Our verdict is Likely benign. Variant got -4 ACMG points: 0P and 4B. BS2
The NM_001199161.2(USP19):c.3470G>A(p.Arg1157Gln) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000958 in 1,461,704 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).
USP19 (HGNC:12617): (ubiquitin specific peptidase 19) Protein ubiquitination controls many intracellular processes, including cell cycle progression, transcriptional activation, and signal transduction. This dynamic process, involving ubiquitin conjugating enzymes and deubiquitinating enzymes, adds and removes ubiquitin. Deubiquitinating enzymes are cysteine proteases that specifically cleave ubiquitin from ubiquitin-conjugated protein substrates. This protein is a ubiquitin protein ligase and plays a role in muscle wasting. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, May 2017]
Review Status: criteria provided, single submitter
Collection Method: clinical testing
The c.3464G>A (p.R1155Q) alteration is located in exon 23 (coding exon 22) of the USP19 gene. This alteration results from a G to A substitution at nucleotide position 3464, causing the arginine (R) at amino acid position 1155 to be replaced by a glutamine (Q). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -