5O9I

Crystal structure of transcription factor IIB Mvu mini-intein

5O9I の概要

• エントリーDOI: 10.2210/pdb5o9i/pdb
• 分子名称: Transcription initiation factor IIB,Transcription initiation factor IIB (2 entities in total)
• 機能のキーワード: transcription factor iib, mini-intein, hint fold, transcription
• 由来する生物種: Methanocaldococcus vulcanius; 詳細
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 44128.82

構造登録者

Mikula, K.M.,Iwai, H.,Li, M.,Wlodawer, A. (登録日: 2017-06-19, 公開日: 2017-11-01, 最終更新日: 2024-06-19)

主引用文献

Iwai, H.,Mikula, K.M.,Oeemig, J.S.,Zhou, D.,Li, M.,Wlodawer, A.
Structural Basis for the Persistence of Homing Endonucleases in Transcription Factor IIB Inteins.
J. Mol. Biol., 429:3942-3956, 2017

PubMed Abstract: Inteins are mobile genetic elements that are spliced out of proteins after translation. Some inteins contain a homing endonuclease (HEN) responsible for their propagation. Hedgehog/INTein (HINT) domains catalyzing protein splicing and their nested HEN domains are thought to be functionally independent because of the existence of functional mini-inteins without HEN domains. Despite the lack of obvious mutualism between HEN and HINT domains, HEN domains are persistently found at one specific site in inteins, indicating their potential functional role in protein splicing. Here we report crystal structures of inactive and active mini-inteins derived from inteins residing in the transcription factor IIB of Methanococcus jannaschii and Methanocaldococcus vulcanius, revealing a novel modified HINT fold that might provide new insights into the mutualism between the HEN and HINT domains. We propose an evolutionary model of inteins and a functional role of HEN domains in inteins.

PubMed: 29055778
DOI: 10.1016/j.jmb.2017.10.016

実験手法

X-RAY DIFFRACTION (2.5 Å)