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http://dx.doi.org/10.1002/ajmg.a.31059 | DOI Listing |
Eur J Hum Genet
December 2024
Leukaemia & Blood Cancer Research Unit, Department of Molecular Medicine and Pathology, Faculty of Medical and Health Sciences, The University of Auckland, Auckland, 1023, New Zealand.
Craniofrontonasal syndrome (CFNS) is an X-linked developmental disorder caused by loss of function variants (LOFVs) in the ephrin B1 (EFNB1) gene located on Xq13.1. In CFNS, unlike in other X-linked disorders, females with heterozygous EFNB1 pathogenic variants (PVs) have a severe phenotype, whereas males carrying hemizygous EFNB1 PVs have a mild phenotype.
View Article and Find Full Text PDFProc Natl Acad Sci U S A
November 2024
Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA 02138.
Genomic structural variants (SVs) play a crucial role in adaptive evolution, yet their average fitness effects and characterization with pangenome tools are understudied in wild animal populations. We constructed a pangenome for House Finches (), a model for studies of host-pathogen coevolution, using long-read sequence data on 16 individuals (32 de novoassembled haplotypes) and one outgroup. We identified 887,118 SVs larger than 50 base pairs, mostly (60%) involving repetitive elements, with reduced SV diversity in the eastern US as a result of its introduction by humans.
View Article and Find Full Text PDFbioRxiv
October 2024
Department of Biology, University of Pennsylvania, Philadelphia, PA, 19104.
Pericentromeres are heterochromatic regions adjacent to centromeres that ensure accurate chromosome segregation. Despite their conserved function, they are composed of rapidly evolving A/T-rich satellite DNA. This paradoxical observation is partially resolved by epigenetic mechanisms that maintain heterochromatin, independent of specific DNA sequences.
View Article and Find Full Text PDFGene
January 2025
Institute of Medical Genetics, Azienda Sanitaria Universitaria Friuli Centrale, Udine, Italy.
Chromoanagenesis events consist of complex chromosome rearrangements with multiple breakpoints in one or few chromosomes. Mechanisms of chromoanagenesis are split into three major groups: chromothripsis, chromoanasynthesis and chromoplexy. This study aims to delineate a chromoanagenesis event at the level of chromosome 22 in an individual showing obesity and borderline cognitive performance as major disturbances.
View Article and Find Full Text PDFInt J Mol Sci
June 2024
Laboratory of Medical Genetics, Translational Cytogenomics Research Unit, Bambino Gesù Children's Hospital, IRCCS, 00165 Rome, Italy.
CDKL5 deficiency disorder (CDD) is an X-linked dominant epileptic encephalopathy, characterized by early-onset and drug-resistant seizures, psychomotor delay, and slight facial features. Genomic variants inactivating or impairing its protein product kinase activity have been reported, making next-generation sequencing (NGS) and chromosomal microarray analysis (CMA) the standard diagnostic tests. We report a suspicious case of CDD in a female child who tested negative upon NGS and CMA and harbored an X chromosome de novo pericentric inversion.
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