FUNCTION, IDENTIFICATION BY MASS SPECTROMETRY, BIOPHYSICOCHEMICAL PROPERTIES, ACTIVITY REGULATION, CLEAVAGE OF SIGNAL PEPTIDE AFTER LYS-26, CLEAVAGE OF ACTIVATION PROPEPTIDE AFTER LYS-102, CLEAVAGE OF C-TERMINUS PROPEPTIDE AFTER LYS-342, MUTAGENESIS OF CYS-131
AtCathB2 and AtCathB3 are two closely related PLCPs which display subtle differences in their hydrolytic properties and substrate specificities. Both enzymes can act as endopeptidases and carboxydipeptidases.[CathB3]
Endoplasmic reticulum-stress-induced programmed cell death is regulated positively by cathepsin B and negatively by PBA1 revealing a complex picture behind caspase-3-like activity in plants. Cathepsin B may execute its function after tonoplast rupture and works in parallel with VPE.[cathepsin B3]
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