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Search: WFRF:(Del Rio Alberto) > (2021)

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1.
  • Axelsson, Erik, et al. (author)
  • The genetic consequences of dog breed formation-Accumulation of deleterious genetic variation and fixation of mutations associated with myxomatous mitral valve disease in cavalier King Charles spaniels
  • 2021
  • In: PLOS Genetics. - : Public Library of Science (PLoS). - 1553-7390 .- 1553-7404. ; 17:9
  • Journal article (peer-reviewed)abstract
    • Selective breeding for desirable traits in strictly controlled populations has generated an extraordinary diversity in canine morphology and behaviour, but has also led to loss of genetic variation and random entrapment of disease alleles. As a consequence, specific diseases are now prevalent in certain breeds, but whether the recent breeding practice led to an overall increase in genetic load remains unclear. Here we generate whole genome sequencing (WGS) data from 20 dogs per breed from eight breeds and document a similar to 10% rise in the number of derived alleles per genome at evolutionarily conserved sites in the heavily bottlenecked cavalier King Charles spaniel breed (cKCs) relative to in most breeds studied here. Our finding represents the first clear indication of a relative increase in levels of deleterious genetic variation in a specific breed, arguing that recent breeding practices probably were associated with an accumulation of genetic load in dogs. We then use the WGS data to identify candidate risk alleles for the most common cause for veterinary care in cKCs-the heart disease myxomatous mitral valve disease (MMVD). We verify a potential link to MMVD for candidate variants near the heart specific NEBL gene in a dachshund population and show that two of the NEBL candidate variants have regulatory potential in heartderived cell lines and are associated with reduced NEBL isoform nebulette expression in papillary muscle (but not in mitral valve, nor in left ventricular wall). Alleles linked to reduced nebulette expression may hence predispose cKCs and other breeds to MMVD via loss of papillary muscle integrity.
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2.
  • Talibov, Vladimir O, 1991-, et al. (author)
  • Discovery of an allosteric ligand binding site in SMYD3 lysine methyltransferase
  • 2021
  • In: ChemBioChem. - : Wiley. - 1439-4227 .- 1439-7633. ; 22:9, s. 1597-1608
  • Journal article (peer-reviewed)abstract
    • SMYD3 is a multifunctional epigenetic enzyme with lysine methyl transferase activity and various interaction partners. It is implicated in the pathophysiology of cancers but with an unclear mechanism. To discover tool compounds for clarifying its biochemistry and potential as a therapeutic target, a set of drug-like compounds was screened using a biosensor-based competition assay. Diperodon was identified as an allosteric ligand. The ( R )-and ( S )-enantiomers of the racemic drug were isolated and their affinities determined ( K D > = 42 and 84 ÎŒM). Co-crystallization revealed that both enantiomers bind to a previously unidentified allosteric site in the C-terminal protein binding domain, consistent with its weak inhibitory effect. No competition between diperodon and HSP90 (a known SMYD3 interaction partner) was observed although HSP90-SMYD3 binding was confirmed ( K D = 13 ÎŒM). The allosteric site appears to be druggable and suitable for exploration of non-catalytic SMYD3 functions and therapeutics with new mechanisms of action.
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