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6cmo

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Revision as of 06:41, 17 April 2019

Rhodopsin-Gi complex

Structural highlights

6cmo is a 6 chain structure with sequence from "bacillus_coli"_migula_1895 "bacillus coli" migula 1895, Bovin, Buffalo rat, Human and Synthetic construct sequences. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Gene:	RHO, OPN2 ("Bacillus coli" Migula 1895), GNAI1 (HUMAN), Gnb1 (Buffalo rat), GNG2 (BOVIN)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[GBG2_BOVIN] Guanine nucleotide-binding proteins (G proteins) are involved as a modulator or transducer in various transmembrane signaling systems. The beta and gamma chains are required for the GTPase activity, for replacement of GDP by GTP, and for G protein-effector interaction. [C562_ECOLX] Electron-transport protein of unknown function. [GBB1_RAT] Guanine nucleotide-binding proteins (G proteins) are involved as a modulator or transducer in various transmembrane signaling systems. The beta and gamma chains are required for the GTPase activity, for replacement of GDP by GTP, and for G protein-effector interaction. [GNAI1_HUMAN] Guanine nucleotide-binding proteins (G proteins) are involved as modulators or transducers in various transmembrane signaling systems. The G(i) proteins are involved in hormonal regulation of adenylate cyclase: they inhibit the cyclase in response to beta-adrenergic stimuli. The inactive GDP-bound form prevents the association of RGS14 with centrosomes and is required for the translocation of RGS14 from the cytoplasm to the plasma membrane. May play a role in cell division.^[1] ^[2]

Publication Abstract from PubMed

G-protein-coupled receptors comprise the largest family of mammalian transmembrane receptors. They mediate numerous cellular pathways by coupling with downstream signalling transducers, including the hetrotrimeric G proteins Gs (stimulatory) and Gi (inhibitory) and several arrestin proteins. The structural mechanisms that define how G-protein-coupled receptors selectively couple to a specific type of G protein or arrestin remain unknown. Here, using cryo-electron microscopy, we show that the major interactions between activated rhodopsin and Gi are mediated by the C-terminal helix of the Gi alpha-subunit, which is wedged into the cytoplasmic cavity of the transmembrane helix bundle and directly contacts the amino terminus of helix 8 of rhodopsin. Structural comparisons of inactive, Gi-bound and arrestin-bound forms of rhodopsin with inactive and Gs-bound forms of the beta2-adrenergic receptor provide a foundation to understand the unique structural signatures that are associated with the recognition of Gs, Gi and arrestin by activated G-protein-coupled receptors.

Cryo-EM structure of human rhodopsin bound to an inhibitory G protein.,Kang Y, Kuybeda O, de Waal PW, Mukherjee S, Van Eps N, Dutka P, Zhou XE, Bartesaghi A, Erramilli S, Morizumi T, Gu X, Yin Y, Liu P, Jiang Y, Meng X, Zhao G, Melcher K, Ernst OP, Kossiakoff AA, Subramaniam S, Xu HE Nature. 2018 Jun;558(7711):553-558. doi: 10.1038/s41586-018-0215-y. Epub 2018 Jun, 13. PMID:29899450^[3]

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

References

↑ Cho H, Kehrl JH. Localization of Gi alpha proteins in the centrosomes and at the midbody: implication for their role in cell division. J Cell Biol. 2007 Jul 16;178(2):245-55. PMID:17635935 doi:10.1083/jcb.200604114
↑ Johnston CA, Siderovski DP. Structural basis for nucleotide exchange on G alpha i subunits and receptor coupling specificity. Proc Natl Acad Sci U S A. 2007 Feb 6;104(6):2001-6. Epub 2007 Jan 30. PMID:17264214
↑ Kang Y, Kuybeda O, de Waal PW, Mukherjee S, Van Eps N, Dutka P, Zhou XE, Bartesaghi A, Erramilli S, Morizumi T, Gu X, Yin Y, Liu P, Jiang Y, Meng X, Zhao G, Melcher K, Ernst OP, Kossiakoff AA, Subramaniam S, Xu HE. Cryo-EM structure of human rhodopsin bound to an inhibitory G protein. Nature. 2018 Jun;558(7711):553-558. doi: 10.1038/s41586-018-0215-y. Epub 2018 Jun, 13. PMID:29899450 doi:http://dx.doi.org/10.1038/s41586-018-0215-y

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/6cmo"

@@ Line 1: / Line 1: @@
 ==Rhodopsin-Gi complex==
-<StructureSection load='6cmo' size='340' side='right' caption='[[6cmo]], [[Resolution|resolution]] 4.50&Aring;' scene=''>
+<StructureSection load='6cmo' size='340' side='right'caption='[[6cmo]], [[Resolution|resolution]] 4.50&Aring;' scene=''>
 == Structural highlights ==
 <table><tr><td colspan='2'>[[6cmo]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacillus_coli"_migula_1895 "bacillus coli" migula 1895], [http://en.wikipedia.org/wiki/Bovin Bovin], [http://en.wikipedia.org/wiki/Buffalo_rat Buffalo rat], [http://en.wikipedia.org/wiki/Human Human] and [http://en.wikipedia.org/wiki/Synthetic_construct_sequences Synthetic construct sequences]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6CMO OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6CMO FirstGlance]. <br>
@@ Line 27: / Line 27: @@
 [[Category: Buffalo rat]]
 [[Category: Human]]
+[[Category: Large Structures]]
 [[Category: Synthetic construct sequences]]
 [[Category: Bartesaghi, A]]

6cmo

From Proteopedia

Revision as of 06:41, 17 April 2019

Rhodopsin-Gi complex

Structural highlights

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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