rs756514375

Variant names:

• chr9-132901668-G-A
• rs756514375
• NM_000368.5:c.2423C>T
• TSC1 p.Ala808Val

Your query was ambiguous. Multiple possible variants found:

• chr9-132901668-G-A
• chr9-132901668-G-C
• chr9-132901668-G-T

Variant summary

Our verdict is Benign. The variant received -9 ACMG points: 0P and 9B. BP4_Strong BP6 BS2

The NM_000368.5(TSC1):​c.2423C>T​(p.Ala808Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000235 in 1,613,892 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. A808A) has been classified as Likely benign.

• Frequency:
  • Genomes: 𝑓 0.000092 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000016 (0 hom.)
• Consequence: TSC1 NM_000368.5 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1 B:8
• Conservation: PhyloP100: 3.47
• Publications: 3 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), Ambry Genetics, G2P, 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 -9 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.059061736).
• BP6: Variant 9-132901668-G-A is Benign according to our data. Variant chr9-132901668-G-A is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 237709.
• BS2: High AC in GnomAd4 at 14 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.2423C>T	p.Ala808Val	missense	Exon 19 of 23	NP_000359.1	Q92574-1
	TSC1	NM_001406592.1		c.2423C>T	p.Ala808Val	missense	Exon 19 of 23	NP_001393521.1	X5D9D2
	TSC1	NM_001406593.1		c.2423C>T	p.Ala808Val	missense	Exon 19 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.2423C>T	p.Ala808Val	missense	Exon 19 of 23	ENSP00000298552.3	Q92574-1
	TSC1	ENST00000490179.4	TSL:3	c.2423C>T	p.Ala808Val	missense	Exon 20 of 24	ENSP00000495533.2	Q92574-1
	TSC1	ENST00000643875.1		c.2423C>T	p.Ala808Val	missense	Exon 19 of 23	ENSP00000495158.1	Q92574-1

Frequencies

GnomAD3 genomes AF: 0.0000920 AC: 14 AN: 152104 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.000242

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000262

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: 0.00

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000478 AC: 12 AN: 251294 AF XY: 0.0000442

Gnomad AFR exome AF: 0.000431

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: 0.0000352

Gnomad OTH exome AF: 0.000163

GnomAD4 exome AF: 0.0000164 AC: 24 AN: 1461788 Hom.: 0 Cov.: 31 AF XY: 0.0000151 AC XY: 11 AN XY: 727206

African (AFR) AF: 0.000209 AC: 7 AN: 33480

American (AMR) AF: 0.0000224 AC: 1 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

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

European-Finnish (FIN) AF: 0.0000188 AC: 1 AN: 53326

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

European-Non Finnish (NFE) AF: 0.0000135 AC: 15 AN: 1112004

Other (OTH) AF: 0.00 AC: 0 AN: 60392

GnomAD4 genome AF: 0.0000920 AC: 14 AN: 152104 Hom.: 0 Cov.: 32 AF XY: 0.0000807 AC XY: 6 AN XY: 74312

African (AFR) AF: 0.000242 AC: 10 AN: 41398

American (AMR) AF: 0.000262 AC: 4 AN: 15276

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

East Asian (EAS) AF: 0.00 AC: 0 AN: 5194

South Asian (SAS) AF: 0.00 AC: 0 AN: 4820

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10616

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

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68010

Other (OTH) AF: 0.00 AC: 0 AN: 2092

Alfa AF: 0.0000548 Hom.: 0

Bravo AF: 0.0000831

EpiCase AF: 0.00

EpiControl AF: 0.0000593

ClinVar

ClinVar submissions

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

Pathogenic	VUS	Benign	Condition
-	-	3	Tuberous sclerosis 1 (3)
-	-	2	Hereditary cancer-predisposing syndrome (2)
-	-	1	Lymphangiomyomatosis;C1846385:Isolated focal cortical dysplasia type II;C1854465:Tuberous sclerosis 1 (1)
-	-	1	not provided (1)
-	-	1	TSC1-related disorder (1)
-	1	-	Tuberous sclerosis syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.15
BayesDel_addAF	Benign	-0.31	T
BayesDel_noAF	Benign	-0.35
CADD	Benign	20
DANN	Uncertain	0.99
DEOGEN2	Benign	0.41	T
Eigen	Benign	-0.45
Eigen_PC	Benign	-0.35
FATHMM_MKL	Uncertain	0.82	D
LIST_S2	Benign	0.79	T
M_CAP	Benign	0.048	D
MetaRNN	Benign	0.059	T
MetaSVM	Benign	-0.44	T
MutationAssessor	Benign	1.2	L
PhyloP100		3.5
PrimateAI	Benign	0.32	T
PROVEAN	Benign	-1.1	N
REVEL	Benign	0.10
Sift	Benign	0.25	T
Sift4G	Benign	0.20	T
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.096
gMVP		0.11
Mutation Taster		=88/12	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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

dbSNP: rs756514375;

hg19: chr9-135777055;