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[[Image:1tbg.jpg|left|200px]]


{{Structure
==BETA-GAMMA DIMER OF THE HETEROTRIMERIC G-PROTEIN TRANSDUCIN==
|PDB= 1tbg |SIZE=350|CAPTION= <scene name='initialview01'>1tbg</scene>, resolution 2.1&Aring;
<StructureSection load='1tbg' size='340' side='right'caption='[[1tbg]], [[Resolution|resolution]] 2.10&Aring;' scene=''>
|SITE=  
== Structural highlights ==
|LIGAND=  
<table><tr><td colspan='2'>[[1tbg]] is a 8 chain structure with sequence from [https://en.wikipedia.org/wiki/Bos_taurus Bos taurus]. The October 2004 RCSB PDB [https://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/index.html Molecule of the Month] feature on ''G Proteins''  by David S. Goodsell is [https://dx.doi.org/10.2210/rcsb_pdb/mom_2004_10 10.2210/rcsb_pdb/mom_2004_10]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1TBG OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1TBG FirstGlance]. <br>
|ACTIVITY=  
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.1&#8491;</td></tr>
|GENE=  
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1tbg FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1tbg OCA], [https://pdbe.org/1tbg PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1tbg RCSB], [https://www.ebi.ac.uk/pdbsum/1tbg PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1tbg ProSAT]</span></td></tr>
}}
</table>
== Function ==
[https://www.uniprot.org/uniprot/GBB1_BOVIN 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.
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/tb/1tbg_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1tbg ConSurf].
<div style="clear:both"></div>


'''BETA-GAMMA DIMER OF THE HETEROTRIMERIC G-PROTEIN TRANSDUCIN'''
==See Also==
 
*[[Transducin 3D structures|Transducin 3D structures]]
 
__TOC__
==Overview==
</StructureSection>
Many signalling cascades use seven-helical transmembrane receptors coupled to heterotrimeric G proteins (G alpha beta gamma) to convert extracellular signals into intracellular responses. Upon nucleotide exchange catalysed by activated receptors, heterotrimers dissociate into GTP-bound G alpha subunits and G beta gamma dimers, either of which can modulate many downstream effectors. Here we use multiwavelength anomalous diffraction data to solve the crystal structure of the beta gamma dimer of the G protein transducin. The beta-subunit is primarily a seven-bladed beta-propeller that is partially encircled by an extended gamma-subunit. The beta-propeller, which contains seven structurally similar WD repeats, defines the stereochemistry of the WD repeat and the probable architecture of all WD-repeat-containing domains. The structure details interactions between G protein beta- and gamma-subunits and highlights regions implicated in effector modulation for the conserved family of G protein beta gamma dimers.
 
==About this Structure==
1TBG is a [[Protein complex]] structure of sequences from [http://en.wikipedia.org/wiki/Bos_taurus Bos taurus]. The following page contains interesting information on the relation of 1TBG with [[http://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/pdb58_1.html G Proteins]]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1TBG OCA].
 
==Reference==
Crystal structure of a G-protein beta gamma dimer at 2.1A resolution., Sondek J, Bohm A, Lambright DG, Hamm HE, Sigler PB, Nature. 1996 Jan 25;379(6563):369-74. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/8552196 8552196]
[[Category: Bos taurus]]
[[Category: Bos taurus]]
[[Category: G Proteins]]
[[Category: G Proteins]]
[[Category: Protein complex]]
[[Category: Large Structures]]
[[Category: Bohm, A.]]
[[Category: RCSB PDB Molecule of the Month]]
[[Category: Hamm, H E.]]
[[Category: Bohm A]]
[[Category: Lambright, D G.]]
[[Category: Hamm HE]]
[[Category: Sigler, P B.]]
[[Category: Lambright DG]]
[[Category: Sondek, J S.]]
[[Category: Sigler PB]]
[[Category: complex (gtp-binding/transducer)]]
[[Category: Sondek JS]]
[[Category: eye]]
[[Category: prenylation]]
[[Category: transducer]]
 
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 14:16:25 2008''

Latest revision as of 08:38, 14 February 2024

BETA-GAMMA DIMER OF THE HETEROTRIMERIC G-PROTEIN TRANSDUCIN

1tbg, resolution 2.10Å

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