Lack of conservation of bacterial type promoters in plastids of Streptophyta.
We demonstrate the scarcity of conserved bacterial-type promoters in plastids of Streptophyta and report widely conserved promoters only for genes psaA, psbA, psbB, psbE, rbcL. Among the reasonable explanations are: evolutionary changes of sigma subunit paralogs and phage-type RNA polymerases possibly entailing the loss of corresponding nuclear genes, de novo emergence of the promoters, their loss together with plastome genes; functional substitution of the promoter boxes by transcription activation factor binding sites.
Lyubetsky
Vassily A
VA
Institute for Information Transmission Problems of the Russian Academy of Sciences, Moscow, 127994, Russia. lyubetsk@iitp.ru
Rubanov
Lev I
LI
Seliverstov
Alexandr V
AV
D019843:Archaeal Proteins / Q000235:genetics; D000460:Chlorophyta / Q000235:genetics*; D018087:Plastids / Q000235:genetics*; D011401:Promoter Regions, Genetic / Q000235:genetics*
D019843:Archaeal Proteins
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