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| | ==Beclin 2 CCD homodimer== | | ==Beclin 2 CCD homodimer== |
| - | <StructureSection load='5k7b' size='340' side='right' caption='[[5k7b]], [[Resolution|resolution]] 2.30Å' scene=''> | + | <StructureSection load='5k7b' size='340' side='right'caption='[[5k7b]], [[Resolution|resolution]] 2.30Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[5k7b]] is a 4 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=5K7B OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5K7B FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[5k7b]] is a 4 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=5K7B OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5K7B FirstGlance]. <br> |
| - | </td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">BECN2, BECN1L1, BECN1P1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</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]] 2.3Å</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=5k7b FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5k7b OCA], [http://pdbe.org/5k7b PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5k7b RCSB], [http://www.ebi.ac.uk/pdbsum/5k7b PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5k7b 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=5k7b FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5k7b OCA], [https://pdbe.org/5k7b PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5k7b RCSB], [https://www.ebi.ac.uk/pdbsum/5k7b PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5k7b ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/BECN2_HUMAN BECN2_HUMAN]] Involved in 2 distinct lysosomal degradation pathways: acts as a regulator of autophagy and as a regulator of G-protein coupled receptors turnover. Regulates degradation in lysosomes of a variety of G-protein coupled receptors via its interaction with GPRASP1/GASP1.<ref>PMID:23954414</ref> | + | [https://www.uniprot.org/uniprot/BECN2_HUMAN BECN2_HUMAN] Involved in 2 distinct lysosomal degradation pathways: acts as a regulator of autophagy and as a regulator of G-protein coupled receptors turnover. Regulates degradation in lysosomes of a variety of G-protein coupled receptors via its interaction with GPRASP1/GASP1.<ref>PMID:23954414</ref> |
| - | <div style="background-color:#fffaf0;">
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| - | == Publication Abstract from PubMed ==
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| - | ATG14 binding to BECN/Beclin homologs is essential for autophagy, a critical catabolic homeostasis pathway. Here we show that the alpha-helical, coiled-coil domain (CCD) of BECN2, a recently identified mammalian BECN1 paralog, forms an anti-parallel, curved homodimer with seven pairs of non-ideal packing interactions, while the BECN2 CCD and ATG14 CCD form a parallel, curved heterodimer stabilized by multiple, conserved polar interactions. Compared to BECN1, the BECN2 CCD forms a weaker homodimer, but binds more tightly to the ATG14 CCD. Mutation of non-ideal BECN2 interface residues to more ideal pairs improves homodimer self-association and thermal stability. Unlike BECN1, all BECN2 CCD mutants bind ATG14, although more weakly than wild-type. Thus, polar BECN2 CCD interface residues result in a metastable homodimer, facilitating dissociation; but enable better interactions with polar ATG14 residues stabilizing the BECN2:ATG14 heterodimer. These structure-based mechanistic differences in BECN1 and BECN2 homodimerization and heterodimerization likely dictate competitive ATG14 recruitment. This article is protected by copyright. All rights reserved.
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| - | BECN2 interacts with ATG14 through a metastable coiled-coil to mediate autophagy.,Su M, Li Y, Wyborny S, Neau D, Chakravarthy S, Levine B, Colbert CL, Sinha SC Protein Sci. 2017 Feb 20. doi: 10.1002/pro.3140. PMID:28218432<ref>PMID:28218432</ref>
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| - | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>
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| - | </div>
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| - | <div class="pdbe-citations 5k7b" style="background-color:#fffaf0;"></div>
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| | == References == | | == References == |
| | <references/> | | <references/> |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Human]] | + | [[Category: Homo sapiens]] |
| - | [[Category: Sinha, S]] | + | [[Category: Large Structures]] |
| - | [[Category: Su, M]] | + | [[Category: Sinha S]] |
| - | [[Category: Apoptosis]] | + | [[Category: Su M]] |
| - | [[Category: Autophagy]]
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| - | [[Category: Coiled-coil domain]]
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