3o4x

From Proteopedia

(Difference between revisions)

Revision as of 13:10, 25 December 2014

Crystal structure of complex between amino and carboxy terminal fragments of mDia1

Structural highlights

3o4x is a 8 chain structure with sequence from Mus musculus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Gene:	Diaph1, Diap1 (Mus musculus)
Resources:	FirstGlance, OCA, RCSB, PDBsum

Function

[DIAP1_MOUSE] Acts in a Rho-dependent manner to recruit PFY1 to the membrane. Required for the assembly of F-actin structures, such as actin cables and stress fibers. Nucleates actin filaments. Binds to the barbed end of the actin filament and slows down actin polymerization and depolymerization. Required for cytokinesis, and transcriptional activation of the serum response factor. DFR proteins couple Rho and Src tyrosine kinase during signaling and the regulation of actin dynamics. Functions as a scaffold protein for MAPRE1 and APC to stabilize microtubules and promote cell migration. Has neurite outgrowth promoting activity. The MEMO1-RHOA-DIAPH1 signaling pathway plays an important role in ERBB2-dependent stabilization of microtubules at the cell cortex. It controls the localization of APC and CLASP2 to the cell membrane, via the regulation of GSK3B activity. In turn, membrane-bound APC allows the localization of the MACF1 to the cell membrane, which is required for microtubule capture and stabilization. Plays a role in the regulation of cell morphology and cytoskeletal organization. Required in the control of cell shape (By similarity).^[1] ^[2] ^[3] ^[4]

Publication Abstract from PubMed

Formin proteins direct the nucleation and assembly of linear actin filaments in a variety of cellular processes using their conserved formin homology 2 (FH2) domain. Diaphanous-related formins (DRFs) are effectors of Rho-family GTPases, and in the absence of Rho activation they are maintained in an inactive state by intramolecular interactions between their regulatory N-terminal region and a C-terminal segment referred to as the DAD domain. Although structures are available for the isolated DAD segment in complex with the interacting region in the N-terminus, it remains unclear how this leads to inhibition of actin assembly by the FH2 domain. Here we describe the crystal structure of the N-terminal regulatory region of formin mDia1 in complex with a C-terminal fragment containing both the FH2 and DAD domains. In the crystal structure and in solution, these fragments form a tetrameric complex composed of two interlocking N+C dimers. Formation of the tetramer is likely a consequence of the particular N-terminal construct employed, as we show that a nearly full-length mDia1 protein is dimeric, as are other autoinhibited N+C complexes containing longer N-terminal fragments. The structure provides the first view of the intact C-terminus of a DRF, revealing the relationship of the DAD to the FH2 domain. Delineation of alternative dimeric N+C interactions within the tetramer provides two general models for autoinhibition in intact formins. In both models, engagement of the DAD by the N-terminus is incompatible with actin filament formation on the FH2, and in one model the actin binding surfaces of the FH2 domain are directly blocked by the N-terminus.

Crystal structure of a complex between amino and carboxy terminal fragments of mDia1: insights into autoinhibition of diaphanous-related formins.,Nezami A, Poy F, Toms A, Zheng W, Eck MJ PLoS One. 2010 Sep 30;5(9). pii: e12992. PMID:20927338^[5]

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

References

↑ Watanabe N, Madaule P, Reid T, Ishizaki T, Watanabe G, Kakizuka A, Saito Y, Nakao K, Jockusch BM, Narumiya S. p140mDia, a mammalian homolog of Drosophila diaphanous, is a target protein for Rho small GTPase and is a ligand for profilin. EMBO J. 1997 Jun 2;16(11):3044-56. PMID:9214622 doi:http://dx.doi.org/10.1093/emboj/16.11.3044
↑ Tominaga T, Sahai E, Chardin P, McCormick F, Courtneidge SA, Alberts AS. Diaphanous-related formins bridge Rho GTPase and Src tyrosine kinase signaling. Mol Cell. 2000 Jan;5(1):13-25. PMID:10678165
↑ Higashida C, Miyoshi T, Fujita A, Oceguera-Yanez F, Monypenny J, Andou Y, Narumiya S, Watanabe N. Actin polymerization-driven molecular movement of mDia1 in living cells. Science. 2004 Mar 26;303(5666):2007-10. PMID:15044801 doi:http://dx.doi.org/10.1126/science.1093923
↑ Schwaibold EM, Brandt DT. Identification of Neurochondrin as a new interaction partner of the FH3 domain of the Diaphanous-related formin Dia1. Biochem Biophys Res Commun. 2008 Aug 29;373(3):366-72. doi:, 10.1016/j.bbrc.2008.06.042. Epub 2008 Jun 20. PMID:18572016 doi:http://dx.doi.org/10.1016/j.bbrc.2008.06.042
↑ Nezami A, Poy F, Toms A, Zheng W, Eck MJ. Crystal structure of a complex between amino and carboxy terminal fragments of mDia1: insights into autoinhibition of diaphanous-related formins. PLoS One. 2010 Sep 30;5(9). pii: e12992. PMID:20927338 doi:10.1371/journal.pone.0012992

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/3o4x"

@@ Line 3: / Line 3: @@
 == Structural highlights ==
 <table><tr><td colspan='2'>[[3o4x]] is a 8 chain structure with sequence from [http://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3O4X OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3O4X FirstGlance]. <br>
-</td></tr><tr><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">Diaph1, Diap1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10090 Mus musculus])</td></tr>
+</td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">Diaph1, Diap1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10090 Mus musculus])</td></tr>
-<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3o4x FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3o4x OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3o4x RCSB], [http://www.ebi.ac.uk/pdbsum/3o4x PDBsum]</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=3o4x FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3o4x OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3o4x RCSB], [http://www.ebi.ac.uk/pdbsum/3o4x PDBsum]</span></td></tr>
-<table>
+</table>
+== Function ==
+[[http://www.uniprot.org/uniprot/DIAP1_MOUSE DIAP1_MOUSE]] Acts in a Rho-dependent manner to recruit PFY1 to the membrane. Required for the assembly of F-actin structures, such as actin cables and stress fibers. Nucleates actin filaments. Binds to the barbed end of the actin filament and slows down actin polymerization and depolymerization. Required for cytokinesis, and transcriptional activation of the serum response factor. DFR proteins couple Rho and Src tyrosine kinase during signaling and the regulation of actin dynamics. Functions as a scaffold protein for MAPRE1 and APC to stabilize microtubules and promote cell migration. Has neurite outgrowth promoting activity. The MEMO1-RHOA-DIAPH1 signaling pathway plays an important role in ERBB2-dependent stabilization of microtubules at the cell cortex. It controls the localization of APC and CLASP2 to the cell membrane, via the regulation of GSK3B activity. In turn, membrane-bound APC allows the localization of the MACF1 to the cell membrane, which is required for microtubule capture and stabilization. Plays a role in the regulation of cell morphology and cytoskeletal organization. Required in the control of cell shape (By similarity).<ref>PMID:9214622</ref> <ref>PMID:10678165</ref> <ref>PMID:15044801</ref> <ref>PMID:18572016</ref>
 <div style="background-color:#fffaf0;">
 == Publication Abstract from PubMed ==
@@ Line 12: / Line 14: @@
 Crystal structure of a complex between amino and carboxy terminal fragments of mDia1: insights into autoinhibition of diaphanous-related formins.,Nezami A, Poy F, Toms A, Zheng W, Eck MJ PLoS One. 2010 Sep 30;5(9). pii: e12992. PMID:20927338<ref>PMID:20927338</ref>
-From MEDLINEÂ®/PubMedÂ®, a database of the U.S. National Library of Medicine.<br>
+From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
 == References ==
@@ Line 19: / Line 21: @@
 </StructureSection>
 [[Category: Mus musculus]]
-[[Category: Eck, M J.]]
+[[Category: Eck, M J]]
-[[Category: Nezami, A.]]
+[[Category: Nezami, A]]
-[[Category: Toms, A V.]]
+[[Category: Toms, A V]]
 [[Category: Actin binding]]
 [[Category: Actin nucleator]]
 [[Category: Autoinhibition]]
 [[Category: Protein binding]]

3o4x

From Proteopedia

Revision as of 13:10, 25 December 2014

Crystal structure of complex between amino and carboxy terminal fragments of mDia1

Structural highlights

Function

Publication Abstract from PubMed

References

Contents

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