2EUY

Solution structure of the internal loop of human U65 H/ACA snoRNA 3' hairpin

Summary for 2EUY

• Entry DOI: 10.2210/pdb2euy/pdb
• Descriptor: U65 box H/ACA snoRNA (1 entity in total)
• Functional Keywords: haripin, internal-loop, rna
• Total number of polymer chains: 1
• Total formula weight: 10970.57

Authors

Feigon, J.,Khanna, M.,Wu, H.,Johansson, C.,Caizergues-Ferrer, M. (deposition date: 2005-10-30, release date: 2006-01-03, Last modification date: 2024-05-22)

Primary citation

Khanna, M.,Wu, H.,Johansson, C.,Caizergues-Ferrer, M.,Feigon, J.
Structural study of the H/ACA snoRNP components Nop10p and the 3' hairpin of U65 snoRNA.
Rna, 12:40-52, 2006

PubMed Abstract: The H/ACA small nucleolar ribonucleoprotein (snoRNP) complexes guide the modification of uridine to pseudouridine at conserved sites in rRNA. The H/ACA snoRNPs each comprise a target-site-specific snoRNA and four core proteins, Nop10p, Nhp2p, Gar1p, and the pseudouridine synthase, Cbf5p, in yeast. The secondary structure of the H/ACA snoRNAs includes two hairpins that each contain a large internal loop (the pseudouridylation pocket), one or both of which are partially complementary to the target RNA(s). We have determined the solution structure of an RNA hairpin derived from the human U65 box H/ACA snoRNA including the pseudouridylation pocket and adjacent stems, providing the first three-dimensional structural information on these H/ACA snoRNAs. We have also determined the structure of Nop10p and investigated its interaction with RNA using NMR spectroscopy. Nop10p contains a structurally well-defined N-terminal region composed of a beta-hairpin, and the rest of the protein lacks a globular structure. Chemical shift mapping of the interaction of RNA constructs of U65 box H/ACA 3' hairpin with Nop10p shows that the beta-hairpin binds weakly but specifically to RNA. The unstructured region of Nop10p likely interacts with Cbf5p.

PubMed: 16373493
DOI: 10.1261/rna.2221606

Experimental method

SOLUTION NMR