2024年7月5日 · Catalase is a highly efficient enzyme, characterized by its quaternary structure, typically composed of four polypeptide chains. Each of these chains contains a heme group, which is essential for the enzyme’s activity.

2020年2月6日 · Catalase (EC 1.11.1.6) is a heme-containing enzyme ubiquitously present in most aerobic organisms. Although the full range of biological functions of catalase still remains unclear, its main function is the decomposition of hydrogen peroxide into water and oxygen.

2024年10月22日 · Explore the intricate structure and function of catalase, its mechanism, and substrate specificity in this comprehensive analysis. Catalase is an enzyme found in nearly all living organisms exposed to oxygen, playing a role in protecting cells from oxidative damage.

Catalase has one of the highest turnover numbers of all enzymes; one catalase molecule can convert millions of hydrogen peroxide molecules to water and oxygen each second. [6] Catalase is a tetramer of four polypeptide chains, each over 500 amino acids long. [7]

1999年6月1日 · According to structural and functional similarities catalases can be divided in three subgroups. Typical catalases are homotetrameric haem proteins. The three-dimensional structure of six representatives has been resolved to atomic resolution.

2019年3月8日 · The catalase structure is best thought of as consisting of four monomers, making it a tetramer. In turn, each monomer has four domains, and the second one contains the oxygen-binding heme group. Each enzyme can perform 800,000 events per second, converting hydrogen peroxide to oxygen and water.

Clade I contains the plant enzymes and one branch of bacterial catalases. Clade II contains only large subunit catalases with bacterial and fungal origins. Clade III contains a third group of bacterial enzymes as well as fungal and animal enzymes and …

According to structural and functional similarities catalases can be divided in three subgroups. Typical catalases are homotetrameric haem proteins. The three-dimensional structure of six representatives has been resolved to atomic resolution.

2024年7月11日 · Structure of Catalase. Catalase is a large, complex enzyme made up of four identical subunits, each containing an iron-containing heme group. This heme group is crucial for the enzyme’s ability to process hydrogen peroxide into water and oxygen.

Catalase structure from many different species has been studied by X-ray diffraction. Although it is clear that all catalases share a general structure, some differ in the number and identity of domains. In this display, beef liver catalase will be used as a model for catalase structure.