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1wdy
From Proteopedia
| 1wdy, resolution 1.80Å () | |||||||||
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| Ligands: | |||||||||
| Domains: | ANK | ||||||||
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| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||||
Crystal structure of ribonuclease
An interferon-induced endoribonuclease, ribonuclease L (RNase L), is implicated in both the molecular mechanism of action of interferon and the fundamental control of RNA stability in mammalian cells. RNase L is catalytically active only after binding to an unusual activator molecule containing a 5'-phosphorylated 2',5'-linked oligoadenylate (2-5A), in the N-terminal half. Here, we report the crystal structure of the N-terminal ankyrin repeat domain (ANK) of human RNase L complexed with the activator 2-5A. This is the first structural view of an ankyrin repeat structure directly interacting with a nucleic acid, rather than with a protein. The ANK domain folds into eight ankyrin repeat elements and forms an extended curved structure with a concave surface. The 2-5A molecule is accommodated at a concave site and directly interacts with ankyrin repeats 2-4. Interestingly, two structurally equivalent 2-5A binding motifs are found at repeats 2 and 4. The structural basis for 2-5A recognition by ANK is essential for designing stable 2-5As with a high likelihood of activating RNase L.
Structural basis for recognition of 2',5'-linked oligoadenylates by human ribonuclease L., Tanaka N, Nakanishi M, Kusakabe Y, Goto Y, Kitade Y, Nakamura KT, EMBO J. 2004 Oct 13;23(20):3929-38. Epub 2004 Sep 23. PMID:15385955
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
About this Structure
1WDY is a 1 chain structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.
Reference
- Tanaka N, Nakanishi M, Kusakabe Y, Goto Y, Kitade Y, Nakamura KT. Structural basis for recognition of 2',5'-linked oligoadenylates by human ribonuclease L. EMBO J. 2004 Oct 13;23(20):3929-38. Epub 2004 Sep 23. PMID:15385955 doi:10.1038/sj.emboj.7600420
Page seeded by OCA on Tue Feb 17 02:50:04 2009
