rs1555514182

Variant names:

• chr16-2084442-T-A
• rs1555514182
• NM_000548.5:c.4220T>A

Your query was ambiguous. Multiple possible variants found:

• chr16-2084442-T-A
• chr16-2084442-T-G

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_000548.5(TSC2):​c.4220T>A​(p.Val1407Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,457,340 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts 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. V1407M) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 34)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: TSC2 NM_000548.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.0970
• Publications: 0 publications found

Genes affected

TSC2 (HGNC:12363): (TSC complex subunit 2) This gene is a tumor suppressor gene that encodes the growth inhibitory protein tuberin. Tuberin interacts with hamartin to form the TSC protein complex which functions in the control of cell growth. This TSC protein complex negatively regulates mammalian target of rapamycin complex 1 (mTORC1) signaling which is a major regulator of anabolic cell growth. Mutations in this gene have been associated with tuberous sclerosis and lymphangioleiomyomatosis. [provided by RefSeq, May 2022]

TSC2 Gene-Disease associations (from GenCC):

• tuberous sclerosis

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• tuberous sclerosis 2

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Genomics England PanelApp, G2P, Labcorp Genetics (formerly Invitae), Laboratory for Molecular Medicine, Ambry Genetics
• lymphangioleiomyomatosis

  Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp
• tuberous sclerosis complex

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.17520106).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000548.5. 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
	TSC2	NM_000548.5	MANE Select	c.4220T>A	p.Val1407Glu	missense	Exon 34 of 42	NP_000539.2	P49815-1
	TSC2	NM_001406663.1		c.4217T>A	p.Val1406Glu	missense	Exon 34 of 42	NP_001393592.1	A0A2R8Y6C9
	TSC2	NM_001114382.3		c.4151T>A	p.Val1384Glu	missense	Exon 33 of 41	NP_001107854.1	P49815-4

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TSC2	ENST00000219476.9	TSL:5 MANE Select	c.4220T>A	p.Val1407Glu	missense	Exon 34 of 42	ENSP00000219476.3	P49815-1
	TSC2	ENST00000350773.9	TSL:1	c.4151T>A	p.Val1384Glu	missense	Exon 33 of 41	ENSP00000344383.4	P49815-4
	TSC2	ENST00000401874.7	TSL:1	c.4019T>A	p.Val1340Glu	missense	Exon 32 of 40	ENSP00000384468.2	P49815-5

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1457340 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 724832

African (AFR) AF: 0.00 AC: 0 AN: 33376

American (AMR) AF: 0.00 AC: 0 AN: 44430

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26050

East Asian (EAS) AF: 0.00 AC: 0 AN: 39514

South Asian (SAS) AF: 0.00 AC: 0 AN: 85630

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 51630

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5764

European-Non Finnish (NFE) AF: 0.00000180 AC: 2 AN: 1110720

Other (OTH) AF: 0.00 AC: 0 AN: 60226

GnomAD4 genome Cov.: 34

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.097
BayesDel_addAF	Pathogenic	0.16	D
BayesDel_noAF	Uncertain	0.0
CADD	Benign	10
DANN	Benign	0.89
DEOGEN2	Uncertain	0.44	T
Eigen	Benign	-1.0
Eigen_PC	Benign	-1.1
FATHMM_MKL	Benign	0.097	N
LIST_S2	Uncertain	0.89	D
M_CAP	Pathogenic	0.39	D
MetaRNN	Benign	0.18	T
MetaSVM	Benign	-0.60	T
MutationAssessor	Benign	1.1	L
PhyloP100		-0.097
PrimateAI	Benign	0.41	T
PROVEAN	Benign	-0.98	N
REVEL	Uncertain	0.61
Sift	Uncertain	0.019	D
Sift4G	Uncertain	0.0080	D
Polyphen		0.090	B
Vest4		0.36
MutPred		0.28		Gain of solvent accessibility (P = 9e-04)
MVP		0.96
ClinPred		0.097	T
GERP RS		-1.6
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.20
gMVP		0.36
Mutation Taster		=89/11	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.090		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: rs1555514182; hg19: chr16-2134443;