1m2v

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(New page: 200px<br /><applet load="1m2v" size="450" color="white" frame="true" align="right" spinBox="true" caption="1m2v, resolution 2.75&Aring;" /> '''Crystal Structure of...)
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[[Image:1m2v.gif|left|200px]]<br /><applet load="1m2v" size="450" color="white" frame="true" align="right" spinBox="true"
 
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caption="1m2v, resolution 2.75&Aring;" />
 
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'''Crystal Structure of the yeast Sec23/24 heterodimer'''<br />
 
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==Overview==
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==Crystal Structure of the yeast Sec23/24 heterodimer==
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COPII-coated vesicles form on the endoplasmic reticulum by the stepwise, recruitment of three cytosolic components: Sar1-GTP to initiate coat, formation, Sec23/24 heterodimer to select SNARE and cargo molecules, and, Sec13/31 to induce coat polymerization and membrane deformation., Crystallographic analysis of the Saccharomyces cerevisiae Sec23/24-Sar1, complex reveals a bow-tie-shaped structure, 15 nm long, with a, membrane-proximal surface that is concave and positively charged to, conform to the size and acidic-phospholipid composition of the COPII, vesicle. Sec23 and Sar1 form a continuous surface stabilized by a, non-hydrolysable GTP analogue, and Sar1 has rearranged from the GDP, conformation to expose amino-terminal residues that will probably embed in, the bilayer. The GTPase-activating protein (GAP) activity of Sec23, involves an arginine side chain inserted into the Sar1 active site. These, observations establish the structural basis for GTP-dependent recruitment, of a vesicular coat complex, and for uncoating through coat-controlled GTP, hydrolysis.
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<StructureSection load='1m2v' size='340' side='right'caption='[[1m2v]], [[Resolution|resolution]] 2.75&Aring;' scene=''>
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== Structural highlights ==
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==About this Structure==
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<table><tr><td colspan='2'>[[1m2v]] is a 2 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=1M2V OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1M2V FirstGlance]. <br>
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1M2V is a [http://en.wikipedia.org/wiki/Protein_complex Protein complex] structure of sequences from [http://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae] with ZN as [http://en.wikipedia.org/wiki/ligand ligand]. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1M2V OCA].
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.75&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
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==Reference==
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1m2v FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1m2v OCA], [https://pdbe.org/1m2v PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1m2v RCSB], [https://www.ebi.ac.uk/pdbsum/1m2v PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1m2v ProSAT]</span></td></tr>
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Structure of the Sec23/24-Sar1 pre-budding complex of the COPII vesicle coat., Bi X, Corpina RA, Goldberg J, Nature. 2002 Sep 19;419(6904):271-7. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=12239560 12239560]
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</table>
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[[Category: Protein complex]]
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== Function ==
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[https://www.uniprot.org/uniprot/SEC23_YEAST SEC23_YEAST] Component of the coat protein complex II (COPII) which promotes the formation of transport vesicles from the endoplasmic reticulum (ER). The coat has two main functions, the physical deformation of the endoplasmic reticulum membrane into vesicles and the selection of cargo molecules. SEC23 interacts with BET3 in order to target TRAPPI complex to COPII involved in internalisation of plasma membrane proteins like the maltose transporter.<ref>PMID:2670558</ref> <ref>PMID:6996832</ref> <ref>PMID:7026045</ref> <ref>PMID:3293799</ref> <ref>PMID:3049622</ref> <ref>PMID:2188733</ref> <ref>PMID:1498369</ref> <ref>PMID:7925484</ref> <ref>PMID:8451644</ref> <ref>PMID:8548805</ref> <ref>PMID:8909535</ref> <ref>PMID:9427388</ref> <ref>PMID:9023343</ref> <ref>PMID:9624457</ref> <ref>PMID:9428766</ref> <ref>PMID:10198022</ref> <ref>PMID:11086000</ref> <ref>PMID:10720463</ref> <ref>PMID:12941276</ref> <ref>PMID:14627716</ref> <ref>PMID:16269340</ref> <ref>PMID:17287728</ref>
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/m2/1m2v_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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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=1m2v ConSurf].
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<div style="clear:both"></div>
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== References ==
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<references/>
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__TOC__
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</StructureSection>
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[[Category: Large Structures]]
[[Category: Saccharomyces cerevisiae]]
[[Category: Saccharomyces cerevisiae]]
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[[Category: Bi, X.]]
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[[Category: Bi X]]
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[[Category: Corpina, R.A.]]
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[[Category: Corpina RA]]
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[[Category: Goldberg, J.]]
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[[Category: Goldberg J]]
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[[Category: ZN]]
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[[Category: beta barrel]]
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[[Category: gelsolin domain]]
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[[Category: vwa domain]]
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[[Category: zinc-finger]]
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''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Tue Nov 20 21:06:11 2007''
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Current revision

Crystal Structure of the yeast Sec23/24 heterodimer

PDB ID 1m2v

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