KpATCC43816 Protein target profile

ribosomal RNA small subunit methyltransferase B

Accession: VK055_3784

Gene: AIK82339.1 sun 3D evidence: AlphaFold DB model + ColabFold model Metabolism 1 reaction UniProt A0A0H3GZ82
Length 431
Pocket druggability (P2Rank · AlphaFold DB model) 0.776
Metabolic reactions 1
Chokepoint No
Direct ligand evidence 0 53 total records
Functional annotation 1 EC 9 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 (%)
34.483 Lower values reduce human off-target concern.
Human E-value
2.49e-23
Gut microbiome similarity
3.0% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

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

Structure confidence

ColabFold pLDDT
96.56 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) 0.776
Structure A0A0H3GZ82
Pocket Pocket 1
Druggability (FPocket) 0.079
Structure A0A0H3GZ82
Pocket Pocket 3
ColabFold model
P2Rank 0.777 · Pocket 1
FPocket 0.135 · Pocket 21
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 144 / 4744 genomes with a hit
Prevalence 3.0%

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 reaction

1 reaction 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.

MKKNINLRSLAAQAIEQVVEKGQSLSNVLPPLQQKVSDKDKALLQELCFGVLRTLSQLEWLISKLMARPMTGKQRTVHFLIMVGLYQLLYTRIPPHAALAETVEGAVAIKRPQLKGLINGVLRQFQRQQEALLAEFAEHENRYLHPKWLLKRLQQAWPEQWQEIVEANNQRPPMWLRVNRNHHSRDEWLALLNETGLEGFTHPDYPDAVRLATPAPVHALPGFDEGWVTVQDASAQGCMRYLQPENGERILDLCAAPGGKTTHILEVAPQSQVMAVDIDEQRLSRVYDNLKRLGVKAEVKQGDGRFPEQWCGNEQFDRILLDAPCSATGVIRRHPDIKWLRRDRDIAELAQLQAEILNAIWGHLKPGGTLVYATCSILPEENSQQIAAFLARTPDAELHATGTPASPGQQNLPGVEEGDGFFYAKLIKRRN

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

1 EC 9 GO

Subcellular localization

Localization
Cytoplasmic

Enzyme Commission (EC)

1

Gene Ontology (GO)

9
  • GO:0008649 Catalysis of the transfer of a methyl group from S-adenosyl-L-methionine to a nucleoside residue in an rRNA molecule. The methyl group can be transfered to the nucleobase or to the ribose group of the nucleoside.
  • GO:0006364 Any process involved in the conversion of a primary ribosomal RNA (rRNA) transcript into one or more mature rRNA molecules.
  • GO:0001510 Posttranscriptional addition of a methyl group to either a nucleotide or 2'-O ribose in a polyribonucleotide. Usually uses S-adenosylmethionine as a cofactor.
  • GO:0006355 Any process that modulates the frequency, rate or extent of cellular DNA-templated transcription.
  • GO:0008168 Catalysis of the transfer of a methyl group to an acceptor molecule.
  • GO:0003723 Binding to an RNA molecule or a portion thereof.
  • GO:0005829 The part of the cytoplasm that does not contain organelles but which does contain other particulate matter, such as protein complexes.
  • GO:0009383 Catalysis of the transfer of a methyl group from S-adenosyl-L-methionine to cytosine to form 5-methylcytosine in small subunit ribosomal RNA.
  • GO:0070475 The addition of a methyl group to an atom in the nucleoside base portion of a nucleotide residue in an rRNA molecule.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

41 records
Show feature table
Start End DB Term Name
234 429 FunFam G3DSA:3.40.50.150:FF:000022 Ribosomal RNA small subunit methyltransferase B
241 426 Pfam PF01189 16S rRNA methyltransferase RsmB/F
241 426 InterPro IPR001678 SAM-dependent methyltransferase RsmB/NOP2-type
122 142 Coils Coil Coil
173 230 FunFam G3DSA:3.30.70.1170:FF:000002 Ribosomal RNA small subunit methyltransferase B
1 429 Hamap MF_01856 Ribosomal RNA small subunit methyltransferase B [rsmB].
1 429 InterPro IPR023541 rRNA small subunit methyltransferase B, enterobacteriaceae
231 429 Gene3D G3DSA:3.40.50.150 Vaccinia Virus protein VP39
231 429 InterPro IPR029063 S-adenosyl-L-methionine-dependent methyltransferase superfamily
367 383 PRINTS PR02008 RNA (C5-cytosine) methyltransferase signature
367 383 InterPro IPR023267 RNA (C5-cytosine) methyltransferase
317 329 PRINTS PR02008 RNA (C5-cytosine) methyltransferase signature
317 329 InterPro IPR023267 RNA (C5-cytosine) methyltransferase
222 236 PRINTS PR02008 RNA (C5-cytosine) methyltransferase signature
222 236 InterPro IPR023267 RNA (C5-cytosine) methyltransferase
251 261 PRINTS PR02008 RNA (C5-cytosine) methyltransferase signature
251 261 InterPro IPR023267 RNA (C5-cytosine) methyltransferase
411 428 PRINTS PR02008 RNA (C5-cytosine) methyltransferase signature
411 428 InterPro IPR023267 RNA (C5-cytosine) methyltransferase
146 172 Gene3D G3DSA:1.10.287.730 Helix hairpin bin
141 429 SUPERFAMILY SSF53335 S-adenosyl-L-methionine-dependent methyltransferases
141 429 InterPro IPR029063 S-adenosyl-L-methionine-dependent methyltransferase superfamily
5 129 CDD cd00620 Methyltransferase_Sun
117 431 PANTHER PTHR22807 NOP2 YEAST -RELATED NOL1/NOP2/FMU SUN DOMAIN-CONTAINING
117 431 InterPro IPR023267 RNA (C5-cytosine) methyltransferase
249 372 CDD cd02440 AdoMet_MTases
173 230 Gene3D G3DSA:3.30.70.1170 Sun protein; domain 3
8 429 NCBIfam TIGR00563 16S rRNA (cytosine(967)-C(5))-methyltransferase RsmB
8 429 InterPro IPR004573 rRNA small subunit methyltransferase B
164 429 ProSiteProfiles PS51686 SAM-dependent MTase RsmB/NOP-type domain profile.
164 429 InterPro IPR001678 SAM-dependent methyltransferase RsmB/NOP2-type
146 172 FunFam G3DSA:1.10.287.730:FF:000001 Ribosomal RNA small subunit methyltransferase B
6 149 SUPERFAMILY SSF48013 NusB-like
6 149 InterPro IPR035926 NusB-like superfamily
1 145 FunFam G3DSA:1.10.940.10:FF:000002 Ribosomal RNA small subunit methyltransferase B
7 127 Pfam PF01029 NusB family
7 127 InterPro IPR006027 NusB/RsmB/TIM44
316 327 ProSitePatterns PS01153 NOL1/NOP2/sun family signature.
316 327 InterPro IPR018314 Bacterial Fmu (Sun)/eukaryotic nucleolar NOL1/Nop2p, conserved site
1 145 Gene3D G3DSA:1.10.940.10 -
1 145 InterPro IPR035926 NusB-like 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
0.776
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Surrounding area
Pocket 2 P2Rank #2
0.077
Show in viewer
Surrounding area
Pocket 3 P2Rank #3
0.051
Show in viewer
Surrounding area
Pocket 4 P2Rank #4
0.003
Show in viewer
Surrounding area
Residue sets
UniProt: Active site:375-375 Nucleophile
UniProt: Binding site:254-260
UniProt: Binding site:277-277
UniProt: Binding site:303-303
UniProt: Binding site:322-322
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_A0A0H3GZ82
AlphaFold DB full sequence Viewing
ColabFold VK055_3784
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.

53 records
Chemistry signal

Structural and bioactivity evidence are both available for this target.

Direct evidence 0 same-protein records
Transferred evidence 3 records from similar proteins
Structural ligands 1 0 loaded crystals
Measured bioactivity 2 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
SFG PDB via homolog 381.4 Da · LogP -2.06 · TPSA 208.7 Open detail RCSB PDB
DXH ChEMBL via homolog · pchembl 9.69 (~0.2 nM) Detail ChEMBL
DWT ChEMBL via homolog · pchembl 6.44 (~363.1 nM) Detail ChEMBL
ZINC13650200 ZINC proposed compound · Tanimoto 1.000 Detail ZINC
ZINC205994753 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
SFG RCSB PDB O57712 381.4 Da LogP -2.06 TPSA 208.7 2 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.