KpATCC43816 Protein target profile

arginine decarboxylase

Accession: VK055_4106

Gene: speA AIK82652.1 3D evidence: AlphaFold DB model + ColabFold model Metabolism 2 reactions UniProt A0A0H3GT44
Length 632
Pocket druggability (P2Rank · AlphaFold DB model) 0.886
Metabolic reactions 2
Chokepoint No
Direct ligand evidence 0 54 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
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 (%)
44.462 Higher values support similarity to known essential genes.
DEG E-value
0.0 Smaller values mean stronger essential-gene similarity.

Structure confidence

ColabFold pLDDT
92.61 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) 0.886
Structure A0A0H3GT44
Pocket Pocket 1
Druggability (FPocket) 0.639
Structure A0A0H3GT44
Pocket Pocket 9
ColabFold model
P2Rank 0.859 · Pocket 1
FPocket 0.757 · Pocket 2
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 132 / 4744 genomes with a hit
Prevalence 2.8%

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.

MSSQEASKMLRTYNIAWWGNNYYDVNELGHISVCPDPDVPEARVDLAELVKAREAQGQRLPALFCFPQILQHRLRSINAAFKRARESYGYNGDYFLVYPIKVNQHRRVIESLIHSGEPLGLEAGSKAELMAVLAHAGMTRSVIVCNGYKDREYIRLALVGEKMGHKVYLVIEKMSEIAIVLEEAERLNVVPRLGVRARLASQGSGKWQSSGGEKSKFGLAATQVLQLVEILREAGHLESLQLLHFHLGSQMANIRDIATGVRESARFYVELHKLGVNIQCFDVGGGLGVDYEGTRSQSDCSVNYGLNEYANNIIWAIGDACEENGLPHPTVITESGRAVTAHHTVLVSNIIGVERNEYTEATPPAEDAARPLQSMWETWLEMHETGNRRSLREWLHDSQMDLHDIHIGYSSGTFNLQERAWAEQLYLNMCHEVQKQLDPSNRAHRPIIDELQERMADKIYVNFSLFQSMPDAWGIDQLFPVMPLEGLNKSPERRAVLLDITCDSDGAIDHYVDGDGIATTMPMPEYDPENPPMLGFFMVGAYQEILGNMHNLFGDTEAVDVFVFPDGSVEVELSDEGDTVADMLQYVQLDPNTLLTQFRDQVKNTGLDDALQQQFLEEFEAGLYGYTYLEDE

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

1 EC 6 GO

Subcellular localization

Localization
Periplasmic

Enzyme Commission (EC)

1

Gene Ontology (GO)

6
  • GO:0008295 The chemical reactions and pathways resulting in the formation of spermidine, N-(3-aminopropyl)-1,4-diaminobutane.
  • GO:0003824 Catalysis of a biochemical reaction at physiological temperatures. In biologically catalyzed reactions, the reactants are known as substrates, and the catalysts are naturally occurring macromolecular substances known as enzymes. Enzymes possess specific binding sites for substrates, and are usually composed wholly or largely of protein, but RNA that has catalytic activity (ribozyme) is often also regarded as enzymatic.
  • GO:0008792 Catalysis of the reaction: L-arginine + H+ = agmatine + CO2.
  • GO:0006527 The chemical reactions and pathways resulting in the breakdown of L-arginine.
  • GO:0046872 Binding to a metal ion.
  • GO:0033388 The chemical reactions and pathways resulting in the formation of putrescine, 1,4-diaminobutane, from other compounds, including arginine.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

62 records
Show feature table
Start End DB Term Name
74 341 Pfam PF02784 Pyridoxal-dependent decarboxylase, pyridoxal binding domain
74 341 InterPro IPR022644 Orn/DAP/Arg decarboxylase 2, N-terminal
455 558 SUPERFAMILY SSF50621 Alanine racemase C-terminal domain-like
455 558 InterPro IPR009006 Alanine racemase/group IV decarboxylase, C-terminal
4 631 PANTHER PTHR43295 ARGININE DECARBOXYLASE
4 631 InterPro IPR002985 Arginine decarboxylase
579 632 FunFam G3DSA:1.10.287.3440:FF:000001 Biosynthetic arginine decarboxylase
487 512 PRINTS PR01180 Arginine decarboxylase signature
487 512 InterPro IPR002985 Arginine decarboxylase
90 104 PRINTS PR01180 Arginine decarboxylase signature
90 104 InterPro IPR002985 Arginine decarboxylase
194 216 PRINTS PR01180 Arginine decarboxylase signature
194 216 InterPro IPR002985 Arginine decarboxylase
321 338 PRINTS PR01180 Arginine decarboxylase signature
321 338 InterPro IPR002985 Arginine decarboxylase
170 191 PRINTS PR01180 Arginine decarboxylase signature
170 191 InterPro IPR002985 Arginine decarboxylase
462 483 PRINTS PR01180 Arginine decarboxylase signature
462 483 InterPro IPR002985 Arginine decarboxylase
144 159 PRINTS PR01180 Arginine decarboxylase signature
144 159 InterPro IPR002985 Arginine decarboxylase
540 561 PRINTS PR01180 Arginine decarboxylase signature
540 561 InterPro IPR002985 Arginine decarboxylase
66 81 PRINTS PR01180 Arginine decarboxylase signature
66 81 InterPro IPR002985 Arginine decarboxylase
66 343 SUPERFAMILY SSF51419 PLP-binding barrel
66 343 InterPro IPR029066 PLP-binding barrel
56 561 CDD cd06830 PLPDE_III_ADC
56 561 InterPro IPR002985 Arginine decarboxylase
446 566 FunFam G3DSA:2.40.37.10:FF:000001 Biosynthetic arginine decarboxylase
360 455 FunFam G3DSA:1.20.58.930:FF:000001 Biosynthetic arginine decarboxylase
98 116 PRINTS PR01179 Ornithine/diaminopimelate/arginine (ODA) decarboxylase family signature
98 116 InterPro IPR000183 Ornithine/DAP/Arg decarboxylase
331 350 PRINTS PR01179 Ornithine/diaminopimelate/arginine (ODA) decarboxylase family signature
331 350 InterPro IPR000183 Ornithine/DAP/Arg decarboxylase
120 132 PRINTS PR01179 Ornithine/diaminopimelate/arginine (ODA) decarboxylase family signature
120 132 InterPro IPR000183 Ornithine/DAP/Arg decarboxylase
540 553 PRINTS PR01179 Ornithine/diaminopimelate/arginine (ODA) decarboxylase family signature
540 553 InterPro IPR000183 Ornithine/DAP/Arg decarboxylase
237 250 PRINTS PR01179 Ornithine/diaminopimelate/arginine (ODA) decarboxylase family signature
237 250 InterPro IPR000183 Ornithine/DAP/Arg decarboxylase
67 343 FunFam G3DSA:3.20.20.10:FF:000001 Biosynthetic arginine decarboxylase
67 343 Gene3D G3DSA:3.20.20.10 Alanine racemase
67 343 InterPro IPR029066 PLP-binding barrel
360 455 Gene3D G3DSA:1.20.58.930 -
5 630 NCBIfam TIGR01273 arginine decarboxylase
5 630 InterPro IPR002985 Arginine decarboxylase
13 566 Gene3D G3DSA:2.40.37.10 Lyase, Ornithine Decarboxylase; Chain A, domain 1
13 566 InterPro IPR009006 Alanine racemase/group IV decarboxylase, C-terminal
1 632 PIRSF PIRSF001336 ARGDC
1 632 InterPro IPR002985 Arginine decarboxylase
580 629 Pfam PF17944 Arginine decarboxylase C-terminal helical extension
580 629 InterPro IPR041128 Arginine decarboxylase, C-terminal helical
2 631 Hamap MF_01417 Biosynthetic arginine decarboxylase [speA].
2 631 InterPro IPR002985 Arginine decarboxylase
275 288 ProSitePatterns PS00879 Orn/DAP/Arg decarboxylases family 2 signature 2.
275 288 InterPro IPR022657 Orn/DAP/Arg decarboxylase 2, conserved site
579 632 Gene3D G3DSA:1.10.287.3440 -
366 452 Pfam PF17810 Arginine decarboxylase helical bundle domain
366 452 InterPro IPR040634 Arginine decarboxylase, helical bundle domain
98 116 ProSitePatterns PS00878 Orn/DAP/Arg decarboxylases family 2 pyridoxal-P attachment site.
98 116 InterPro IPR022653 Orn/DAP/Arg decarboxylase 2, pyridoxal-phosphate binding site

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
0.886
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Surrounding area
Pocket 2 P2Rank #2
0.547
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Surrounding area
Pocket 3 P2Rank #3
0.063
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Surrounding area
Pocket 4 P2Rank #4
0.052
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Surrounding area
Pocket 5 P2Rank #5
0.026
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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 #9
0.639
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Surrounding area
Residue sets
UniProt: Active site:502-502 Proton donor
UniProt: Binding site:281-291
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_A0A0H3GT44
AlphaFold DB full sequence Viewing
ColabFold VK055_4106
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.

54 records
Chemistry signal

Structural ligand evidence is available for this target.

Direct evidence 0 same-protein records
Transferred evidence 4 records from similar proteins
Structural ligands 4 0 loaded crystals
Measured bioactivity 0 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
AG2 PDB via homolog 130.2 Da · LogP -0.79 · TPSA 87.9 Open detail RCSB PDB
AZ1 PDB via homolog Detail RCSB PDB
LLP PDB via homolog Detail RCSB PDB
TME PDB via homolog Detail RCSB PDB
ZINC1529497 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
AG2 RCSB PDB Q7MK24 130.2 Da LogP -0.79 TPSA 87.9 ✓ Ro5 ✓ Clean C(CCNC(=N)N)CN
AZ1 RCSB PDB Q58497 188.2 Da LogP 1.89 TPSA 74.6 ✓ Ro5 ✓ Clean C(CCCC(=O)O)CCCC(=O)O
LLP RCSB PDB A1SR00 375.3 Da LogP 0.71 TPSA 175.6 ✓ Ro5 ✓ Clean Cc1c(c(c(cn1)COP(=O)(O)O)/C=N/CCCCC(C(=O)O)N)O
TME RCSB PDB A1SR00 44.1 Da LogP 1.42 TPSA 0.0 ✓ Ro5 ✓ Clean CCC

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.