Photosynthetica, 2013 (vol. 51), issue 1

Photosynthetica 2013, 51(1):45-54 | DOI: 10.1007/s11099-012-0078-7

Phenotypes of Alb3p and carotenoid synthesis mutants show similarities regarding light sensitivity, thylakoid structure and protein stability

M. Kugelmann1, A. Fausser1, F. Ossenbühl1, A. Brennicke1,*
1 Molekulare Botanik, Universität Ulm, Ulm, Germany

Chloroplast proteins of the Alb3/YidC/Oxa1p family are necessary for assembly of photosynthetic complexes in the thylakoid membranes. Alb3p in Arabidopsis thaliana is essential for posttranslational LHCII-integration into thylakoid membranes and participates in cotranslational assembly of D1. However, the pleiotropic defects of an Alb3p mutant, albino3, suggest additional functions for Alb3p. To obtain an impression of such potential further Alb3p activities from phenotypic manifestations, properties of mutants disturbed in thylakoid membrane protein transport or carotenoid biosynthesis were compared with the albino3 mutant. Specific defects observed in albino3 were similar to those in a carotenoid synthesis mutant. While this correlation did not provide tangible evidence for Alb3p being involved in the integration of carotenoids in photosynthetic complexes, it suggests a possible avenue for future investigations.

Keywords: albino3; Arabidopsis thaliana; carotenoids; hcf106; protein transport; thylakoid membrane

Received: April 5, 2012; Accepted: November 6, 2012; Published: March 1, 2013Show citation

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Kugelmann, M., Fausser, A., Ossenbühl, F., & Brennicke, A. (2013). Phenotypes of Alb3p and carotenoid synthesis mutants show similarities regarding light sensitivity, thylakoid structure and protein stability. Photosynthetica, 51(1), 45-54. doi: 10.1007/s11099-012-0078-7.
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