Intracellular transport and processing of lysosomal cathepsin H

Yukio Nishimura, Keitaro Kato

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28 Citations (Scopus)


Intracellular transport and processing of lysosomal cathepsin H was investigated in the subcellular fractions of rat liver by pulse-labeling experiments with [35S]methionine in vivo. A newly synthesized procathepsin H with a molecular weight of 41 kDa first appeared in the rough microsomal fraction at 10 min postinjection of label. This procathepsin H moved from the microsomal fraction to the Golgi subfractions at 30 min. Then a processed single-chain form with 28 kDa appeared in the lysosomal fraction at 60 min and persisted as the predominant form after 180 min. These results suggest that the propeptide-processing of procathepsin H indeed takes place in lysosomes in the course of intracellular transport from endoplasmic reticulum via Golgi complex to lysosomes.

Original languageEnglish
Pages (from-to)329-334
Number of pages6
JournalBiochemical and Biophysical Research Communications
Issue number1
Publication statusPublished - Oct 14 1987

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology


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