Advertisement
Sigma-Aldrich
Sigma-Aldrich

The Plastid Gene Shuffle

How plastid genetic information survived (or didn’t) the endosymbiotic experience

By | January 1, 2013

Early in plastid evolution, many endosymbiont-derived genes were lost (1) and others migrated to the host nuclear genome (2) through a process called endosymbiont gene transfer. Plastid-harboring eukaryotes then had to devise a system to target the protein products of these transferred endosymbiont genes back to the plastid. Their solution was to attach plastid-targeting peptides to the N-terminus of these proteins (3), which direct them from the cytoplasm to the plastid and across its outer and inner membranes. This plastid-protein targeting system also involved the evolution of complex multiprotein translocon import channels within the plastid membranes that recognize targeting peptides (4). Finally, the host cell has devised ways to export the riches of photosynthesis and other plastid-derived molecules from the plastid into the cytosol (5), where they act as the substrate for the synthesis of other important organic molecules, such as glucose.

Read the full story.

Advertisement

Add a Comment

Avatar of: You

You

Processing...
Processing...

Sign In with your LabX Media Group Passport to leave a comment

Not a member? Register Now!

LabX Media Group Passport Logo
Advertisement
BD Biosciences
BD Biosciences

Popular Now

  1. Neanderthals’ Genetic Legacy
  2. Turning Tumor Cells Against Cancer
  3. Brazil’s Pre-Zika Microcephaly Cases
    The Nutshell Brazil’s Pre-Zika Microcephaly Cases

    A review of four years’ worth of medical records finds far greater numbers of microcephaly cases from before the ongoing Zika virus epidemic than had been officially reported.

  4. The Mycobiome
    Features The Mycobiome

    The largely overlooked resident fungal community plays a critical role in human health and disease.

Advertisement
Advertisement
Life Technologies