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Lipids may not be involved in the recognition of apocytochrome c during its transportation
Author(s) -
Ma Q. F.,
Yang F. Y.
Publication year - 1997
Publication title -
iubmb life
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.132
H-Index - 113
eISSN - 1521-6551
pISSN - 1521-6543
DOI - 10.1080/15216549700201511
Subject(s) - bacterial outer membrane , vesicle , mitochondrion , translocase of the outer membrane , microsome , membrane , translocase of the inner membrane , membrane lipids , inner mitochondrial membrane , biochemistry , inner membrane , biology , chemistry , mitochondrial membrane transport protein , biophysics , microbiology and biotechnology , in vitro , escherichia coli , gene
It was shown that apocytochrome c was less insertion into monolayers from outer mitochondrial membrane lipids than into those from microsomal membrane lipids; the (α‐helix content of apocytochrome c induced by small unilamellar vesicles prepared from outer mitochondrial membrane lipids was less than by those from microsomal membrane lipids; the import efficiency of apocytochrome c into large unilamellar vesicles from outer mitochondrial membrane lipids was also lower than into those from microsome membrane lipids. No specific affinity between apocytochrome c and outer mitochondrial membrane lipids could be found. Import of apocytochrome c across the intact mitochondria, sealed outer mitochondrial membrane and microsome membrane vesicles was compared. Results showed that apocytochrome c was accumulated only in mitochondria, but not the other two kinds of vesicles.