3mv2

From Proteopedia

(Difference between revisions)

Revision as of 10:51, 25 December 2014

Crystal Structure of a-COP in Complex with e-COP

Structural highlights

3mv2 is a 6 chain structure with sequence from Saccharomyces cerevisiae. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Related:	3mv3
Gene:	COP1, D1578, RET1, SEC33, YDL145C (Saccharomyces cerevisiae), SEC28, YIL076W (Saccharomyces cerevisiae)
Resources:	FirstGlance, OCA, RCSB, PDBsum

Function

[COPA_YEAST] The coatomer is a cytosolic protein complex that binds to dilysine motifs and reversibly associates with Golgi non-clathrin-coated vesicles, which further mediate biosynthetic protein transport from the ER, via the Golgi up to the trans Golgi network. Coatomer complex is required for budding from Golgi membranes, and is essential for the retrograde Golgi-to-ER transport of dilysine-tagged proteins.^[1] [COPE_YEAST] The coatomer is a cytosolic protein complex that binds to dilysine motifs and reversibly associates with Golgi non-clathrin-coated vesicles, which further mediate biosynthetic protein transport from the ER, via the Golgi up to the trans Golgi network. Coatomer complex is required for budding from Golgi membranes, and is essential for the retrograde Golgi-to-ER transport of dilysine-tagged proteins. In mammals, the coatomer can only be recruited by membranes associated to ADP-ribosylation factors (ARFs), which are small GTP-binding proteins; the complex also influences the Golgi structural integrity, as well as the processing, activity, and endocytic recycling of LDL receptors (By similarity).^[2] ^[3]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

The heptameric coatomer complex forms the protein shell of membrane-bound vesicles that are involved in transport from the Golgi to the endoplasmatic reticulum and in intraGolgi trafficking. The heptamer can be dissected into a heterotetrameric F-subcomplex, which displays similarities to the adapter complex of the "inner" coat in clathrin-coated vesicles, and a heterotrimeric B-subcomplex, which is believed to form an "outer" coat with a morphology distinct from that of clathrin-coated vesicles. We have determined the crystal structure of the complex between the C-terminal domain (CTD) of alpha-COP and full-length epsilon-COP, two components of the B-subcomplex, at a 2.9 A resolution. The alpha-COP(CTD) x epsilon-COP heterodimer forms a rod-shaped structure, in which epsilon-COP adopts a tetratricopeptide repeat (TPR) fold that deviates substantially from the canonical superhelical conformation. The alpha-COP CTD adopts a U-shaped architecture that complements the TPR fold of epsilon-COP. The epsilon-COP TPRs form a circular bracelet that wraps around a protruding beta-hairpin of the alpha-COP CTD, thus interlocking the two proteins. The alpha-COP(CTD) x epsilon-COP complex forms heterodimers in solution, and we demonstrate biochemically that the heterodimer directly interacts with the Dsl1 tethering complex. These data suggest that the heterodimer is exposed on COPI vesicles, while the remaining part of the B-subcomplex oligomerizes underneath into a cage.

Crystal structure of alpha-COP in complex with epsilon-COP provides insight into the architecture of the COPI vesicular coat.,Hsia KC, Hoelz A Proc Natl Acad Sci U S A. 2010 Jun 22;107(25):11271-6. Epub 2010 Jun 3. PMID:20534429^[4]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Gabriely G, Kama R, Gerst JE. Involvement of specific COPI subunits in protein sorting from the late endosome to the vacuole in yeast. Mol Cell Biol. 2007 Jan;27(2):526-40. Epub 2006 Nov 13. PMID:17101773 doi:MCB.00577-06
↑ Duden R, Kajikawa L, Wuestehube L, Schekman R. epsilon-COP is a structural component of coatomer that functions to stabilize alpha-COP. EMBO J. 1998 Feb 16;17(4):985-95. PMID:9463377 doi:10.1093/emboj/17.4.985
↑ Gabriely G, Kama R, Gerst JE. Involvement of specific COPI subunits in protein sorting from the late endosome to the vacuole in yeast. Mol Cell Biol. 2007 Jan;27(2):526-40. Epub 2006 Nov 13. PMID:17101773 doi:MCB.00577-06
↑ Hsia KC, Hoelz A. Crystal structure of alpha-COP in complex with epsilon-COP provides insight into the architecture of the COPI vesicular coat. Proc Natl Acad Sci U S A. 2010 Jun 22;107(25):11271-6. Epub 2010 Jun 3. PMID:20534429

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/3mv2"

Categories: Saccharomyces cerevisiae | Hoelz, A | Hsia, K C | Protein transport | Vesicular membrane coat coat protein complex i

@@ Line 7: / Line 7: @@
 <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=3mv2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3mv2 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3mv2 RCSB], [http://www.ebi.ac.uk/pdbsum/3mv2 PDBsum]</span></td></tr>
 </table>
+== Function ==
+[[http://www.uniprot.org/uniprot/COPA_YEAST COPA_YEAST]] The coatomer is a cytosolic protein complex that binds to dilysine motifs and reversibly associates with Golgi non-clathrin-coated vesicles, which further mediate biosynthetic protein transport from the ER, via the Golgi up to the trans Golgi network. Coatomer complex is required for budding from Golgi membranes, and is essential for the retrograde Golgi-to-ER transport of dilysine-tagged proteins.<ref>PMID:17101773</ref>  [[http://www.uniprot.org/uniprot/COPE_YEAST COPE_YEAST]] The coatomer is a cytosolic protein complex that binds to dilysine motifs and reversibly associates with Golgi non-clathrin-coated vesicles, which further mediate biosynthetic protein transport from the ER, via the Golgi up to the trans Golgi network. Coatomer complex is required for budding from Golgi membranes, and is essential for the retrograde Golgi-to-ER transport of dilysine-tagged proteins. In mammals, the coatomer can only be recruited by membranes associated to ADP-ribosylation factors (ARFs), which are small GTP-binding proteins; the complex also influences the Golgi structural integrity, as well as the processing, activity, and endocytic recycling of LDL receptors (By similarity).<ref>PMID:9463377</ref> <ref>PMID:17101773</ref>
 == Evolutionary Conservation ==
 [[Image:Consurf_key_small.gif|200px|right]]

3mv2

From Proteopedia

Revision as of 10:51, 25 December 2014

Crystal Structure of a-COP in Complex with e-COP

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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