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11 Gene Family Correlates with Sequence Polymorphism1
Department of Immunology, The Scripps Research Institute, La Jolla, CA 92037
Previous staining studies with TCR V
11-specific mAbs showed that
V
11.1/11.2 (AV11S1 and S2) expression was selectively favored in the
CD4+ peripheral T cell population. As this phenomenon was
essentially independent of the MHC haplotype, it was suggested that
AV11S1 and S2 TCRs exert a preference for recognition of class II MHC
molecules. The V
segment of the TCR
-chain is suggested to have a
primary role in shaping the T cell repertoire due to selection for
class I or II molecules acting through the complementarity determining
regions (CDR) 1
and CDR2
residues. We have analyzed the
repertoire of V
11 family members expressed in C57BL/6 mice and have
identified a new member of this family; AV11S8. We show that, whereas
AV11S1 and S2 are more frequent in CD4+ cells, AV11S3 and
S8 are more frequent in CD8+ cells. The sequences in the
CDR1
and CDR2
correlate with differential expression in
CD4+ or CD8+ cells, a phenomenon that is also
observed in BALB/c mice. With no apparent restriction in TCR J
usage
or CDR3
length in C57BL/6, these findings support the idea of
V
-dependent T cell repertoire selection through preferential
recognition of MHC class I or class II
molecules.
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