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Tic20 is a polytopic protein of the inner envelope membrane of chloroplasts, and it is proposed to act as a translocation channel during chloroplast protein import. By analyzing 29 sequences from diverse organisms, it was evident that Tic20-related proteins form two distinct clades, termed Group 1 and Group 2. The former group includes canonical Tic20 proteins that are essential for chloroplast development, while members of the latter are of unknown function. An increased evolutionary rate, in connection with adaptation to terrestrial life, was detected in Group 1. Interestingly, the sub-cellular (genomic) localization of genes coding for Group 1 proteins differs between evolutionary lineages. © 2011 Landes Bioscience.

Original publication

DOI

10.4161/psb.6.7.15631

Type

Journal article

Journal

Plant Signaling and Behavior

Publication Date

11/07/2011

Volume

6

Pages

128 - 130