1 Contains
| DB identifier | Type | Name |
|---|---|---|
| IPR018338 | Conserved_site | Carbonic anhydrase, alpha-class, conserved site |
| Type: | Domain | Name: | Alpha carbonic anhydrase |
| Description: | Carbonic anhydrases (CA: ) are zinc metalloenzymes which catalyse the reversible hydration of carbon dioxide to bicarbonate [, ]. The alpha-CAs are found predominantly in animals but also in bacteria and green algae. There are at least 15 isoforms found in mammals, which can be subdivided into cytosolic CAs (CA-I, CA-II, CA-III, CA-VII and CA XIII), mitochondrial CAs (CA-VA and CA-VB), secreted CAs (CA-VI), membrane-associated (CA-IV, CA-IX, CA-XII and CA-XIV) and those without CA activity, the CA-related proteins (CA-RP VIII, X and XI).This entry represents a domain characteristic of alpha class carbonic anhydrases. The dominating secondary structure is a 10-stranded, twisted beta-sheet, which divides the molecules into two halves []. Alpha-CAs contain a single zinc atom bound to three conserved histidine residues. The catalytically active group is the zinc-bound water which ionizes to a hydroxide group. In the mechanism of catalysis, nucleophilic attack of CO2 by a zinc-bound hydroxide ion is followed by displacement of the resulting zinc-bound bicarbonate ion by water; subsequent deprotonation regenerates the nucleophilic zinc-bound hydroxide ion [, ]. | Short Name: | Carbonic_anhydrase_a |
| DB identifier | Type | Name |
|---|---|---|
| IPR018338 | Conserved_site | Carbonic anhydrase, alpha-class, conserved site |
