Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2
The ENST00000429436.7(MARK3):c.886G>A(p.Gly296Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000155 in 1,613,808 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G296R) has been classified as Likely benign.
MARK3 (HGNC:6897): (microtubule affinity regulating kinase 3) The protein encoded by this gene is activated by phosphorylation and in turn is involved in the phosphorylation of tau proteins MAP2 and MAP4. Several transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Oct 2011]
Uncertain significance, criteria provided, single submitter
clinical testing
Ambry Genetics
Dec 12, 2023
The c.886G>A (p.G296S) alteration is located in exon 9 (coding exon 9) of the MARK3 gene. This alteration results from a G to A substitution at nucleotide position 886, causing the glycine (G) at amino acid position 296 to be replaced by a serine (S). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -
.;.;Gain of catalytic residue at L298 (P = 0.0055);Gain of catalytic residue at L298 (P = 0.0055);Gain of catalytic residue at L298 (P = 0.0055);Gain of catalytic residue at L298 (P = 0.0055);.;