Erratum: Mitochondrial and plastid evolution in eukaryotes: an outsiders' perspective

Abstract

On page 499 of the above article, an error was introduced into the section entitled "Reprogramming the IM permeome." The sentence in the published version that reads "These data show a major transition in organellogenesis that occurred when the hosts replaced all previous IM solute transporters of the endosymbionts with eukaryote-derived nuclearencoded solute carriers" should refer to the replacement of "most previous IM solute transporters". The editors apologize for the error.

The Plant Mitochondrial Carrier Family: Functional and Evolutionary Aspects

“…This feature is traced back to their endosymbiotic ancestry from Gram-negative bacteria. The inner organelle membrane represents the former bacterial plasma membrane and the outer organelle membrane descended from the outer bacterial membrane (Cavalier-Smith, 2000; Gross and Bhattacharya, 2009a). Similar to the situation in Gram-negative bacteria, the outer membrane of mitochondria and plastids harbors mainly β-barrel proteins and allows a rather unselective passage of several, small molecules.…”

“…Similar to the situation in Gram-negative bacteria, the outer membrane of mitochondria and plastids harbors mainly β-barrel proteins and allows a rather unselective passage of several, small molecules. The inner organellar or bacterial membrane constitutes the permeability barrier and harbors carriers mediating a highly specific and selective solute transfer (Cavalier-Smith, 2000; Gross and Bhattacharya, 2009a). Accordingly, bacterial transport systems were already present in the ancient organelle.…”

“…Specific transport systems for solute and protein import into the symbiont were required to compensate for its genetic deficits and to functionally embed the organelle into the host. Pre-existing transport systems in the two surrounding membranes had to be adapted or new systems had to be established prior to or at least synchronously with the transfer of symbiotic genes to the nucleus (Gross and Bhattacharya, 2009a,b; Alcock et al, 2010; Bohnsack and Schleiff, 2010). Moreover, targeting of nuclear encoded proteins to the mitochondrion or plastid and their passage through the two membranes had to be established, guaranteed, and controlled.…”

“…Moreover, targeting of nuclear encoded proteins to the mitochondrion or plastid and their passage through the two membranes had to be established, guaranteed, and controlled. Protein import systems of mitochondria and plastids consist of specialized translocase complexes in the inner and in the outer membrane (Gross and Bhattacharya, 2009a,b; Alcock et al, 2010; Bohnsack and Schleiff, 2010; Lithgow and Schneider, 2010). An N-terminal extension generally characterizes nuclear encoded proteins with plastidial destination and also several mitochondrial proteins are initially synthesized with mitochondrial presequences that serve as matrix-targeting signals (Lithgow, 2000; Bruce, 2001; Patron and Waller, 2007).…”

“…However, the nature of the host is uncertain and still debated (de Duve, 2007; Gross and Bhattacharya, 2009a). The hydrogen hypothesis describes metabolic interaction and tight association as a possible reason for the fusion of a facultative aerobic alpha-proteobacterium with an anaerobic methane-producing Archaean (Martin and Müller, 1998).…”