Expression, purification, crystallization and preliminary X-ray analysis of calmodulin in complex with the regulatory domain of the plasma-membrane Ca2+-ATPase ACA8
Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
Plasma-membrane Ca2+-ATPases (PMCAs) are calcium pumps that expel Ca2+ from eukaryotic cells to maintain overall Ca2+ homoeostasis and to provide local control of intracellular Ca2+ signalling. They are of major physiological importance, with different isoforms being essential, for example, for presynaptic and postsynaptic Ca2+ regulation in neurons, feedback signalling in the heart and sperm motility. In the resting state, PMCAs are autoinhibited by binding of their C-terminal (in mammals) or N-terminal (in plants) tail to two major intracellular loops. Activation requires the binding of calcium-bound calmodulin (Ca2+-CaM) to this tail and a conformational change that displaces the autoinhibitory tail from the catalytic domain. The complex between calmodulin and the regulatory domain of the plasma-membrane Ca2+-ATPase ACA8 from Arabidopsis thaliana has been crystallized. The crystals belonged to space group C2, with unit-cell parameters a = 176.8, b = 70.0, c = 69.8 Å, = 113.2°. A complete data set was collected to 3.0 Å resolution and structure determination is in progress in order to elucidate the mechanism of PMCA activation by calmodulin
Originalsprog | Engelsk |
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Tidsskrift | Acta Crystallographica. Section F: Structural Biology and Crystallization Communications Online |
Vol/bind | 66 |
Sider (fra-til) | 361-363 |
Antal sider | 3 |
ISSN | 1744-3091 |
DOI | |
Status | Udgivet - 2010 |
ID: 49331912