منابع مشابه
Adenylate kinase activity in ABC transporters.
ABC transporters are remarkably versatile machines that move a wide array of substances, including both hydrophilic and hydrophobic molecules across membranes (1-4). They are constructed with a modular design; each transporter has two nucleotidebinding domains (NBDs) and two membrane-spanning domains (often comprising six transmembrane helices). The NBDs are highly conserved modules that intera...
متن کاملCoupled ATPase-adenylate kinase activity in ABC transporters
ATP-binding cassette (ABC) transporters, a superfamily of integral membrane proteins, catalyse the translocation of substrates across the cellular membrane by ATP hydrolysis. Here we demonstrate by nucleotide turnover and binding studies based on 31P solid-state NMR spectroscopy that the ABC exporter and lipid A flippase MsbA can couple ATP hydrolysis to an adenylate kinase activity, where ADP ...
متن کاملStructural basis for adenylate kinase activity in ABC ATPases.
ATP-binding cassette (ABC) enzymes are involved in diverse biological processes ranging from transmembrane transport to chromosome cohesion and DNA repair. They typically use ATP hydrolysis to conduct energy-dependent biological reactions. However, the cystic fibrosis transmembrane conductance regulator and the DNA repair protein Rad50 can also catalyze the adenylate kinase reaction (ATP+AMP<--...
متن کاملE VALUATION OF ADENYLATE CYCLASE ACTIVITY IN MITRAL VALVE PROLAPSE
The term mitral valve prolapse (MVP) is used for a particular subset of patients with hyperadrenergic dysautonomia. It occurs when part of a leaflet or both leaflets of the mitral valve extend above the plane of the atrioventricular junction during ventricular systole. The adenylate cyclase activity in MVP dys-autonomia was studied by extraction of enzyme from the erythrocytes from 62 norma...
متن کاملConformational Transitions in Adenylate Kinase
Large conformational changes in the LID and NMP domains of adenylate kinase (AKE) are known to be key to ligand binding and catalysis, yet the order of binding events anddomainmotion is not well understood. Combining the multiple available structures for AKEwith the energy landscape theory for protein folding, a theoretical model was developed for allostery, order of binding events, and efficie...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1953
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(18)66137-x