Cysteine endopeptidase that digests in vitro both the acidic and basic subunits of glutelin, the major seed storage protein of rice (PubMed:8706734). Acts as negative regulator of cell death (PubMed:23938390). Optimum pH is 4.5-6.0. Expressed in germinating seeds. Expressed in seedlings, from 6 to 21 days after germination. Induced by treatment with gibberellin (GA3) (PubMed:9435140). Induced during senescence and pathogen-induced cell death (PubMed:23938390). Plants silencinge REP1 develop early senescence at varying levels and show enhanced cell death when inoculated with the bacterial pathogen Xanthomonas oryzae pv oryzae. Belongs to the peptidase C1 family.