This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.

Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.

4uwa

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Revision as of 08:26, 18 December 2019

Structure of the ryanodine receptor at resolution of 6.1 A in closed state

Structural highlights

4uwa is a 4 chain structure with sequence from Oryctolagus cuniculus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
NonStd Res:
Related:	4uwe
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[RYR1_RABIT] Calcium channel that mediates the release of Ca(2+) from the sarcoplasmic reticulum into the cytoplasm and thereby plays a key role in triggering muscle contraction following depolarization of T-tubules. Repeated very high-level exercise increases the open probability of the channel and leads to Ca(2+) leaking into the cytoplasm. Can also mediate the release of Ca(2+) from intracellular stores in neurons, and may thereby promote prolonged Ca(2+) signaling in the brain. Required for normal embryonic development of muscle fibers and skeletal muscle. Required for normal heart morphogenesis, skin development and ossification during embryogenesis (By similarity).^[1] ^[2]

Publication Abstract from PubMed

Muscle contraction is initiated by the release of calcium (Ca2+) from the sarcoplasmic reticulum into the cytoplasm of myocytes through ryanodine receptors (RyRs). RyRs are homotetrameric channels with a molecular mass of more than 2.2 megadaltons that are regulated by several factors, including ions, small molecules and proteins. Numerous mutations in RyRs have been associated with human diseases. The molecular mechanism underlying the complex regulation of RyRs is poorly understood. Using electron cryomicroscopy, here we determine the architecture of rabbit RyR1 at a resolution of 6.1 A. We show that the cytoplasmic moiety of RyR1 contains two large alpha-solenoid domains and several smaller domains, with folds suggestive of participation in protein-protein interactions. The transmembrane domain represents a chimaera of voltage-gated sodium and pH-activated ion channels. We identify the calcium-binding EF-hand domain and show that it functions as a conformational switch allosterically gating the channel.

Architecture and conformational switch mechanism of the ryanodine receptor.,Efremov RG, Leitner A, Aebersold R, Raunser S Nature. 2014 Dec 1. doi: 10.1038/nature13916. PMID:25470059^[3]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Dulhunty AF, Laver DR, Gallant EM, Casarotto MG, Pace SM, Curtis S. Activation and inhibition of skeletal RyR channels by a part of the skeletal DHPR II-III loop: effects of DHPR Ser687 and FKBP12. Biophys J. 1999 Jul;77(1):189-203. PMID:10388749 doi:10.1016/S0006-3495(99)76881-5
↑ Kakizawa S, Yamazawa T, Chen Y, Ito A, Murayama T, Oyamada H, Kurebayashi N, Sato O, Watanabe M, Mori N, Oguchi K, Sakurai T, Takeshima H, Saito N, Iino M. Nitric oxide-induced calcium release via ryanodine receptors regulates neuronal function. EMBO J. 2011 Oct 28;31(2):417-28. doi: 10.1038/emboj.2011.386. PMID:22036948 doi:10.1038/emboj.2011.386
↑ Efremov RG, Leitner A, Aebersold R, Raunser S. Architecture and conformational switch mechanism of the ryanodine receptor. Nature. 2014 Dec 1. doi: 10.1038/nature13916. PMID:25470059 doi:http://dx.doi.org/10.1038/nature13916

1 Structural highlights
2 Function
3 Publication Abstract from PubMed
4 See Also
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/4uwa"

@@ Line 1: / Line 1: @@
 ==Structure of the ryanodine receptor at resolution of 6.1 A in closed state==
-<StructureSection load='4uwa' size='340' side='right' caption='[[4uwa]], [[Resolution|resolution]] 6.10&Aring;' scene=''>
+<StructureSection load='4uwa' size='340' side='right'caption='[[4uwa]], [[Resolution|resolution]] 6.10&Aring;' scene=''>
 == Structural highlights ==
 <table><tr><td colspan='2'>[[4uwa]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Oryctolagus_cuniculus Oryctolagus cuniculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4UWA OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4UWA FirstGlance]. <br>
@@ Line 19: / Line 19: @@
 </div>
 <div class="pdbe-citations 4uwa" style="background-color:#fffaf0;"></div>
+==See Also==
+*[[Ryanodine receptor|Ryanodine receptor]]
 == References ==
 <references/>
 __TOC__
 </StructureSection>
+[[Category: Large Structures]]
 [[Category: Oryctolagus cuniculus]]
 [[Category: Aebersold, R]]

4uwa

From Proteopedia

Revision as of 08:26, 18 December 2019

Structure of the ryanodine receptor at resolution of 6.1 A in closed state

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox