1f6b: Difference between revisions

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<StructureSection load='1f6b' size='340' side='right'caption='[[1f6b]], [[Resolution|resolution]] 1.70&Aring;' scene=''>
<StructureSection load='1f6b' size='340' side='right'caption='[[1f6b]], [[Resolution|resolution]] 1.70&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[1f6b]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Cho_cell_lines Cho cell lines]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1F6B OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1F6B FirstGlance]. <br>
<table><tr><td colspan='2'>[[1f6b]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Cricetulus_griseus Cricetulus griseus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1F6B OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1F6B FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GDP:GUANOSINE-5-DIPHOSPHATE'>GDP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</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]] 1.7&#8491;</td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[1hur|1hur]], [[1rrg|1rrg]], [[1q21|1q21]]</div></td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GDP:GUANOSINE-5-DIPHOSPHATE'>GDP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></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=1f6b FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1f6b OCA], [https://pdbe.org/1f6b PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1f6b RCSB], [https://www.ebi.ac.uk/pdbsum/1f6b PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1f6b ProSAT]</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=1f6b FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1f6b OCA], [https://pdbe.org/1f6b PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1f6b RCSB], [https://www.ebi.ac.uk/pdbsum/1f6b PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1f6b ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
[[https://www.uniprot.org/uniprot/SAR1B_CRIGR SAR1B_CRIGR]] Involved in transport from the endoplasmic reticulum to the Golgi apparatus. Activated by the guanine nucleotide exchange factor PREB. Involved in the selection of the protein cargo and the assembly of the COPII coat complex.<ref>PMID:8138575</ref> <ref>PMID:11149932</ref>
[https://www.uniprot.org/uniprot/SAR1B_CRIGR SAR1B_CRIGR] Involved in transport from the endoplasmic reticulum to the Golgi apparatus. Activated by the guanine nucleotide exchange factor PREB. Involved in the selection of the protein cargo and the assembly of the COPII coat complex.<ref>PMID:8138575</ref> <ref>PMID:11149932</ref>  
== Evolutionary Conservation ==
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
[[Image:Consurf_key_small.gif|200px|right]]
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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=1f6b 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=1f6b ConSurf].
<div style="clear:both"></div>
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The Sar1 GTPase is an essential component of COPII vesicle coats involved in export of cargo from the ER. We report the 1.7-A structure of Sar1 and find that consistent with the sequence divergence of Sar1 from Arf family GTPases, Sar1 is structurally distinct. In particular, we show that the Sar1 NH2 terminus contains two regions: an NH2-terminal extension containing an evolutionary conserved hydrophobic motif that facilitates membrane recruitment and activation by the mammalian Sec12 guanine nucleotide exchange factor, and an alpha1' amphipathic helix that contributes to interaction with the Sec23/24 complex that is responsible for cargo selection during ER export. We propose that the hydrophobic Sar1 NH2-terminal activation/recruitment motif, in conjunction with the alpha1' helix, mediates the initial steps in COPII coat assembly for export from the ER.
Crystal structure of Sar1-GDP at 1.7 A resolution and the role of the NH2 terminus in ER export.,Huang M, Weissman JT, Beraud-Dufour S, Luan P, Wang C, Chen W, Aridor M, Wilson IA, Balch WE J Cell Biol. 2001 Dec 10;155(6):937-48. Epub 2001 Dec 10. PMID:11739406<ref>PMID:11739406</ref>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 1f6b" style="background-color:#fffaf0;"></div>
== References ==
== References ==
<references/>
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Cho cell lines]]
[[Category: Cricetulus griseus]]
[[Category: Large Structures]]
[[Category: Large Structures]]
[[Category: Balch, W E]]
[[Category: Balch WE]]
[[Category: Huang, M]]
[[Category: Huang M]]
[[Category: Wilson, I A]]
[[Category: Wilson IA]]
[[Category: Gtpase]]
[[Category: Mg-containing complex]]
[[Category: N-terminal helix]]
[[Category: Protein transport]]

Latest revision as of 07:11, 7 February 2024

CRYSTAL STRUCTURE OF SAR1-GDP COMPLEX

1f6b, resolution 1.70Å

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