Identification of genomic islands in the genomes of five Prochlorococcus strains by multiple genomic comparison
In order to explore the role of horizontal gene transfer in the divergence of genomes within the genus Prochlorococcus, the genomes of five high light-adapted strains of Prochlorococcus were compared. Firstly, both bidirectional best BLASTP search and the conservation of gene order against each othe...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Zhejiang University Press
2010-09-01
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| Series: | 浙江大学学报. 农业与生命科学版 |
| Subjects: | |
| Online Access: | https://www.academax.com/doi/10.3785/j.issn.1008-9209.2010.05.001 |
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| Summary: | In order to explore the role of horizontal gene transfer in the divergence of genomes within the genus Prochlorococcus, the genomes of five high light-adapted strains of Prochlorococcus were compared. Firstly, both bidirectional best BLASTP search and the conservation of gene order against each other were employed to predict orthologs; then the alien genes in one Prochlorococcus strain were identified by examining how many orthologs its each gene had in the genomes of the four other strains. As for a genomic island, it refers to a region composed of one or more contiguous alien genes. The results showed that the number of genomic islands in the five genomes ranged from 16 to 52. Many of the genes in these islands showed similarity to genes found in viral genomes or sequences derived from virus-enriched environmental samples. These results suggest that viruses may have mediated horizontal gene transfer, resulting in genomic divergence amongst Prochlorococcus genomes. |
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| ISSN: | 1008-9209 2097-5155 |