Protein target profile

VK055_1043

primary amine oxidase

Genome: KpATCC43816 Gene: maoA AIK79666.1 3D evidence: AlphaFold DB model + ColabFold model Metabolism 8 reactions UniProt A0A0H3GMJ1
Length 755
Pocket druggability 0.985
Metabolic reactions 8
Chokepoint Yes
Direct ligand evidence 0 74 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
Hit
Human identity (%)
28.125 Lower values reduce human off-target concern.
Human E-value
3.1900000000000003e-32
Gut microbiome similarity
0.8% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

Essential (DEG)
N
DEG identity (%)
0.0 Higher values support similarity to known essential genes.

Localization

Localization
Periplasmic

Structure confidence

ColabFold pLDDT
95.39 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 0.985
Structure A0A0H3GMJ1
Pocket Pocket 15
P2Rank 0.565
Structure A0A0H3GMJ1
Pocket Pocket 1
ColabFold model
FPocket 0.875 · Pocket 19
P2Rank 0.671 · Pocket 1
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 38 / 4744 genomes with a hit
Prevalence 0.8%

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

Attractive metabolic target: catalyzes a producing chokepoint reaction in Glycine, serine and threonine metabolism, no isoenzyme backup detected, more central than 93.2% of genes in this genome.

Relative network centrality 93.2% more central than 93.2% of genes in this genome
Chokepoint Chokepoint gene
Catalyzed reactions

8 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.

MANGLKFSPRKTALALAVAVVCAWQSPAFAHGSEAHMVPLDKTLQEFGADVQWDDYAQMFTLIKDGAYVKVKPGAKTAIVNGKSLDLPVPVVMKEGKAWVSDTFINDVFQSGLDQTFQVEKRPHPLNSLSAAEISEAVTIVKAAPEFQPNTRFTEISLHEPDKAAVWAFALQGTPVDAPRTADVVMLDGKHVIEAVVDLQNKKILSWTPIKGAHGMVLLDDFVSVQNIINTSSEFAEVLKKHGITDPGKVVTTPLTVGFFDGKDGLQQDARLLKVVSYLDTGDGNYWAHPIENLVAVVDLEAKKIIKIEEGPVIPVPMEPRPYDGRDRNAPAVKPLDITEPEGKNYTITGDTIHWQNWDFHLRLNSRVGPILSTVTYNDNGTKRQVMYEGSLGGMIVPYGDPDVGWYFKAYLDSGDYGMGTLTSPIVRGKDAPSNAVLLDETIADYTGKPTTIPGAVAIFERYAGPEYKHLEMGKPNVSTERRELVVRWISTVGNYDYIFDWVFHDNGTIGIDAGATGIEAVKGVLAKTMHDPSAKEDTRYGTLIDHNIVGTTHQHIYNFRLDLDVDGENNTLVAMDPEVKPNTAGGPRTSTMQVNQYTIDSEQKAAQKFDPGTIRLLSNTSKENRMGNPVSYQIIPYAGGTHPAATGAKFAPDEWIYHRLSFMDKQLWVTRYHPTERYPEGKYPNRSAHDTGLGQYAKDDESLTNHDDVVWITTGTTHVARAEEWPIMPTEWAHALLKPWNFFDETPTLGEKKK

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:0005507 Binding to a copper (Cu) ion.
  • GO:0008131 Catalysis of the reaction: a primary methyl amine + H2O + O2 = an aldehyde + H2O2 + NH4+.
  • GO:0048038 Binding to a quinone, any member of a class of diketones derivable from aromatic compounds by conversion of two CH groups into CO groups with any necessary rearrangement of double bonds.
  • GO:0009308 The chemical reactions and pathways involving any organic compound that is weakly basic in character and contains an amino or a substituted amino group. Amines are called primary, secondary, or tertiary according to whether one, two, or three carbon atoms are attached to the nitrogen atom.
  • GO:0042597 The region between the inner (cytoplasmic) and outer membrane (Gram-negative Bacteria) or cytoplasmic membrane and cell wall (Fungi and Gram-positive Bacteria).
  • GO:0006584 The chemical reactions and pathways involving any of a group of physiologically important biogenic amines that possess a catechol (3,4-dihydroxyphenyl) nucleus and are derivatives of 3,4-dihydroxyphenylethylamine.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

36 records
Show feature table
Start End DB Term Name
216 317 Pfam PF02728 Copper amine oxidase, N3 domain
216 317 InterPro IPR015802 Copper amine oxidase, N3-terminal
124 209 Pfam PF02727 Copper amine oxidase, N2 domain
124 209 InterPro IPR015800 Copper amine oxidase, N2-terminal
217 322 Gene3D G3DSA:3.10.450.40 -
1 30 SignalP_GRAM_NEGATIVE SignalP-noTM SignalP-noTM
344 751 Gene3D G3DSA:2.70.98.20 Copper amine oxidase, catalytic domain
344 751 InterPro IPR036460 Copper amine oxidase, catalytic domain superfamily
1 30 SignalP_GRAM_POSITIVE SignalP-TM SignalP-TM
1 32 Phobius SIGNAL_PEPTIDE Signal peptide region
337 750 Pfam PF01179 Copper amine oxidase, enzyme domain
337 750 InterPro IPR015798 Copper amine oxidase, catalytic domain
485 498 ProSitePatterns PS01164 Copper amine oxidase topaquinone signature.
485 498 InterPro IPR000269 Copper amine oxidase
107 218 FunFam G3DSA:3.10.450.40:FF:000025 Primary amine oxidase
122 214 SUPERFAMILY SSF54416 Amine oxidase N-terminal region
122 214 InterPro IPR016182 Copper amine oxidase, N-terminal
216 325 SUPERFAMILY SSF54416 Amine oxidase N-terminal region
216 325 InterPro IPR016182 Copper amine oxidase, N-terminal
714 727 ProSitePatterns PS01165 Copper amine oxidase copper-binding site signature.
714 727 InterPro IPR000269 Copper amine oxidase
13 24 Phobius SIGNAL_PEPTIDE_H_REGION Hydrophobic region of a signal peptide.
120 751 PANTHER PTHR10638 COPPER AMINE OXIDASE
120 751 InterPro IPR000269 Copper amine oxidase
33 755 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
25 32 Phobius SIGNAL_PEPTIDE_C_REGION C-terminal region of a signal peptide.
1 12 Phobius SIGNAL_PEPTIDE_N_REGION N-terminal region of a signal peptide.
333 751 SUPERFAMILY SSF49998 Amine oxidase catalytic domain
333 751 InterPro IPR036460 Copper amine oxidase, catalytic domain superfamily
36 114 Gene3D G3DSA:3.30.457.10 -
36 114 InterPro IPR036582 Copper amine oxidase-like, N-terminal domain superfamily
36 110 Pfam PF07833 Copper amine oxidase N-terminal domain
36 110 InterPro IPR012854 Copper amine oxidase-like, N-terminal
116 216 Gene3D G3DSA:3.10.450.40 -
36 115 SUPERFAMILY SSF55383 Copper amine oxidase, domain N
36 115 InterPro IPR036582 Copper amine oxidase-like, N-terminal domain 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 #15
0.985
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Surrounding area
Site 2 FPocket #12
0.46
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Surrounding area
Site 3 FPocket #36
0.31
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Surrounding area
Site 4 FPocket #23
0.23
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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
0.565
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Surrounding area
Site 2 P2Rank #2
0.377
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Surrounding area
Site 3 P2Rank #3
0.317
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Surrounding area
Site 4 P2Rank #4
0.223
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Surrounding area
Site 5 P2Rank #5
0.206
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Surrounding area
Residue sets
UniProt: Active site:413-413 Proton acceptor
UniProt: Active site:496-496 Schiff-base intermediate with substrate; via topaquinone
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_A0A0H3GMJ1
AlphaFold DB full sequence Viewing
ColabFold VK055_1043
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.

74 records
Chemistry signal

Structural and bioactivity evidence are both available for this target.

Direct evidence 0 same-protein records
Transferred evidence 24 records from similar proteins
Structural ligands 15 0 loaded crystals
Measured bioactivity 9 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
ABN PDB via homolog 107.2 Da · LogP 1.15 · TPSA 26.0 Open detail RCSB PDB
E9C PDB via homolog Detail RCSB PDB
FOR PDB via homolog Detail RCSB PDB
HDZ PDB via homolog Detail RCSB PDB
HY1 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
ABN RCSB PDB P12807 107.2 Da LogP 1.15 TPSA 26.0 ✓ Ro5 ✓ Clean c1ccc(cc1)CN
E9C RCSB PDB P46881 211.2 Da LogP -1.17 TPSA 114.5 ✓ Ro5 Alert C1C(=O)C(=CC(=O)C1=O)C[C@@H](C(=O)O)N
FOR RCSB PDB P12807 30.0 Da LogP -0.18 TPSA 17.1 ✓ Ro5 ✓ Clean C=O
HDZ RCSB PDB P46881 28.0 Da LogP 0.03 TPSA 47.6 ✓ Ro5 ✓ Clean N#N
HY1 RCSB PDB P46883 120.2 Da LogP 1.43 TPSA 17.1 ✓ Ro5 ✓ Clean c1ccc(cc1)CC=O
NEH RCSB PDB P12807 45.1 Da LogP -0.03 TPSA 26.0 ✓ Ro5 ✓ Clean CCN
OXY RCSB PDB P46881 32.0 Da LogP 0.07 TPSA 34.1 ✓ Ro5 ✓ Clean O=O
PEA RCSB PDB P46883 122.2 Da LogP 0.47 TPSA 27.6 ✓ Ro5 ✓ Clean c1ccc(cc1)CC[NH3+]
PEL RCSB PDB P46881 122.2 Da LogP 1.22 TPSA 20.2 ✓ Ro5 ✓ Clean c1ccc(cc1)CCO
PEO RCSB PDB P12807 34.0 Da LogP 0.02 TPSA 40.5 ✓ Ro5 ✓ Clean OO
R4A RCSB PDB P46881 805.1 Da LogP 7.65 TPSA 31.9 2 viol. ✓ Clean CN(C)c1cccc(c1)OCCCCC2=CCN3C4=C5C(=CC=CN5[Ru]36…
R5A RCSB PDB P46881 817.1 Da LogP 6.94 TPSA 31.9 2 viol. ✓ Clean CN(C)c1cccc(c1)OCCCCCC2=C3C=CC4=CC=CN5C4=C3N([R…
R7U RCSB PDB P46881 845.2 Da LogP 7.72 TPSA 31.9 2 viol. ✓ Clean CN(C)c1cccc(c1)OCCCCCCCC2=C3C=CC4=CC=CN5C4=C3N(…
R9A RCSB PDB P46881 873.2 Da LogP 8.50 TPSA 31.9 2 viol. ✓ Clean CN(C)c1cccc(c1)OCCCCCCCCCC2=C3C=CC4=CC=CN5C4=C3…
XE RCSB PDB P46883 131.3 Da LogP 0.00 TPSA 0.0 ✓ Ro5 ✓ Clean [Xe]

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.