KpKP13 Protein target profile

Carbonic anhydrase 2

Accession: KP13_01863

Gene: can AHE46303.1 3D evidence: AlphaFold DB model + ColabFold model UniProt A0A0H3GRW3
Length 220
Pocket druggability (P2Rank · AlphaFold DB model) 0.054
Direct ligand evidence 0 155 total records
Functional annotation 0 EC 3 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
3.6% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

Essential (DEG)
Y
DEG identity (%)
95.455 Higher values support similarity to known essential genes.
DEG E-value
1.81e-160 Smaller values mean stronger essential-gene similarity.

Structure confidence

ColabFold pLDDT
94.64 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) 0.054
Structure A0A0H3GRW3
Pocket Pocket 1
Druggability (FPocket) 0.175
Structure A0A0H3GRW3
Pocket Pocket 7
ColabFold model
P2Rank 0.074 · Pocket 1
FPocket 0.154 · Pocket 6
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 173 / 4744 genomes with a hit
Prevalence 3.6%

Sequence

Primary amino-acid sequence viewer.

MNDIDTLISNNALWSKMLVEEDPGFFEKLSQTQKPRFLWIGCSDSRVPAERLTGLEPGELFVHRNVANLVIHTDLNCLSVVQYAVDVLEVEHIIICGHYGCGGVQAAVENPELGLIDNWLLHIRDIWFKHSSLLGEMPEERRLDTLCELNVMEQVYNLGHSTIMQSAWKRGQKVTIHGWAYGIHDGLLRDLDVTAVSRETLEQRYRHGISNLKIKHINHR

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

3 GO

Subcellular localization

Localization
Cytoplasmic

Gene Ontology (GO)

3
  • GO:0004089 Catalysis of the reaction: hydrogencarbonate + H+ = CO2 + H2O.
  • GO:0008270 Binding to a zinc ion (Zn).
  • GO:0015976 A series of processes that forms an integrated mechanism by which a cell or an organism detects the depletion of primary carbon sources and then activates genes to scavenge the last traces of the primary carbon source and to transport and metabolize alternative carbon sources such as carbon dioxide or carbonic acid. The utilization process begins when the cell or organism detects carbon levels, includes the activation of genes whose products detect, transport or metabolize carbon-containing substances, and ends when carbon is incorporated into the cell or organism's metabolism.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

16 records
Show feature table
Start End DB Term Name
1 211 FunFam G3DSA:3.40.1050.10:FF:000001 Carbonic anhydrase
3 195 PANTHER PTHR11002 CARBONIC ANHYDRASE
3 195 InterPro IPR001765 Carbonic anhydrase
11 191 CDD cd00883 beta_CA_cladeA
1 220 Gene3D G3DSA:3.40.1050.10 Carbonic anhydrase
1 220 InterPro IPR036874 Carbonic anhydrase superfamily
1 210 SUPERFAMILY SSF53056 beta-carbonic anhydrase, cab
1 210 InterPro IPR036874 Carbonic anhydrase superfamily
82 102 ProSitePatterns PS00705 Prokaryotic-type carbonic anhydrases signature 2.
82 102 InterPro IPR015892 Carbonic anhydrase, prokaryotic-like, conserved site
38 187 Pfam PF00484 Carbonic anhydrase
38 187 InterPro IPR001765 Carbonic anhydrase
42 49 ProSitePatterns PS00704 Prokaryotic-type carbonic anhydrases signature 1.
42 49 InterPro IPR015892 Carbonic anhydrase, prokaryotic-like, conserved site
30 192 SMART SM00947 Pro_CA_2
30 192 InterPro IPR001765 Carbonic anhydrase

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
0.054
Show in viewer
Surrounding area
Pocket 2 P2Rank #2
0.041
Show in viewer
Surrounding area
Pocket 3 P2Rank #3
0.016
Show in viewer
Surrounding area
Residue sets
UniProt: Binding site:26-26
UniProt: Binding site:28-28
UniProt: Binding site:82-82
UniProt: Binding site:85-85
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_A0A0H3GRW3
AlphaFold DB full sequence Viewing
ColabFold KP13_01863
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.

155 records
Chemistry signal

Structural and bioactivity evidence are both available for this target.

Direct evidence 0 same-protein records
Transferred evidence 105 records from similar proteins
Structural ligands 5 0 loaded crystals
Measured bioactivity 100 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
4MZ PDB via homolog 82.1 Da · LogP 0.72 · TPSA 28.7 Open detail RCSB PDB
AZI PDB via homolog Detail RCSB PDB
AZM PDB via homolog Detail RCSB PDB
CO2 PDB via homolog Detail RCSB PDB
FUS 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
4MZ RCSB PDB Q9HVB9 82.1 Da LogP 0.72 TPSA 28.7 ✓ Ro5 ✓ Clean Cc1c[nH]cn1
AZI RCSB PDB Q96554 42.0 Da LogP 0.87 TPSA 58.7 ✓ Ro5 Alert [N-]=[N+]=[N-]
AZM RCSB PDB Q96554 222.3 Da LogP -0.86 TPSA 115.0 ✓ Ro5 ✓ Clean CC(=O)Nc1nnc(s1)S(=O)(=O)N
CO2 RCSB PDB Q9HVB9 44.0 Da LogP -0.58 TPSA 34.1 ✓ Ro5 ✓ Clean C(=O)=O
FUS RCSB PDB Q9HVB9 96.1 Da LogP -1.85 TPSA 86.2 ✓ Ro5 ✓ Clean NS(=O)(=O)N

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.

Chemistry

ChEMBL CHEMBL501294 ChEMBL CHEMBL1092054 ChEMBL CHEMBL6633 ChEMBL CHEMBL469126 ChEMBL CHEMBL468294 ChEMBL CHEMBL3785289 ChEMBL CHEMBL468094 ChEMBL CHEMBL513854 ChEMBL CHEMBL467258 ChEMBL CHEMBL6852 ChEMBL CHEMBL513835 ChEMBL CHEMBL3765353 ChEMBL CHEMBL3785846 ChEMBL CHEMBL468946 ChEMBL CHEMBL268439 ChEMBL CHEMBL466832 ChEMBL CHEMBL475972 ChEMBL CHEMBL467897 ChEMBL CHEMBL515310 ChEMBL CHEMBL514992 ChEMBL CHEMBL467898 ChEMBL CHEMBL475973 ChEMBL CHEMBL476813 ChEMBL CHEMBL511239 ChEMBL CHEMBL3787255 ChEMBL CHEMBL476395 ChEMBL CHEMBL2331755 ChEMBL CHEMBL3787586 ChEMBL CHEMBL477016 ChEMBL CHEMBL2331756 ChEMBL CHEMBL3785591 ChEMBL CHEMBL466234 ChEMBL CHEMBL476599 ChEMBL CHEMBL4171057 ChEMBL CHEMBL468945 ChEMBL CHEMBL3786965 ChEMBL CHEMBL2331768 ChEMBL CHEMBL4172094 ChEMBL CHEMBL2376275 ChEMBL CHEMBL2376276 ChEMBL CHEMBL3785209 ChEMBL CHEMBL4177136 ChEMBL CHEMBL446212 ChEMBL CHEMBL3786969 ChEMBL CHEMBL4159776 ChEMBL CHEMBL4163368 ChEMBL CHEMBL500025 ChEMBL CHEMBL2047814 ChEMBL CHEMBL3785654 ChEMBL CHEMBL3787472 ChEMBL CHEMBL4161495 ChEMBL CHEMBL6705 ChEMBL CHEMBL3786724 ChEMBL CHEMBL4173293 ChEMBL TUO ChEMBL BZ1 ChEMBL CHEMBL1369708 ChEMBL CHEMBL3786477 ChEMBL CHEMBL4175131 ChEMBL CHEMBL515010 ChEMBL EHO ChEMBL CHEMBL4164241 ChEMBL CHEMBL443052 ChEMBL CHEMBL3787489 ChEMBL CHEMBL4174083 ChEMBL CHEMBL4167266 ChEMBL CHEMBL476609 ChEMBL CHEMBL3785467 ChEMBL EZL ChEMBL CHEMBL2331764 ChEMBL CEL ChEMBL CHEMBL2047808 ChEMBL CHEMBL2331763 ChEMBL D8W ChEMBL TOR ChEMBL CHEMBL521690 ChEMBL CHEMBL2047818 ChEMBL CHEMBL2376273 ChEMBL CHEMBL2331765 ChEMBL CHEMBL3787222 ChEMBL CHEMBL515782 ChEMBL CHEMBL2047807 ChEMBL EF6 ChEMBL CHEMBL2331759 ChEMBL CHEMBL2331762 ChEMBL CHEMBL3785153 ChEMBL CHEMBL2331766 ChEMBL CHEMBL2376274 ChEMBL CHEMBL3785735 ChEMBL CHEMBL2047796 ChEMBL CHEMBL2331761 ChEMBL CHEMBL2047839 ChEMBL CHEMBL3786062 ChEMBL CHEMBL3633555 ChEMBL ZYX ChEMBL M28 ChEMBL 6M9 ChEMBL CHEMBL3785827 ChEMBL CHEMBL4174497 ChEMBL CHEMBL4176682