Glynn, Jonathan M. , Osteryoung, Katherine .
The FtsZ2-binding region of ARC6 shares features with distantly-related FtsZ-binding proteins.
Chloroplasts are organelles that evolved through an endosymbiotic relationship between a eukaryote and a cyanobacterium. Like their cyanobacterial ancestors, chloroplasts divide by binary fission. However, replication of the organelle requires factors of both eukaryotic and prokaryotic origin. Plant FtsZ2 is most closely related to cyanobacterial FtsZ and has been shown to interact with the plastid division protein ARC6, an ortholog of the cyanobacterial cell division protein Ftn2. In order to determine the role of ARC6 as an FtsZ assembly regulator in plastid division, we sought to identify the discrete regions of ARC6 that bind to FtsZ2. Using approaches in yeast and transgenic Arabidopsis, we show that ARC6 binds FtsZ2 family members through a 152 amino acid domain. Additionally, our molecular model of this domain leads us to believe that this portion of ARC6 may share structural similarity with distantly related FtsZ-binding proteins.
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1 - Michigan State University, Genetics Program, 339 Plant Biology, East Lansing, Michigan, 48824, USA
2 - Michigan State University, Plant Biology
Presentation Type: Plant Biology Abstract
Location: Exhibit Hall (Northeast, Southwest & Southeast)/Hilton
Date: Sunday, July 8th, 2007
Time: 8:00 AM