Unknown

Dataset Information

0

Structural aspects of calcium-release activated calcium channel function.


ABSTRACT: Store-operated calcium (Ca(2+)) entry is the process by which molecules located on the endo/sarcoplasmic reticulum (ER/SR) respond to decreased luminal Ca(2+) levels by signaling Ca(2+) release activated Ca(2+) channels (CRAC) channels to open on the plasma membrane (PM). This activation of PM CRAC channels provides a sustained cytosolic Ca(2+) elevation associated with myriad physiological processes. The identities of the molecules which mediate SOCE include stromal interaction molecules (STIMs), functioning as the ER/SR luminal Ca(2+) sensors, and Orai proteins, forming the PM CRAC channels. This review examines the current available high-resolution structural information on these CRAC molecular components with particular focus on the solution structures of the luminal STIM Ca(2+) sensing domains, the crystal structures of cytosolic STIM fragments, a closed Orai hexameric crystal structure and a structure of an Orai1 N-terminal fragment in complex with calmodulin. The accessible structural data are discussed in terms of potential mechanisms of action and cohesiveness with functional observations.

SUBMITTER: Stathopulos PB 

PROVIDER: S-EPMC3913758 | biostudies-literature | 2013 Sep-Oct

REPOSITORIES: biostudies-literature

altmetric image

Publications

Structural aspects of calcium-release activated calcium channel function.

Stathopulos Peter B PB   Ikura Mitsuhiko M  

Channels (Austin, Tex.) 20130901 5


Store-operated calcium (Ca(2+)) entry is the process by which molecules located on the endo/sarcoplasmic reticulum (ER/SR) respond to decreased luminal Ca(2+) levels by signaling Ca(2+) release activated Ca(2+) channels (CRAC) channels to open on the plasma membrane (PM). This activation of PM CRAC channels provides a sustained cytosolic Ca(2+) elevation associated with myriad physiological processes. The identities of the molecules which mediate SOCE include stromal interaction molecules (STIMs  ...[more]

Similar Datasets

| S-EPMC2533247 | biostudies-literature
| S-EPMC3695727 | biostudies-literature
| S-EPMC8100157 | biostudies-literature
| S-EPMC8562847 | biostudies-literature
| S-EPMC3808583 | biostudies-literature
| S-EPMC7723414 | biostudies-literature
| S-EPMC7182068 | biostudies-literature
| S-EPMC5470873 | biostudies-literature
| S-EPMC7140111 | biostudies-literature
| S-EPMC2781737 | biostudies-literature