3FRS

Structure of human IST1(NTD) (residues 1-189)(p43212)

3FRS の概要

• エントリーDOI: 10.2210/pdb3frs/pdb
• 関連するPDBエントリー: 3FRR 3FRT 3FRV
• 分子名称: Uncharacterized protein KIAA0174, GLYCEROL (3 entities in total)
• 機能のキーワード: escrt, escrt-iii, ist1, phosphoprotein, protein binding
• 由来する生物種: Homo sapiens (Human)
• 細胞内の位置: Cytoplasmic vesicle : P53990
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 21717.45

構造登録者

Schubert, H.L.,Hill, C.P.,Bajorek, M.,Sundquist, W.I. (登録日: 2009-01-08, 公開日: 2009-06-30, 最終更新日: 2024-02-21)

主引用文献

Bajorek, M.,Schubert, H.L.,McCullough, J.,Langelier, C.,Eckert, D.M.,Stubblefield, W.M.,Uter, N.T.,Myszka, D.G.,Hill, C.P.,Sundquist, W.I.
Structural basis for ESCRT-III protein autoinhibition.
Nat.Struct.Mol.Biol., 16:754-762, 2009

PubMed Abstract: Endosomal sorting complexes required for transport-III (ESCRT-III) subunits cycle between two states: soluble monomers and higher-order assemblies that bind and remodel membranes during endosomal vesicle formation, midbody abscission and enveloped virus budding. Here we show that the N-terminal core domains of increased sodium tolerance-1 (IST1) and charged multivesicular body protein-3 (CHMP3) form equivalent four-helix bundles, revealing that IST1 is a previously unrecognized ESCRT-III family member. IST1 and its ESCRT-III binding partner, CHMP1B, both form higher-order helical structures in vitro, and IST1-CHMP1 interactions are required for abscission. The IST1 and CHMP3 structures also reveal that equivalent downstream alpha5 helices can fold back against the core domains. Mutations within the CHMP3 core-alpha5 interface stimulate the protein's in vitro assembly and HIV-inhibition activities, indicating that dissociation of the autoinhibitory alpha5 helix from the core activates ESCRT-III proteins for assembly at membranes.

PubMed: 19525971
DOI: 10.1038/nsmb.1621

実験手法

X-RAY DIFFRACTION (2.61 Å)