Catalytic and noncatalytic nucleotide binding sites of chloroplast F1ATPase Photoaffinity labeling and peptide sequencing
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چکیده
منابع مشابه
Photoaffinity labeling of peptide hormone binding sites.
The known binding of a derivative of the COOH-terminal tetrapeptide of gastrin with high biological activity to bovine serum albumin suggests a convenient model system for testing the affinity labeling of hormone binding sites. Photolysis of 4-azidobenzoylpentagastrin, Z-nitro-5-azidobenzoylpentagastrin, 4-acetylbenzoylpentagastrin, and 4-benzoylbenzoylpentagastrin in the presence of bovine ser...
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2-Azidoadenine [32P]nucleotide was bound specifically at catalytic or noncatalytic nucleotide binding sites on beef heart mitochondrial F1 ATPase. In both cases, photolysis resulted in nearly exclusive labeling of the beta subunit. The modified enzyme was digested with trypsin, and labeled peptides were purified by reversed-phase high-pressure liquid chromatography. Amino acid sequence analysis...
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An analog of ADP containing an azido group at the C-2 position of the purine ring has been synthesized and used as an affinity probe of the membrane-bound coupling factor 1 of spinach chloroplast thylakoid membranes. The 2-azido-ADP inhibited light-induced dark binding of ADP at the tight nucleotide binding site on the thylakoid membranes. The 2-azido-ADP itself bound tightly to the thylakoid m...
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We have studied the properties of beef heart mitochondrial F1 having inhibitory MgADP bound at one of the three catalytic sites and various levels of occupancy of the three noncatalytic nucleotide sites including zero, two, or three ADP/ATPs or two ADP/ATP plus one GTP. The properties examined include the rate of MgATP-dependent reactivation and the rate of increase in the fraction of F1 contai...
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Retinoid-binding proteins are essential mediators of vitamin A function in vertebrate organisms. They solubilize and stabilize retinoids, and they direct the intercellular and intracellular trafficking, transport, and metabolic function of vitamin A compounds in vision and in growth and development. Although many soluble retinoid-binding proteins and receptors have been purified and extensively...
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ژورنال
عنوان ژورنال: FEBS Letters
سال: 1987
ISSN: 0014-5793
DOI: 10.1016/0014-5793(87)80325-3