An Arabidopsis Homolog of the Bacterial Cell Division Inhibitor SulA Is Involved in Plastid DivisionW⃞

AUTOR(ES)

Raynaud, Cécile

FONTE

American Society of Plant Biologists

RESUMO

Plastids have evolved from an endosymbiosis between a cyanobacterial symbiont and a eukaryotic host cell. Their division is mediated both by proteins of the host cell and conserved bacterial division proteins. Here, we identified a new component of the plastid division machinery, Arabidopsis thaliana SulA. Disruption of its cyanobacterial homolog (SSulA) in Synechocystis and overexpression of an AtSulA-green fluorescent protein fusion in Arabidopsis demonstrate that these genes are involved in cell and plastid division, respectively. Overexpression of AtSulA inhibits plastid division in planta but rescues plastid division defects caused by overexpression of AtFtsZ1-1 and AtFtsZ2-1, demonstrating that its role in plastid division may involve an interaction with AtFtsZ1-1 and AtFtsZ2-1.

Documentos Relacionados

• The Role of the Arabidopsis E2FB Transcription Factor in Regulating Auxin-Dependent Cell DivisionW⃞
• Arabidopsis WPP-Domain Proteins Are Developmentally Associated with the Nuclear Envelope and Promote Cell DivisionW⃞
• A lacZ-ftsZ gene fusion is an analog of the cell division inhibitor sulA.
• Crystal structure of the SOS cell division inhibitor SulA and in complex with FtsZ
• Proteolysis and modulation of the activity of the cell division inhibitor SulA in Escherichia coli lon mutants.