Three-dimensional envelope and subunit interactions of the plastid-encoded rna polymerase from sinapis alba

HIGHLIGHTS

SUMMARY

    DNA-dependent RNA_polymerases (RNAPs) are central enzymes of gene_expression, which transcribe the genetic_information encoded in DNA into single-stranded RNAs, some of which are suitable for translation. Eubacterial multimeric RNAPs share a common catalytic core composed of two large subunits called β and β`, a dimer of α subunits and a monomer of the ω subunit. Transcription of the plastome involves a single-subunit nuclear-encoded T3/T7 phagetype RNA_polymerase (NEP) and the multi-subunit plastid-encoded prokaryotic-type RNA_polymerase (PEP). Some plastid genes possess promoters for NEP and PEP so that they can be transcribed by both . . .

     

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