9-132902693-C-G

Variant names:

• chr9-132902693-C-G
• NM_000368.5:c.2303G>C

Variant summary

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

The NM_000368.5(TSC1):​c.2303G>C​(p.Arg768Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: TSC1 NM_000368.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.86

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 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TSC1	NM_000368.5	c.2303G>C	p.Arg768Pro	missense_variant	Exon 18 of 23	ENST00000298552.9	NP_000359.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TSC1	ENST00000298552.9	c.2303G>C	p.Arg768Pro	missense_variant	Exon 18 of 23	1	NM_000368.5	ENSP00000298552.3
TSC1	ENST00000490179.4	c.2303G>C	p.Arg768Pro	missense_variant	Exon 19 of 24	3		ENSP00000495533.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.94
BayesDel_addAF	Pathogenic	0.22	D
BayesDel_noAF	Uncertain	0.080
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.68	D;.;D;.;.;D;.;D;.;.;.
Eigen	Uncertain	0.49
Eigen_PC	Uncertain	0.54
FATHMM_MKL	Uncertain	0.91	D
LIST_S2	Uncertain	0.89	.;D;D;D;D;.;.;.;D;D;.
M_CAP	Uncertain	0.13	D
MetaRNN	Uncertain	0.51	D;D;D;D;D;D;D;D;D;D;D
MetaSVM	Uncertain	-0.12	T
MutationAssessor	Benign	1.5	L;.;L;.;.;L;.;L;.;.;.
PrimateAI	Benign	0.30	T
PROVEAN	Uncertain	-2.9	D;D;D;.;.;.;.;.;.;.;.
REVEL	Uncertain	0.49
Sift	Uncertain	0.025	D;D;D;.;.;.;.;.;.;.;.
Sift4G	Uncertain	0.022	D;D;D;.;.;.;.;.;.;.;.
Polyphen		0.99	D;.;D;.;.;D;.;D;.;.;.
Vest4		0.73
MutPred		0.30		Loss of MoRF binding (P = 0.0232);.;Loss of MoRF binding (P = 0.0232);.;.;Loss of MoRF binding (P = 0.0232);.;Loss of MoRF binding (P = 0.0232);.;.;.;
MVP		0.73
MPC		0.94
ClinPred		0.96	D
GERP RS		5.7
Varity_R		0.92
gMVP		0.77

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: chr9-135778080;