インヴァリアントチェーンは,外因的および内因的な抗原プレゼンテーション経路を区別する
L Teyton1, D O'Sullivan, P W Dickson
1Department of Immunology, Research Institute of Scripps Clinic, La Jolla, California 92037.
Nature
|November 1, 1990
まとめ
クラスIとIIのメジャー・ヒストコンパティビリティ・コンプレックス (MHC) 分子は,異なるペプチド源を呈する. インヴァリアントチェーンとは
科学分野:
- 免疫学 免疫学とは
- 分子生物学は分子生物学である.
背景:
- メジャー・ヒストコンパティビリティ・コンプレックス (MHC) の分子は,免疫反応にとって極めて重要です.
- クラスIのMHCは内生ペプチドを呈し,クラスIIのMHCは外生ペプチドを呈する.
- このプレゼンテーション経路は,関連するタンパク質によって調節されます.
研究 の 目的:
- MHCクラスIIペプチド負荷におけるインヴァリアント鎖の役割を明らかにする.
- MHCクラスIとIIのペプチド獲得における二分法の分子基礎を理解する.
主な方法:
- MHCクラスIIの分子と不変連鎖の関連性を調査した.
- この関連がエンドプラズマ網膜におけるペプチド結合に及ぼす影響を調査した.
主要な成果:
- インヴァリアント鎖は,エンドプラズマ網膜のMHCクラスII分子と結合する.
- この結合は,内生ペプチドがMHCクラスIIと結合することを防ぐ.
- MHCクラスIIに結合するペプチドと不変連鎖は,互いを排斥する.
結論:
- 不変連鎖は,MHCクラスII分子によって提示されるペプチドの源を決定する.
- インヴァリアント・チェーン・アソシエーションのメカニズムは,自己免疫疾患における潜在的な役割を示唆している.
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