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Gene Review

APG2  -  Sec-independent protein translocase...

Arabidopsis thaliana

Synonyms: ALBINO AND PALE GREEN 2, F23H14.8, F23H14_8, PGA2, TATC, ...
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High impact information on APG2

  • Immunoblot analysis detected no thylakoid membrane proteins such as D1, light-harvesting complex, and OE23 in apg2 plastids, whereas soluble proteins such as rubisco large and small subunits were not decreased [1].
  • The apg2 plastids were highly vacuolated, lacked internal membrane structures and lamellae of the thylakoid membrane, and contained many densely stained globule structures, like undifferentiated proplastids [1].
  • The APG2 gene product (named cpTatC) has sequence similarity with bacterial TatC and contains six putative transmembrane domains, including bacterial TatC proteins and a transit peptide in its N terminus. apg2 mutants showed albino phenotypes and could not grow in soil [1].


  1. An essential role of a TatC homologue of a Delta pH- dependent protein transporter in thylakoid membrane formation during chloroplast development in Arabidopsis thaliana. Motohashi, R., Nagata, N., Ito, T., Takahashi, S., Hobo, T., Yoshida, S., Shinozaki, K. Proc. Natl. Acad. Sci. U.S.A. (2001) [Pubmed]
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