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Endosymbiotic origin of mitochondria and plastids

Endosymbiotic origin of mitochondria and plastids. Polycistronic mRNAs. Prokaryotic like mRNA in plastid. Comparison of genome sizes. Huge variation in size of mitochondrial genomes. Plant mitochondrial genomes exist as subgenomic circles. A = Inverted repeats B = Direct repeats.

jonah-contreras
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Endosymbiotic origin of mitochondria and plastids

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  1. Endosymbiotic origin of mitochondria and plastids

  2. Polycistronic mRNAs

  3. Prokaryotic like mRNA in plastid

  4. Comparison of genome sizes

  5. Huge variation in size of mitochondrial genomes

  6. Plant mitochondrial genomes exist as subgenomic circles A = Inverted repeats B = Direct repeats

  7. Smallest mitochondrial genome – most “derived”

  8. Promiscuous DNA

  9. Nucleus and plastid encoded gene products in a single enzyme

  10. Coordinate expression of nuclear and chloroplast genes

  11. Accumulation of Rubisco requires stoichiometric assembly of subunits

  12. Thylakoid proteins are synthesized on membrane bound ribosomes

  13. Steps in the synthesis of a protein – possible points of regulation

  14. Cofactors in PSII

  15. Cytochrome b6f complex with heme and FeS cofactors

  16. Cofactor requirement for stable protein accumulation

  17. Steps in the synthesis of D1- pausing to allow cofactor insertion

  18. Translational regulation of plastid mRNAs via nuclear gene products

  19. Regulation by products of photosynthesis Redox Adenine nucleotides

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