Displaying Sigma70-like Family from Maize


Members of the sigma70 family of sigma factors are components of the RNA polymerase holoenzyme that direct bacterial or plastid core RNA polymerase to specific promoter elements that are situated 10 and 35 base-pairs upstream of transcription-initiation points (PMID:12540296). Plant plastidal sigma factors are encoded in the nuclear genomes of higher plants, and have an N-terminal transit peptide of 30-60 amino acids for transit through the cytoplasm to the that is cleaved off after delivery into the chloroplast. Plant sigma factors contain a region, essential for transcription, that putatively binds DNA non-template strand downstream -10 box in a sequence specific manner, another DNA binding region that participates in promoter melting without a template, and a region that binds to template strand near ?10 element of promoter. Plant sigma factors are well described in the literature, and there is evidence that they are all expressed and not pseudogenes (PMID:17356883).

Protein Name
accepted / suggested
Gene Locus Synonym/
Gene Name
Clone in TFome Genome Browser
ZmSIG1 GRMZM2G100086 SIG1 View in Browser
ZmSIG2 GRMZM2G164084 SIG2 View in Browser
ZmSIG3 GRMZM2G003182 SIG3 pUT1433 View in Browser
ZmSIG4 GRMZM2G143392 SIG2A View in Browser
ZmSIG5 GRMZM2G543629 SIG1B View in Browser
ZmSIG6 GRMZM2G144196 SIG6 pUT1442 View in Browser
ZmSIG7 GRMZM5G830932 SIG7 pUT5580 View in Browser
ZmSIG8 GRMZM2G077436 SIG8 View in Browser
ZmSIG9 GRMZM2G006736 SIG1A pUT5742 View in Browser