The Proteolytic Machinery of Chloroplasts: Homologues of Bacterial Proteases

  • Zach Adam
  • Tamar Halperin
  • Hanan Itzhaki
  • Marika Lindahl
  • Oren Ostersetzer
Chapter

Abstract

In the past 10–15 years, many examples of non-specific and specific degradation of proteins in the chloroplast have accumulated [for review, see (1)]. These include degradation of photo- and oxidatively damaged proteins, proteins whose levels are regulated by different environmental conditions, unassembled proteins, and proteins lacking their prosthetic groups. However, the proteases involved in their degradation were largely unknown. As a first step toward identification of the proteases involved in these specific proteolytic processes, we identified and characterized several chloroplast proteases, all of which are homologues of bacterial proteases. In this paper, we provide an overview of these proteases, present recent related data, and discuss the implications of these on our understanding of proteolytic processes in chloroplasts.

Key Words

protein turnover degradation thylakoid membranes D1 turnover 

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Copyright information

© Springer Science+Business Media Dordrecht 1998

Authors and Affiliations

  • Zach Adam
    • 1
  • Tamar Halperin
    • 1
  • Hanan Itzhaki
    • 1
  • Marika Lindahl
    • 1
  • Oren Ostersetzer
    • 1
  1. 1.Dept. of Agricultural BotanyThe Hebrew UniversityRehovotIsrael

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