Protein target profile

VK055_0016

cytosine-specific methyltransferase

Genome: KpATCC43816 Gene: dcm AIK78647.1 3D evidence: AlphaFold DB model + ColabFold model Metabolism 1 reaction UniProt A0A0H3GV12
Length 464
Pocket druggability 0.205
Metabolic reactions 1
Chokepoint No
Direct ligand evidence 0 67 total records
Functional annotation 1 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 (%)
25.967 Lower values reduce human off-target concern.
Human E-value
1.71e-06
Gut microbiome similarity
2.3% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

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

Localization

Localization
Cytoplasmic

Structure confidence

ColabFold pLDDT
92.28 0-100 confidence; >70 supports local structural interpretation.

Binding-site evidence

AlphaFold DB / UniProt model

The selected pocket score is the FPocket value used for ranking after applying the curated structure priority. It estimates small-molecule pocket quality; it is not experimental binding evidence. The 3D viewer may show a different loaded structure, so visible pockets can differ.

FPocket 0.205
Structure A0A0H3GV12
Pocket Pocket 22
P2Rank 0.578
Structure A0A0H3GV12
Pocket Pocket 1
ColabFold model
FPocket 0.605 · Pocket 6
P2Rank 0.613 · Pocket 1
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 107 / 4744 genomes with a hit
Prevalence 2.3%

Cross-references

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

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.

MAEQAGEDAEALLRQLMTIYDVKTLVAELVSVSEQHWSAAILKRVAALGRAAERLRPQEVAHLATLLPSPPAHHPHYGFRFIDLFAGIGGIRSGFEAIGGQCVFTSEWNKHAVRTYKANWYCDPQQHRFNEDIRDITLSQRSDVSDEEAARHIRESIPQHDVLLAGFPCQPFSLAGVSKKNAMGRAHGFACETQGTLFFDVVRIIAARQPAIFVLENVKNLKSHDQGRTFRIIMQTLDELGYEVADAGHTGPDDPKVIDGRHFLPQHRERIVLVGFRRDLQLHAGFTLRDIAAQYPAVRPTFGELLEPTVDAKFILTPVLWKYLYRYARKHQARGNGFGYGLVDPANPHSVARTLSARYYKDGAEILVDRGWDRPLGEMHFDDPLNQQRRPRRLTPRECARLMGFESPQGARFRIPVSDTQAYRQFGNSVVVPVFAAVAKLLAPRIAQAVARREADDNDGGCSR

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

1 EC 6 GO

Enzyme Commission (EC)

1

Gene Ontology (GO)

6
  • GO:0008168 Catalysis of the transfer of a methyl group to an acceptor molecule.
  • GO:0003886 Catalysis of the reaction: a 2'-deoxycytidine in DNA + S-adenosyl-L-methionine = a 5-methyl-2'-deoxycytidine in DNA + H+ + S-adenosyl-L-homocysteine.
  • GO:0003677 Any molecular function by which a gene product interacts selectively and non-covalently with DNA (deoxyribonucleic acid).
  • GO:0009307 A defense process found in many bacteria and archaea that protects the organism from invading foreign DNA by cleaving it with a restriction endonuclease. The organism's own DNA is protected by methylation of a specific nucleotide, which occurs immediately following replication, in the same target site as the restriction enzyme.
  • GO:0032259 The process in which a methyl group is covalently attached to a molecule.
  • GO:0044027 An epigenetic gene regulation mechanism that negatively regulates gene expression by methylation of cytosine residues in chromosomal CpG islands. CpG islands are genomic regions that contain a high frequency of the CG dinucleotide associated with the transcription start site of genes.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

26 records
Show feature table
Start End DB Term Name
7 75 Gene3D G3DSA:1.10.260.140 -
424 442 ProSitePatterns PS00095 C-5 cytosine-specific DNA methylases C-terminal signature.
424 442 InterPro IPR031303 DNA methylase, C-5 cytosine-specific, conserved site
79 443 SUPERFAMILY SSF53335 S-adenosyl-L-methionine-dependent methyltransferases
79 443 InterPro IPR029063 S-adenosyl-L-methionine-dependent methyltransferase superfamily
297 411 Gene3D G3DSA:3.90.120.30 -
263 276 PRINTS PR00105 Cytosine-specific DNA methyltransferase signature
263 276 InterPro IPR001525 C-5 cytosine methyltransferase
80 96 PRINTS PR00105 Cytosine-specific DNA methyltransferase signature
80 96 InterPro IPR001525 C-5 cytosine methyltransferase
209 223 PRINTS PR00105 Cytosine-specific DNA methyltransferase signature
209 223 InterPro IPR001525 C-5 cytosine methyltransferase
11 67 Pfam PF18284 DNA methylase N-terminal domain
11 67 InterPro IPR040743 DNA methylase N-terminal domain
79 429 CDD cd00315 Cyt_C5_DNA_methylase
380 454 PANTHER PTHR10629 CYTOSINE-SPECIFIC METHYLTRANSFERASE
79 440 Pfam PF00145 C-5 cytosine-specific DNA methylase
79 440 InterPro IPR001525 C-5 cytosine methyltransferase
79 449 ProSiteProfiles PS51679 C-5 cytosine-specific DNA methylase (Dnmt) domain profile.
79 449 InterPro IPR001525 C-5 cytosine methyltransferase
81 442 NCBIfam TIGR00675 DNA (cytosine-5-)-methyltransferase
81 442 InterPro IPR001525 C-5 cytosine methyltransferase
161 173 ProSitePatterns PS00094 C-5 cytosine-specific DNA methylases active site.
161 173 InterPro IPR018117 DNA methylase, C-5 cytosine-specific, active site
76 295 Gene3D G3DSA:3.40.50.150 Vaccinia Virus protein VP39
76 295 InterPro IPR029063 S-adenosyl-L-methionine-dependent methyltransferase 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 · FPocket

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

Site 1 FPocket #22
0.205
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Surrounding area

Binding pockets · P2Rank

Probability: high ≥ 0.5 · medium 0.2–0.49 · low < 0.2

Site 1 P2Rank #1
0.578
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Surrounding area
Site 2 P2Rank #2
0.053
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Surrounding area
Site 3 P2Rank #3
0.049
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Surrounding area
Site 4 P2Rank #4
0.045
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Surrounding area
Site 5 P2Rank #5
0.045
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Surrounding area
Residue sets
UniProt: Active site:171-171
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_A0A0H3GV12
AlphaFold DB full sequence Viewing
ColabFold VK055_0016
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.

67 records
Chemistry signal

Structural and bioactivity evidence are both available for this target.

Direct evidence 0 same-protein records
Transferred evidence 17 records from similar proteins
Structural ligands 3 0 loaded crystals
Measured bioactivity 14 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
DCZ PDB via homolog 227.2 Da · LogP -1.53 · TPSA 110.6 Open detail RCSB PDB
SFG PDB via homolog Detail RCSB PDB
X52 PDB via homolog Detail RCSB PDB
AW1 ChEMBL via homolog · pchembl 8.54 (~2.9 nM) Detail ChEMBL
CHEMBL1201129 ChEMBL via homolog · pchembl 7.52 (~30.2 nM) Detail ChEMBL

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
DCZ RCSB PDB P05102 227.2 Da LogP -1.53 TPSA 110.6 ✓ Ro5 ✓ Clean C1[C@@H]([C@H](O[C@H]1N2C=CC(=NC2=O)N)CO)O
SFG RCSB PDB P26358 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)…
X52 RCSB PDB P26358 472.6 Da LogP 2.73 TPSA 113.1 ✓ Ro5 ✓ Clean CCc1c(c(nc(c1C#N)SCc2ccc(cc2)N(C)S(=O)(=O)C)N(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.