2hnc Summary

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Crystal structure of the human carbonic anhydrase II in complex with the 5-amino-1,3,4-thiadiazole-2-sulfonamide inhibitor.

The structure was published by Menchise, V., De Simone, G., Di Fiore, A., Scozzafava, A., and Supuran, C.T., in 2006 in a paper entitled "Carbonic anhydrase inhibitors: X-ray crystallographic studies for the binding of 5-amino-1,3,4-thiadiazole-2-sulfonamide and 5-(4-amino-3-chloro-5-fluorophenylsulfonamido)-1,3,4-thiadiazole-2-sulfonamide to human isoform II." (abstract).

This crystal structure was determined using X-ray diffraction at a resolution of 1.55 Å and deposited in 2006.

The experimental data on which the structure is based was also deposited.

The PDB entry contains the structure of Carbonic anhydrase 2. This molecule has the UniProt identifier P00918 (CAH2_HUMAN)search. The sample contained 259 residues which is 99% of the natural sequence. Out of 259 residues 257 were observed and are deposited in the PDB.

It also contains one or more heterogenic compounds (e.g., ligands, co-factors, ions, modified amino acids, etc.); see here for a complete list.

The molecule is most likely monomeric.

The following tables show cross-reference information to other databases (to obtain a list of all PDB entries sharing the same property or classification, click on the magnifying glass icon):


Chain Name UniProt Name of source organism % of UniProt sequence present in the sample Residues in the sample molecules % of residues observed
A Carbonic anhydrase 2 P00918 (2-259) (CAH2_HUMAN)search Homo sapienssearch 98% 259 99%


This entry contains 1 unique UniProt protein:

UniProt accession Name Organism PDB
P00918 (2 - 259) Carbonic anhydrase 2 Homo sapiens

Chain Structural classification (SCOP) Structural classification (CATH) Sequence family (Pfam)
A (P00918) Carbonic anhydrasesearch Carbonic Anhydrase IIsearch PF00194: Eukaryotic-type carbonic anhydrasesearch

Chain ID Biological process (GO) Cellular component (GO) Molecular function (GO)
A (P00918) regulation of intracellular pHsearch cellular response to fluid shear stresssearch secretionsearch positive regulation of dipeptide transmembrane transportsearch response to pHsearch bicarbonate transportsearch morphogenesis of an epitheliumsearch regulation of chloride transportsearch regulation of anion transportsearch positive regulation of cellular pH reductionsearch positive regulation of synaptic transmission, GABAergicsearch response to estrogensearch odontogenesis of dentin-containing toothsearch response to zinc ionsearch kidney developmentsearch positive regulation of bone resorptionsearch response to organic substancesearch angiotensin-activated signaling pathwaysearch small molecule metabolic processsearch positive regulation of osteoclast differentiationsearch response to steroid hormonesearch one-carbon metabolic processsearch plasma membranesearch basolateral plasma membranesearch cytosolsearch myelin sheathsearch apical part of cellsearch cytoplasmsearch membranesearch extracellular spacesearch extracellular vesicular exosomesearch microvillussearch axonsearch zinc ion bindingsearch lyase activitysearch metal ion bindingsearch carbonate dehydratase activitysearch protein bindingsearch

Chain InterPro annotation
A Alpha carbonic anhydrasesearch Carbonic anhydrase, alpha-class, conserved sitesearch Carbonic anhydrase 2search Carbonic anhydrase, alpha-classsearch