Molecular cloning and sequencing of cDNA for rat cathepsin H Homology in pro‐peptide regions of cysteine proteinases

Abstract
A cDNA for rat cathepsin H was isolated and sequenced. The deduced protein comprising 333 amino acid residues is composed of a typical signal sequence (21 residues), a pro-peptide region (92 residues) and a mature enzyme region (220 residues). The amino acid sequence in the pro-peptide region, in particular, residues Phe-(−41) to Ser-(−29) of cathepsin H, is highly homologous to the pro-peptide regions of other cysteine proteinases. This homologous region may play a role in the processing of cysteine proteinases.

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