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Nucleotide binding and dimerization at the chloroplast pre-protein import receptor, atToc33, are not essential in vivo but do increase import efficiency.

Abstract:

The atToc33 protein is one of several pre-protein import receptors in the outer envelope of Arabidopsis chloroplasts. It is a GTPase with motifs characteristic of such proteins, and its loss in the plastid protein import 1 (ppi1) mutant interferes with the import of photosynthesis-related pre-proteins, causing a chlorotic phenotype in mutant plants. To assess the significance of GTPase cycling by atToc33, we generated several atToc33 point mutants with predicted effects on GTP binding (K49R, ...

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Publication status:
Published

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Journal:
Plant journal : for cell and molecular biology
Volume:
63
Issue:
2
Pages:
297-311
Publication date:
2010-07-01
DOI:
EISSN:
1365-313X
ISSN:
0960-7412

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