title: The rpoD1 gene of Synechococcus sp. strain PCC 7942 encodes the principal sigma factor of RNA polymerase.
abstract: RNA polymerase was purified from the unicellular cyanobacterium, Synechococcus sp. strain PCC 7942, and found to be associated with a 52 kilodalton (kDa) polypeptide. The determined N-terminal sequence of the polypeptide was identical to the predicted amino-acid sequence of the rpoD1 gene product. Furthermore, the rpoD1 gene is suggested to be indispensable for viability by the inability to disrupt the gene. These results indicate that the rpoD1 gene product is the principal sigma factor of RNA polymerase.
authors.affiliation: Institute of Molecular and Cellular Biosciences, The University of Tokyo, Bunkyo-ku, Tokyo 113, Japan.
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Sugimoto
authors.forename: Kan
authors.initials: K
authors.lastname: Tanaka
authors.forename: Susumu
authors.initials: S
authors.lastname: Masuda
authors.forename: Hideo
authors.initials: H
authors.lastname: Takahashi