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基本情報
登録情報 | データベース: SASBDB / ID: SASDEZ6 |
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![]() | Gamma-crystallin S disulfide-linked dimer
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機能・相同性 | ![]() structural constituent of eye lens / lens development in camera-type eye / ![]() 類似検索 - 分子機能 |
生物種 | ![]() ![]() |
![]() | ![]() タイトル: The Structure and Stability of the Disulfide-Linked γS-Crystallin Dimer Provide Insight into Oxidation Products Associated with Lens Cataract Formation. 著者: David C Thorn / Aidan B Grosas / Peter D Mabbitt / Nicholas J Ray / Colin J Jackson / John A Carver / ![]() 要旨: The reducing environment in the eye lens diminishes with age, leading to significant oxidative stress. Oxidation of lens crystallin proteins is the major contributor to their destabilization and ...The reducing environment in the eye lens diminishes with age, leading to significant oxidative stress. Oxidation of lens crystallin proteins is the major contributor to their destabilization and deleterious aggregation that scatters visible light, obscures vision, and ultimately leads to cataract. However, the molecular basis for oxidation-induced aggregation is unknown. Using X-ray crystallography and small-angle X-ray scattering, we describe the structure of a disulfide-linked dimer of human γS-crystallin that was obtained via oxidation of C24. The γS-crystallin dimer is stable at glutathione concentrations comparable to those in aged and cataractous lenses. Moreover, dimerization of γS-crystallin significantly increases the protein's propensity to form large insoluble aggregates owing to non-cooperative domain unfolding, as is observed in crystallin variants associated with early-onset cataract. These findings provide insight into how oxidative modification of crystallins contributes to cataract and imply that early-onset and age-related forms of the disease share comparable development pathways. |
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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ダウンロードとリンク
-モデル
モデル #2528 | ![]() タイプ: dummy / ダミー原子の半径: 2.25 A / カイ2乗値: 1.356 / P-value: 0.648769 ![]() |
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モデル #2569 | ![]() タイプ: atomic / カイ2乗値: 4.792 ![]() |
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試料
![]() | 名称: Gamma-crystallin S disulfide-linked dimer / 試料濃度: 6 mg/ml |
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バッファ | 名称: 20 mM sodium phosphate / pH: 7 |
要素 #1339 | タイプ: protein / 記述: Gamma-crystallin S / 分子量: 21.007 / 分子数: 2 / 由来: Homo sapiens / 参照: UniProt: P22914 配列: MSKTGTKITF YEDKNFQGRR YDCDCDCADF HTYLSRCNSI KVEGGTWAVY ERPNFAGYMY ILPQGEYPEY QRWMGLNDRL SSCRAVHLPS GGQYKIQIFE KGDFSGQMYE TTEDCPSIME QFHMREIHSC KVLEGVWIFY ELPNYRGRQY LLDKKEYRKP IDWGAASPAV QSFRRIVE |
-実験情報
ビーム | 設備名称: Australian Nuclear Science and Technology Organisation/Australian Centre for Neutron Scattering Bruker Nanostar II 地域: Sydney / 国: Australia ![]() ![]() | |||||||||||||||||||||||||||||||||||||||
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検出器 | 名称: Bruker Hi-Star / タイプ: multiwire | |||||||||||||||||||||||||||||||||||||||
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