Demonstration of nucleomorph-encoded eukaryotic small subunit ribosomal RNA in cryptomonads - PubMed (original) (raw)
. 1991 Nov;230(1-2):155-60.
doi: 10.1007/BF00290663.
Affiliations
- PMID: 1720859
- DOI: 10.1007/BF00290663
Demonstration of nucleomorph-encoded eukaryotic small subunit ribosomal RNA in cryptomonads
U G Maier et al. Mol Gen Genet. 1991 Nov.
Abstract
In cryptomonads, unicellular phototrophic flagellates, the plastid(s) is (are) located in a special narrow compartment which is bordered by two membranes; it harbours neither mitochondria nor Golgi dictyosomes but comprises eukaryotic ribosomes and starch grains together with a small organelle called the nucleomorph. The nucleomorph contains DNA and is surrounded by a double membrane with pores. It is thought to be the vestigial nucleus of a phototrophic eukaryotic endosymbiont. Cryptomonads are therefore supposed to represent an intermediate state in the evolution of complex plastids from endosymbionts. We have succeeded in isolating pure nucleomorph fractions, and can thus provide, using pulsed field gel electrophoresis, polymerase chain reaction and sequence analysis, definitive proof for the eukaryotic nature of the symbiont and its phylogenetic origin.
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References
- Nature. 1989 May 11;339(6220):142-4 - PubMed
- Nature. 1991 Mar 14;350(6314):148-51 - PubMed
- Mol Biol Evol. 1987 Jul;4(4):406-25 - PubMed
- J Mol Evol. 1983;19(6):411-9 - PubMed
- Nucleic Acids Res. 1991 Apr 25;19(8):1779-81 - PubMed