1JT8

ARCHAEAL INITIATION FACTOR-1A, AIF-1A

1JT8 の概要

• エントリーDOI: 10.2210/pdb1jt8/pdb
• 分子名称: PROBABLE TRANSLATION INITIATION FACTOR 1A (1 entity in total)
• 機能のキーワード: beta barrel, translation factor, translation
• 由来する生物種: Methanocaldococcus jannaschii
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 12205.26

構造登録者

Hoffman, D.W.,Li, W. (登録日: 2001-08-20, 公開日: 2001-09-05, 最終更新日: 2024-05-22)

主引用文献

Li, W.,Hoffman, D.W.
Structure and dynamics of translation initiation factor aIF-1A from the archaeon Methanococcus jannaschii determined by NMR spectroscopy
Protein Sci., 10:2426-2438, 2001

PubMed Abstract: Translation initiation factor 1A (aIF-1A) from the archaeon Methanococcus jannaschii was expressed in Escherichia coli, purified, and characterized in terms of its structure and dynamics using multidimensional NMR methods. The protein was found to be a member of the OB-fold family of RNA-associated proteins, containing a barrel of five beta-strands, a feature that is shared with the homologous eukaryotic translation initiation factor 1A (eIF-1A), as well as the prokaryotic translation initiation factor IF1. External to the beta barrel, aIF-1A contains an alpha-helix at its C-terminal and a flexible loop at its N-terminal, features that are qualitatively similar to those found in eIF-1A, but not present in prokaryotic IF1. The structural model of aIF-1A, when used in combination with primary sequence information for aIF-1A in divergent species, permitted the most-conserved residues on the protein surface to be identified, including the most likely candidates for direct interaction with the 16S ribosomal RNA and other components of the translational apparatus. Several of the conserved surface residues appear to be unique to the archaea. Nitrogen-15 relaxation and amide exchange rate data were used to characterize the internal motions within aIF-1A, providing evidence that the protein surfaces that are most likely to participate in intermolecular interactions are relatively flexible. A model is proposed, suggesting some specific interactions that may occur between aIF-1A and the small subunit of the archaeal ribosome.

PubMed: 11714910
DOI: 10.1110/ps.ps.18201

実験手法

SOLUTION NMR