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Mapping Plastid Transcript Population by Circular Reverse Transcription Polymerase Chain Reaction
Florence Courtois1, Livia Merendino2,3
1Laboratoire de Physiologie Cellulaire et Végétale, Centre National de la Recherche Scientifique, Institut National Recherche Agronomique, Commissariat à l'Energie Atomique et aux Energies Alternatives, CEA Grenoble, UMR5168, Université Grenoble Alpes, Grenoble, France. florence.courtois@cea.fr.
Abstract:
During evolution of photosynthetic organisms, the genetic information provided by the internalized cyanobacteria has been transferred to the nucleus. The small genome kept by the chloroplast, the so-called plastome, displays a complex organization, comprising operons under the control of multiples promoters. In addition, polycistronic transcripts undergo multiple processing events, thus generating a complex population of mRNAs from a single gene. This chapter describes a method to investigate the diversity of the mRNA population from a single gene by circular RT-PCR. The protocol provided here allows for the simultaneous mapping of both 5' and 3' ends of the same RNA molecule.
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Transcription
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
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Transcription of prokaryotic...
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There are several different mechanisms used to attenuate transcription. In ribosome mediated...
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The transcription elongation is regulated via pausing of RNA polymerase on several occasions during transcription. In bacteria, these halts are necessary because the transcription of DNA into mRNA is coupled to the translation of that mRNA...

