Sequence and Structural Analyses Reveal Distinct and Highly Diverse Human CD8⁺ TCR Repertoires to Immunodominant Viral Antigens.

ABSTRACT: A diverse T cell receptor (TCR) repertoire is essential for controlling viral infections. However, information about TCR repertoires to defined viral antigens is limited. We performed a comprehensive analysis of CD8⁺ TCR repertoires for two dominant viral epitopes: pp65_495-503 (NLV) of cytomegalovirus and M1_58-66 (GIL) of influenza A virus. The highly individualized repertoires (87-5,533 α or β clonotypes per subject) comprised thousands of unique TCRα and TCRβ sequences and dozens of distinct complementary determining region (CDR)3α and CDR3β motifs. However, diversity is effectively restricted by preferential V-J combinations, CDR3 lengths, and CDR3α/CDR3β pairings. Structures of two GIL-specific TCRs bound to GIL-HLA-A2 provided a potential explanation f

SUBMITTER: Chen G 

PROVIDER: S-EPMC5472051 | biostudies-literature | 2017 Apr

REPOSITORIES: biostudies-literature