dbSNP rs1554817078: TSC1:p.Arg420Gly (chr9-132910576-T-C) – ACMG Classification: Uncertain_significance (1 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2BP4

The NM_000368.5(TSC1):c.1258A>G(p.Arg420Gly) 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. 15/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. R420R) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 31)

Consequence

TSC1
NM_000368.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.33

Publications

0 publications found

Variant links:

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]

TSC1 Gene-Disease associations (from GenCC):

tuberous sclerosis
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
tuberous sclerosis 1
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics, Genomics England PanelApp
lung lymphangioleiomyomatosis
Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp
tuberous sclerosis complex
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

TSC1 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.37176943).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000368.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
TSC1	NM_000368.5	MANE Select	c.1258A>G	p.Arg420Gly	missense	Exon 12 of 23	NP_000359.1	Q92574-1
TSC1	NM_001406592.1		c.1258A>G	p.Arg420Gly	missense	Exon 12 of 23	NP_001393521.1	X5D9D2
TSC1	NM_001406593.1		c.1258A>G	p.Arg420Gly	missense	Exon 12 of 23	NP_001393522.1	Q92574-1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
TSC1	ENST00000298552.9	TSL:1 MANE Select	c.1258A>G	p.Arg420Gly	missense	Exon 12 of 23	ENSP00000298552.3	Q92574-1
TSC1	ENST00000490179.4	TSL:3	c.1258A>G	p.Arg420Gly	missense	Exon 13 of 24	ENSP00000495533.2	Q92574-1
TSC1	ENST00000493467.6	TSL:1	n.529A>G		non_coding_transcript_exon	Exon 4 of 4

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

Cov.:

GnomAD4 genome

Cov.:

ClinVar

ClinVar submissions

Significance:Uncertain significance

Revision:criteria provided, single submitter

View on ClinVar

Pathogenic

VUS

Benign

Condition

Tuberous sclerosis 1 (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.099

BayesDel_addAF

Benign

-0.0085

BayesDel_noAF

Benign

-0.25

CADD

Benign

(source)

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.53

Eigen

Benign

-0.22

Eigen_PC

Benign

-0.16

FATHMM_MKL

Uncertain

0.94

LIST_S2

Uncertain

0.87

M_CAP

Uncertain

0.16

MetaRNN

Benign

0.37

MetaSVM

Benign

-0.34

MutationAssessor

Benign

1.7

PhyloP100

3.3

PrimateAI

Benign

0.26

PROVEAN

Benign

-1.2

REVEL

Benign

0.27

Sift

Uncertain

0.017

Sift4G

Uncertain

0.052

Polyphen

0.57

Vest4

0.27

MutPred

0.61

Loss of glycosylation at P418 (P = 0.0924)

MVP

0.63

MPC

0.65

ClinPred

0.40

GERP RS

3.4

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.14

gMVP

0.30

Mutation Taster

=51/49

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

Details are displayed if max score is > 0.2

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over