V(D)J recombination is developmentally regulated in vivo by enhancer -dependent changes in the accessibility of chromosomal recombination signal sequences to the recombinase, but the molecular nature of these changes is unknown. Here histone H3 acetylation was measured along versions of a transgenic V(D)J recombination reporter and the endogenous T cell receptor alpha/delta locus. Enhancer activity was shown to impart tong-range, developmentally regulated changes in H3 acetylation, and H3 acetylation status was tightly linked to V(D)J recombination. H3 hyperacetylation is proposed as a molecular mechanism coupling enhancer activity to accessibiLity for V(D)J recombination.
机构:
Childrens Hosp, Ctr Blood Res, Howard Hughes Med Inst, Boston, MA 02115 USAChildrens Hosp, Ctr Blood Res, Howard Hughes Med Inst, Boston, MA 02115 USA
Bassing, CH
Swat, W
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Childrens Hosp, Ctr Blood Res, Howard Hughes Med Inst, Boston, MA 02115 USAChildrens Hosp, Ctr Blood Res, Howard Hughes Med Inst, Boston, MA 02115 USA
Swat, W
Alt, FW
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Childrens Hosp, Ctr Blood Res, Howard Hughes Med Inst, Boston, MA 02115 USAChildrens Hosp, Ctr Blood Res, Howard Hughes Med Inst, Boston, MA 02115 USA
机构:
NYU, Sch Med, Dept Pathol, New York, NY 10016 USANYU, Sch Med, Dept Pathol, New York, NY 10016 USA
Hewitt, Susannah L.
Chaumeil, Julie
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NYU, Sch Med, Dept Pathol, New York, NY 10016 USANYU, Sch Med, Dept Pathol, New York, NY 10016 USA
Chaumeil, Julie
Skok, Jane A.
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NYU, Sch Med, Dept Pathol, New York, NY 10016 USA
UCL, Div Infect & Immun, Dept Immunol & Mol Pathol, London, EnglandNYU, Sch Med, Dept Pathol, New York, NY 10016 USA