2XAU

Crystal structure of the Prp43p DEAH-box RNA helicase in complex with ADP

Summary for 2XAU

• Entry DOI: 10.2210/pdb2xau/pdb
• Descriptor: PRE-MRNA-SPLICING FACTOR ATP-DEPENDENT RNA HELICASE PRP43, ADENOSINE-5'-DIPHOSPHATE, MAGNESIUM ION, ... (7 entities in total)
• Functional Keywords: hydrolase, ribosome biogenesis, atpase, atp-binding, ob-fold
• Biological source: SACCHAROMYCES CEREVISIAE (BAKER'S YEAST)
• Total number of polymer chains: 2
• Total formula weight: 178345.96

Authors

Walbott, H.,Mouffok, S.,Capeyrou, R.,Lebaron, S.,van Tilbeurgh, H.,Henry, Y.,Leulliot, N. (deposition date: 2010-03-31, release date: 2010-06-09, Last modification date: 2024-05-08)

Primary citation

Walbott, H.,Mouffok, S.,Capeyrou, R.,Lebaron, S.,Humbert, O.,Van Tilbeurgh, H.,Henry, Y.,Leulliot, N.
Prp43P Contains a Processive Helicase Structural Architecture with a Specific Regulatory Domain.
Embo J., 29:2194-, 2010

PubMed Abstract: The DEAH/RNA helicase A (RHA) helicase family comprises proteins involved in splicing, ribosome biogenesis and transcription regulation. We report the structure of yeast Prp43p, a DEAH/RHA helicase remarkable in that it functions in both splicing and ribosome biogenesis. Prp43p displays a novel structural architecture with an unforeseen homology with the Ski2-like Hel308 DNA helicase. Together with the presence of a beta-hairpin in the second RecA-like domain, Prp43p contains all the structural elements of a processive helicase. Moreover, our structure reveals that the C-terminal domain contains an oligonucleotide/oligosaccharide-binding (OB)-fold placed at the entrance of the putative nucleic acid cavity. Deletion or mutations of this domain decrease the affinity of Prp43p for RNA and severely reduce Prp43p ATPase activity in the presence of RNA. We also show that this domain constitutes the binding site for the G-patch-containing domain of Pfa1p. We propose that the C-terminal domain, specific to DEAH/RHA helicases, is a central player in the regulation of helicase activity by binding both RNA and G-patch domain proteins.

PubMed: 20512115
DOI: 10.1038/EMBOJ.2010.102

Experimental method

X-RAY DIFFRACTION (1.9 Å)