chr9-132891603-TA-T

Position:

• chr9-132891603-TA-T

Variant summary

Our verdict is Benign. Variant got -10 ACMG points: 0P and 10B. BP6_Moderate BS1 BS2

The NM_000368.5(TSC1):​c.*4631del variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00281 in 233,420 control chromosomes in the GnomAD database, including 6 homozygotes. Variant has been reported in ClinVar as Likely benign (★).

• Frequency:
  • Genomes: 𝑓 0.0036 (6 hom., cov: 33)
  • Exomes 𝑓: 0.0013 (0 hom.)
• Consequence: TSC1 NM_000368.5 3_prime_UTR
• Clinical Significance: Likely benign criteria provided, single submitter B:2
• Conservation: PhyloP100: 1.08

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 Benign. Variant got -10 ACMG points.

• BP6: Variant 9-132891603-TA-T is Benign according to our data. Variant chr9-132891603-TA-T is described in ClinVar as [Likely_benign]. Clinvar id is 365388.Status of the report is criteria_provided_single_submitter, 1 stars.
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00363 (553/152186) while in subpopulation AFR AF= 0.0114 (475/41524). AF 95% confidence interval is 0.0106. There are 6 homozygotes in gnomad4. There are 260 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.
• BS2: High AC in GnomAd4 at 553 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TSC1	NM_000368.5	c.*4631del		3_prime_UTR_variant	23/23	ENST00000298552.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TSC1	ENST00000298552.9	c.*4631del		3_prime_UTR_variant	23/23	1	NM_000368.5	P4

Frequencies

GnomAD3 genomes AF: 0.00358 AC: 545 AN: 152068 Hom.: 6 Cov.: 33

Gnomad AFR AF: 0.0113

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00242

Gnomad ASJ AF: 0.00605

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000415

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000176

Gnomad OTH AF: 0.00287

GnomAD4 exome AF: 0.00126 AC: 102 AN: 81234 Hom.: 0 Cov.: 0 AF XY: 0.00112 AC XY: 42 AN XY: 37384

Gnomad4 AFR exome AF: 0.0157

Gnomad4 AMR exome AF: 0.000803

Gnomad4 ASJ exome AF: 0.00254

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.000320

Gnomad4 OTH exome AF: 0.00118

GnomAD4 genome AF: 0.00363 AC: 553 AN: 152186 Hom.: 6 Cov.: 33 AF XY: 0.00349 AC XY: 260 AN XY: 74414

Gnomad4 AFR AF: 0.0114

Gnomad4 AMR AF: 0.00242

Gnomad4 ASJ AF: 0.00605

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000415

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000176

Gnomad4 OTH AF: 0.00284

Bravo AF: 0.00396

Asia WGS AF: 0.00260 AC: 10 AN: 3478

ClinVar

Significance: Likely benign

Submissions summary: Benign:2

Revision: criteria provided, single submitter

Submissions by phenotype

Tuberous sclerosis syndrome Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jun 14, 2016

- -

Isolated focal cortical dysplasia type II Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jun 14, 2016

- -

Computational scores

Source: dbNSFP v4.3

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

LitVar

Other links and lift over

dbSNP: rs60000611; hg19: chr9-135766990;