2FNP

Crystal structure of SarA

2FNP の概要

• エントリーDOI: 10.2210/pdb2fnp/pdb
• 分子名称: Staphylococcal accessory regulator A (2 entities in total)
• 機能のキーワード: wing-helix, dna binding, transcription
• 由来する生物種: Staphylococcus aureus
• 細胞内の位置: Cytoplasm (By similarity): Q7A1N5
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 29550.04

構造登録者

Liu, Y.,Manna, A.C.,Pan, C.H.,Cheung, A.L.,Zhang, G. (登録日: 2006-01-11, 公開日: 2006-01-31, 最終更新日: 2024-02-14)

主引用文献

Liu, Y.,Manna, A.C.,Pan, C.H.,Kriksunov, I.A.,Thiel, D.J.,Cheung, A.L.,Zhang, G.
Structural and function analyses of the global regulatory protein SarA from Staphylococcus aureus.
Proc.Natl.Acad.Sci.Usa, 103:2392-2397, 2006

PubMed Abstract: The sarA locus in Staphylococcus aureus controls the expression of many virulence genes. The sarA regulatory molecule, SarA, is a 14.7-kDa protein (124 residues) that binds to the promoter region of target genes. Here we report the 2.6 A-resolution x-ray crystal structure of the dimeric winged helix SarA protein, which differs from the published SarA structure dramatically. In the crystal packing, multiple dimers of SarA form a scaffold, possibly via divalent cations. Mutations of individual residues within the DNA-binding helix-turn-helix and the winged region as well as within the metal-binding pocket implicate basic residues R84 and R90 within the winged region to be critical in DNA binding, whereas acidic residues D88 and E89 (wing), D8 and E11 (metal-binding pocket), and cysteine 9 are essential for SarA function. These data suggest that the winged region of the winged helix protein participates in DNA binding and activation, whereas the putative divalent cation binding pocket is only involved in gene function.

PubMed: 16455801
DOI: 10.1073/pnas.0510439103

実験手法

X-RAY DIFFRACTION (2.6 Å)