Comparative Analysis of Alternating Purine-Pyrimidine Tracts and Potential Z-DNA Sequences inDNA Plant Viruses

Rollo, F.; Amici, A.; Mancini, Giorgio

doi:10.1007/BF02102480

The DNAs of several plant viruses were analyzed for the presence of alternating purine-pyrimidine sequences that can potentially undergo B to Z transition. The DNA of the caulimoviruses (plant retroviruses) was compared with that of the geminiviruses, with the cDNA of an RNA plant virus, and with several computer-generated random sequences. Our analysis indicates that potential Z-DNA sites tend to be restricted in the DNA of the caulimoviruses, whereas the same does not occur significantly in the other viral DNAs examined. This result is discussed in relation to the mode of replication of the caulimoviral DNA and offers additional evidence of the existence of selection processes regulating the frequency and distribution of the Z-DNA sites in the different genomes.

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Titolo:	Comparative Analysis of Alternating Purine-Pyrimidine Tracts and Potential Z-DNA Sequences inDNA Plant Viruses
Autori:	F. Rollo AMICI, Augusto MANCINI, Giorgio mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	1989
Rivista:	JOURNAL OF MOLECULAR EVOLUTION
Abstract:	The DNAs of several plant viruses were analyzed for the presence of alternating purine-pyrimidine sequences that can potentially undergo B to Z transition. The DNA of the caulimoviruses (plant retroviruses) was compared with that of the geminiviruses, with the cDNA of an RNA plant virus, and with several computer-generated random sequences. Our analysis indicates that potential Z-DNA sites tend to be restricted in the DNA of the caulimoviruses, whereas the same does not occur significantly in the other viral DNAs examined. This result is discussed in relation to the mode of replication of the caulimoviral DNA and offers additional evidence of the existence of selection processes regulating the frequency and distribution of the Z-DNA sites in the different genomes.
Handle:	http://hdl.handle.net/11581/242835
Appare nelle tipologie:	Articolo

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