title: Protein import into chloroplasts.
abstract: Three proteins from the chloroplastic outer envelope membrane and four proteins from the inner envelope membrane have been identified as components of the chloroplastic protein import apparatus. Multiple molecular chaperones and a stromal processing peptidase are also important components of the import machinery. The interactions of these proteins with each other and with the precursors destined for transport into chloroplasts are gradually being described using both biochemical and genetic strategies. Homologs of some transport components have been identified in cyanobacteria suggesting that at least some of import machinery was inherited from the cyanobacterial ancestors that gave rise to chloroplasts.
authors.affiliation: MSU-Department of Energy Plant Research Laboratory, Michigan State University, East Lansing, MI 48824-1312, USA. keegstra@pilot.msu.edu
authors.forename: K
authors.initials: K
authors.lastname: Keegstra
authors.forename: J E
authors.initials: JE
authors.lastname: Froehlich
mesh_terms: D001692:Biological Transport; D002736:Chloroplasts / Q000378:metabolism*; D007425:Intracellular Membranes / Q000378:metabolism; D010940:Plant Proteins / Q000378:metabolism*; D011498:Protein Precursors / Q000378:metabolism
chemical_list: D010940:Plant Proteins; D011498:Protein Precursors