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.

5gl1

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Revision as of 18:28, 6 March 2020

Structure of RyR1 in an open state

5gl1, resolution 5.70Å

Structural highlights

5gl1 is a 8 chain structure with sequence from European rabbit and Oryctolagus cuniculus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Related:	5gky, 3j8h, 5gkz, 5gl0
Gene:	FKBP12 (European rabbit)
Activity:	Peptidylprolyl isomerase, with EC number 5.2.1.8
Experimental data:	Check to display Experimental Data
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] [FKB1A_RABIT] Keeps in an inactive conformation TGFBR1, the TGF-beta type I serine/threonine kinase receptor, preventing TGF-beta receptor activation in absence of ligand. Recruites SMAD7 to ACVR1B which prevents the association of SMAD2 and SMAD3 with the activin receptor complex, thereby blocking the activin signal. May modulate the RYR1 calcium channel activity. PPIases accelerate the folding of proteins. It catalyzes the cis-trans isomerization of proline imidic peptide bonds in oligopeptides (By similarity).

Publication Abstract from PubMed

The ryanodine receptors (RyRs) are intracellular calcium channels responsible for rapid release of Ca(2+) from the sarcoplasmic/endoplasmic reticulum (SR/ER) to the cytoplasm, which is essential for the excitation-contraction (E-C) coupling of cardiac and skeletal muscles. The near-atomic resolution structure of closed RyR1 revealed the molecular details of this colossal channel, while the long-range allosteric gating mechanism awaits elucidation. Here, we report the cryo-EM structures of rabbit RyR1 in three closed conformations at about 4 A resolution and an open state at 5.7 A. Comparison of the closed RyR1 structures shows a breathing motion of the cytoplasmic platform, while the channel domain and its contiguous Central domain remain nearly unchanged. Comparison of the open and closed structures shows a dilation of the S6 tetrahelical bundle at the cytoplasmic gate that leads to channel opening. During the pore opening, the cytoplasmic "O-ring" motif of the channel domain and the U-motif of the Central domain exhibit coupled motion, while the Central domain undergoes domain-wise displacement. These structural analyses provide important insight into the E-C coupling in skeletal muscles and identify the Central domain as the transducer that couples the conformational changes of the cytoplasmic platform to the gating of the central pore.

The Central domain of RyR1 is the transducer for long-range allosteric gating of channel opening.,Bai XC, Yan Z, Wu J, Li Z, Yan N Cell Res. 2016 Sep;26(9):995-1006. doi: 10.1038/cr.2016.89. Epub 2016 Jul 29. PMID:27468892^[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
↑ Bai XC, Yan Z, Wu J, Li Z, Yan N. The Central domain of RyR1 is the transducer for long-range allosteric gating of channel opening. Cell Res. 2016 Sep;26(9):995-1006. doi: 10.1038/cr.2016.89. Epub 2016 Jul 29. PMID:27468892 doi:http://dx.doi.org/10.1038/cr.2016.89

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/5gl1"

@@ Line 1: / Line 1: @@
 ==Structure of RyR1 in an open state==
-<StructureSection load='5gl1' size='340' side='right'caption='[[5gl1]], [[Resolution|resolution]] 5.70&Aring;' scene=''>
+<SX load='5gl1' size='340' side='right' viewer='molstar' caption='[[5gl1]], [[Resolution|resolution]] 5.70&Aring;' scene=''>
 == Structural highlights ==
 <table><tr><td colspan='2'>[[5gl1]] is a 8 chain structure with sequence from [http://en.wikipedia.org/wiki/European_rabbit European rabbit] and [http://en.wikipedia.org/wiki/Oryctolagus_cuniculus Oryctolagus cuniculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5GL1 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5GL1 FirstGlance]. <br>
@@ Line 23: / Line 23: @@
 ==See Also==
-*[[Ryanodine receptor|Ryanodine receptor]]
+*[[Ryanodine receptor 3D structures|Ryanodine receptor 3D structures]]
 == References ==
 <references/>
 __TOC__
-</StructureSection>
+</SX>
 [[Category: European rabbit]]
 [[Category: Large Structures]]

5gl1

From Proteopedia

Revision as of 18:28, 6 March 2020

Structure of RyR1 in an open 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