Our verdict is Uncertain significance. The variant received 5 ACMG points: 5P and 0B. PM1PM2PP2
The NM_003400.4(XPO1):āc.3092C>Gā(p.Ser1031Cys) variant causes a missense change. The variant allele was found at a frequency of 0.00000137 in 1,461,374 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S1031F) has been classified as Uncertain significance.
XPO1 (HGNC:12825): (exportin 1) This cell-cycle-regulated gene encodes a protein that mediates leucine-rich nuclear export signal (NES)-dependent protein transport. The protein specifically inhibits the nuclear export of Rev and U snRNAs. It is involved in the control of several cellular processes by controlling the localization of cyclin B, MPAK, and MAPKAP kinase 2. This protein also regulates NFAT and AP-1. [provided by RefSeq, Jan 2015]
Our verdict: Uncertain_significance. The variant received 5 ACMG points.
PM1
In a modified_residue Phosphoserine (size 0) in uniprot entity XPO1_HUMAN
PM2
Very rare variant in population databases, with high coverage;
PP2
Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 3 curated pathogenic missense variants (we use a threshold of 10). The gene has 0 curated benign missense variants. Gene score misZ: 6.0107 (above the threshold of 3.09). Trascript score misZ: 7.9387 (above the threshold of 3.09).