NM_002408.4(MGAT2):c.733G>C (p.Val245Leu) AND MGAT2-congenital disorder of glycosylation

Germline classification:: Uncertain significance (3 submissions)
Last evaluated:: Aug 6, 2022
Review status:: 2 stars out of maximum of 4 stars
criteria provided, multiple submitters, no conflicts

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:: RCV000765165.18

Allele description [Variation Report for NM_002408.4(MGAT2):c.733G>C (p.Val245Leu)]

NM_002408.4(MGAT2):c.733G>C (p.Val245Leu)

Gene:

MGAT2:alpha-1,6-mannosyl-glycoprotein 2-beta-N-acetylglucosaminyltransferase [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

14q21.3

Genomic location:

Preferred name:

NM_002408.4(MGAT2):c.733G>C (p.Val245Leu)

HGVS:

NC_000014.9:g.49622001G>C
NG_008920.1:g.6231G>C
NG_033054.1:g.3631C>G
NM_002408.4:c.733G>CMANE SELECT
NP_002399.1:p.Val245Leu
NC_000014.8:g.50088719G>C
NM_002408.3:c.733G>C

Protein change:

V245L

Links:

dbSNP: rs117536357

NCBI 1000 Genomes Browser:

rs117536357

Molecular consequence:

NM_002408.4:c.733G>C - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:: MGAT2-congenital disorder of glycosylation
Synonyms:: CDG IIa; Congenital disorder of glycosylation type 2A; CDG 2A; See all synonyms [MedGen]
Identifiers:: MONDO: MONDO:0008908; MedGen: C2931008; Orphanet: 79329; OMIM: 212066

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Homo sapiens spermatogenesis associated 3 (SPATA3), mRNA
Homo sapiens spermatogenesis associated 3 (SPATA3), mRNA
gi|2074188859|ref|NM_139073.5|

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV000896394	Fulgent Genetics, Fulgent Genetics	criteria provided, single submitter (ACMG Guidelines, 2015)	Uncertain significance (Oct 31, 2018)	unknown	clinical testing	PubMed (1) [See all records that cite this PMID]
SCV000937744	Labcorp Genetics (formerly Invitae), Labcorp	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Uncertain significance (Aug 6, 2022)	germline	clinical testing	PubMed (2) [See all records that cite these PMIDs] 23806237, 28492532
SCV001266660	Illumina Laboratory Services, Illumina	criteria provided, single submitter (ICSL Variant Classification Criteria 13 December 2019)	Uncertain significance (Apr 27, 2017)	germline	clinical testing	PubMed (1) [See all records that cite this PMID] Citation Link

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV000896394

Fulgent Genetics, Fulgent Genetics

criteria provided, single submitter

(ACMG Guidelines, 2015)

Uncertain significance
(Oct 31, 2018)

unknown

clinical testing

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

SCV000937744

Labcorp Genetics (formerly Invitae), Labcorp

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Uncertain significance
(Aug 6, 2022)

germline

clinical testing

PubMed (2)
[See all records that cite these PMIDs]

SCV001266660

Illumina Laboratory Services, Illumina

criteria provided, single submitter

(ICSL Variant Classification Criteria 13 December 2019)

Uncertain significance
(Apr 27, 2017)

germline

clinical testing

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

Citation Link

Help

Summary from all submissions

Ethnicity	Origin	Affected	Individuals	Families	Chromosomes tested	Number Tested	Family history	Method
not provided	unknown	unknown	not provided	not provided	not provided	not provided	not provided	clinical testing
not provided	germline	unknown	not provided	not provided	not provided	not provided	not provided	clinical testing

Citations

PubMed

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

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

See all PubMed Citations (3)

PMC

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.

Genetics in medicine : official journal of the American College of Medical Genetics. 2015 Mar 5; 17(5): 405-424

PMC [article]

PMCID:: PMC4544753
PMID:: 25741868
DOI:: 10.1038/gim.2015.30

Details of each submission

From Fulgent Genetics, Fulgent Genetics, SCV000896394.1

#	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	unknown	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

From Labcorp Genetics (formerly Invitae), Labcorp, SCV000937744.3

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (2)

Description

This sequence change replaces valine, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 245 of the MGAT2 protein (p.Val245Leu). This variant is present in population databases (rs117536357, gnomAD 0.2%), and has an allele count higher than expected for a pathogenic variant. This missense change has been observed in individual(s) with clinical features of a congenital disorder of glycosylation (PMID: 23806237). ClinVar contains an entry for this variant (Variation ID: 94062). 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. 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.

#	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 Illumina Laboratory Services, Illumina, SCV001266660.1

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

Description

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). Publications were found based on this search. However, the evidence from the literature, in combination with allele frequency data from public databases where available, was not sufficient to rule this variant in or out of causing disease. Therefore, this variant is classified as a variant of unknown significance.

#	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: Oct 26, 2024

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