Enables catalase activity. Involved in several processes, including hydrogen peroxide catabolic process; response to ozone; and response to vitamin. Located in several cellular components, including Golgi apparatus; mitochondrial intermembrane space; and peroxisome. Used to study bacterial pneumonia; brain ischemia; cholestasis; colitis; and lung disease. Biomarker of several diseases, including artery disease (multiple); auditory system disease (multiple); end stage renal disease; eye disease (multiple); and neurodegenerative disease (multiple). Human ortholog(s) of this gene implicated in several diseases, including acatalasia; eye disease (multiple); lung disease (multiple); osteonecrosis; and pseudoxanthoma elasticum. Orthologous to human CAT (catalase). [provided by Alliance of Genome Resources, Apr 2022]