9-132911419-G-T

Position:

• chr9-132911419-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The ENST00000403810.6(TSC1):​c.1063C>A​(p.Leu355Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 12/14 in silico tools predict a benign outcome for this variant. 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. L355V) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 31)
• Consequence: TSC1 ENST00000403810.6 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.105

Genes affected

TSC1 (HGNC:12362): (TSC complex subunit 1) This gene is a tumor suppressor gene that encodes the growth inhibitory protein hamartin. The encoded protein interacts with and stabilizes the GTPase activating protein tuberin. This hamartin-tuberin complex negatively regulates mammalian target of rapamycin complex 1 (mTORC1) signaling which is a major regulator of anabolic cell growth. This protein also functions as a co-chaperone for Hsp90 that inhibits its ATPase activity. This protein functions as a facilitator of Hsp90-mediated folding of kinase and non-kinase clients, including TSC2 and thereby preventing their ubiquitination and proteasomal degradation. Mutations in this gene have been associated with tuberous sclerosis and lymphangioleiomyomatosis. [provided by RefSeq, May 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.22996268).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TSC1	NM_000368.5	c.1029+34C>A		intron_variant		ENST00000298552.9	NP_000359.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TSC1	ENST00000298552.9	c.1029+34C>A		intron_variant		1	NM_000368.5	ENSP00000298552	P4

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 22

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Benign	-0.057	T
BayesDel_noAF	Benign	-0.32
CADD	Benign	13
DANN	Benign	0.88
DEOGEN2	Benign	0.22	.;T
Eigen	Benign	-0.75
Eigen_PC	Benign	-0.74
FATHMM_MKL	Benign	0.16	N
LIST_S2	Benign	0.18	T;T
M_CAP	Uncertain	0.12	D
MetaRNN	Benign	0.23	T;T
MetaSVM	Benign	-0.48	T
MutationTaster	Benign	1.0	N;N;N;N;N
PROVEAN	Benign	0.11	.;N
REVEL	Benign	0.17
Sift	Benign	0.087	.;T
Sift4G	Uncertain	0.050	.;T
Polyphen		0.083	.;B
Vest4		0.12
MutPred		0.69		Gain of sheet (P = 0.0344);Gain of sheet (P = 0.0344);
MVP		0.47
ClinPred		0.050	T
GERP RS		2.4

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr9-135786806;