6oy9

From Proteopedia

(Difference between revisions)

Revision as of 09:10, 27 November 2019

Structure of the Rhodopsin-Transducin Complex

Structural highlights

6oy9 is a 4 chain structure with sequence from Bovin and Bos taurus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[OPSD_BOVIN] Photoreceptor required for image-forming vision at low light intensity. Required for photoreceptor cell viability after birth. Light-induced isomerization of 11-cis to all-trans retinal triggers a conformational change leading to G-protein activation and release of all-trans retinal (By similarity).^[1] ^[2] [GNAT1_BOVIN] Guanine nucleotide-binding proteins (G proteins) are involved as modulators or transducers in various transmembrane signaling systems. Transducin is an amplifier and one of the transducers of a visual impulse that performs the coupling between rhodopsin and cGMP-phosphodiesterase. [GBB1_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.

Publication Abstract from PubMed

Rhodopsin (Rho), a prototypical G-protein-coupled receptor (GPCR) in vertebrate vision, activates the G-protein transducin (GT) by catalyzing GDP-GTP exchange on its alpha subunit (GalphaT). To elucidate the determinants of GT coupling and activation, we obtained cryo-EM structures of a fully functional, light-activated Rho-GT complex in the presence and absence of a G-protein-stabilizing nanobody. The structures illustrate how GT overcomes its low basal activity by engaging activated Rho in a conformation distinct from other GPCR-G-protein complexes. Moreover, the nanobody-free structures reveal native conformations of G-protein components and capture three distinct conformers showing the GalphaT helical domain (alphaHD) contacting the Gbetagamma subunits. These findings uncover the molecular underpinnings of G-protein activation by visual rhodopsin and shed new light on the role played by Gbetagamma during receptor-catalyzed nucleotide exchange.

Structures of the Rhodopsin-Transducin Complex: Insights into G-Protein Activation.,Gao Y, Hu H, Ramachandran S, Erickson JW, Cerione RA, Skiniotis G Mol Cell. 2019 Jun 24. pii: S1097-2765(19)30440-X. doi:, 10.1016/j.molcel.2019.06.007. PMID:31300275^[3]

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

References

↑ Nakamichi H, Okada T. Local peptide movement in the photoreaction intermediate of rhodopsin. Proc Natl Acad Sci U S A. 2006 Aug 22;103(34):12729-34. Epub 2006 Aug 14. PMID:16908857
↑ Salom D, Lodowski DT, Stenkamp RE, Le Trong I, Golczak M, Jastrzebska B, Harris T, Ballesteros JA, Palczewski K. Crystal structure of a photoactivated deprotonated intermediate of rhodopsin. Proc Natl Acad Sci U S A. 2006 Oct 31;103(44):16123-8. Epub 2006 Oct 23. PMID:17060607
↑ Gao Y, Hu H, Ramachandran S, Erickson JW, Cerione RA, Skiniotis G. Structures of the Rhodopsin-Transducin Complex: Insights into G-Protein Activation. Mol Cell. 2019 Jun 24. pii: S1097-2765(19)30440-X. doi:, 10.1016/j.molcel.2019.06.007. PMID:31300275 doi:http://dx.doi.org/10.1016/j.molcel.2019.06.007

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/6oy9"

@@ Line 3: / Line 3: @@
 <StructureSection load='6oy9' size='340' side='right'caption='[[6oy9]], [[Resolution|resolution]] 3.90&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[6oy9]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/ ] and [http://en.wikipedia.org/wiki/Bos_taurus Bos taurus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6OY9 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6OY9 FirstGlance]. <br>
+<table><tr><td colspan='2'>[[6oy9]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Bovin Bovin] and [http://en.wikipedia.org/wiki/Bos_taurus Bos taurus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6OY9 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6OY9 FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=RET:RETINAL'>RET</scene></td></tr>
 <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6oy9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6oy9 OCA], [http://pdbe.org/6oy9 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6oy9 RCSB], [http://www.ebi.ac.uk/pdbsum/6oy9 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6oy9 ProSAT]</span></td></tr>
@@ Line 23: / Line 23: @@
 </StructureSection>
 [[Category: Bos taurus]]
+[[Category: Bovin]]
 [[Category: Large Structures]]
 [[Category: Cerione, R A]]

6oy9

From Proteopedia

Revision as of 09:10, 27 November 2019

Structure of the Rhodopsin-Transducin Complex

Structural highlights

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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