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| | ==Crystal structure of the globular domain of human calreticulin== | | ==Crystal structure of the globular domain of human calreticulin== |
| - | <StructureSection load='3pow' size='340' side='right' caption='[[3pow]], [[Resolution|resolution]] 1.55Å' scene=''> | + | <StructureSection load='3pow' size='340' side='right'caption='[[3pow]], [[Resolution|resolution]] 1.55Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[3pow]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3POW OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3POW FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[3pow]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3POW OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3POW FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</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]] 1.55Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3pos|3pos]]</td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">CALR, CRTC ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens])</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=3pow FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3pow OCA], [https://pdbe.org/3pow PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3pow RCSB], [https://www.ebi.ac.uk/pdbsum/3pow PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3pow 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=3pow FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3pow OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3pow RCSB], [http://www.ebi.ac.uk/pdbsum/3pow PDBsum]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/CALR_HUMAN CALR_HUMAN]] Calcium-binding chaperone that promotes folding, oligomeric assembly and quality control in the endoplasmic reticulum (ER) via the calreticulin/calnexin cycle. This lectin interacts transiently with almost all of the monoglucosylated glycoproteins that are synthesized in the ER. Interacts with the DNA-binding domain of NR3C1 and mediates its nuclear export. Involved in maternal gene expression regulation. May participate in oocyte maturation via the regulation of calcium homeostasis (By similarity).<ref>PMID:7876246</ref> <ref>PMID:11149926</ref> | + | [https://www.uniprot.org/uniprot/CALR_HUMAN CALR_HUMAN] Calcium-binding chaperone that promotes folding, oligomeric assembly and quality control in the endoplasmic reticulum (ER) via the calreticulin/calnexin cycle. This lectin interacts transiently with almost all of the monoglucosylated glycoproteins that are synthesized in the ER. Interacts with the DNA-binding domain of NR3C1 and mediates its nuclear export. Involved in maternal gene expression regulation. May participate in oocyte maturation via the regulation of calcium homeostasis (By similarity).<ref>PMID:7876246</ref> <ref>PMID:11149926</ref> |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> |
| | </div> | | </div> |
| | + | <div class="pdbe-citations 3pow" style="background-color:#fffaf0;"></div> |
| | | | |
| | ==See Also== | | ==See Also== |
| - | *[[Cytochrome P450|Cytochrome P450]] | + | *[[Calreticulin 3D structures|Calreticulin 3D structures]] |
| | + | *[[Cytochrome P450 3D structures|Cytochrome P450 3D structures]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
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| | </StructureSection> | | </StructureSection> |
| | [[Category: Homo sapiens]] | | [[Category: Homo sapiens]] |
| - | [[Category: Gaboriaud, C]] | + | [[Category: Large Structures]] |
| - | [[Category: Carbohydrate binding]] | + | [[Category: Gaboriaud C]] |
| - | [[Category: Chaperone]]
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| - | [[Category: Cnx/crt family]]
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| - | [[Category: Legume lectin fold]]
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| - | [[Category: Multi-compartmental]]
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| - | [[Category: Multi-functional]]
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| - | [[Category: Peptide binding]]
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| Structural highlights
Function
CALR_HUMAN Calcium-binding chaperone that promotes folding, oligomeric assembly and quality control in the endoplasmic reticulum (ER) via the calreticulin/calnexin cycle. This lectin interacts transiently with almost all of the monoglucosylated glycoproteins that are synthesized in the ER. Interacts with the DNA-binding domain of NR3C1 and mediates its nuclear export. Involved in maternal gene expression regulation. May participate in oocyte maturation via the regulation of calcium homeostasis (By similarity).[1] [2]
Publication Abstract from PubMed
In the endoplasmic reticulum, calreticulin acts as a chaperone and a Ca(2+)-signalling protein. At the cell surface, it mediates numerous important biological effects. The crystal structure of the human calreticulin globular domain was solved at 1.55 A resolution. Interactions of the flexible N-terminal extension with the edge of the lectin site are consistently observed, revealing a hitherto unidentified peptide-binding site. A calreticulin molecular zipper, observed in all crystal lattices, could further extend this site by creating a binding cavity lined by hydrophobic residues. These data thus provide a first structural insight into the lectin-independent binding properties of calreticulin and suggest new working hypotheses, including that of a multi-molecular mechanism.
X-ray structure of the human calreticulin globular domain reveals a Peptide-binding area and suggests a multi-molecular mechanism.,Chouquet A, Paidassi H, Ling WL, Frachet P, Houen G, Arlaud GJ, Gaboriaud C PLoS One. 2011 Mar 15;6(3):e17886. PMID:21423620[3]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Nauseef WM, McCormick SJ, Clark RA. Calreticulin functions as a molecular chaperone in the biosynthesis of myeloperoxidase. J Biol Chem. 1995 Mar 3;270(9):4741-7. PMID:7876246
- ↑ Holaska JM, Black BE, Love DC, Hanover JA, Leszyk J, Paschal BM. Calreticulin Is a receptor for nuclear export. J Cell Biol. 2001 Jan 8;152(1):127-40. PMID:11149926
- ↑ Chouquet A, Paidassi H, Ling WL, Frachet P, Houen G, Arlaud GJ, Gaboriaud C. X-ray structure of the human calreticulin globular domain reveals a Peptide-binding area and suggests a multi-molecular mechanism. PLoS One. 2011 Mar 15;6(3):e17886. PMID:21423620 doi:10.1371/journal.pone.0017886
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