Mapping of a functional recombination motif that defines isotype specificity for mu-->gamma3 switch recombination implicates NF-kappaB p50 as the isotype-specific switching factor.
Mapping of a functional recombination motif that defines isotype specificity for mu-->gamma3 switch recombination implicates NF-kappaB p50 as the isotype-specific switching factor.
复制标题
定义MU-> gamma3开关重组的同种特异性的功能重组基序的映射暗示NF-kappab P50是同种型特异性开关因子。
DOI:
10.1084/jem.20031935
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发表时间:
2004-03-01
期刊:
影响因子:
--
通讯作者:
Zhang H
中科院分区:
文献类型:
--
作者:
Kenter AL;Wuerffel R;Dominguez C;Shanmugam A;Zhang H
Ig class switch recombination (CSR) requires expression of activation-induced deaminase (AID) and production of germline transcripts to target S regions for recombination. However, the mechanism of CSR remains unclear. Here we show that an extrachromosomal S plasmid assay is AID dependent and that a single consensus repeat is both necessary and sufficient for isotype-specific CSR. Transfected switch substrates specific for μ→γ3 and μ→γ1 are stimulated to switch with lipopolysaccharide (LPS) alone or LPS and interleukin-4, respectively. An Sγ3/Sγ1 substrate containing only three Sγ3-associated nucleotides reconstituted LPS responsiveness and permitted mapping of a functional recombination motif specific for μ→γ3 CSR. This functional recombination motif colocalized with a binding site for NF-κB p50, and p50 binding to this site was previously established. We show a p50 requirement for plasmid-based μ→γ3 CSR using p50-deficient B cells. Switch junctions from p50-deficient B cells showed decreased lengths of microhomology between Sμ and Sγ3 relative to wild-type cells, indicating a function for p50 in the mechanics of CSR. We note a striking parallel between the affects of p50 and Msh2 deficiency on Sμ/Sγ3 junctions. The data suggest that p50 may be the isotype-specific factor in μ→γ3 CSR and epistatic with Msh2.
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影响因子:
56.9
作者:
Celeste, A;Petersen, S;Nussenzweig, A
通讯作者:
Nussenzweig, A
DOI:
10.1084/jem.20001871
发表时间:
2002-12-02
期刊:
The Journal of experimental medicine
影响因子:
--
作者:
Bosma GC;Kim J;Urich T;Fath DM;Cotticelli MG;Ruetsch NR;Radic MZ;Bosma MJ
通讯作者:
Bosma MJ
影响因子:
30.5
作者:
Imai, K;Slupphaug, G;Durandy, A
通讯作者:
Durandy, A
DOI:
10.1073/pnas.241525998
发表时间:
2001-12-04
影响因子:
11.1
作者:
Ehrenstein, MR;Rada, C;Neuberger, MS
通讯作者:
Neuberger, MS
影响因子:
4.4
作者:
Catalan, N;Selz, F;Durandy, A
通讯作者:
Durandy, A