2.5% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

Essential (DEG)
Y
DEG identity (%)
84.459 Higher values support similarity to known essential genes.
DEG E-value
2.36e-92 Smaller values mean stronger essential-gene similarity.

Structure confidence

ColabFold pLDDT
97.31 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) 0.852
Structure A0A0H3GHX5
Pocket Pocket 1
Druggability (FPocket) 0.405
Structure A0A0H3GHX5
Pocket Pocket 3
ColabFold model
P2Rank 0.897 · Pocket 1
FPocket 0.411 · Pocket 5
Core conservation Accessory gene
Roary core
CoreCruncher accessory
Gut microbiome 120 / 4744 genomes with a hit
Prevalence 2.5%

Metabolic context

Reactions catalyzed, pathway membership, and centrality in the genome-scale metabolic network.

Explore metabolic network
Relative network centrality 0.0% more central than 0.0% of genes in this genome
Chokepoint Not a chokepoint
Pathways

No specific KEGG pathway assigned - this reaction either has no KEGG mapping, or only matches a generic overview map with no route-level information.

Catalyzed reactions

2 reactions mapped to this gene in the metabolic model. Open the full network to see each one, with substrates/products and the reaction-reaction map.

Imported from KpATCC43816.sbml · 2026-07-09

Sequence

Primary amino-acid sequence viewer.

MNTISTLSTADLTKAWHIEKRAHAFPWSEQTLASNQGERYRNYQLSVDGEMAAFAITQVVLDEATLFNIAVDPAYQRRGLGRALLEHVIDEVEKLGVVTLWLEVRASNVAAIALYESVGFNEATIRRNYYPTTDGREDAIIMALPISM

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

1 EC 5 GO

Subcellular localization

Localization
Cytoplasmic

Enzyme Commission (EC)

1

Gene Ontology (GO)

5
  • GO:0016747 Catalysis of the transfer of an acyl group, other than amino-acyl, from one compound (donor) to another (acceptor).
  • GO:0006474 The acetylation of the N-terminal amino acid of proteins.
  • GO:0008080 Catalysis of the transfer of an acetyl group to a nitrogen atom on the acceptor molecule.
  • GO:0005737 The contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
  • GO:0008999 Catalysis of the reaction: acetyl-CoA + N-terminal L-alanyl-[protein] = CoA + H+ + N-terminal N(alpha)-acetyl-L-alanyl-[protein].

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

14 records
Show feature table
Start End DB Term Name
2 147 ProSiteProfiles PS51186 Gcn5-related N-acetyltransferase (GNAT) domain profile.
2 147 InterPro IPR000182 GNAT domain
48 103 CDD cd04301 NAT_SF
11 142 NCBIfam TIGR01575 ribosomal protein S18-alanine N-acetyltransferase
11 142 InterPro IPR006464 N-acetyltransferase RimI/Ard1
1 148 Gene3D G3DSA:3.40.630.30 -
17 120 Pfam PF00583 Acetyltransferase (GNAT) family
17 120 InterPro IPR000182 GNAT domain
33 143 PANTHER PTHR43420 ACETYLTRANSFERASE
3 146 SUPERFAMILY SSF55729 Acyl-CoA N-acyltransferases (Nat)
3 146 InterPro IPR016181 Acyl-CoA N-acyltransferase
4 146 Hamap MF_02210 [Ribosomal protein S18]-alanine N-acetyltransferase [rimI].
4 146 InterPro IPR043690 N-acetyltransferase RimI
1 148 FunFam G3DSA:3.40.630.30:FF:000018 [Ribosomal protein S18]-alanine N-acetyltransferase

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.

Download VMD script Full viewer

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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
0.852
Likely same site as FPocket 3 0.7 Å 29 shared residues 94% of smaller site
Show in viewer
Surrounding area

Binding pockets · FPocket

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

Pocket 1 FPocket #3
0.405 Unusual size
Likely same site as P2Rank 1 0.7 Å 29 shared residues 94% of smaller site
Show in viewer
Surrounding area
Residue sets
UniProt: Active site:103-103 Proton acceptor
UniProt: Active site:115-115 Proton donor
UniProt: Binding site:108-108
UniProt: Binding site:69-71
UniProt: Binding site:77-82
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_A0A0H3GHX5
AlphaFold DB full sequence Viewing
ColabFold VK055_2602
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.

66 records
Chemistry signal

Structural and bioactivity evidence are both available for this target.

Direct evidence 0 same-protein records
Transferred evidence 16 records from similar proteins
Structural ligands 6 0 loaded crystals
Measured bioactivity 10 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
CMC PDB via homolog 825.6 Da · LogP -1.78 · TPSA 383.9 Open detail RCSB PDB
TAR PDB via homolog Detail RCSB PDB
U2J PDB via homolog Detail RCSB PDB
U3V PDB via homolog Detail RCSB PDB
U3Y 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
CMC RCSB PDB Q9LFM3 825.6 Da LogP -1.78 TPSA 383.9 3 viol. ✓ Clean CC(C)(CO[P@](=O)(O)O[P@@](=O)(O)OC[C@@H]1[C@H](…
TAR RCSB PDB Q08414 150.1 Da LogP -2.12 TPSA 115.1 ✓ Ro5 ✓ Clean [C@H]([C@@H](C(=O)O)O)(C(=O)O)O
U2J RCSB PDB Q9GZZ1 552.6 Da LogP -0.30 TPSA 195.3 1 viol. ✓ Clean CNC(=O)c1csc(n1)[C@@H]2C[C@@H](CN2C(=O)c3ccc(cc…
U3V RCSB PDB Q9GZZ1 474.6 Da LogP 0.86 TPSA 125.4 ✓ Ro5 ✓ Clean CC(C)(C)c1cc(n(n1)C)C(=O)N2CCC(CC2)C[C@@H](C(=O…
U3Y RCSB PDB Q9GZZ1 552.6 Da LogP -0.30 TPSA 195.3 1 viol. ✓ Clean CNC(=O)c1csc(n1)[C@H]2C[C@@H](CN2C(=O)c3ccc(cc3…
U44 RCSB PDB Q9GZZ1 262.4 Da LogP -0.05 TPSA 78.4 ✓ Ro5 ✓ Clean CC(C)(C)[C@H](C(=O)NCCC(=O)NCCS)O

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.