NM_006306.4(SMC1A):c.3235A>G (p.Thr1079Ala) AND Congenital muscular hypertrophy-cerebral syndrome

Germline classification:: Uncertain significance (1 submission)
Last evaluated:: Aug 28, 2018
Review status:: 1 star out of maximum of 4 stars
criteria provided, single submitter

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:: RCV000811425.7

Allele description [Variation Report for NM_006306.4(SMC1A):c.3235A>G (p.Thr1079Ala)]

NM_006306.4(SMC1A):c.3235A>G (p.Thr1079Ala)

Gene:

SMC1A:structural maintenance of chromosomes 1A [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

Xp11.22

Genomic location:

Preferred name:

NM_006306.4(SMC1A):c.3235A>G (p.Thr1079Ala)

HGVS:

NC_000023.11:g.53382556T>C
NG_006988.2:g.45115A>G
NM_001281463.1:c.3169A>G
NM_006306.4:c.3235A>GMANE SELECT
NP_001268392.1:p.Thr1057Ala
NP_006297.2:p.Thr1079Ala
NP_006297.2:p.Thr1079Ala
LRG_773t1:c.3169A>G
LRG_773t2:c.3235A>G
LRG_773:g.45115A>G
LRG_773p1:p.Thr1057Ala
LRG_773p2:p.Thr1079Ala
NC_000023.10:g.53409477T>C
NM_006306.3:c.3235A>G

Protein change:

T1057A

Links:

dbSNP: rs1602398590

NCBI 1000 Genomes Browser:

rs1602398590

Molecular consequence:

NM_001281463.1:c.3169A>G - missense variant - [Sequence Ontology: SO:0001583]
NM_006306.4:c.3235A>G - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:: Congenital muscular hypertrophy-cerebral syndrome (CDLS2)
Synonyms:: Cornelia de Lange syndrome 2
Identifiers:: MONDO: MONDO:0010370; MedGen: C1802395; Orphanet: 199; OMIM: 300590

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV000951691	Labcorp Genetics (formerly Invitae), Labcorp	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Uncertain significance (Aug 28, 2018)	germline	clinical testing	PubMed (1) [See all records that cite this PMID]

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV000951691

Labcorp Genetics (formerly Invitae), Labcorp

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Uncertain significance
(Aug 28, 2018)

germline

clinical testing

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

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

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, SCV000951691.4

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

Description

This sequence change replaces threonine with alanine at codon 1079 of the SMC1A protein (p.Thr1079Ala). The threonine residue is moderately conserved and there is a small physicochemical difference between threonine and alanine. This variant is not present in population databases (ExAC no frequency). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated, but these predictions have not been confirmed by published functional studies and their clinical significance is uncertain. This variant has not been reported in the literature in individuals with SMC1A-related 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

Last Updated: Sep 29, 2024

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