Project description:Three different experimental approaches were evaluated for discrimination of genomic variance in and between duplicated sequences using 48 markers in duplicon regions and 17 SNPs in unique sequences previously characterized in another study. We found only the method high-throughput single sperm typing could conclusively resolve the alleles of all markers. Resulting data from single sperm analysis were also used to examine the genetic structure of duplicon markers in the human population. Single sperm typing can be a rapid, efficient and accurate method for initial screening and assessment of genetic variation and for detailed genetic analysis of duplicon markers. Keywords: Genotyping Sixty-five markers including 17 MSVs, 12 PSVs, 19 SIDs and 17 SNPs in unique sequences described in Fredman et al. were selected for study. The samples include 40 genomic DNA samples from four ethnic groups, semen samples from 11 donors, and 10 to 20 sperm from each donor except one, AB012, for whom 65 sperm were analyzed. Both genomic and sperm DNA samples were subject to multiplex amplification followed by microarray analysis. Genotypes were determined by using the Accutyping software. Semen samples were genotyped on both strands. Allele status in these samples were compared and analyzed. The single sperm typing method allowed us to identify markers residing in non-unique sequence, to analyze the detailed genetic structure of the duplicons and to learn whether different alleles are present for the duplicon sequences in the human population.
Project description:Live single-cell RNA-sequencing data from ALS donors only. Single-cell RNA-sequencing data on CD45+ cells dissociated from autopsy tissue and surgical resections from ALS donors across a different series of brain regions.
Project description:Three different experimental approaches were evaluated for discrimination of genomic variance in and between duplicated sequences using 48 markers in duplicon regions and 17 SNPs in unique sequences previously characterized in another study. We found only the method high-throughput single sperm typing could conclusively resolve the alleles of all markers. Resulting data from single sperm analysis were also used to examine the genetic structure of duplicon markers in the human population. Single sperm typing can be a rapid, efficient and accurate method for initial screening and assessment of genetic variation and for detailed genetic analysis of duplicon markers. Keywords: Genotyping
Project description:Sequence single cell sperm using a 10X Chromium. As a pilot test, we used samples from men who have had children with autism and normal controls.
Project description:The three-dimensional (3D) organization of chromosomes is crucial for packaging a large mammalian genome into a confined nucleus and ensuring proper nuclear functions in somatic cells. However, the packaging of the much more condensed sperm genome is fundamentally different and not as well understood. In this study, we resolved the 3D whole-genome structures of a single mammalian sperm cell using an enhanced chromosome conformation capture assay. The reconstructed genome structures accurately delineate the species-specific nuclear morphologies for both human and mouse sperm. We discovered that sperm genomes are divided into chromosomal territories and A/B compartments, similarly as somatic cells. However, neither human nor mouse sperm chromosomes contain topologically associating domains or chromatin loops. These results suggest that the fine-scale chromosomal organization of mammalian sperm fundamentally differs from that of somatic cells.
Project description:The three-dimensional (3D) organization of chromosomes is crucial for packaging a large mammalian genome into a confined nucleus and ensuring proper nuclear functions in somatic cells. However, the packaging of the much more condensed sperm genome is fundamentally different and not as well understood. In this study, we resolved the 3D whole-genome structures of a single mammalian sperm cell using an enhanced chromosome conformation capture assay. The reconstructed genome structures accurately delineate the species-specific nuclear morphologies for both human and mouse sperm. We discovered that sperm genomes are divided into chromosomal territories and A/B compartments, similarly as somatic cells. However, neither human nor mouse sperm chromosomes contain topologically associating domains or chromatin loops. These results suggest that the fine-scale chromosomal organization of mammalian sperm fundamentally differs from that of somatic cells.