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Import and processing of proteins by castor bean leucoplasts
Author(s) -
Halpin Claire,
Musgrove Janet E.,
Lord J.Michael,
Robinson Colin
Publication year - 1989
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/0014-5793(89)81608-4
Subject(s) - plastocyanin , chloroplast , thylakoid , biochemistry , chemistry , biology , botany , photosystem i , gene
The precursor of plastocyanin, a thylakoid lumen protein, is imported by castor bean leucoplasts and processed to an intermediate form by a stromal processing peptidase of similar properties and specificity to the corresponding chloroplast enzyme. No further maturation is observed, indicating that the internal protein transport and maturation system present in the chloroplast is absent in leucoplasts.