Structural similarities between viroids and transposable genetic elements.
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چکیده
منابع مشابه
Structural similarities between viroids and transposable genetic elements.
The primary structures of the tomato planta macho and tomato apical stunt viroids have been determined, and probable secondary structures are proposed. Both viroids can assume the rodlike conformation with extensive base-pairing characteristic of all known viroids. Sequence homologies between the two viroids (75%) and with members of the potato spindle tuber viroid group (73-83%) indicate that ...
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N atural selection, as Darwin rec ognized more than a centu ry ago, favors individuals and populations that acquire traits con ducive to survival and reproduction. The generation of biological variation, which gives rise to new and potentially advantageous combinations of genetic traits, is therefore a central requirement for the successful evolution of species in diverse and changing enviro...
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M proteins of the group A streptococcus, despite their well-recognized immunological variations, have the unique capacity of maintaining a common antiphagocytic function for the organism. Antibodies to M proteins, however, are capable of neutralizing the antiphagocytic activity of these molecules (1-3). Although, immunological cross-reactions between different M types have been observed (4-6), ...
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Although both genotypes with elevated mutation rate (mutators) and mobilization of insertion sequence (IS) elements have substantial impact on genome diversification, their potential interactions are unknown. Moreover, the evolutionary forces driving gradual accumulation of these elements are unclear: Do these elements spread in an initially transposon-free bacterial genome as they enable rapid...
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Transposable elements subvert host cellular functions to ensure their survival. Their interaction with the host DNA replication machinery indicates that selective pressures lead them to develop ancestral and convergent evolutionary adaptations aimed at conserved features of this fundamental process. These interactions can shape the co-evolution of the transposons and their hosts.
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 1983
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.80.20.6234