3FHO

Structure of S. pombe Dbp5

3FHO の概要

• エントリーDOI: 10.2210/pdb3fho/pdb
• 分子名称: ATP-dependent RNA helicase dbp5 (1 entity in total)
• 機能のキーワード: rna helicase, mrna export, atpase, translation termination, atp-binding, helicase, hydrolase, membrane, mrna transport, nuclear pore complex, nucleotide-binding, nucleus, protein transport, rna-binding, translocation, transport
• 由来する生物種: Schizosaccharomyces pombe (Fission yeast)
• 細胞内の位置: Cytoplasm (By similarity): Q09747
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 106175.99

構造登録者

Cheng, Z.,Song, H. (登録日: 2008-12-09, 公開日: 2009-10-13, 最終更新日: 2023-11-01)

主引用文献

Fan, J.S.,Cheng, Z.,Zhang, J.,Noble, C.,Zhou, Z.,Song, H.,Yang, D.
Solution and crystal structures of mRNA exporter Dbp5p and its interaction with nucleotides
J.Mol.Biol., 388:1-10, 2009

PubMed Abstract: DEAD-box protein 5 (Dbp5p) plays very important roles in RNA metabolism from transcription, to translation, to RNA decay. It is an RNA helicase and functions as an essential RNA export factor from nucleus. Here, we report the solution NMR structures of the N- and C-terminal domains (NTD and CTD, respectively) of Dbp5p from Saccharomyces cerevisiae (ScDbp5p) and X-ray crystal structure of Dbp5p from Schizosaccharomyces pombe (SpDbp5p) in the absence of nucleotides and RNA. The crystal structure clearly shows that SpDbp5p comprises two RecA-like domains that do not interact with each other. NMR results show that the N-terminal flanking region of ScDpbp5 (M1-E70) is intrinsically unstructured and the region Y71-R121 including the Q motif is highly dynamic on millisecond-microsecond timescales in solution. The C-terminal flanking region of ScDbp5p forms a short beta-strand and a long helix. This helix is unique for ScDbp5p and has not been observed in other DEAD-box proteins. Compared with other DEAD-box proteins, Dbp5p has an extra insert with six residues in the CTD. NMR structure reveals that the insert is located in a solvent-exposed loop capable of interacting with other proteins. ATP and ADP titration experiments show that both ADP and ATP bind to the consensus binding site in the NTD of ScDbp5p but do not interact with the CTD at all. Binding of ATP or ADP to NTD induces significant conformational rearrangement too.

PubMed: 19281819
DOI: 10.1016/j.jmb.2009.03.004

実験手法

X-RAY DIFFRACTION (2.8 Å)