KpATCC43816 Protein target profile

5-methyltetrahydropteroyltriglutamate-- homocysteine S-methyltransferase

Accession: VK055_3151

Gene: metE AIK81723.1 3D evidence: AlphaFold DB model + ColabFold model Metabolism 2 reactions UniProt A0A0H3GH70
Length 754
Pocket druggability (P2Rank · AlphaFold DB model) 0.961
Metabolic reactions 2
Chokepoint Yes
Direct ligand evidence 0 56 total records
Functional annotation 1 EC 6 GO
Target summary

Strong target candidate with converging metabolic, structural and chemical evidence.

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
No hit
Gut microbiome similarity
3.9% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

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

Structure confidence

ColabFold pLDDT
95.12 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) 0.961
Structure A0A0H3GH70
Pocket Pocket 1
Druggability (FPocket) 0.894
Structure A0A0H3GH70
Pocket Pocket 38
ColabFold model
P2Rank 0.964 · Pocket 1
FPocket 0.991 · Pocket 1
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 185 / 4744 genomes with a hit
Prevalence 3.9%

Metabolic context

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

Explore metabolic network

Attractive metabolic target: catalyzes a consuming chokepoint reaction in Cysteine and methionine metabolism, no isoenzyme backup detected, more central than 90.5% of genes in this genome, no human homolog detected.

Relative network centrality 90.5% more central than 90.5% of genes in this genome
Chokepoint Chokepoint gene
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.

MTIINHTLGFPRVGLRRELKKAQESYWAGNATREELLAVGRELRARHWEQQKQAGVDLLPVGDFAWYDHVLTTSLLLGNVPARHQNKDGSIDIDTLFRIGRGRAPTGEPAAAAEMTKWFNTNYHYMVPEFVKGQQFKLSWTQLLDEVDEALALGHKIKPVLLGPVTYLWLGKVKGEPFDRLTLLNAILPVYQQVLAELAKRGIDWVQIDEPALVLELPPAWLEAFQPAYDALQGQVKLLLTTYFEGVSDNLATIAALPVQGLHVDLVHGKDDVAELHNRLPAGWLLSAGLINGRNVWRADLTEKYAQIKDLVGKRELWVASSCSLLHSPIDLSVETRLDAEVKSWFAFALQKCGELALLRDALNSGDTAAITEWSAPIQARRHSTRVHNAEVEKRLAAITAQDSQRASPYEVRAQAQRQRFNLPKWPTTTIGSFPQTTEIRGLRLDFKKGNLDASHYRTGIAEHIKQAIVEQERLGLDVLVHGEAERNDMVEYFGEHLDGFIFTQNGWVQSYGSRCVKPPVVIGDVSRPQAITVDWAKYAQSLTDKPVKGMLTGPVTILCWSFPREDVSRETIAKQIALALRDEVADLEAAGIGIIQIDEPALREGLPLKRSDWDAYLQWGVEAFRLNAAVAKDDTQIHTHMCYCEFNDIMDSIAALDADVITIETSRSDMELLESFEAFEYPNEIGPGVYDIHSPNVPSVEWIEALLKKAAQRIPVERLWVNPDCGLKTRGWPETRAALANMVQAARNLRQSA

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

1 EC 6 GO

Subcellular localization

Localization
Cytoplasmic

Enzyme Commission (EC)

1

Gene Ontology (GO)

6
  • GO:0003871 Catalysis of the reaction: 5-methyltetrahydropteroyltri-L-glutamate + L-homocysteine = L-methionine + tetrahydropteroyltri-L-glutamate.
  • GO:0008652 The chemical reactions and pathways resulting in the formation of amino acids, organic acids containing one or more amino substituents.
  • GO:0009086 OBSOLETE. The chemical reactions and pathways resulting in the de novo formation of L-methionine (2-amino-4-(methylthio)butanoic acid), a sulfur-containing, essential amino acid found in peptide linkage in proteins.
  • GO:0008270 Binding to a zinc ion (Zn).
  • GO:0071265 The chemical reactions and pathways resulting in the formation of L-methionine, the L-enantiomer of (2S)-2-amino-4-(methylsulfanyl)butanoic acid.
  • GO:0032259 The process in which a methyl group is covalently attached to a molecule.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

24 records
Show feature table
Start End DB Term Name
427 748 CDD cd03311 CIMS_C_terminal_like
427 748 InterPro IPR002629 Cobalamin-independent methionine synthase MetE, C-terminal/archaeal
4 362 CDD cd03312 CIMS_N_terminal_like
5 753 PANTHER PTHR30519 5-METHYLTETRAHYDROPTEROYLTRIGLUTAMATE--HOMOCYSTEINE METHYLTRANSFERASE
7 519 Gene3D G3DSA:3.20.20.210 -
7 519 InterPro IPR038071 UROD/MetE-like superfamily
391 752 SUPERFAMILY SSF51726 UROD/MetE-like
391 752 InterPro IPR038071 UROD/MetE-like superfamily
2 754 PIRSF PIRSF000382 Met_synth_MetE
2 754 InterPro IPR006276 Cobalamin-independent methionine synthase
387 751 FunFam G3DSA:3.20.20.210:FF:000002 5-methyltetrahydropteroyltriglutamate--homocysteine methyltransferase
5 312 Pfam PF08267 Cobalamin-independent synthase, N-terminal domain
5 312 InterPro IPR013215 Cobalamin-independent methionine synthase MetE, N-terminal
7 386 FunFam G3DSA:3.20.20.210:FF:000003 5-methyltetrahydropteroyltriglutamate--homocysteine methyltransferase
426 748 Pfam PF01717 Cobalamin-independent synthase, Catalytic domain
426 748 InterPro IPR002629 Cobalamin-independent methionine synthase MetE, C-terminal/archaeal
5 389 SUPERFAMILY SSF51726 UROD/MetE-like
5 389 InterPro IPR038071 UROD/MetE-like superfamily
384 751 Gene3D G3DSA:3.20.20.210 -
384 751 InterPro IPR038071 UROD/MetE-like superfamily
3 753 Hamap MF_00172 5-methyltetrahydropteroyltriglutamate--homocysteine methyltransferase [metE].
3 753 InterPro IPR006276 Cobalamin-independent methionine synthase
8 752 NCBIfam TIGR01371 5-methyltetrahydropteroyltriglutamate--homocysteine S-methyltransferase
8 752 InterPro IPR006276 Cobalamin-independent methionine synthase

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
0.961
Likely same site as FPocket 38 5.9 Å 21 shared residues 91% of smaller site
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Surrounding area
Pocket 2 P2Rank #2
0.843
Likely same site as FPocket 1 3.8 Å 29 shared residues 94% of smaller site
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Surrounding area
Pocket 3 P2Rank #3
0.563
Likely same site as FPocket 6 2.7 Å 14 shared residues 100% of smaller site
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Surrounding area
Pocket 4 P2Rank #4
0.456
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Surrounding area
Pocket 5 P2Rank #5
0.42
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Surrounding area

Binding pockets · FPocket

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

Pocket 1 FPocket #38
0.894
Likely same site as P2Rank 1 5.9 Å 21 shared residues 91% of smaller site
Show in viewer
Surrounding area
Pocket 2 FPocket #6
0.468
Likely same site as P2Rank 3 2.7 Å 14 shared residues 100% of smaller site
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Surrounding area
Pocket 3 FPocket #1
0.358 Unusual size
Likely same site as P2Rank 2 3.8 Å 29 shared residues 94% of smaller site
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Surrounding area
Residue sets
UniProt: Active site:694-694 Proton donor
UniProt: Binding site:117-117
UniProt: Binding site:122-122
UniProt: Binding site:17-20
UniProt: Binding site:20-20
UniProt: Binding site:431-433
UniProt: Binding site:484-484
UniProt: Binding site:515-516
UniProt: Binding site:561-561
UniProt: Binding site:599-599
UniProt: Binding site:605-605
UniProt: Binding site:641-641
UniProt: Binding site:643-643
UniProt: Binding site:665-665
UniProt: Binding site:726-726
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_A0A0H3GH70
AlphaFold DB full sequence Viewing
ColabFold VK055_3151
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.

56 records
Chemistry signal

Structural ligand evidence is available for this target.

Direct evidence 0 same-protein records
Transferred evidence 6 records from similar proteins
Structural ligands 6 0 loaded crystals
Measured bioactivity 0 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
39S PDB via homolog 703.7 Da · LogP -1.58 · TPSA 344.4 Open detail RCSB PDB
C2F PDB via homolog Detail RCSB PDB
HCS PDB via homolog Detail RCSB PDB
MRY PDB via homolog Detail RCSB PDB
MTX 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
39S RCSB PDB P82610 703.7 Da LogP -1.58 TPSA 344.4 3 viol. ✓ Clean c1cc(ccc1C(=O)N[C@@H](CCC(=O)N[C@@H](CCC(=O)N[C…
C2F RCSB PDB O50008 459.5 Da LogP -0.26 TPSA 202.8 1 viol. ✓ Clean C[N@@]1[C@H](CNC2=C1C(=O)NC(=N2)N)CNc3ccc(cc3)C…
HCS RCSB PDB O50008 135.2 Da LogP -0.28 TPSA 63.3 ✓ Ro5 ✓ Clean C(CS)[C@@H](C(=O)O)N
MRY RCSB PDB Q9X112 122.1 Da LogP -2.31 TPSA 80.9 ✓ Ro5 ✓ Clean C([C@H]([C@H](CO)O)O)O
MTX RCSB PDB P82610 454.4 Da LogP 0.27 TPSA 210.5 ✓ Ro5 ✓ Clean CN(Cc1cnc2c(n1)c(nc(n2)N)N)c3ccc(cc3)C(=O)N[C@@…
THG RCSB PDB O50008 445.4 Da LogP -0.28 TPSA 211.6 1 viol. ✓ Clean c1cc(ccc1C(=O)N[C@@H](CCC(=O)O)C(=O)O)NC[C@H]2C…

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.