Protein target profile

VK055_0673

penicillin-binding protein 2

Genome: KpATCC43816 Gene: AIK79296.1 mrdA 3D evidence: AlphaFold DB model + ColabFold model Metabolism 2 reactions UniProt A0A0H3GY10
Length 636
Pocket druggability 0.074
Metabolic reactions 2
Chokepoint No
Direct ligand evidence 0 60 total records
Functional annotation 1 EC 9 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
No hit
Gut microbiome similarity
2.8% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

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

Localization

Localization
CytoplasmicMembrane

Structure confidence

ColabFold pLDDT
90.14 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 0.074
Structure A0A0H3GY10
Pocket Pocket 29
P2Rank 0.525
Structure A0A0H3GY10
Pocket Pocket 1
ColabFold model
FPocket 0.105 · Pocket 42
P2Rank 0.54 · Pocket 1
Core conservation Accessory gene
Roary core
CoreCruncher accessory
Gut microbiome 132 / 4744 genomes with a hit
Prevalence 2.8%

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

Metabolic context: no human homolog detected.

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.

MPLLRDEIRDHSAEEMLFIRRAAIAFLLVVVCFGVLIVNLYHLQVEQHDFYQTRSNQNDIKMLPIAPSRGLIFDRNGIPLVQNITLYRLQVIPSKIPDMAALLQQLTPIVDLTPDDIASFRDDMHHTSRYKAVTLKSDLSDVEVARFAVNEFRFPGVTVESYQQREYPYGAELAHVVGYVSKINDSDLQRLAKNGEEENYAADRNIGKQGIEGYYEKALHGTTGYQEVEVDNHGRVVRLLKEVPPVAGKNLYLTLDLHLQQYIESVLKGQRAAVVVVDPRDGGVLAMVSSPSYDPNPFVKGIGYQAYKSLLENPDRPLINRVTQGLYPPASTVKPYMALSALSAGVITPNTTFFGAPTWTLPGTQRRYRDWLKTGHGMLNVTKAIEESADTFFYQVAFEMGIDRIHEWLSKFGYGQSTGIDLNEEYAGVLPSREWKQRVHKKPWYQGDTISVGIGQGYWIATPIQMVKALTTLLNNGKVQDPHLLYSMKQGNHVERYQQPANLPQVGDPKSPYWGIVRNGMYGMANQPNGTGYKLFHTAPYQIAAKSGTSQVFSLKQNQTYNAKMIPVRLRDHIFYTLFAPYQHPKVAMALILENGGGDGVVAGPTARAILDHIFVPQQASSAAADVPQRDSADAQ

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

1 EC 9 GO

Enzyme Commission (EC)

1

Gene Ontology (GO)

9
  • GO:0008658 Binding to penicillin, an antibiotic that contains the condensed beta-lactamthiazolidine ring system.
  • GO:0016020 A lipid bilayer along with all the proteins and protein complexes embedded in it and attached to it.
  • GO:0009002 Catalysis of the reaction: (Ac)2-L-Lys-D-alanyl-D-alanine + H2O = (Ac)2-L-Lys-D-alanine + D-alanine.
  • GO:0009252 The chemical reactions and pathways resulting in the formation of peptidoglycans, any of a class of glycoconjugates found in bacterial cell walls and consisting of long glycan strands of alternating residues of beta-(1,4) linked N-acetylglucosamine and N-acetylmuramic acid, cross-linked by short peptides.
  • GO:0005886 The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.
  • GO:0071972 Catalysis of the reaction: 2 a peptidoglycan dimer (tetrapeptide) + 3 H2O = a peptidoglycan tetramer with L,D cross-links (L-Lys-D-Asn-L-Lys) + di-trans,poly-cis-undecaprenyl diphosphate + 4 D-alanine.
  • GO:0071555 A process that results in the assembly, arrangement of constituent parts, or disassembly of the cell wall, the rigid or semi-rigid envelope lying outside the cell membrane of plant, fungal and most prokaryotic cells, maintaining their shape and protecting them from osmotic lysis.
  • GO:0006508 The hydrolysis of proteins into smaller polypeptides and/or amino acids by cleavage of their peptide bonds.
  • GO:0008360 Any process that modulates the surface configuration of a cell.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

23 records
Show feature table
Start End DB Term Name
4 619 Hamap MF_02081 Peptidoglycan D,D-transpeptidase MrdA [mrdA].
4 619 InterPro IPR017790 Penicillin-binding protein 2
273 612 Pfam PF00905 Penicillin binding protein transpeptidase domain
273 612 InterPro IPR001460 Penicillin-binding protein, transpeptidase
249 627 Gene3D G3DSA:3.40.710.10 -
249 627 InterPro IPR012338 Beta-lactamase/transpeptidase-like
65 238 Pfam PF03717 Penicillin-binding Protein dimerisation domain
65 238 InterPro IPR005311 Penicillin-binding protein, dimerisation domain
65 248 Gene3D G3DSA:3.90.1310.10 -
17 618 PANTHER PTHR30627 PEPTIDOGLYCAN D,D-TRANSPEPTIDASE
249 623 FunFam G3DSA:3.40.710.10:FF:000004 Peptidoglycan D,D-transpeptidase MrdA
58 254 SUPERFAMILY SSF56519 Penicillin binding protein dimerisation domain
58 254 InterPro IPR036138 Penicillin-binding protein, dimerisation domain superfamily
255 615 SUPERFAMILY SSF56601 beta-lactamase/transpeptidase-like
255 615 InterPro IPR012338 Beta-lactamase/transpeptidase-like
21 43 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
21 43 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
44 636 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
86 161 Gene3D G3DSA:3.30.1390.30 -
1 20 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
155 249 FunFam G3DSA:3.90.1310.10:FF:000001 Peptidoglycan D,D-transpeptidase MrdA
20 615 NCBIfam TIGR03423 penicillin-binding protein 2
20 615 InterPro IPR017790 Penicillin-binding protein 2

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

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

Site 1 P2Rank #1
0.525
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Surrounding area
Site 2 P2Rank #2
0.221
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Surrounding area
Site 3 P2Rank #3
0.086
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Surrounding area
Site 4 P2Rank #4
0.059
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Surrounding area
Site 5 P2Rank #5
0.029
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Surrounding area
Residue sets
UniProt: Active site:316-316 Acyl-ester intermediate
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_A0A0H3GY10
AlphaFold DB full sequence Viewing
ColabFold VK055_0673
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.

60 records
Chemistry signal

Structural and bioactivity evidence are both available for this target.

Direct evidence 0 same-protein records
Transferred evidence 10 records from similar proteins
Structural ligands 4 0 loaded crystals
Measured bioactivity 6 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
ET5 PDB via homolog 334.3 Da · LogP -0.93 · TPSA 168.2 Open detail RCSB PDB
JPP PDB via homolog Detail RCSB PDB
NXL PDB via homolog Detail RCSB PDB
RB6 PDB via homolog Detail RCSB PDB
CHEMBL4560540 ChEMBL via homolog · pchembl 8.00 (~10.0 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
ET5 RCSB PDB P0AD65 334.3 Da LogP -0.93 TPSA 168.2 ✓ Ro5 ✓ Clean c1c(ocn1)C2=C[C@H](N(C[C@@H]2NOS(=O)(=O)O)C(=O)…
JPP RCSB PDB A0A0H3JPA5 519.6 Da LogP -0.29 TPSA 165.2 1 viol. ✓ Clean CCN1CCN(C(=O)C1=O)C(=O)N[C@H](c2ccccc2)C(=O)N[C…
NXL RCSB PDB P0AD65 267.3 Da LogP -2.21 TPSA 139.0 ✓ Ro5 ✓ Clean C1C[C@H](N(C[C@@H]1NOS(=O)(=O)O)C=O)C(=O)N
RB6 RCSB PDB Q47759 536.6 Da LogP -1.50 TPSA 212.2 3 viol. ✓ Clean C1CNC[C@@H]1N2CC=C(C2=O)CC3=C(N[C@H](SC3)[C@@H]…

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.