rs118203492

Variant names:

• chr9-132911096-T-C
• rs118203492
• NM_000368.5:c.1047A>G

Variant summary

Our verdict is Benign. The variant received -10 ACMG points: 0P and 10B. BP4_Strong BP6 BP7 BS2

The NM_000368.5(TSC1):​c.1047A>G​(p.Pro349Pro) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000144 in 1,614,004 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: 𝑓 0.000059 (0 hom., cov: 31)
  • Exomes 𝑓: 0.00015 (0 hom.)
• Consequence: TSC1 NM_000368.5 synonymous
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1 B:10 O:1
• Conservation: PhyloP100: 0.140
• Publications: 2 publications found

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

ACMG classification

Our verdict: Benign. The variant received -10 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.06236869).
• BP6: Variant 9-132911096-T-C is Benign according to our data. Variant chr9-132911096-T-C is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 48736.
• BP7: Synonymous conserved (PhyloP=0.14 with no splicing effect.
• BS2: High AC in GnomAd4 at 9 AD gene.

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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TSC1	NM_000368.5	MANE Select	c.1047A>G	p.Pro349Pro	synonymous	Exon 11 of 23	NP_000359.1	Q92574-1
	TSC1	NM_001406592.1		c.1047A>G	p.Pro349Pro	synonymous	Exon 11 of 23	NP_001393521.1	X5D9D2
	TSC1	NM_001406593.1		c.1047A>G	p.Pro349Pro	synonymous	Exon 11 of 23	NP_001393522.1	Q92574-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TSC1	ENST00000298552.9	TSL:1 MANE Select	c.1047A>G	p.Pro349Pro	synonymous	Exon 11 of 23	ENSP00000298552.3	Q92574-1
	TSC1	ENST00000490179.4	TSL:3	c.1047A>G	p.Pro349Pro	synonymous	Exon 12 of 24	ENSP00000495533.2	Q92574-1
	TSC1	ENST00000403810.6	TSL:1	c.*285A>G		3_prime_UTR	Exon 10 of 10	ENSP00000386093.1	Q86WV8

Frequencies

GnomAD3 genomes AF: 0.0000591 AC: 9 AN: 152174 Hom.: 0 Cov.: 31

Gnomad AFR AF: 0.0000241

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000103

Gnomad OTH AF: 0.000478

GnomAD2 exomes AF: 0.0000875 AC: 22 AN: 251302 AF XY: 0.0000663

Gnomad AFR exome AF: 0.0000615

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000176

Gnomad OTH exome AF: 0.000163

GnomAD4 exome AF: 0.000153 AC: 223 AN: 1461830 Hom.: 0 Cov.: 32 AF XY: 0.000140 AC XY: 102 AN XY: 727218

African (AFR) AF: 0.0000299 AC: 1 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26134

East Asian (EAS) AF: 0.00 AC: 0 AN: 39698

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53414

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.000195 AC: 217 AN: 1111958

Other (OTH) AF: 0.0000828 AC: 5 AN: 60396

GnomAD4 genome AF: 0.0000591 AC: 9 AN: 152174 Hom.: 0 Cov.: 31 AF XY: 0.0000404 AC XY: 3 AN XY: 74346

African (AFR) AF: 0.0000241 AC: 1 AN: 41442

American (AMR) AF: 0.00 AC: 0 AN: 15280

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3470

East Asian (EAS) AF: 0.00 AC: 0 AN: 5202

South Asian (SAS) AF: 0.00 AC: 0 AN: 4828

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10614

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.000103 AC: 7 AN: 68020

Other (OTH) AF: 0.000478 AC: 1 AN: 2090

Alfa AF: 0.000102 Hom.: 0

Bravo AF: 0.0000453

ExAC AF: 0.0000412 AC: 5

EpiCase AF: 0.000109

EpiControl AF: 0.000119

ClinVar

ClinVar submissions

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

Pathogenic	VUS	Benign	Condition
-	1	3	Tuberous sclerosis 1 (4)
-	-	2	Hereditary cancer-predisposing syndrome (2)
-	-	2	not provided (2)
-	-	1	Isolated focal cortical dysplasia type II (1)
-	-	1	not specified (1)
-	-	1	Tuberous sclerosis syndrome (2)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.074
BayesDel_noAF	Benign	-0.43
CADD	Benign	3.8
DANN	Benign	0.78
FATHMM_MKL	Uncertain	0.91	D
LIST_S2	Benign	0.18	T
MetaRNN	Benign	0.062	T
PhyloP100		0.14
GERP RS		0.80
Mutation Taster		=99/1	polymorphism

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

Other links and lift over

dbSNP: rs118203492; hg19: chr9-135786483;