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1px5

From Proteopedia

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{{STRUCTURE_1px5| PDB=1px5 | SCENE= }}
{{STRUCTURE_1px5| PDB=1px5 | SCENE= }}
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'''Crystal structure of the 2'-specific and double-stranded RNA-activated interferon-induced antiviral protein 2'-5'-oligoadenylate synthetase'''
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===Crystal structure of the 2'-specific and double-stranded RNA-activated interferon-induced antiviral protein 2'-5'-oligoadenylate synthetase===
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==Overview==
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2'-5'-oligoadenylate synthetases are interferon-induced, double-stranded RNA-activated antiviral enzymes which are the only proteins known to catalyze 2'-specific nucleotidyl transfer. This crystal structure of a 2'-5'-oligoadenylate synthetase reveals a structural conservation with the 3'-specific poly(A) polymerase that, coupled with structure-guided mutagenesis, supports a conserved catalytic mechanism for the 2'- and 3'-specific nucleotidyl transferases. Comparison with structures of other superfamily members indicates that the donor substrates are bound by conserved active site features while the acceptor substrates are oriented by nonconserved regions. The 2'-5'-oligoadenylate synthetases are activated by viral double-stranded RNA in infected cells and initiate a cellular response by synthesizing 2'-5'-oligoadenylates, which in turn activate RNase L. This crystal structure suggests that activation involves a domain-domain shift and identifies a putative dsRNA activation site that is probed by mutagenesis, thus providing structural insight into cellular recognition of viral double-stranded RNA.
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(as it appears on PubMed at http://www.pubmed.gov), where 14636576 is the PubMed ID number.
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{{ABSTRACT_PUBMED_14636576}}
==About this Structure==
==About this Structure==
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[[Category: 5-stranded antiparalel beta sheet]]
[[Category: 5-stranded antiparalel beta sheet]]
[[Category: Four helix bundle]]
[[Category: Four helix bundle]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 05:35:23 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 29 01:00:33 2008''

Revision as of 22:00, 28 July 2008

Image:1px5.png

Template:STRUCTURE 1px5

Crystal structure of the 2'-specific and double-stranded RNA-activated interferon-induced antiviral protein 2'-5'-oligoadenylate synthetase

Template:ABSTRACT PUBMED 14636576

About this Structure

1PX5 is a Single protein structure of sequence from Sus scrofa. Full crystallographic information is available from OCA.

Reference

Crystal structure of the 2'-specific and double-stranded RNA-activated interferon-induced antiviral protein 2'-5'-oligoadenylate synthetase., Hartmann R, Justesen J, Sarkar SN, Sen GC, Yee VC, Mol Cell. 2003 Nov;12(5):1173-85. PMID:14636576

Page seeded by OCA on Tue Jul 29 01:00:33 2008

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