Biochemical Properties and Intracellular Processing of Lysosomal Cathepsins B and H

Yukio Nishimura, Hiroshi Tsuji, Keitaro Kato, Hiroshi Sato, Jun Amano, Masaru Himeno, Hiroshi Tsuji

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Lysosomal cysteine proteinases of cathepsins B and H were isolated to a homogeneous state from rat liver by employing Sephadex G-75, DEAE-Sephacel, CM-Sephadex, and Mono S column chromatography. Each of the purified cathepsins B and H was demonstrated to be composed of a mixture of a single-chain form and the processed two-chain form upon sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). To investigate the proteolytic maturation of lysosomal cathepsins B and H, turnover kinetics of these enzymes were studied by comparing the specific radioactivities of the incorporated [3H] leucine into either the single-chain form or two-chain form in vivo. The specific radioactivity derived from each protein band of lysosomal cathepsin H in SDS-PAGE at 1, 3, 6, 12, 24 and 48h after the injection of a radiolabel showed that the peak of specific radioactivity of the single-chain form of cathepsin H appeared at 6h and that after 6h, the radiolabel was sequentially incorporated into the two-chain form, while the radiolabel in the single-chain form started to gradually decrease, suggesting that the single-chain form was processed to generate the mature enzyme after the enzyme was incorporated into the lysosomes. In contrast, in the case of cathepsin B, the appearance of a radiolabel in the single-chain form or in the two-chain form was observed almost concomitantly without time lag, indicating that the processing of cathepsin B occurred very rapidly in the lysosomes.

Original languageEnglish
Pages (from-to)829-836
Number of pages8
JournalBiological and Pharmaceutical Bulletin
Volume18
Issue number6
DOIs
Publication statusPublished - Jan 1 1995

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Cathepsin H
Cathepsin B
Radioactivity
yeast proteinase B
Lysosomes
Sodium Dodecyl Sulfate
Polyacrylamide Gel Electrophoresis
Enzymes
Cysteine Proteases
Leucine
Chromatography
Injections
Liver

All Science Journal Classification (ASJC) codes

  • Pharmacology
  • Pharmaceutical Science

Cite this

Nishimura, Y., Tsuji, H., Kato, K., Sato, H., Amano, J., Himeno, M., & Tsuji, H. (1995). Biochemical Properties and Intracellular Processing of Lysosomal Cathepsins B and H. Biological and Pharmaceutical Bulletin, 18(6), 829-836. https://doi.org/10.1248/bpb.18.829

Biochemical Properties and Intracellular Processing of Lysosomal Cathepsins B and H. / Nishimura, Yukio; Tsuji, Hiroshi; Kato, Keitaro; Sato, Hiroshi; Amano, Jun; Himeno, Masaru; Tsuji, Hiroshi.

In: Biological and Pharmaceutical Bulletin, Vol. 18, No. 6, 01.01.1995, p. 829-836.

Research output: Contribution to journalArticle

Nishimura, Y, Tsuji, H, Kato, K, Sato, H, Amano, J, Himeno, M & Tsuji, H 1995, 'Biochemical Properties and Intracellular Processing of Lysosomal Cathepsins B and H', Biological and Pharmaceutical Bulletin, vol. 18, no. 6, pp. 829-836. https://doi.org/10.1248/bpb.18.829
Nishimura, Yukio ; Tsuji, Hiroshi ; Kato, Keitaro ; Sato, Hiroshi ; Amano, Jun ; Himeno, Masaru ; Tsuji, Hiroshi. / Biochemical Properties and Intracellular Processing of Lysosomal Cathepsins B and H. In: Biological and Pharmaceutical Bulletin. 1995 ; Vol. 18, No. 6. pp. 829-836.
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