1JCV

REDUCED BRIDGE-BROKEN YEAST CU/ZN SUPEROXIDE DISMUTASE LOW TEMPERATURE (-180C) STRUCTURE

1JCV の概要

• エントリーDOI: 10.2210/pdb1jcv/pdb
• 分子名称: CU/ZN SUPEROXIDE DISMUTASE, COPPER (II) ION, ZINC ION, ... (4 entities in total)
• 機能のキーワード: oxidoreductase, oxidoreductase (superoxide acceptor)
• 由来する生物種: Saccharomyces cerevisiae (baker's yeast)
• 細胞内の位置: Cytoplasm: P00445
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 15872.34

構造登録者

Ogihara, N.L.,Parge, H.E.,Hart, P.J.,Weiss, M.S.,Valentine, J.S.,Eisenberg, D.S.,Tainer, J.A. (登録日: 1995-12-07, 公開日: 1996-03-08, 最終更新日: 2024-11-20)

主引用文献

Ogihara, N.L.,Parge, H.E.,Hart, P.J.,Weiss, M.S.,Goto, J.J.,Crane, B.R.,Tsang, J.,Slater, K.,Roe, J.A.,Valentine, J.S.,Eisenberg, D.,Tainer, J.A.
Unusual trigonal-planar copper configuration revealed in the atomic structure of yeast copper-zinc superoxide dismutase.
Biochemistry, 35:2316-2321, 1996

PubMed Abstract: The three-dimensional structure of yeast copper-zinc superoxide dismutase (CuZnSOD) has been determined in a new crystal form in space group R32 and refined against X-ray diffraction data using difference Fourier and restrained crystallographic refinement techniques. The unexpected result is that the copper ion has moved approximately 1 angstrom from its position in previously reported CuZnSOD models, the copper-imidazolate bridge is broken, and a roughly trigonal planar ligand geometry characteristic of Cu(I) rather than Cu(II) is revealed. Final R values for the two nearly identical room temperature structures are 18.6% for all 19 149 reflections in the 10.0-1.7 angstrom resolution range and 18. 2% for 17 682 reflections (F > 2 sigma) in the 10.0-1.73 angstrom resolution range. A third structure has been determined using X-ray data collected at -180 degrees C. The final R value for this structure is 19.0% (R(free) = 22.9%) for all 24 356 reflections in the 10.0-1.55 angstrom resolution range. Virtually no change in the positions of the ligands to the zinc center is observed in these models. The origin of the broken bridge and altered Cu-ligand geometry is discussed.

PubMed: 8652572
DOI: 10.1021/bi951930b

実験手法

X-RAY DIFFRACTION (1.55 Å)