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| | ==The structural analysis of Sil1-Bip complex reveals the mechanism for Sil1 to function as a novel nucleotide exchange factor== | | ==The structural analysis of Sil1-Bip complex reveals the mechanism for Sil1 to function as a novel nucleotide exchange factor== |
| - | <StructureSection load='3qml' size='340' side='right' caption='[[3qml]], [[Resolution|resolution]] 2.31Å' scene=''> | + | <StructureSection load='3qml' size='340' side='right'caption='[[3qml]], [[Resolution|resolution]] 2.31Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[3qml]] is a 4 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=3QML OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3QML FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[3qml]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Atcc_18824 Atcc 18824]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3QML OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3QML FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene></td></tr> | + | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene></td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3qfu|3qfu]], [[3qfp|3qfp]]</td></tr> | + | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[3qfu|3qfu]], [[3qfp|3qfp]]</div></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">KAR2, GRP78, SSD1, YJL034W, J1248 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=4932 ATCC 18824]), SIL1, PER100, SLS1, YOL031C ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=4932 ATCC 18824])</td></tr> | + | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">KAR2, GRP78, SSD1, YJL034W, J1248 ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=4932 ATCC 18824]), SIL1, PER100, SLS1, YOL031C ([https://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'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3qml FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3qml OCA], [http://pdbe.org/3qml PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3qml RCSB], [http://www.ebi.ac.uk/pdbsum/3qml PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3qml 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=3qml FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3qml OCA], [https://pdbe.org/3qml PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3qml RCSB], [https://www.ebi.ac.uk/pdbsum/3qml PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3qml ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/GRP78_YEAST GRP78_YEAST]] Probably plays a role in facilitating the assembly of multimeric protein complexes inside the ER. Is required for secretory polypeptide translocation. May physically associate with SEC63 protein in the endoplasmic reticulum and this interaction may be regulated by ATP hydrolysis.<ref>PMID:16002399</ref> [[http://www.uniprot.org/uniprot/SIL1_YEAST SIL1_YEAST]] Required for protein translocation and folding in the endoplasmic reticulum (ER). Functions as a nucleotide exchange factor for the ER lumenal chaperone KAR2.<ref>PMID:10958688</ref> <ref>PMID:11101517</ref> <ref>PMID:14704430</ref> | + | [[https://www.uniprot.org/uniprot/GRP78_YEAST GRP78_YEAST]] Probably plays a role in facilitating the assembly of multimeric protein complexes inside the ER. Is required for secretory polypeptide translocation. May physically associate with SEC63 protein in the endoplasmic reticulum and this interaction may be regulated by ATP hydrolysis.<ref>PMID:16002399</ref> [[https://www.uniprot.org/uniprot/SIL1_YEAST SIL1_YEAST]] Required for protein translocation and folding in the endoplasmic reticulum (ER). Functions as a nucleotide exchange factor for the ER lumenal chaperone KAR2.<ref>PMID:10958688</ref> <ref>PMID:11101517</ref> <ref>PMID:14704430</ref> |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | </StructureSection> | | </StructureSection> |
| | [[Category: Atcc 18824]] | | [[Category: Atcc 18824]] |
| | + | [[Category: Large Structures]] |
| | [[Category: Li, J Z]] | | [[Category: Li, J Z]] |
| | [[Category: Sha, B D]] | | [[Category: Sha, B D]] |
| Structural highlights
3qml is a 4 chain structure with sequence from Atcc 18824. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
| | Ligands: | , |
| Related: | |
| Gene: | KAR2, GRP78, SSD1, YJL034W, J1248 (ATCC 18824), SIL1, PER100, SLS1, YOL031C (ATCC 18824) |
| Resources: | FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT |
Function
[GRP78_YEAST] Probably plays a role in facilitating the assembly of multimeric protein complexes inside the ER. Is required for secretory polypeptide translocation. May physically associate with SEC63 protein in the endoplasmic reticulum and this interaction may be regulated by ATP hydrolysis.[1] [SIL1_YEAST] Required for protein translocation and folding in the endoplasmic reticulum (ER). Functions as a nucleotide exchange factor for the ER lumenal chaperone KAR2.[2] [3] [4]
Publication Abstract from PubMed
Sil1 functions as a nucleotide exchange factor (NEF) for Bip in eukaryotic cells. In order to understand how Sil1 functions as a NEF, we analyzed the crystal structure of the yeast Bip-Sil1 complex at a resolution of 2.3A. In the complex, the Sil1 molecule acts as a "molecular clamp" which binds to the IIb lobe of the Bip ATPase domain. Sil1 binding causes lobe IIb to rotate ~13.5 degrees away from the ADP-binding pocket and lobe Ib to rotate in the opposite direction for ~3.7 degrees . These conformational changes in Bip open up the nucleotide-binding pocket in the ATPase domain and simultaneously disrupt the hydrogen bonds between Bip and bound ADP, thus providing a mechanism for ADP release. We also demonstrate that Sil1 mutations that disrupt binding to the Bip ATPase domain abolish Sil1's ability to stimulate Bip ATPase activity.
Structural analysis of the Sil1-Bip complex reveals how Sil1 functions as a nucleotide exchange factor.,Yan M, Li J, Sha B Biochem J. 2011 Jun 15. PMID:21675960[5]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Kimura T, Hosoda Y, Sato Y, Kitamura Y, Ikeda T, Horibe T, Kikuchi M. Interactions among yeast protein-disulfide isomerase proteins and endoplasmic reticulum chaperone proteins influence their activities. J Biol Chem. 2005 Sep 9;280(36):31438-41. Epub 2005 Jul 7. PMID:16002399 doi:http://dx.doi.org/10.1074/jbc.M503377200
- ↑ Kabani M, Beckerich JM, Gaillardin C. Sls1p stimulates Sec63p-mediated activation of Kar2p in a conformation-dependent manner in the yeast endoplasmic reticulum. Mol Cell Biol. 2000 Sep;20(18):6923-34. PMID:10958688
- ↑ Tyson JR, Stirling CJ. LHS1 and SIL1 provide a lumenal function that is essential for protein translocation into the endoplasmic reticulum. EMBO J. 2000 Dec 1;19(23):6440-52. PMID:11101517 doi:http://dx.doi.org/10.1093/emboj/19.23.6440
- ↑ Steel GJ, Fullerton DM, Tyson JR, Stirling CJ. Coordinated activation of Hsp70 chaperones. Science. 2004 Jan 2;303(5654):98-101. PMID:14704430 doi:http://dx.doi.org/10.1126/science.1092287
- ↑ Yan M, Li J, Sha B. Structural analysis of the Sil1-Bip complex reveals how Sil1 functions as a nucleotide exchange factor. Biochem J. 2011 Jun 15. PMID:21675960 doi:10.1042/BJ20110500
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