NM_133642.5(LARGE1):c.1599C>T (p.Ile533=) AND Muscular dystrophy-dystroglycanopathy type B6

Germline classification:: Conflicting classifications of pathogenicity (2 submissions)
Last evaluated:: Jan 20, 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:: RCV000875961.18

Allele description [Variation Report for NM_133642.5(LARGE1):c.1599C>T (p.Ile533=)]

NM_133642.5(LARGE1):c.1599C>T (p.Ile533=)

Gene:

LARGE1:LARGE xylosyl- and glucuronyltransferase 1 [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

22q12.3

Genomic location:

Preferred name:

NM_133642.5(LARGE1):c.1599C>T (p.Ile533=)

HGVS:

NC_000022.11:g.33304360G>A
NG_009929.2:g.621069C>T
NM_001362949.2:c.1599C>T
NM_001362951.2:c.1599C>T
NM_001362953.2:c.1599C>T
NM_001378624.1:c.1599C>T
NM_001378625.1:c.1599C>T
NM_001378626.1:c.1599C>T
NM_001378627.1:c.1599C>T
NM_001378628.1:c.1599C>T
NM_001378629.1:c.1443C>T
NM_001378630.1:c.996C>T
NM_001378631.1:c.840C>T
NM_004737.7:c.1599C>T
NM_133642.5:c.1599C>TMANE SELECT
NP_001349878.1:p.Ile533=
NP_001349880.1:p.Ile533=
NP_001349882.1:p.Ile533=
NP_001365553.1:p.Ile533=
NP_001365554.1:p.Ile533=
NP_001365555.1:p.Ile533=
NP_001365556.1:p.Ile533=
NP_001365557.1:p.Ile533=
NP_001365558.1:p.Ile481=
NP_001365559.1:p.Ile332=
NP_001365560.1:p.Ile280=
NP_004728.1:p.Ile533=
NP_598397.1:p.Ile533=
LRG_856t1:c.1599C>T
LRG_856t2:c.1599C>T
LRG_856:g.621069C>T
LRG_856p1:p.Ile533=
LRG_856p2:p.Ile533=
NC_000022.10:g.33700346G>A
NM_004737.4:c.1599C>T

Links:

dbSNP: rs12627793

NCBI 1000 Genomes Browser:

rs12627793

Molecular consequence:

NM_001362949.2:c.1599C>T - synonymous variant - [Sequence Ontology: SO:0001819]
NM_001362951.2:c.1599C>T - synonymous variant - [Sequence Ontology: SO:0001819]
NM_001362953.2:c.1599C>T - synonymous variant - [Sequence Ontology: SO:0001819]
NM_001378624.1:c.1599C>T - synonymous variant - [Sequence Ontology: SO:0001819]
NM_001378625.1:c.1599C>T - synonymous variant - [Sequence Ontology: SO:0001819]
NM_001378626.1:c.1599C>T - synonymous variant - [Sequence Ontology: SO:0001819]
NM_001378627.1:c.1599C>T - synonymous variant - [Sequence Ontology: SO:0001819]
NM_001378628.1:c.1599C>T - synonymous variant - [Sequence Ontology: SO:0001819]
NM_001378629.1:c.1443C>T - synonymous variant - [Sequence Ontology: SO:0001819]
NM_001378630.1:c.996C>T - synonymous variant - [Sequence Ontology: SO:0001819]
NM_001378631.1:c.840C>T - synonymous variant - [Sequence Ontology: SO:0001819]
NM_004737.7:c.1599C>T - synonymous variant - [Sequence Ontology: SO:0001819]
NM_133642.5:c.1599C>T - synonymous variant - [Sequence Ontology: SO:0001819]

Condition(s)

Name:: Muscular dystrophy-dystroglycanopathy type B6 (MDDGB6)
Synonyms:: MUSCULAR DYSTROPHY, CONGENITAL, LARGE-RELATED; MUSCULAR DYSTROPHY, CONGENITAL, TYPE 1D; MUSCULAR DYSTROPHY-DYSTROGLYCANOPATHY (CONGENITAL WITH IMPAIRED INTELLECTUAL DEVELOPMENT), TYPE B, 6
Identifiers:: MONDO: MONDO:0012138; MedGen: C1837229; OMIM: 608840

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV001018456	Labcorp Genetics (formerly Invitae), Labcorp	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Benign (Jan 20, 2025)	germline	clinical testing	PubMed (1) [See all records that cite this PMID]
SCV001308191	Illumina Laboratory Services, Illumina	criteria provided, single submitter (ICSL Variant Classification Criteria 13 December 2019)	Uncertain significance (Jan 12, 2018)	germline	clinical testing	Citation Link

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV001018456

Labcorp Genetics (formerly Invitae), Labcorp

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Benign
(Jan 20, 2025)

germline

clinical testing

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

SCV001308191

Illumina Laboratory Services, Illumina

criteria provided, single submitter

(ICSL Variant Classification Criteria 13 December 2019)

Uncertain significance
(Jan 12, 2018)

germline

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

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, SCV001018456.7

#	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 Illumina Laboratory Services, Illumina, SCV001308191.1

#	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, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance 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

Last Updated: Jun 22, 2025

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