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| | ==Human alphaB crystallin core domain in complex with C-terminal peptide== | | ==Human alphaB crystallin core domain in complex with C-terminal peptide== |
| - | <StructureSection load='4m5s' size='340' side='right' caption='[[4m5s]], [[Resolution|resolution]] 1.37Å' scene=''> | + | <StructureSection load='4m5s' size='340' side='right'caption='[[4m5s]], [[Resolution|resolution]] 1.37Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[4m5s]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4M5S OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4M5S FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[4m5s]] is a 2 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=4M5S OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4M5S FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=SIN:SUCCINIC+ACID'>SIN</scene></td></tr> | + | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SIN:SUCCINIC+ACID'>SIN</scene></td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4m5t|4m5t]]</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=4m5s FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4m5s OCA], [https://pdbe.org/4m5s PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4m5s RCSB], [https://www.ebi.ac.uk/pdbsum/4m5s PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4m5s ProSAT]</span></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">CRYA2, CRYAB ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</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=4m5s FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4m5s OCA], [http://pdbe.org/4m5s PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4m5s RCSB], [http://www.ebi.ac.uk/pdbsum/4m5s PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4m5s ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Disease == | | == Disease == |
| - | [[http://www.uniprot.org/uniprot/CRYAB_HUMAN CRYAB_HUMAN]] Posterior polar cataract;Alpha-crystallinopathy;Zonular cataract;Familial isolated dilated cardiomyopathy;Fatal infantile hypertonic myofibrillar myopathy. The disease is caused by mutations affecting the gene represented in this entry. The disease is caused by mutations affecting the gene represented in this entry. The disease is caused by mutations affecting the gene represented in this entry. The disease is caused by mutations affecting the gene represented in this entry. | + | [https://www.uniprot.org/uniprot/CRYAB_HUMAN CRYAB_HUMAN] Posterior polar cataract;Alpha-crystallinopathy;Zonular cataract;Familial isolated dilated cardiomyopathy;Fatal infantile hypertonic myofibrillar myopathy. The disease is caused by mutations affecting the gene represented in this entry. The disease is caused by mutations affecting the gene represented in this entry. The disease is caused by mutations affecting the gene represented in this entry. The disease is caused by mutations affecting the gene represented in this entry. |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/CRYAB_HUMAN CRYAB_HUMAN]] May contribute to the transparency and refractive index of the lens. Has chaperone-like activity, preventing aggregation of various proteins under a wide range of stress conditions. | + | [https://www.uniprot.org/uniprot/CRYAB_HUMAN CRYAB_HUMAN] May contribute to the transparency and refractive index of the lens. Has chaperone-like activity, preventing aggregation of various proteins under a wide range of stress conditions. |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | </div> | | </div> |
| | <div class="pdbe-citations 4m5s" style="background-color:#fffaf0;"></div> | | <div class="pdbe-citations 4m5s" style="background-color:#fffaf0;"></div> |
| | + | |
| | + | ==See Also== |
| | + | *[[Crystallin 3D structures|Crystallin 3D structures]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Human]] | + | [[Category: Homo sapiens]] |
| - | [[Category: Cascio, D]] | + | [[Category: Large Structures]] |
| - | [[Category: Eisenberg, D]] | + | [[Category: Cascio D]] |
| - | [[Category: Laganowsky, A]] | + | [[Category: Eisenberg D]] |
| - | [[Category: Sawaya, M R]] | + | [[Category: Laganowsky A]] |
| - | [[Category: Amyloid]] | + | [[Category: Sawaya MR]] |
| - | [[Category: Chaperone]]
| + | |
| - | [[Category: Small heat shock protein]]
| + | |
| Structural highlights
Disease
CRYAB_HUMAN Posterior polar cataract;Alpha-crystallinopathy;Zonular cataract;Familial isolated dilated cardiomyopathy;Fatal infantile hypertonic myofibrillar myopathy. The disease is caused by mutations affecting the gene represented in this entry. The disease is caused by mutations affecting the gene represented in this entry. The disease is caused by mutations affecting the gene represented in this entry. The disease is caused by mutations affecting the gene represented in this entry.
Function
CRYAB_HUMAN May contribute to the transparency and refractive index of the lens. Has chaperone-like activity, preventing aggregation of various proteins under a wide range of stress conditions.
Publication Abstract from PubMed
Mammalian small heat-shock proteins (sHSPs) are molecular chaperones that form polydisperse and dynamic complexes with target proteins, serving as a first line of defense in preventing their aggregation into either amorphous deposits or amyloid fibrils. Their apparently broad target specificity makes sHSPs attractive for investigating ways to tackle disorders of protein aggregation. The two most abundant sHSPs in human tissue are alphaB-crystallin (ABC) and HSP27; here we present high-resolution structures of their core domains (cABC, cHSP27), each in complex with a segment of their respective C-terminal regions. We find that both truncated proteins dimerize, and although this interface is labile in the case of cABC, in cHSP27 the dimer can be cross-linked by an intermonomer disulfide linkage. Using cHSP27 as a template, we have designed an equivalently locked cABC to enable us to investigate the functional role played by oligomerization, disordered N and C termini, subunit exchange, and variable dimer interfaces in ABC. We have assayed the ability of the different forms of ABC to prevent protein aggregation in vitro. Remarkably, we find that cABC has chaperone activity comparable to that of the full-length protein, even when monomer dissociation is restricted through disulfide linkage. Furthermore, cABC is a potent inhibitor of amyloid fibril formation and, by slowing the rate of its aggregation, effectively reduces the toxicity of amyloid-beta peptide to cells. Overall we present a small chaperone unit together with its atomic coordinates that potentially enables the rational design of more effective chaperones and amyloid inhibitors.
The structured core domain of alphaB-crystallin can prevent amyloid fibrillation and associated toxicity.,Hochberg GK, Ecroyd H, Liu C, Cox D, Cascio D, Sawaya MR, Collier MP, Stroud J, Carver JA, Baldwin AJ, Robinson CV, Eisenberg DS, Benesch JL, Laganowsky A Proc Natl Acad Sci U S A. 2014 Apr 22;111(16):E1562-70. doi:, 10.1073/pnas.1322673111. Epub 2014 Apr 7. PMID:24711386[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Hochberg GK, Ecroyd H, Liu C, Cox D, Cascio D, Sawaya MR, Collier MP, Stroud J, Carver JA, Baldwin AJ, Robinson CV, Eisenberg DS, Benesch JL, Laganowsky A. The structured core domain of alphaB-crystallin can prevent amyloid fibrillation and associated toxicity. Proc Natl Acad Sci U S A. 2014 Apr 22;111(16):E1562-70. doi:, 10.1073/pnas.1322673111. Epub 2014 Apr 7. PMID:24711386 doi:http://dx.doi.org/10.1073/pnas.1322673111
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