NM_005633.4(SOS1):c.109A>G (p.Thr37Ala) AND RASopathy

Germline classification:: Likely benign (2 submissions)
Last evaluated:: Apr 3, 2017
Review status:: 3 stars out of maximum of 4 stars
reviewed by expert panel

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:: RCV000159147.15

Allele description [Variation Report for NM_005633.4(SOS1):c.109A>G (p.Thr37Ala)]

NM_005633.4(SOS1):c.109A>G (p.Thr37Ala)

Gene:

SOS1:SOS Ras/Rac guanine nucleotide exchange factor 1 [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

2p22.1

Genomic location:

Preferred name:

NM_005633.4(SOS1):c.109A>G (p.Thr37Ala)

Other names:

p.T37A:ACT>GCT; NM_005633.3(SOS1):c.109A>G

HGVS:

NC_000002.12:g.39067732T>C
NG_007530.1:g.57732A>G
NM_001382394.1:c.88A>G
NM_001382395.1:c.109A>G
NM_005633.4:c.109A>GMANE SELECT
NP_001369323.1:p.Thr30Ala
NP_001369324.1:p.Thr37Ala
NP_005624.2:p.Thr37Ala
NP_005624.2:p.Thr37Ala
LRG_754t1:c.109A>G
LRG_754:g.57732A>G
LRG_754p1:p.Thr37Ala
NC_000002.11:g.39294873T>C
NM_005633.3:c.109A>G
Q07889:p.Thr37Ala
c.109A>G

Protein change:

T30A

Links:

UniProtKB: Q07889#VAR_066031; dbSNP: rs150565592

NCBI 1000 Genomes Browser:

rs150565592

Molecular consequence:

NM_001382394.1:c.88A>G - missense variant - [Sequence Ontology: SO:0001583]
NM_001382395.1:c.109A>G - missense variant - [Sequence Ontology: SO:0001583]
NM_005633.4:c.109A>G - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:: RASopathy
Synonyms:: rasopathies; Noonan spectrum disorder
Identifiers:: MONDO: MONDO:0021060; MedGen: C5555857

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV000218752	Labcorp Genetics (formerly Invitae), Labcorp	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Likely benign (Jan 28, 2025)	germline	clinical testing	PubMed (1) [See all records that cite this PMID]
SCV000616432	ClinGen RASopathy Variant Curation Expert Panel	reviewed by expert panel (ClinGen RASopathy ACMG Specifications v1)	Likely benign (Apr 3, 2017)	germline	curation	Citation Link

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV000218752

Labcorp Genetics (formerly Invitae), Labcorp

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Likely benign
(Jan 28, 2025)

germline

clinical testing

PubMed (1)
[See all records that cite this PMID]

SCV000616432

ClinGen RASopathy Variant Curation Expert Panel

reviewed by expert panel

(ClinGen RASopathy ACMG Specifications v1)

Likely benign
(Apr 3, 2017)

germline

curation

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, curation

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

Details of each submission

From Labcorp Genetics (formerly Invitae), Labcorp, SCV000218752.9

#	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 ClinGen RASopathy Variant Curation Expert Panel, SCV000616432.4

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

Description

The c.109A>G (p.Thr37Ala) variant did not segregate with disease in affected family members (BS4; Partners LMM internal data; GTR Lab ID: 21766; ClinVar SCV000062187.5). This variant has been identified in a patient with an alternate molecular basis for disease (BP5; Partners LMM internal data; GTR Lab ID: 21766; ClinVar SCV000062187.5). Computational prediction tools and conservation analysis suggest that the p.Thr37Ala variant does not impact the protein (BP4). In summary, this variant meets criteria to be classified as likely benign. RASopathy-specific ACMG/AMP criteria applied (PMID:29493581): BS4, BP5, BP4.

#	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

Last Updated: Mar 22, 2025

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