5Y2H

Crystal structure of the oligomerization domain of NSP4 from the rotavirus strain MF66

5Y2H の概要

• エントリーDOI: 10.2210/pdb5y2h/pdb
• 分子名称: Nonstructural protein 4 (2 entities in total)
• 機能のキーワード: antiparallel tetramer nsp4 rotavirus coiled-coil mf66, viral protein
• 由来する生物種: Bovine rotavirus G10
• タンパク質・核酸の鎖数: 4
• 化学式量合計: 24604.73

構造登録者

Suguna, K.,Kumar, S. (登録日: 2017-07-25, 公開日: 2018-03-14, 最終更新日: 2024-03-27)

主引用文献

Kumar, S.,Ramappa, R.,Pamidimukkala, K.,Rao, C.D.,Suguna, K.
New tetrameric forms of the rotavirus NSP4 with antiparallel helices.
Arch. Virol., 163:1531-1547, 2018

PubMed Abstract: Rotavirus nonstructural protein 4, the first viral enterotoxin to be identified, is a multidomain, multifunctional glycoprotein. Earlier, we reported a Ca-bound coiled-coil tetrameric structure of the diarrhea-inducing region of NSP4 from the rotavirus strains SA11 and I321 and a Ca-free pentameric structure from the rotavirus strain ST3, all with a parallel arrangement of α-helices. pH was found to determine the oligomeric state: a basic pH favoured a tetramer, whereas an acidic pH favoured a pentamer. Here, we report two novel forms of the coiled-coil region of NSP4 from the bovine rotavirus strains MF66 and NCDV. These crystallized at acidic pH, forming antiparallel coiled-coil tetrameric structures without any bound Ca ion. Structural and mutational studies of the coiled-coil regions of NSP4 revealed that the nature of the residue at position 131 (Tyr/His) plays an important role in the observed structural diversity.

PubMed: 29455326
DOI: 10.1007/s00705-018-3753-6

実験手法

X-RAY DIFFRACTION (2.6 Å)