3GHR

Human aldose reductase in complex with NADP+ and the inhibitor IDD594. Investigation of global effects of radiation damage on protein structure. First stage of radiation damage

3GHR の概要

• エントリーDOI: 10.2210/pdb3ghr/pdb
• 関連するPDBエントリー: 1US0 2I16 2I17 2pev 2pf8 2pfh 3GHS 3GHT 3GHU
• 分子名称: Aldose reductase, NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE, IDD594, ... (5 entities in total)
• 機能のキーワード: oxidoreductase, acetylation, cataract, cytoplasm, nadp, phosphoprotein, polymorphism
• 由来する生物種: Homo sapiens (human)
• 細胞内の位置: Cytoplasm: P15121
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 37252.12

構造登録者

Petrova, T.,Ginell, S.,Hazemann, I.,Mitschler, A.,Podjarny, A.,Joachimiak, A. (登録日: 2009-03-04, 公開日: 2009-03-24, 最終更新日: 2023-09-06)

主引用文献

Petrova, T.,Lunin, V.Y.,Ginell, S.,Hazemann, I.,Lazarski, K.,Mitschler, A.,Podjarny, A.,Joachimiak, A.
X-ray-radiation-induced cooperative atomic movements in protein.
J.Mol.Biol., 387:1092-1105, 2009

PubMed Abstract: X-rays interact with biological matter and cause damage. Proteins and other macromolecules are damaged primarily by ionizing X-ray photons and secondarily by reactive radiolytic chemical species. In particular, protein molecules are damaged during X-ray diffraction experiments with protein crystals, which is, in many cases, a serious hindrance to structure solution. The local X-ray-induced structural changes of the protein molecule have been studied using a number of model systems. However, it is still not well understood whether these local chemical changes lead to global structural changes in protein and what the mechanism is. We present experimental evidence at atomic resolution indicating the movement of large parts of the protein globule together with bound water molecules in the early stages of radiation damage to the protein crystal. The data were obtained from a crystal cryocooled to approximately 100 K and diffracting to 1 A. The movement of the protein structural elements occurs simultaneously with the decarboxylation of several glutamate and aspartate residues that mediate contacts between moving protein structural elements and with the rearrangement of the water network. The analysis of the anisotropy of atomic displacement parameters reveals that the observed atomic movements occur at different rates in different unit cells of the crystal. Thus, the examination of the cooperative atomic movement enables us to better understand how radiation-induced local chemical and structural changes of the protein molecule eventually lead to disorder in protein crystals.

PubMed: 19233199
DOI: 10.1016/j.jmb.2009.02.030

実験手法

X-RAY DIFFRACTION (1 Å)