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J. Bacteriol., Mar 1996, 1320-1327, Vol 178, No. 5
W Margolin, R Wang and M Kumar
We have isolated a homolog of the cell division gene ftsZ from the
extremely halophilic archaebacterium Halobacterium salinarium. The
predicted protein of 39 kDa is divergent relative to eubacterial homologs,
with 32% identity to Escherichia coli FtsZ. No other eubacterial cell
division gene homologs were found adjacent to H. salinarium ftsZ.
Expression of the ftsZ gene region in H. salinarium induced significant
morphological changes leading to the loss of rod shape. Phylogenetic
analysis demonstrated that the H. salinarium FtsZ protein is more related
to tubulins than are the FtsZ proteins of eubacteria, supporting the
hypothesis that FtsZ may have evolved into eukaryotic tubulin.
Copyright © 1996, American Society for Microbiology
Isolation of an ftsZ homolog from the archaebacterium Halobacterium salinarium: implications for the evolution of FtsZ and tubulin
Department of Microbiology and Molecular Genetics, University of Texas Medical School, Houston 77030, USA.
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