This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.
Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.
4ct4
From Proteopedia
(Difference between revisions)
| Line 1: | Line 1: | ||
| - | ''' | + | ==CNOT1 MIF4G domain - DDX6 complex== |
| + | <StructureSection load='4ct4' size='340' side='right' caption='[[4ct4]], [[Resolution|resolution]] 2.30Å' scene=''> | ||
| + | == Structural highlights == | ||
| + | <table><tr><td colspan='2'>[[4ct4]] is a 4 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4CT4 OCA]. <br> | ||
| + | </td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene><br> | ||
| + | <tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4ct5|4ct5]], [[4ct6|4ct6]], [[4ct7|4ct7]]</td></tr> | ||
| + | <tr><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Glucokinase Glucokinase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.1.2 2.7.1.2] </span></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=4ct4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4ct4 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4ct4 RCSB], [http://www.ebi.ac.uk/pdbsum/4ct4 PDBsum]</span></td></tr> | ||
| + | <table> | ||
| + | == Disease == | ||
| + | [[http://www.uniprot.org/uniprot/DDX6_HUMAN DDX6_HUMAN]] Note=A chromosomal aberration involving DDX6 may be a cause of hematopoietic tumors such as B-cell lymphomas. Translocation t(11;14)(q23;q32). | ||
| + | == Function == | ||
| + | [[http://www.uniprot.org/uniprot/CNOT1_HUMAN CNOT1_HUMAN]] Belongs to the CCR4-NOT complex that functions as general transcription regulation complex. Acts as a transcriptional repressor. Represses the ligand-dependent transcriptional activation by nuclear receptors.<ref>PMID:10637334</ref> <ref>PMID:16778766</ref> [[http://www.uniprot.org/uniprot/DDX6_HUMAN DDX6_HUMAN]] In the process of mRNA degradation, may play a role in mRNA decapping. | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | MicroRNAs (miRNAs) control gene expression by regulating mRNA translation and stability. The CCR4-NOT complex is a key effector of miRNA function acting downstream of GW182/TNRC6 proteins. We show that miRNA-mediated repression requires the central region of CNOT1, the scaffold protein of CCR4-NOT. A CNOT1 domain interacts with CNOT9, which in turn interacts with the silencing domain of TNRC6 in a tryptophan motif-dependent manner. These interactions are direct, as shown by the structure of a CNOT9-CNOT1 complex with bound tryptophan. Another domain of CNOT1 with an MIF4G fold recruits the DEAD-box ATPase DDX6, a known translational inhibitor. Structural and biochemical approaches revealed that CNOT1 modulates the conformation of DDX6 and stimulates ATPase activity. Structure-based mutations showed that the CNOT1 MIF4G-DDX6 interaction is important for miRNA-mediated repression. These findings provide insights into the repressive steps downstream of the GW182/TNRC6 proteins and the role of the CCR4-NOT complex in posttranscriptional regulation in general. | ||
| - | + | Structural and Biochemical Insights to the Role of the CCR4-NOT Complex and DDX6 ATPase in MicroRNA Repression.,Mathys H, Basquin J, Ozgur S, Czarnocki-Cieciura M, Bonneau F, Aartse A, Dziembowski A, Nowotny M, Conti E, Filipowicz W Mol Cell. 2014 Apr 22. pii: S1097-2765(14)00269-X. doi:, 10.1016/j.molcel.2014.03.036. PMID:24768538<ref>PMID:24768538</ref> | |
| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| - | + | </div> | |
| - | + | == References == | |
| + | <references/> | ||
| + | __TOC__ | ||
| + | </StructureSection> | ||
| + | [[Category: Basquin, J.]] | ||
| + | [[Category: Conti, E.]] | ||
| + | [[Category: Ozgur, S.]] | ||
| + | [[Category: Deadenylation]] | ||
| + | [[Category: Rna binding protein]] | ||
| + | [[Category: Transcription]] | ||
Revision as of 08:11, 7 May 2014
CNOT1 MIF4G domain - DDX6 complex
| |||||||||||
