ジャーナル: Mol Cell / 年: 2014 タイトル: Fragile X mental retardation protein regulates translation by binding directly to the ribosome. 著者: Eileen Chen / Manjuli R Sharma / Xinying Shi / Rajendra K Agrawal / Simpson Joseph / 要旨: Fragile X syndrome (FXS) is the most common form of inherited mental retardation, and it is caused by loss of function of the fragile X mental retardation protein (FMRP). FMRP is an RNA-binding ...Fragile X syndrome (FXS) is the most common form of inherited mental retardation, and it is caused by loss of function of the fragile X mental retardation protein (FMRP). FMRP is an RNA-binding protein that is involved in the translational regulation of several neuronal mRNAs. However, the precise mechanism of translational inhibition by FMRP is unknown. Here, we show that FMRP inhibits translation by binding directly to the L5 protein on the 80S ribosome. Furthermore, cryoelectron microscopic reconstruction of the 80S ribosome⋅FMRP complex shows that FMRP binds within the intersubunit space of the ribosome such that it would preclude the binding of tRNA and translation elongation factors on the ribosome. These findings suggest that FMRP inhibits translation by blocking the essential components of the translational machinery from binding to the ribosome.
The particles were selected using automatic selection and manual screening in SPIDER
CTF補正
詳細: each defocus volume
最終 再構成
アルゴリズム: OTHER / 解像度のタイプ: BY AUTHOR / 解像度: 11.2 Å / 解像度の算出法: OTHER / ソフトウェア - 名称: Spider 詳細: CTF corrected volume was enhanced for high spatial frequencies. 使用した粒子像数: 78267