1jad

<table><tr><td colspan='2'>[[1jad]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Melga Melga]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1JAD OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1JAD FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>

<tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene></td></tr>

<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/Phosphoinositide_phospholipase_C Phosphoinositide phospholipase C], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.1.4.11 3.1.4.11] </span></td></tr>

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== Publication Abstract from PubMed ==

GTP-bound subunits of the Gq family of G alpha subunits directly activate phospholipase C-beta (PLC-beta) isozymes to produce the second messengers inositol 1,4,5-trisphosphate and diacylglycerol. PLC-betas are GTPase activating proteins (GAPs) that also promote the formation of GDP-bound, inactive G beta subunits. Both phospholipase activation by G alpha-GTP subunits and GAP activity require a C-terminal region unique to PLC-beta isozymes. The crystal structure of the C-terminal region from an avian PLC-beta, determined at 2.4 A resolution, reveals a novel fold composed almost entirely of three long helices forming a coiled-coil that dimerizes along its long axis in an antiparallel orientation. The dimer interface is extensive ( approximately 3,200 A(2)), and, based on gel exclusion chromatography, full length PLC-betas are dimeric, indicating that PLC-betas likely function as dimers. Sequence conservation, mutational data and molecular modeling show that an electrostatically positive surface of the dimer contains the major determinants for binding G beta q. Effector dimerization, as highlighted by PLC-betas, provides a viable mechanism for regulating signaling cascades linked to heterotrimeric G proteins.

A unique fold of phospholipase C-beta mediates dimerization and interaction with G alpha q.,Singer AU, Waldo GL, Harden TK, Sondek J Nat Struct Biol. 2002 Jan;9(1):32-6. PMID:11753430<ref>PMID:11753430</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>

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== References ==

<references/>

[[Category: Melga]]

[[Category: Phosphoinositide phospholipase C]]

[[Category: Harden, T K]]

[[Category: Singer, A U]]

[[Category: Sondek, J]]

[[Category: Waldo, G L]]

[[Category: Hydrolase]]