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==Conformational dynamics of exchange protein directly activated by cAMP==
==Conformational dynamics of exchange protein directly activated by cAMP==
<StructureSection load='4f7z' size='340' side='right' caption='[[4f7z]], [[Resolution|resolution]] 2.60&Aring;' scene=''>
<StructureSection load='4f7z' size='340' side='right'caption='[[4f7z]], [[Resolution|resolution]] 2.60&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[4f7z]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4F7Z OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4F7Z FirstGlance]. <br>
<table><tr><td colspan='2'>[[4f7z]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4F7Z OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4F7Z FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene></td></tr>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.6&#8491;</td></tr>
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">Rapgef4, Cgef2, Epac2 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10090 Mus musculus])</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</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=4f7z FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4f7z OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4f7z RCSB], [http://www.ebi.ac.uk/pdbsum/4f7z PDBsum]</span></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=4f7z FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4f7z OCA], [https://pdbe.org/4f7z PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4f7z RCSB], [https://www.ebi.ac.uk/pdbsum/4f7z PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4f7z ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
[[http://www.uniprot.org/uniprot/RPGF4_MOUSE RPGF4_MOUSE]] Guanine nucleotide exchange factor (GEF) for RAP1A, RAP1B and RAP2A small GTPases that is activated by binding cAMP. Seems not to activate RAB3A. Involved in cAMP-dependent, PKA-independent exocytosis through interaction with RIMS2.<ref>PMID:11056535</ref> 
[https://www.uniprot.org/uniprot/RPGF4_MOUSE RPGF4_MOUSE] Guanine nucleotide exchange factor (GEF) for RAP1A, RAP1B and RAP2A small GTPases that is activated by binding cAMP. Seems not to activate RAB3A. Involved in cAMP-dependent, PKA-independent exocytosis through interaction with RIMS2.<ref>PMID:11056535</ref>  
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Exchange proteins directly activated by cAMP (EPACs) are important allosteric regulators of cAMP-mediated signal transduction pathways. To understand the molecular mechanism of EPAC activation, we have combined site-directed mutagenesis, X-ray crystallography, and peptide amide hydrogen/deuterium exchange mass spectrometry (DXMS) to probe the structural and conformational dynamics of EPAC2-F435G, a constitutively active EPAC2 mutant. Our study demonstrates that conformational dynamics plays a critical role in cAMP-induced EPAC activation. A glycine mutation at 435 position shifts the equilibrium of conformational dynamics towards the extended active conformation.
 
Structural analyses of a constitutively active mutant of exchange protein directly activated by cAMP.,White MA, Li S, Tsalkova T, Mei FC, Liu T, Woods VL Jr, Cheng X PLoS One. 2012;7(11):e49932. doi: 10.1371/journal.pone.0049932. Epub 2012 Nov 26. PMID:23189173<ref>PMID:23189173</ref>
 
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
== References ==
== References ==
<references/>
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Large Structures]]
[[Category: Mus musculus]]
[[Category: Mus musculus]]
[[Category: Cheng, X]]
[[Category: Cheng X]]
[[Category: Liu, T]]
[[Category: Liu T]]
[[Category: Mei, F C]]
[[Category: Mei FC]]
[[Category: Tsalkova, T N]]
[[Category: Tsalkova TN]]
[[Category: White, M A]]
[[Category: White MA]]
[[Category: Woods, V L]]
[[Category: Woods VL]]
[[Category: Auto-inhibition]]
[[Category: Cdc25 homology domain]]
[[Category: Cyclic nucleotide]]
[[Category: Exchange factor]]
[[Category: Exocytosis]]
[[Category: Gef]]
[[Category: Regulation]]
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