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Article Addendum

The Arabidopsis peroxisome division mutant pdd2 is defective in the DYNAMIN-RELATED PROTEIN3A (DRP3A) gene

Kyaw Aung and Jianping Hu

In plants, the division of peroxisomes is mediated by several classes of proteins, including PEROXIN11 (PEX11), FISSION1 (FIS1), and DYNAMIN-RELATED PROTEIN3 (DRP3). DRP3A and DRP3B are two homologous dynamin-related proteins playing overlapping roles in the division of both peroxisomes and mitochondria, with DRP3A performing a stronger function than DRP3B in peroxisomal fission. Here, we report the identification and characterization of the peroxisome division defective 2 (pdd2) mutant, which was later proven to be another drp3A allele. The pdd2 mutant generates a truncated DRP3A protein and exhibits pale green and retarded growth phenotypes. Intriguingly, this mutant displays much stronger peroxisome division deficiency in root cells than in leaf mesophyll cells. Our data suggest that the partial GTPase effector domain retained in pdd2 may have contributed to the distinct mutant phenotype of this mutant.

Addendum to: Zhang X, Hu J. Two small protein families, DYNAMIN-RELATED PROTEIN3 and FISSION1, are required for peroxisome fission in Arabidopsis. Plant J 2009; 57:146-59; PMID: 18785999; DOI: 10.1111/j.1365-313X.2008.03677.x.

Authors

Kyaw Aung

Department of Energy Plant Research Laboratory and Plant Biology Department; Michigan State University; East Lansing, MI USA

Jianping Hu Corresponding author: huji@msu.edu

Department of Energy Plant Research Laboratory and Plant Biology Department; Michigan State University; East Lansing, MI USA