人間のT細胞抗原受容体は,完全なV遺伝子を生成するために再編成される変数,多様性,結合遺伝子セグメントによってコード化されています
Cell
|June 1, 1984
まとめ
研究者らは,T細胞抗原受容体内の新しい遺伝子セグメントを特定し,免疫グロブリン多様性 (D) 遺伝子に類似しています. この発見は,免疫グロブリン重鎖変異遺伝子に似た3つの部分V(D) J遺伝子組立メカニズムを明らかにしています.
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.
- 遺伝学 遺伝学とは
背景:
- 免疫グロブリン遺伝子は,適応免疫に不可欠です.
- T細胞抗原受容体 (TCRs) は,T細胞の認識を媒介する.
- 人間のT細胞からのYT35cDNAクローンは,免疫グロブリン遺伝子領域とのホモロジーを示しています.
研究 の 目的:
- T細胞抗原受容体V遺伝子の遺伝子構造を調査する.
- YT35 cDNA配列を構成する遺伝子セグメントを特定する.
- TCR V遺伝子の組み立てメカニズムを理解するために.
主な方法:
- 人間のT細胞腫瘍RNAからcDNA合成.
- ヒトコスミッドライブラリから生殖線VとJの遺伝子セグメントの分離と配列決定.
- 配列分析は,cDNAと生殖線配列を比較するためのものです.
主要な成果:
- YT35のcDNAクローンは,免疫グロブリンV,J,C領域に同類する配列を含んでいる.
- 細菌系VとJの遺伝子セグメントは,cDNAのVとJの間で発見された14のヌクレオチドを考慮していません.
- 免疫グロブリンDセグメントに類似する第三の遺伝子セグメントが,これらの14のヌクレオチドをコードすると仮定されています.
結論:
- T細胞抗原受容体V遺伝子は,V,D,Jの3つの遺伝子セグメントから構成されています.
- このV(D) J組立メカニズムは,免疫グロブリン重鎖V遺伝子と非常に似ています.
- この発見は,T細胞受容体多様性の遺伝的根拠についての洞察を提供します.
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