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Chromosome structure and sequence organization between pathogenic and non-pathogenic Leishmania spp.
S Tamar1, C Dumas, B Papadopoulou
1Centre de Recherche en Infectiologie, Département de Microbiologie, Faculté de Médecine, Université Laval, Québec, Canada.
Molecular and Biochemical Parasitology
|February 13, 2001
Summary
Comparative genomic analysis reveals high conservation of genome organization between pathogenic and non-pathogenic Leishmania species. This finding aids in identifying regions linked to species-specific diseases.
Area of Science:
- Genetics
- Molecular Biology
- Parasitology
Background:
- Leishmania species exhibit significant evolutionary divergence.
- Understanding genome organization is crucial for identifying pathogenicity factors.
Purpose of the Study:
- To compare the genome structure and sequence organization of homologous chromosomes in pathogenic and non-pathogenic Leishmania species.
- To assess the conservation of gene order and orientation across species.
Main Methods:
- Chromosome fragmentation using yeast I-SceI endonuclease.
- Systematic genomic insertions of I-SceI.
- Physical mapping and hybridization studies with chromosomal markers.
Main Results:
- Internal genomic sequences showed highly conserved distances between homologous chromosomes.
- Distances from chromosome ends were more variable.
- Gene order and orientation were largely conserved across pathogenic and non-pathogenic Leishmania species.
Conclusions:
- Genome organization is highly conserved between pathogenic and non-pathogenic Leishmania species.
- Genomic comparisons can highlight regions associated with species-specific pathologies.