Project description:Constructing high-quality haplotype-resolved genome assemblies has substantially improved the ability to detect and characterize genetic variants. A targeted approach providing readily access to the rich information from haplotype-resolved genome assemblies will be appealing to groups of basic researchers and medical scientists focused on specific genomic regions. Here, using the 4.5 megabase, notoriously difficult-to-assemble major histocompatibility complex (MHC) region as an example, we demonstrated an approach to construct haplotype-resolved assembly of the targeted genomic region with the CRISPR-based enrichment. Compared to the results from haplotype-resolved genome assembly, our targeted approach achieved comparable completeness and accuracy with reduced computing complexity, sequencing cost, as well as the amount of starting materials. Moreover, using the targeted assembled personal MHC haplotypes as the reference both improves the quantification accuracy for sequencing data and enables allele-specific functional genomics analyses of the MHC region. Given its highly efficient use of resources, our approach can greatly facilitate population genetic studies of targeted regions, and may pave a new way to elucidate the molecular mechanisms in disease etiology.
Project description:Constructing high-quality haplotype-resolved genome assemblies has substantially improved the ability to detect and characterize genetic variants. A targeted approach providing readily access to the rich information from haplotype-resolved genome assemblies will be appealing to groups of basic researchers and medical scientists focused on specific genomic regions. Here, using the 4.5 megabase, notoriously difficult-to-assemble major histocompatibility complex (MHC) region as an example, we demonstrated an approach to construct haplotype-resolved assembly of the targeted genomic region with the CRISPR-based enrichment. Compared to the results from haplotype-resolved genome assembly, our targeted approach achieved comparable completeness and accuracy with reduced computing complexity, sequencing cost, as well as the amount of starting materials. Moreover, using the targeted assembled personal MHC haplotypes as the reference both improves the quantification accuracy for sequencing data and enables allele-specific functional genomics analyses of the MHC region. Given its highly efficient use of resources, our approach can greatly facilitate population genetic studies of targeted regions, and may pave a new way to elucidate the molecular mechanisms in disease etiology.
Project description:Lactobacillus casei is remarkably adaptive to diverse habitats. To understand the evolution and adaptation of Lb. casei strains isolated from different environments, the gene content of 22 Lb. casei strains isolated from various habitats (cheeses, n=8; plant materials, n=8; and human sources, n=6) were examined by comparative genome hybridization with an Lb. casei ATCC 334-based microarray.
Project description:Lactobacillus casei is remarkably adaptive to diverse habitats. To understand the evolution and adaptation of Lb. casei strains isolated from different environments, the gene content of 22 Lb. casei strains isolated from various habitats (cheeses, n=8; plant materials, n=8; and human sources, n=6) were examined by comparative genome hybridization with an Lb. casei ATCC 334-based microarray. Comparative genome hybridization was performed against an Affymetrix custom microarray designed to include 2,661 (97%) chromosomal and 17 (85%) plasmid CDSs predicted to occur in Lb. casei ATCC 334, as well as all predicted CDSs in the draft Lb. helveticus CNRZ 32 genome. CDSs that were not included in the microarray design were all transposase-encoding genes.
Project description:<p>Integrated analyses of transcriptomic, proteomic and metabolomic data sets consistently highlights the crucial involvement of protein function and retinol metabolism pathways in the heat-resistant strain of S. subcrenata. These findings underscore the significance of these pathways in enabling the strain's ability to withstand high temperatures and adapt to heat stress. The haplotype-resolved female and male genomes and multiomics data presented in this study provide a solid foundation for investigating the molecular mechanisms of sex in S. subcrenata.</p>
Project description:<p>Understanding metabolic plasticity of animal evolution is a fundamental challenge in evolutionary biology. Owing to the diversification of insect wing morphology and dynamic energy requirements, the molecular adaptation mechanisms underlying the metabolic pathways in wing evolution remain largely unknown. This study reveals the pivotal role of the duplicated Apolipoprotein D (ApoD) gene in lipid and energy homeostasis in the lepidopteran wing. ApoD underwent significant expansion in insects, with gene duplication and consistent retention observed in Lepidoptera. Notably, duplicated ApoD2 was highly expressed in lepidopteran wings and encoded a unique C-terminal tail, conferring distinct ligand-binding properties. Using Bombyx mori as a model system, we integrated evolutionary analysis, multiomics, and in vivo functional experiments to elucidate the way duplicated ApoD2 mediates lipid trafficking and homeostasis via the AMP-activated protein kinase pathway in wings. Moreover, we revealed the specific expression and functional divergence of duplicated ApoD as a key mechanism regulating juvenile hormone levels and lipid homeostasis in the lepidopteran wing. These findings highlight an evolutionary scenario in which functional divergence and neofunctionalization conferred a novel role of ApoD in shaping adaptive lipid metabolic regulatory networks during wing phenotypic evolution. Overall, we provide in vivo evidence for the functional differentiation of duplicate genes in shaping adaptive metabolic regulatory networks during phenotypic evolution.</p>
Project description:<p>Understanding metabolic plasticity of animal evolution is a fundamental challenge in evolutionary biology. Owing to the diversification of insect wing morphology and dynamic energy requirements, the molecular adaptation mechanisms underlying the metabolic pathways in wing evolution remain largely unknown. This study reveals the pivotal role of the duplicated Apolipoprotein D (ApoD) gene in lipid and energy homeostasis in the lepidopteran wing. ApoD underwent significant expansion in insects, with gene duplication and consistent retention observed in Lepidoptera. Notably, duplicated ApoD2 was highly expressed in lepidopteran wings and encoded a unique C-terminal tail, conferring distinct ligand-binding properties. Using Bombyx mori as a model system, we integrated evolutionary analysis, multiomics, and in vivo functional experiments to elucidate the way duplicated ApoD2 mediates lipid trafficking and homeostasis via the AMP-activated protein kinase pathway in wings. Moreover, we revealed the specific expression and functional divergence of duplicated ApoD as a key mechanism regulating juvenile hormone levels and lipid homeostasis in the lepidopteran wing. These findings highlight an evolutionary scenario in which functional divergence and neofunctionalization conferred a novel role of ApoD in shaping adaptive lipid metabolic regulatory networks during wing phenotypic evolution. Overall, we provide in vivo evidence for the functional differentiation of duplicate genes in shaping adaptive metabolic regulatory networks during phenotypic evolution.</p>