2SNV

THE REFINED STRUCTURE OF SINDBIS VIRUS CORE PROTEIN IN COMPARISON WITH OTHER CHYMOTRYPSIN-LIKE SERINE PROTEINASE STRUCTURES

2SNV の概要

• エントリーDOI: 10.2210/pdb2snv/pdb
• 分子名称: SINDBIS VIRUS COAT PROTEIN (1 entity in total)
• 機能のキーワード: viral protein
• 由来する生物種: Sindbis virus
• 細胞内の位置: Capsid protein: Virion (By similarity). p62: Virion membrane; Single-pass type I membrane protein (By similarity). E2 envelope glycoprotein: Virion membrane; Single-pass type I membrane protein (By similarity). E1 envelope glycoprotein: Virion membrane; Single-pass type I membrane protein (By similarity). 6K protein: Host cell membrane; Multi-pass membrane protein (By similarity): P03316
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 16545.63

構造登録者

Tong, L.,Rossmann, M.G. (登録日: 1992-07-17, 公開日: 1993-10-31, 最終更新日: 2024-02-21)

主引用文献

Tong, L.,Wengler, G.,Rossmann, M.G.
Refined structure of Sindbis virus core protein and comparison with other chymotrypsin-like serine proteinase structures.
J.Mol.Biol., 230:228-247, 1993

PubMed Abstract: Crystal forms 2 and 3 of Sindbis virus core protein have been refined to 2.8 A and 3.0 A resolution, respectively. The three independent molecular copies in the two crystal forms are essentially identical, except for regions where the molecules are involved in different crystal packing interactions. The overall polypeptide backbone fold of Sindbis virus core protein is similar to other chymotrypsin-like serine proteinase structures despite a lack of significant sequence homology. Detailed analysis revealed differences in the catalytic triad and the substrate binding pockets between the Sindbis virus core protein and the other serine proteinases. The catalytic aspartic acid residue (Asp163) and residue Asp214 (corresponding to Asp194 in chymotrypsin) are partially exposed to solvent in Sindbis virus core protein. Chymotrypsin Ser214, hydrogen bonded to the catalytic aspartic acid residue in all other serine proteinase structures, is changed to Leu231 in Sindbis virus core protein. Deletions in the loop regions on the surface of the protein account for the smaller size of the ordered part of Sindbis virus core protein (151 residues) as compared to chymotrypsin (236 residues), and permits the cis autocatalytic cleavage of the polyprotein to produce the viral capsid protein.

PubMed: 8450538
DOI: 10.1006/jmbi.1993.1139

実験手法

X-RAY DIFFRACTION (2.8 Å)