Crossref journal-article
Proceedings of the National Academy of Sciences
Proceedings of the National Academy of Sciences (341)
Abstract

The inositol 1,4,5-trisphosphate receptor (IP 3 R) is a tetrameric intracellular Ca 2+ channel, which mediates the release of Ca 2+ from the endoplasmic reticulum in response to many different extracellular stimuli. We present a 3D structure of the type 1 IP 3 R obtained by electron microscopy and single-particle analysis that reveals its domain organization. The IP 3 R has a flower-like appearance with fourfold symmetry and is made up of three distinct domains connected by slender links. By relating the organization of the structural domains to secondary-structure predictions and biochemical data we develop a model in which structural domains are mapped onto the amino acid sequence to deduce the location of the channel region and the cytoplasmic inositol 1,4,5-trisphosphate-binding and modulatory subdomains. The structure of the IP 3 R is compared with that of other tetrameric cation channels. The channel domain is similar in size and shape to its counterparts in the ryanodine receptor and the Shaker voltage-gated K + channel.

Bibliography

da Fonseca, P. C. A., Morris, S. A., Nerou, E. P., Taylor, C. W., & Morris, E. P. (2003). Domain organization of the type 1 inositol 1,4,5-trisphosphate receptor as revealed by single-particle analysis. Proceedings of the National Academy of Sciences, 100(7), 3936–3941.

Dates
Type When
Created 22 years, 4 months ago (April 1, 2003, 2:25 p.m.)
Deposited 3 years, 4 months ago (April 25, 2022, 10:05 p.m.)
Indexed 11 months, 3 weeks ago (Sept. 6, 2024, 7:52 p.m.)
Issued 22 years, 5 months ago (March 21, 2003)
Published 22 years, 5 months ago (March 21, 2003)
Published Online 22 years, 5 months ago (March 21, 2003)
Published Print 22 years, 4 months ago (April 1, 2003)
Funders 0

None

@article{da_Fonseca_2003, title={Domain organization of the type 1 inositol 1,4,5-trisphosphate receptor as revealed by single-particle analysis}, volume={100}, ISSN={1091-6490}, url={http://dx.doi.org/10.1073/pnas.0536251100}, DOI={10.1073/pnas.0536251100}, number={7}, journal={Proceedings of the National Academy of Sciences}, publisher={Proceedings of the National Academy of Sciences}, author={da Fonseca, Paula C. A. and Morris, Stephen A. and Nerou, Edmund P. and Taylor, Colin W. and Morris, Edward P.}, year={2003}, month=mar, pages={3936–3941} }