NM_000368.5(TSC1):c.532G>A (p.Val178Ile) AND Tuberous sclerosis 1

Germline classification:: Conflicting classifications of pathogenicity (5 submissions)
Last evaluated:: Apr 8, 2025
Review status:: criteria provided, conflicting classifications

Somatic classification of clinical impact:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Somatic classification of oncogenicity:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Record status:: current
Accession:: RCV000228124.26

Allele description [Variation Report for NM_000368.5(TSC1):c.532G>A (p.Val178Ile)]

NM_000368.5(TSC1):c.532G>A (p.Val178Ile)

Gene:

TSC1:TSC complex subunit 1 [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

9q34.13

Genomic location:

Preferred name:

NM_000368.5(TSC1):c.532G>A (p.Val178Ile)

HGVS:

NC_000009.12:g.132921950C>T
NG_012386.1:g.27684G>A
NM_000368.5:c.532G>AMANE SELECT
NM_001162426.2:c.532G>A
NM_001162427.2:c.379G>A
NM_001362177.2:c.169G>A
NP_000359.1:p.Val178Ile
NP_000359.1:p.Val178Ile
NP_001155898.1:p.Val178Ile
NP_001155899.1:p.Val127Ile
NP_001349106.1:p.Val57Ile
LRG_486t1:c.532G>A
LRG_486:g.27684G>A
LRG_486p1:p.Val178Ile
NC_000009.11:g.135797337C>T
NM_000368.3:c.532G>A
NM_000368.4:c.532G>A
p.V178I
p.(Val178Ile)

Protein change:

V127I

Links:

Tuberous sclerosis database (TSC1): TSC1_00025; dbSNP: rs118203395

NCBI 1000 Genomes Browser:

rs118203395

Molecular consequence:

NM_000368.5:c.532G>A - missense variant - [Sequence Ontology: SO:0001583]
NM_001162426.2:c.532G>A - missense variant - [Sequence Ontology: SO:0001583]
NM_001162427.2:c.379G>A - missense variant - [Sequence Ontology: SO:0001583]
NM_001362177.2:c.169G>A - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:: Tuberous sclerosis 1 (TSC1)
Identifiers:: MONDO: MONDO:0008612; MedGen: C1854465; Orphanet: 805; OMIM: 191100

Recent activity

Clear Turn Off Turn On

Your browsing activity is empty.

Activity recording is turned off.

Turn recording back on

Help

Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV000284730	Labcorp Genetics (formerly Invitae), Labcorp	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Benign (Feb 3, 2025)	germline	clinical testing	PubMed (1) [See all records that cite this PMID]
SCV000928337	Laboratory of Medical Genetics, National & Kapodistrian University of Athens	criteria provided, single submitter (ACMG Guidelines, 2015)	Uncertain significance (Feb 27, 2018)	de novo	clinical testing	PubMed (1) [See all records that cite this PMID]
SCV001327971	Illumina Laboratory Services, Illumina	criteria provided, single submitter (ICSL Variant Classification Criteria 13 December 2019)	Likely benign (Jan 12, 2018)	germline	clinical testing	Citation Link,
SCV002040156	Genome-Nilou Lab	criteria provided, single submitter (ACMG Guidelines, 2015)	Benign (Nov 7, 2021)	germline	clinical testing	PubMed (1) [See all records that cite this PMID]
SCV006299569	Myriad Genetics, Inc.	criteria provided, single submitter (Myriad Autosomal Dominant, Autosomal Recessive and X-Linked Classification Criteria (2023))	Likely benign (Apr 8, 2025)	unknown	clinical testing	Citation Link

Help

Summary from all submissions

Ethnicity	Origin	Affected	Individuals	Families	Chromosomes tested	Number Tested	Family history	Method
not provided	germline	unknown	not provided	not provided	not provided	not provided	not provided	clinical testing
not provided	germline	no	not provided	not provided	not provided	not provided	not provided	clinical testing
not provided	unknown	unknown	not provided	not provided	not provided	not provided	not provided	clinical testing
not provided	de novo	yes	not provided	not provided	not provided	not provided	not provided	clinical testing

Citations

PubMed

Sherloc: a comprehensive refinement of the ACMG-AMP variant classification criteria.

Nykamp K, Anderson M, Powers M, Garcia J, Herrera B, Ho YY, Kobayashi Y, Patil N, Thusberg J, Westbrook M; Invitae Clinical Genomics Group, Topper S.

Genet Med. 2017 Oct;19(10):1105-1117. doi: 10.1038/gim.2017.37. Epub 2017 May 11. Erratum in: Genet Med. 2020 Jan;22(1):240. doi: 10.1038/s41436-019-0624-9..

PubMed [citation]

PMID:: 28492532
PMCID:: PMC5632818

Standards and guidelines for the interpretation of sequence variants: a joint consensus recommendation of the American College of Medical Genetics and Genomics and the Association for Molecular Pathology.

Richards S, Aziz N, Bale S, Bick D, Das S, Gastier-Foster J, Grody WW, Hegde M, Lyon E, Spector E, Voelkerding K, Rehm HL; ACMG Laboratory Quality Assurance Committee.

Genet Med. 2015 May;17(5):405-24. doi: 10.1038/gim.2015.30. Epub 2015 Mar 5.

PubMed [citation]

PMID:: 25741868
PMCID:: PMC4544753

Details of each submission

From Labcorp Genetics (formerly Invitae), Labcorp, SCV000284730.11

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (1)

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

From Laboratory of Medical Genetics, National & Kapodistrian University of Athens, SCV000928337.1

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (1)

Description

PP3

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	de novo	yes	not provided	not provided	not provided		not provided	not provided	not provided	not provided

From Illumina Laboratory Services, Illumina, SCV001327971.1

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	not provided

Description

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease.

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

From Genome-Nilou Lab, SCV002040156.1

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (1)

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	no	not provided	not provided	not provided		not provided	not provided	not provided	not provided

From Myriad Genetics, Inc., SCV006299569.1

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	not provided

Description

This variant is considered likely benign. This variant has been observed at a population frequency that is significantly greater than expected given the associated disease prevalence and penetrance.

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	unknown	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

Last Updated: Oct 25, 2025

ClinVar

Relating variation to medicine