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Nucleotide deletion of T cell receptor V gamma 2 and J gamma 2 coding sequences at V gamma 2-J gamma 2 junctions in immature B cell lines.

Abstract：

:Immature B cell lines transformed with a temperature-sensitive mutant of Abelson murine leukaemia virus undergo preferentially V gamma 2 to J gamma 2 joinings during culture at a non-permissive temperature (39 degrees C). Here we examined nucleotide addition and deletion at the V gamma 2-J gamma 2 junctions in these V gamma 2 to J gamma 2 joinings, in comparison with the V gamma 2-J gamma 2 junctional sequences reported previously in T cells. Forty-eight V gamma 2-J gamma 2 junctions were PCR-amplified and sequenced. Only three of 48 V gamma 2-J gamma 2 junctions had nucleotide addition. The average nucleotide deletion of V gamma 2 coding sequences at the V gamma 2-J gamma 2 junctions was 6.9 nucleotides in immature B cells and 5.1 nucleotides in T cells (p less than 0.05). Also, the average nucleotide deletion of J gamma 2 coding sequences at the V gamma 2-J gamma 2 junctions was 3.1 nucleotides in immature B cells and 1.9 nucleotides in T cells (p less than 0.01). The average of total number of the deleted nucleotides at the V gamma 2-J gamma 2 junctions was 10.0 nucleotides in immature B cells and 7.0 nucleotides in T cells (p less than 0.01). No correlation was found between the extent of the nucleotide deletion of the V gamma 2 coding sequence and that of the J gamma 2 coding sequence at each V gamma 2-J gamma 2 junction in immature B and T cells. These results demonstrated that nucleotide deletion at the V gamma 2-J gamma 2 junctions was significantly wider in immature B cells than in T cells.

journal_name

Mol Immunol

journal_title

Molecular immunology

authors

Tsukada S,Oka Y,Sugiyama H

doi

10.1016/0161-5890(92)90123-f

subject

Has Abstract

pub_date

1992-07-01 00:00:00

pages

857-61

issue

7-8

eissn

0161-5890

issn

1872-9142

journal_volume

29

pub_type

杂志文章

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