Shedding light on the chloroplast protein import machinery

Article Abstract:

Protein transport across the chloroplast envelope is controlled by the outer envelope membrane proteins (OEPs) and the import intermediate-associated proteins (IAPs). Protein precursors first bind to the outer membrane and then target the translocation machinery by using a complex composed of OEP/IAP34, OEP/IAP86, OEP/IAP75 and Hsp70 IAP. The precursors proceed into the stroma and their transit sequences are removed. This transport differs from the mitochondrial transport as the proteins controlling the transport are structurally different and there is absence of any membrane potential.

Research, Observations, Chloroplasts, Plant proteins

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Peroxisomal protein import: the paradigm shifts

Article Abstract:

This review examines the classical model of intracellular trafficking systems involved in the targeting of newly synthesized proteins to cognate cellular locations during organelle biogenesis. Research on peroxisomal protein import shows that peroxisomal matrix proteins are synthesized outside the organelle and subsequently imported into the organelle, a deviation from the conventional model.

Models, Peroxisomes, Cell organelles, Organelles

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Prions affect the appearance of other prions: the story of [PIN(sup)+]

Article Abstract:

Results reveal that formation of new prions is enhanced by heterologous prion aggregates as evidenced by the de novo appearance of Rnq1::GFP prion aggregates requiring the presence of other prions. Furthermore, the yeast non-Mendelian trait [PIN(sup)+] forms [PSI(sup)+] prion.

Statistical Data Included, Prions, Prions (Proteins), Creutzfeldt-Jakob disease, Prion diseases

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