1di2
From Proteopedia
(New page: 200px<br /><applet load="1di2" size="450" color="white" frame="true" align="right" spinBox="true" caption="1di2, resolution 1.90Å" /> '''CRYSTAL STRUCTURE OF...) |
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| - | [[Image:1di2.jpg|left|200px]]<br /><applet load="1di2" size=" | + | [[Image:1di2.jpg|left|200px]]<br /><applet load="1di2" size="350" color="white" frame="true" align="right" spinBox="true" |
caption="1di2, resolution 1.90Å" /> | caption="1di2, resolution 1.90Å" /> | ||
'''CRYSTAL STRUCTURE OF A DSRNA-BINDING DOMAIN COMPLEXED WITH DSRNA: MOLECULAR BASIS OF DOUBLE-STRANDED RNA-PROTEIN INTERACTIONS'''<br /> | '''CRYSTAL STRUCTURE OF A DSRNA-BINDING DOMAIN COMPLEXED WITH DSRNA: MOLECULAR BASIS OF DOUBLE-STRANDED RNA-PROTEIN INTERACTIONS'''<br /> | ||
==Overview== | ==Overview== | ||
| - | Protein interactions with double-stranded RNA (dsRNA) are critical for | + | Protein interactions with double-stranded RNA (dsRNA) are critical for many cell processes; however, in contrast to protein-dsDNA interactions, surprisingly little is known about the molecular basis of protein-dsRNA interactions. A large and diverse class of proteins that bind dsRNA do so by utilizing an approximately 70 amino acid motif referred to as the dsRNA-binding domain (dsRBD). We have determined a 1.9 A resolution crystal structure of the second dsRBD of Xenopus laevis RNA-binding protein A complexed with dsRNA. The structure shows that the protein spans 16 bp of dsRNA, interacting with two successive minor grooves and across the intervening major groove on one face of a primarily A-form RNA helix. The nature of these interactions explains dsRBD specificity for dsRNA (over ssRNA or dsDNA) and the apparent lack of sequence specificity. Interestingly, the dsRBD fold resembles a portion of the conserved core structure of a family of polynucleotidyl transferases that includes RuvC, MuA transposase, retroviral integrase and RNase H. Structural comparisons of the dsRBD-dsRNA complex and models proposed for polynucleotidyl transferase-nucleic acid complexes suggest that similarities in nucleic acid binding also exist between these families of proteins. |
==About this Structure== | ==About this Structure== | ||
| - | 1DI2 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Xenopus_laevis Xenopus laevis]. Full crystallographic information is available from [http:// | + | 1DI2 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Xenopus_laevis Xenopus laevis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1DI2 OCA]. |
==Reference== | ==Reference== | ||
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[[Category: Single protein]] | [[Category: Single protein]] | ||
[[Category: Xenopus laevis]] | [[Category: Xenopus laevis]] | ||
| - | [[Category: Ryter, J | + | [[Category: Ryter, J M.]] |
| - | [[Category: Schultz, S | + | [[Category: Schultz, S C.]] |
[[Category: double stranded rna]] | [[Category: double stranded rna]] | ||
[[Category: protein-rna complex]] | [[Category: protein-rna complex]] | ||
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[[Category: rna-bining protein]] | [[Category: rna-bining protein]] | ||
| - | ''Page seeded by [http:// | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 12:16:48 2008'' |
Revision as of 10:16, 21 February 2008
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CRYSTAL STRUCTURE OF A DSRNA-BINDING DOMAIN COMPLEXED WITH DSRNA: MOLECULAR BASIS OF DOUBLE-STRANDED RNA-PROTEIN INTERACTIONS
Overview
Protein interactions with double-stranded RNA (dsRNA) are critical for many cell processes; however, in contrast to protein-dsDNA interactions, surprisingly little is known about the molecular basis of protein-dsRNA interactions. A large and diverse class of proteins that bind dsRNA do so by utilizing an approximately 70 amino acid motif referred to as the dsRNA-binding domain (dsRBD). We have determined a 1.9 A resolution crystal structure of the second dsRBD of Xenopus laevis RNA-binding protein A complexed with dsRNA. The structure shows that the protein spans 16 bp of dsRNA, interacting with two successive minor grooves and across the intervening major groove on one face of a primarily A-form RNA helix. The nature of these interactions explains dsRBD specificity for dsRNA (over ssRNA or dsDNA) and the apparent lack of sequence specificity. Interestingly, the dsRBD fold resembles a portion of the conserved core structure of a family of polynucleotidyl transferases that includes RuvC, MuA transposase, retroviral integrase and RNase H. Structural comparisons of the dsRBD-dsRNA complex and models proposed for polynucleotidyl transferase-nucleic acid complexes suggest that similarities in nucleic acid binding also exist between these families of proteins.
About this Structure
1DI2 is a Single protein structure of sequence from Xenopus laevis. Full crystallographic information is available from OCA.
Reference
Molecular basis of double-stranded RNA-protein interactions: structure of a dsRNA-binding domain complexed with dsRNA., Ryter JM, Schultz SC, EMBO J. 1998 Dec 15;17(24):7505-13. PMID:9857205
Page seeded by OCA on Thu Feb 21 12:16:48 2008
