1vec

Crystal structure of the N-terminal domain of rck/p54, a human DEAD-box protein

spinqualitylabelsall models 1vec, resolution 2.01Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1vec is a 2 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: TLA, ZN Related: 1qde, 1qva, 1q0u Gene: HUMRCK (Homo sapiens) Resources: FirstGlance, OCA, RCSB, PDBsum Disease [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 [DDX6_HUMAN] In the process of mRNA degradation, may play a role in mRNA decapping. 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 Human rck/p54, a product of the gene cloned at the breakpoint of t(11; 14) (q23;q32) chromosomal translocation on 11q23 in B-cell lymphoma, is a member of the DEAD-box RNA helicase family. Here, the crystal structure of Nc-rck/p54, the N-terminal core domain of rck/p54, revealed that the P-loop in motif I formed a closed conformation, which was induced by Asn131, a residue unique to the RCK subfamily. It appears that ATP does not bind to the P-loop. The results of dynamic light scattering revealed to ATP-induced conformational change of rck/p54. It was demonstrated that free rck/p54 is a distended molecule in solution, and that the approach between N-terminal core and C-terminal domains for ATP binding would be essential when unwinding RNA. The results from helicase assay using electron micrograph, ATP hydrolytic and luciferase assay showed that c-myc IRES RNA, whose secondary structure regulates IRES-dependant translation, was unwound by rck/p54 and indicated that it is a good substrate for rck/p54. Over-expression of rck/p54 in HeLa cells caused growth inhibition and cell cycle arrest at G2/M with down-regulation of c-myc expression. These findings altogether suggest that rck/p54 may affect the IRES-dependent translation of c-myc even in the cells. Structural insight of human DEAD-box protein rck/p54 into its substrate recognition with conformational changes.,Matsui T, Hogetsu K, Usukura J, Sato T, Kumasaka T, Akao Y, Tanaka N Genes Cells. 2006 Apr;11(4):439-52. PMID:16611246 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Helicase

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