نتایج جستجو برای: chromosomal rearrangement
تعداد نتایج: 71324 فیلتر نتایج به سال:
Studies using the Saccharomyces cerevisiae aging model have uncovered life span regulatory pathways that are partially conserved in higher eukaryotes. The simplicity and power of the yeast aging model can also be explored to study DNA damage and genome maintenance as well as their contributions to diseases during aging. Here, we describe a system to study age-dependent DNA mutations, including ...
Genome rearrangements result in mutations that underlie many human diseases, and ongoing genome instability likely contributes to the development of many cancers. The tools for studying genome instability in mammalian cells are limited, whereas model organisms such as Saccharomyces cerevisiae are more amenable to these studies. Here, we discuss the many genetic assays developed to measure the r...
BACKGROUND Apparently balanced chromosomal rearrangements can be associated with an abnormal phenotype, including intellectual disability and autism spectrum disorder (ASD). Genome-wide microarrays reveal cryptic genomic imbalances, related or not to the breakpoints, in 25% to 50% of patients with an abnormal phenotype carrying a microscopically balanced chromosomal rearrangement. Here we perfo...
Approximately 6000 specific DNA deletion events occur during development of the somatic macro-nucleus of the ciliate Tetrahymena. The eliminated Tlr1 element is 13 kb or more in length and has an 825 bp inverted repeat near the rearrangement junctions. A functional analysis of the cis -acting sequences required for Tlr1 rearrangement was performed. A construct consisting of the entire inverted ...
Large-scale analysis of balanced chromosomal translocation breakpoints has shown nonhomologous end joining and microhomology-mediated repair to be the main drivers of interchromosomal structural aberrations. Breakpoint sequences of de novo unbalanced translocations have not yet been investigated systematically. We analyzed 12 de novo unbalanced translocations and mapped the breakpoints in nine....
Reconstructing genome history is complex but necessary to reveal quantitative principles governing genome evolution. Such reconstruction requires recapitulating into a single evolutionary framework the evolution of genome architecture and gene repertoire. Here, we reconstructed the genome history of the genus Lachancea that appeared to cover a continuous evolutionary range from closely related ...
Fetal mosaicism for chromosomal rearrangements remains a challenge to diagnose, even in the era of whole-genome sequencing. We present here case fetal rearrangement explored amniocytes and muscle, consisting major cell population (95%) with partial monosomy 4q minor (5%) additional material replacing 4qter deleted segment. Molecular techniques (MLPA, array-CGH) failed assess origin this materia...
Chromosomal rearrangements can alter the rate and patterns of gene flow within or between species through a reduction in the fitness of chromosomal hybrids or by reducing recombination rates in rearranged areas of the genome. This concept, together with the observation that many species have structural variation in chromosomes, has led to the theory that the rearrangements may play a direct rol...
Synovial chondromatosis is a generally monoarticular disorder characterized by multiple benign nodular cartilaginous formations, arising as result of metaplasia synovial tissue. Other names which this entity known are osteochondromatosis, primary chondromatosis, chondrometaplasia. The most frequent location the knee, hip, shoulder, elbow, wrist and temporomandibular joint. It can be or secondar...
Many chromosomes are rearranged between humans and chimpanzees while others remain colinear. It was recently observed, based on over 100 genes, that the rates of protein evolution are substantially higher on rearranged than on colinear chromosomes during human-chimpanzee evolution. This finding led to the conclusion, since debated in the literature, that chromosomal rearrangements had played a ...
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