RNA polymerase II transcription in murine cells lacking the TATA binding protein.
Inactivation of the murine TATA binding protein (TBP) gene by homologous recombination leads to growth arrest and apoptosis at the embryonic blastocyst stage. However, after loss of TBP, RNA polymerase II (pol II) remains in a transcriptionally active phosphorylation state, and in situ run-on experiments showed high levels of pol II transcription comparable to those of wild-type cells. In contrast, pol I and pol III transcription was arrested. Our results show a differential dependency of the RNA polymerases on TBP and provide evidence for TBP-independent pol II transcriptional mechanisms that allow reinitiation and maintenance of gene transcription in vivo.
Martianov
Igor
I
Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), CNRS/INSERM/ULP, B.P. 163, 67404 Illkirch Cédex, Communauté Urbaine de Strasbourg, France.
Viville
Stephane
S
Davidson
Irwin
I
D000546:Amanitins / Q000494:pharmacology; D000818:Animals; D017209:Apoptosis; D001755:Blastocyst / Q000378:metabolism; D002455:Cell Division; D002466:Cell Nucleolus / Q000378:metabolism; D003433:Crosses, Genetic; D005314:Embryonic and Fetal Development; D005260:Female; D020868:Gene Silencing; D018390:Gene Targeting; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D018613:Microscopy, Confocal; D010641:Phenotype; D012318:RNA Polymerase I / Q000378:metabolism; D012319:RNA Polymerase II / Q000378:metabolism*; D012320:RNA Polymerase III / Q000378:metabolism; D011995:Recombination, Genetic; D035181:TATA-Box Binding Protein / Q000235:genetics / Q000502:physiology*; D014158:Transcription, Genetic
D000546:Amanitins; D035181:TATA-Box Binding Protein; D012319:RNA Polymerase II; D012318:RNA Polymerase I; D012320:RNA Polymerase III