3D2N

Crystal structure of MBNL1 tandem zinc finger 1 and 2 domain

3D2N の概要

• エントリーDOI: 10.2210/pdb3d2n/pdb
• 関連するPDBエントリー: 3D2Q 3D2S
• 分子名称: Muscleblind-like protein 1, ZINC ION (3 entities in total)
• 機能のキーワード: tandem zinc finger domain, alternative splicing, metal-binding, nucleus, rna-binding, zinc, zinc-finger, metal binding, rna binding protein
• 由来する生物種: Homo sapiens (Human)
• 細胞内の位置: Nucleus: Q9NR56
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 9752.80

構造登録者

Teplova, M.,Patel, D.J. (登録日: 2008-05-08, 公開日: 2008-12-02, 最終更新日: 2024-02-21)

主引用文献

Teplova, M.,Patel, D.J.
Structural insights into RNA recognition by the alternative-splicing regulator muscleblind-like MBNL1.
Nat.Struct.Mol.Biol., 15:1343-1351, 2008

PubMed Abstract: Muscleblind-like (MBNL) proteins, regulators of developmentally programmed alternative splicing, harbor tandem CCCH zinc-finger (ZnF) domains that target pre-mRNAs containing YGCU(U/G)Y sequence elements (where Y is a pyrimidine). In myotonic dystrophy, reduced levels of MBNL proteins lead to aberrant alternative splicing of a subset of pre-mRNAs. The crystal structure of MBNL1 ZnF3/4 bound to r(CGCUGU) establishes that both ZnF3 and ZnF4 target GC steps, with site-specific recognition mediated by a network of hydrogen bonds formed primarily with main chain groups of the protein. The relative alignment of ZnF3 and ZnF4 domains is dictated by the topology of the interdomain linker, with a resulting antiparallel orientation of bound GC elements, supportive of a chain-reversal loop trajectory for MBNL1-bound pre-mRNA targets. We anticipate that MBNL1-mediated targeting of looped RNA segments proximal to splice-site junctions could contribute to pre-mRNA alternative-splicing regulation.

PubMed: 19043415
DOI: 10.1038/nsmb.1519

実験手法

X-RAY DIFFRACTION (2.7 Å)