Sec-independent Insertion of Thylakoid Membrane Proteins
نویسندگان
چکیده
منابع مشابه
Anionic lipids stimulate Sec-independent insertion of a membrane protein lacking charged amino acid side chains.
We have investigated the influence of the different lipid classes of Escherichia coli on Sec-independent membrane protein insertion, using an assay in which a mutant of the single-spanning Pf3 coat protein is biosynthetically inserted into liposomes. It was found that phosphatidylethanolamine and other non-bilayer lipids do not have a significant effect on insertion. Surprisingly, the anionic l...
متن کاملDistinct Albino3-dependent and -independent pathways for thylakoid membrane protein insertion.
The homologous proteins Oxa1, YidC, and Alb3 mediate the insertion of membrane proteins in mitochondria, bacteria, and chloroplast thylakoids, respectively. Depletion of YidC in Escherichia coli affects the integration of every membrane protein studied, and Alb3 has been shown previously to be required for the insertion of a signal recognition particle (SRP)-dependent protein, Lhcb1, in thylako...
متن کاملEscherichia coli YidC is a membrane insertase for Sec-independent proteins.
YidC is a recently discovered bacterial membrane protein that is related to the mitochondrial Oxa1p and the Alb3 protein of chloroplasts. These proteins are required in the membrane integration process of newly synthesized proteins that do not require the classical Sec machinery. Here we demonstrate that YidC is sufficient for the membrane integration of a Sec-independent protein. Microgram amo...
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iMembrane is a homology-based method, which predicts a membrane protein's position within a lipid bilayer. It projects the results of coarse-grained molecular dynamics simulations onto any membrane protein structure or sequence provided by the user. iMembrane is simple to use and is currently the only computational method allowing the rapid prediction of a membrane protein's lipid bilayer inser...
متن کاملThe secondary structure of proteins in the thylakoid membrane.
With reference spectra derived from proteins of known structure (C h e n , Y a n g , and M a r t in e z , Biochemistry 11, 4120 [1972]) a better approximation o f the circular dichroism spectrum of fragments of the thylakoid membrane is achieved, than by the use of polylysine as reference substance. Most probably the protein in the thylakoid membrane consists of 40 per cent helix, 42 per cent r...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1998
ISSN: 0021-9258
DOI: 10.1074/jbc.273.30.18979