Genetic suppression reveals DNA repair-independent antagonism between BRCA1 and COBRA1 in mammary gland development

Abstract

COBRA1 is a BRCA1-binding protein and, as part of the negative elongation factor, regulates RNA polymerase II pausing and transcription elongation. Here, the authors show that tissue-specific deletion of mouse Cobra1 inhibits postnatal mammary gland development and that the mammary defects can be rescued by additional deletion of Brca1in a DNA repair-independent manner.