NIH R01 · 2024
Elucidating Mechanisms of RAG Endonuclease Mediated Feedback Inhibition of V(D)J Recombination
PROJECT SUMMARY/ABSTRACT A hallmark of adaptive immunity is mono-allelic expression (allelic exclusion) of B and T cell antigen receptor proteins, which is thought to allow highly-specific immune responses and inhibit autoimmunity. Allelic exclusion is achieved via mono-allelic initiation of RAG1/RAG2 (RAG) nuclease-mediated V gene segment recombination, followed by protein from a V(D)J rearrangement signaling permanent feedback inhibition of V recombination on the other allele. A shortcoming of this control is that it needs time for completion of recombination, expression and signaling of protein, and changes on the second allele. The applicant demonstrated that RAG DNA double strand…
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