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==Crystal Structure of a-COP in Complex with e-COP==
==Crystal Structure of a-COP in Complex with e-COP==
<StructureSection load='3mv2' size='340' side='right' caption='[[3mv2]], [[Resolution|resolution]] 2.90&Aring;' scene=''>
<StructureSection load='3mv2' size='340' side='right'caption='[[3mv2]], [[Resolution|resolution]] 2.90&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[3mv2]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/Atcc_18824 Atcc 18824]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3MV2 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3MV2 FirstGlance]. <br>
<table><tr><td colspan='2'>[[3mv2]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3MV2 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3MV2 FirstGlance]. <br>
</td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3mv3|3mv3]]</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]] 2.9&#8491;</td></tr>
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">COP1, D1578, RET1, SEC33, YDL145C ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=4932 ATCC 18824]), SEC28, YIL076W ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=4932 ATCC 18824])</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=3mv2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3mv2 OCA], [https://pdbe.org/3mv2 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3mv2 RCSB], [https://www.ebi.ac.uk/pdbsum/3mv2 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3mv2 ProSAT]</span></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=3mv2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3mv2 OCA], [http://pdbe.org/3mv2 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3mv2 RCSB], [http://www.ebi.ac.uk/pdbsum/3mv2 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3mv2 ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
[[http://www.uniprot.org/uniprot/COPA_YEAST COPA_YEAST]] The coatomer is a cytosolic protein complex that binds to dilysine motifs and reversibly associates with Golgi non-clathrin-coated vesicles, which further mediate biosynthetic protein transport from the ER, via the Golgi up to the trans Golgi network. Coatomer complex is required for budding from Golgi membranes, and is essential for the retrograde Golgi-to-ER transport of dilysine-tagged proteins.<ref>PMID:17101773</ref>  [[http://www.uniprot.org/uniprot/COPE_YEAST COPE_YEAST]] The coatomer is a cytosolic protein complex that binds to dilysine motifs and reversibly associates with Golgi non-clathrin-coated vesicles, which further mediate biosynthetic protein transport from the ER, via the Golgi up to the trans Golgi network. Coatomer complex is required for budding from Golgi membranes, and is essential for the retrograde Golgi-to-ER transport of dilysine-tagged proteins. In mammals, the coatomer can only be recruited by membranes associated to ADP-ribosylation factors (ARFs), which are small GTP-binding proteins; the complex also influences the Golgi structural integrity, as well as the processing, activity, and endocytic recycling of LDL receptors (By similarity).<ref>PMID:9463377</ref> <ref>PMID:17101773</ref>
[https://www.uniprot.org/uniprot/COPA_YEAST COPA_YEAST] The coatomer is a cytosolic protein complex that binds to dilysine motifs and reversibly associates with Golgi non-clathrin-coated vesicles, which further mediate biosynthetic protein transport from the ER, via the Golgi up to the trans Golgi network. Coatomer complex is required for budding from Golgi membranes, and is essential for the retrograde Golgi-to-ER transport of dilysine-tagged proteins.<ref>PMID:17101773</ref>  
== Evolutionary Conservation ==
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
Check<jmol>
   <jmolCheckbox>
   <jmolCheckbox>
     <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/mv/3mv2_consurf.spt"</scriptWhenChecked>
     <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/mv/3mv2_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>
     <text>to colour the structure by Evolutionary Conservation</text>
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</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=3mv2 ConSurf].
</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=3mv2 ConSurf].
<div style="clear:both"></div>
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The heptameric coatomer complex forms the protein shell of membrane-bound vesicles that are involved in transport from the Golgi to the endoplasmatic reticulum and in intraGolgi trafficking. The heptamer can be dissected into a heterotetrameric F-subcomplex, which displays similarities to the adapter complex of the "inner" coat in clathrin-coated vesicles, and a heterotrimeric B-subcomplex, which is believed to form an "outer" coat with a morphology distinct from that of clathrin-coated vesicles. We have determined the crystal structure of the complex between the C-terminal domain (CTD) of alpha-COP and full-length epsilon-COP, two components of the B-subcomplex, at a 2.9 A resolution. The alpha-COP(CTD) x epsilon-COP heterodimer forms a rod-shaped structure, in which epsilon-COP adopts a tetratricopeptide repeat (TPR) fold that deviates substantially from the canonical superhelical conformation. The alpha-COP CTD adopts a U-shaped architecture that complements the TPR fold of epsilon-COP. The epsilon-COP TPRs form a circular bracelet that wraps around a protruding beta-hairpin of the alpha-COP CTD, thus interlocking the two proteins. The alpha-COP(CTD) x epsilon-COP complex forms heterodimers in solution, and we demonstrate biochemically that the heterodimer directly interacts with the Dsl1 tethering complex. These data suggest that the heterodimer is exposed on COPI vesicles, while the remaining part of the B-subcomplex oligomerizes underneath into a cage.
Crystal structure of alpha-COP in complex with epsilon-COP provides insight into the architecture of the COPI vesicular coat.,Hsia KC, Hoelz A Proc Natl Acad Sci U S A. 2010 Jun 22;107(25):11271-6. Epub 2010 Jun 3. PMID:20534429<ref>PMID:20534429</ref>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 3mv2" style="background-color:#fffaf0;"></div>
== References ==
== References ==
<references/>
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Atcc 18824]]
[[Category: Large Structures]]
[[Category: Hoelz, A]]
[[Category: Saccharomyces cerevisiae]]
[[Category: Hsia, K C]]
[[Category: Hoelz A]]
[[Category: Protein transport]]
[[Category: Hsia KC]]
[[Category: Vesicular membrane coat coat protein complex i]]

Latest revision as of 10:26, 21 February 2024

Crystal Structure of a-COP in Complex with e-COP

3mv2, resolution 2.90Å

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