1fqj
From Proteopedia
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| - | [[Image:1fqj.gif|left|200px]] | + | [[Image:1fqj.gif|left|200px]] |
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| - | '''CRYSTAL STRUCTURE OF THE HETEROTRIMERIC COMPLEX OF THE RGS DOMAIN OF RGS9, THE GAMMA SUBUNIT OF PHOSPHODIESTERASE AND THE GT/I1 CHIMERA ALPHA SUBUNIT [(RGS9)-(PDEGAMMA)-(GT/I1ALPHA)-(GDP)-(ALF4-)-(MG2+)]''' | + | {{Structure |
| + | |PDB= 1fqj |SIZE=350|CAPTION= <scene name='initialview01'>1fqj</scene>, resolution 2.02Å | ||
| + | |SITE= | ||
| + | |LIGAND= <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=ALF:TETRAFLUOROALUMINATE+ION'>ALF</scene> and <scene name='pdbligand=GDP:GUANOSINE-5'-DIPHOSPHATE'>GDP</scene> | ||
| + | |ACTIVITY= [http://en.wikipedia.org/wiki/3',5'-cyclic-nucleotide_phosphodiesterase 3',5'-cyclic-nucleotide phosphodiesterase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.1.4.17 3.1.4.17] | ||
| + | |GENE= | ||
| + | }} | ||
| + | |||
| + | '''CRYSTAL STRUCTURE OF THE HETEROTRIMERIC COMPLEX OF THE RGS DOMAIN OF RGS9, THE GAMMA SUBUNIT OF PHOSPHODIESTERASE AND THE GT/I1 CHIMERA ALPHA SUBUNIT [(RGS9)-(PDEGAMMA)-(GT/I1ALPHA)-(GDP)-(ALF4-)-(MG2+)]''' | ||
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==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
| - | 1FQJ is a [ | + | 1FQJ is a [[Protein complex]] structure of sequences from [http://en.wikipedia.org/wiki/Bos_taurus_and_rattus_norvegicus Bos taurus and rattus norvegicus] 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=1FQJ OCA]. |
==Reference== | ==Reference== | ||
| - | Structural determinants for regulation of phosphodiesterase by a G protein at 2.0 A., Slep KC, Kercher MA, He W, Cowan CW, Wensel TG, Sigler PB, Nature. 2001 Feb 22;409(6823):1071-7. PMID:[http:// | + | Structural determinants for regulation of phosphodiesterase by a G protein at 2.0 A., Slep KC, Kercher MA, He W, Cowan CW, Wensel TG, Sigler PB, Nature. 2001 Feb 22;409(6823):1071-7. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/11234020 11234020] |
[[Category: 3',5'-cyclic-nucleotide phosphodiesterase]] | [[Category: 3',5'-cyclic-nucleotide phosphodiesterase]] | ||
[[Category: Bos taurus]] | [[Category: Bos taurus]] | ||
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[[Category: phosphodiesterase]] | [[Category: phosphodiesterase]] | ||
[[Category: phototransduction]] | [[Category: phototransduction]] | ||
| - | [[Category: | + | [[Category: rg]] |
[[Category: rgs9]] | [[Category: rgs9]] | ||
[[Category: rod]] | [[Category: rod]] | ||
[[Category: transducin]] | [[Category: transducin]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 11:12:39 2008'' |
Revision as of 09:12, 20 March 2008
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| , resolution 2.02Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | , and | ||||||
| Activity: | 3',5'-cyclic-nucleotide phosphodiesterase, with EC number 3.1.4.17 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
CRYSTAL STRUCTURE OF THE HETEROTRIMERIC COMPLEX OF THE RGS DOMAIN OF RGS9, THE GAMMA SUBUNIT OF PHOSPHODIESTERASE AND THE GT/I1 CHIMERA ALPHA SUBUNIT [(RGS9)-(PDEGAMMA)-(GT/I1ALPHA)-(GDP)-(ALF4-)-(MG2+)]
Overview
A multitude of heptahelical receptors use heterotrimeric G proteins to transduce signals to specific effector target molecules. The G protein transducin, Gt, couples photon-activated rhodopsin with the effector cyclic GMP phosophodiesterase (PDE) in the vertebrate phototransduction cascade. The interactions of the Gt alpha-subunit (alpha(t)) with the inhibitory PDE gamma-subunit (PDEgamma) are central to effector activation, and also enhance visual recovery in cooperation with the GTPase-activating protein regulator of G-protein signalling (RGS)-9 (refs 1-3). Here we describe the crystal structure at 2.0 A of rod transducin alpha x GDP x AlF4- in complex with the effector molecule PDEgamma and the GTPase-activating protein RGS9. In addition, we present the independently solved crystal structures of the RGS9 RGS domain both alone and in complex with alpha(t/i1) x GDP x AlF4-. These structures reveal insights into effector activation, synergistic GTPase acceleration, RGS9 specificity and RGS activity. Effector binding to a nucleotide-dependent site on alpha(t) sequesters PDEgamma residues implicated in PDE inhibition, and potentiates recruitment of RGS9 for hydrolytic transition state stabilization and concomitant signal termination.
About this Structure
1FQJ is a Protein complex structure of sequences from Bos taurus and rattus norvegicus and Bos taurus. Full crystallographic information is available from OCA.
Reference
Structural determinants for regulation of phosphodiesterase by a G protein at 2.0 A., Slep KC, Kercher MA, He W, Cowan CW, Wensel TG, Sigler PB, Nature. 2001 Feb 22;409(6823):1071-7. PMID:11234020
Page seeded by OCA on Thu Mar 20 11:12:39 2008
Categories: 3',5'-cyclic-nucleotide phosphodiesterase | Bos taurus | Bos taurus and rattus norvegicus | Protein complex | Cowan, C W. | He, W. | Kercher, M A. | Sigler, P B. | Slep, K C. | Wensel, T G. | ALF | GDP | MG | Effector | G protein | Gap | Pdegamma | Phosphodiesterase | Phototransduction | Rg | Rgs9 | Rod | Transducin
