1vec
From Proteopedia
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'''Crystal structure of the N-terminal domain of rck/p54, a human DEAD-box protein''' | '''Crystal structure of the N-terminal domain of rck/p54, a human DEAD-box protein''' | ||
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| + | ==Overview== | ||
| + | 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. | ||
==About this Structure== | ==About this Structure== | ||
1VEC is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1VEC OCA]. | 1VEC is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1VEC OCA]. | ||
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| + | ==Reference== | ||
| + | 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:[http://www.ncbi.nlm.nih.gov/pubmed/16611246 16611246] | ||
[[Category: Homo sapiens]] | [[Category: Homo sapiens]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
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[[Category: Tanaka, N.]] | [[Category: Tanaka, N.]] | ||
[[Category: Yukihiro, Y.]] | [[Category: Yukihiro, Y.]] | ||
| - | [[Category: | + | [[Category: Dead-box protein]] |
| - | [[Category: | + | [[Category: Rna binding protein]] |
| - | + | [[Category: Rna helicase]] | |
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Wed Apr 30 13:21:11 2008'' |
Revision as of 10:21, 30 April 2008
Crystal structure of the N-terminal domain of rck/p54, a human DEAD-box protein
Overview
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.
About this Structure
1VEC is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.
Reference
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 Page seeded by OCA on Wed Apr 30 13:21:11 2008
