The origin of the eukaryotic cell - PubMed (original) (raw)
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- PMID: 8871398
Comparative Study
The origin of the eukaryotic cell
R S Gupta et al. Trends Biochem Sci. 1996 May.
Abstract
Molecular sequence data are beginning to provide important insights into the evolutionary origin of eukaryotic cells. Global phylogenies of numerous protein sequences indicate that the eukaryotic cell nucleus is a chimera, which has received major contributions from both a Gram-negative eubacterium and an archaebacterium. Recent studies also indicate that the formation of the nuclear envelope and the endoplasmic reticulum was accompanied by duplication of genes for the molecular chaperone proteins (e.g. hsp70, hsp90), which facilitate protein transport across membranes. Based on these observations, it is suggested that the ancestral eukaryotic cell arose by a unique endosymbiotic event involving engulfment of an eocyte archaebacterium by a Gram-negative eubacterial host.
Comment in
- A chimeric origin for eukaryotes re-examined.
Roger AJ, Brown JR. Roger AJ, et al. Trends Biochem Sci. 1996 Oct;21(10):370-2. Trends Biochem Sci. 1996. PMID: 8918189 No abstract available.
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