2iqf Summary

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Crystal structure of Helicobacter pylori catalase compound I

The structure was published by Alfonso-Prieto, M., Borovik, A., Carpena, X., et al., Fita, I., Rovira, C., and Loewen, P.C., in 2007 in a paper entitled "The structures and electronic configuration of compound I intermediates of Helicobacter pylori and Penicillium vitale catalases determined by X-ray crystallography and QM/MM density functional theory calculations." (abstract).

This crystal structure was determined using X-ray diffraction at a resolution of 1.86 Å and deposited in 2006.

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

This PDB entry contains multiple copies of the structure of Catalase.

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 most likely forms homotetramers.

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 Catalase P77872 (1-505) (CATA_HELPY)search Helicobacter pylori 26695search 100% 505 97%
B Catalase P77872 (1-505) (CATA_HELPY)search Helicobacter pylori 26695search 100% 505 97%


This entry contains 1 unique UniProt protein:

UniProt accession Name Organism PDB
P77872 (1 - 505) Catalase Helicobacter pylori

Chain Structural classification (SCOP) Sequence family (Pfam)
A, B (P77872) Heme-dependent catalasessearch PF00199: Catalasesearch, PF06628: Catalase-related immune-responsivesearch

Chain ID Biological process (GO) Molecular function (GO) Cellular component (GO)
A, B (P77872) response to oxidative stresssearch oxidation-reduction processsearch hydrogen peroxide catabolic processsearch heme bindingsearch catalase activitysearch oxidoreductase activitysearch metal ion bindingsearch protein bindingsearch peroxidase activitysearch cytoplasmsearch

Chain InterPro annotation
A, B Catalase haem-binding sitesearch Catalase immune-responsive domainsearch Catalase core domainsearch Catalase, mono-functional, haem-containingsearch Catalase-like domainsearch Catalase active sitesearch Catalase, mono-functional, haem-containing, clades 1 and 3search