Our verdict is Uncertain significance. Variant got 4 ACMG points: 6P and 2B. PM2PM5PP3_ModerateBP6_Moderate
The NM_000548.5(TSC2):c.782G>T(p.Arg261Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000715 in 1,399,130 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely benign (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R261P) has been classified as Uncertain significance.
TSC2 (HGNC:12363): (TSC complex subunit 2) This gene is a tumor suppressor gene that encodes the growth inhibitory protein tuberin. Tuberin interacts with hamartin to form the TSC protein complex which functions in the control of cell growth. This TSC protein complex negatively regulates mammalian target of rapamycin complex 1 (mTORC1) signaling which is a major regulator of anabolic cell growth. Mutations in this gene have been associated with tuberous sclerosis and lymphangioleiomyomatosis. [provided by RefSeq, May 2022]
Verdict is Uncertain_significance. Variant got 4 ACMG points.
PM2
Very rare variant in population databases, with high coverage;
PM5
Other missense variant is known to change same aminoacid residue: Variant chr16-2057112-G-C is described in Lovd as [Pathogenic].
PP3
MetaRNN computational evidence supports a deleterious effect, 0.885
BP6
Variant 16-2057112-G-T is Benign according to our data. Variant chr16-2057112-G-T is described in ClinVar as [Likely_benign]. Clinvar id is 1465757.Status of the report is criteria_provided_single_submitter, 1 stars.
Gain of ubiquitination at K258 (P = 0.0577);Gain of ubiquitination at K258 (P = 0.0577);Gain of ubiquitination at K258 (P = 0.0577);.;Gain of ubiquitination at K258 (P = 0.0577);Gain of ubiquitination at K258 (P = 0.0577);Gain of ubiquitination at K258 (P = 0.0577);Gain of ubiquitination at K258 (P = 0.0577);.;Gain of ubiquitination at K258 (P = 0.0577);Gain of ubiquitination at K258 (P = 0.0577);Gain of ubiquitination at K258 (P = 0.0577);Gain of ubiquitination at K258 (P = 0.0577);Gain of ubiquitination at K258 (P = 0.0577);.;