TASLは,TLR7-9によるIRF5活性化のためのSLC15A4関連アダプターです
Leonhard X Heinz1, JangEun Lee2, Utkarsh Kapoor1
1CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria.
Nature
|May 21, 2020
まとめ
研究者達は新しいタンパク質 TASL を発見しました これは先天的な免疫に不可欠です TASLは,内分泌体内のトール型受容体 (TLR) とIRF5の活性化を結びつけ,全身性白血病におけるその役割を説明する.
科学分野:
- 免疫学
- 分子生物学
- 遺伝学
背景:
- トール型受容体 (TLR) は病原体の認識と免疫応答の開始に不可欠です.
- システミック・ルプス・エリテマトーサス (SLE) は遺伝的要因と免疫系不調に関連しています.
- SLC15A4は,自己免疫疾患に関与する内溶性TLR機構の構成要素である.
研究 の 目的:
- CXorf21によってコードされる新しいタンパク質とその内溶性TLRシグナル伝達における役割を特徴付ける.
- CXorf21,SLC15A4,および先天性免疫応答の相互作用を明らかにする.
- これらの成分に関連したSLEの病原性に基づく分子機構を理解する.
主な方法:
- SLC15A4の結合パートナーを特定するためのタンパク質相互作用研究
- タンパク質の機能を評価するためのヒト免疫細胞における遺伝子消去と変異.
- TLRアゴニスト刺激による下流信号経路 (IRF,NF-κB,MAPK) の分析
主要な成果:
- 新しいタンパク質であるTASL (ライソソーム上のSLC15A4と相互作用するTLRアダプター) が特定されました.
- TASLはSLC15A4と相互作用し,内溶性TLR応答に不可欠である.
- TASLは,TLR7/8/9とIRF5をリンクするpLxISモチーフを通じて,IRF経路の活性化を特異的に媒介する.
結論:
- TASLは,エンドリソーム性TLR (TLR7,TLR8,TLR9) の重要な先天性免疫アダプタとして作用する.
- TASL- SLC15A4の相互作用は,TASLの局所化と免疫シグナル伝達における機能にとって重要である.
- この発見は,内分泌体TLRのシグナリング成分と全身性白血病のメカニズム的な関連性を示しています.
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