4I67

Crystal structure of the RRM domain of RNA helicase HERA from T. thermophilus in complex with GGGC RNA

4I67 の概要

• エントリーDOI: 10.2210/pdb4i67/pdb
• 関連するPDBエントリー: 3I31 4I68 4I69
• 分子名称: Heat resistant RNA dependent ATPase, 5'-R(P*GP*GP*GP*(RPC))-3' (3 entities in total)
• 機能のキーワード: unwinding, atpase, heat resistant, rna recognition motif, rna binding, dead box protein, hydrolase-rna complex, hydrolase/rna
• 由来する生物種: Thermus thermophilus
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 10953.83

構造登録者

Rudolph, M.G.,Klostermeier, D. (登録日: 2012-11-29, 公開日: 2013-04-24, 最終更新日: 2023-09-20)

主引用文献

Steimer, L.,Wurm, J.P.,Linden, M.H.,Rudolph, M.G.,Wohnert, J.,Klostermeier, D.
Recognition of two distinct elements in the RNA substrate by the RNA-binding domain of the T. thermophilus DEAD box helicase Hera.
Nucleic Acids Res., 41:6259-6272, 2013

PubMed Abstract: DEAD box helicases catalyze the ATP-dependent destabilization of RNA duplexes. Whereas duplex separation is mediated by the helicase core shared by all members of the family, flanking domains often contribute to binding of the RNA substrate. The Thermus thermophilus DEAD-box helicase Hera (for "heat-resistant RNA-binding ATPase") contains a C-terminal RNA-binding domain (RBD). We have analyzed RNA binding to the Hera RBD by a combination of mutational analyses, nuclear magnetic resonance and X-ray crystallography, and identify residues on helix α1 and the C-terminus as the main determinants for high-affinity RNA binding. A crystal structure of the RBD in complex with a single-stranded RNA resolves the RNA-protein interactions in the RBD core region around helix α1. Differences in RNA binding to the Hera RBD and to the structurally similar RBD of the Bacillus subtilis DEAD box helicase YxiN illustrate the versatility of RNA recognition motifs as RNA-binding platforms. Comparison of chemical shift perturbation patterns elicited by different RNAs, and the effect of sequence changes in the RNA on binding and unwinding show that the RBD binds a single-stranded RNA region at the core and simultaneously contacts double-stranded RNA through its C-terminal tail. The helicase core then unwinds an adjacent RNA duplex. Overall, the mode of RNA binding by Hera is consistent with a possible function as a general RNA chaperone.

PubMed: 23625962
DOI: 10.1093/nar/gkt323

実験手法

X-RAY DIFFRACTION (2.33 Å)