Open AccessGenetic polymorphism and exon changes of the constant regions of the human T-cell rearranging gene gamma.
Author(s) -
MariePaule Lefranc,
A. Förster,
Terence H. Rabbitts
Publication year - 1986
Publication title -
proceedings of the national academy of sciences of the united states of america
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.011
H-Index - 771
eISSN - 1091-6490
pISSN - 0027-8424
DOI - 10.1073/pnas.83.24.9596
Subject(s) - exon , gene , genetics , biology , coding region , allele , gene duplication , microbiology and biotechnology
The genomic nucleotide sequences of the constant-region (C) genes of the human T-cell rearranging gene gamma are given. These sequences show considerable allelic and nonallelic variation. Allelic variants exist at both C gamma 1 and C gamma 2 loci in coding regions (as well as in restriction enzyme sites). Both C gamma genes are in the same transcriptional orientation. Moreover, the organization of the nonallelic C gamma genes reveals some interesting features: the C gamma 1 gene, like the mouse C gamma gene, has three exons, whereas the C gamma 2 gene has four exons, including a duplicated second exon that would create a putative protein with an enlarged constant region. However, these two duplicated exons in C gamma 2 have lost the cysteine residue that is thought to be involved in the interchain disulfide bridge.