NM_024301.5(FKRP):c.976G>A (p.Ala326Thr) AND Walker-Warburg congenital muscular dystrophy

Germline classification:: Uncertain significance (1 submission)
Last evaluated:: Sep 7, 2022
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:: RCV000799009.8

Allele description [Variation Report for NM_024301.5(FKRP):c.976G>A (p.Ala326Thr)]

NM_024301.5(FKRP):c.976G>A (p.Ala326Thr)

Gene:

FKRP:fukutin related protein [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

19q13.32

Genomic location:

Preferred name:

NM_024301.5(FKRP):c.976G>A (p.Ala326Thr)

HGVS:

NC_000019.10:g.46756426G>A
NG_008898.2:g.15381G>A
NM_001039885.3:c.976G>A
NM_024301.5:c.976G>AMANE SELECT
NP_001034974.1:p.Ala326Thr
NP_077277.1:p.Ala326Thr
LRG_761t1:c.976G>A
LRG_761:g.15381G>A
LRG_761p1:p.Ala326Thr
NC_000019.9:g.47259683G>A
NM_024301.4:c.976G>A

Protein change:

A326T

Links:

dbSNP: rs1201873802

NCBI 1000 Genomes Browser:

rs1201873802

Molecular consequence:

NM_001039885.3:c.976G>A - missense variant - [Sequence Ontology: SO:0001583]
NM_024301.5:c.976G>A - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:: Walker-Warburg congenital muscular dystrophy
Synonyms:: Muscular dystrophy-dystroglycanopathy, type A; Walker-Warburg syndrome
Identifiers:: MONDO: MONDO:0000171; MedGen: C0265221; Orphanet: 899; OMIM: PS236670

Recent activity

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Lipid-A-disaccharide synthase [Snodgrassella alvi wkB2]
Lipid-A-disaccharide synthase [Snodgrassella alvi wkB2]
gi|597812775|gnl|wkYale|SALWKB2_022 AHN27605.1|

Protein
CKO_RS03900 [Citrobacter koseri ATCC BAA-895]
CKO_RS03900 [Citrobacter koseri ATCC BAA-895]
Gene ID:45135080

Gene

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV000938655	Labcorp Genetics (formerly Invitae), Labcorp	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Uncertain significance (Sep 7, 2022)	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

SCV000938655

Labcorp Genetics (formerly Invitae), Labcorp

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Uncertain significance
(Sep 7, 2022)

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, SCV000938655.5

#	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 alanine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 326 of the FKRP protein (p.Ala326Thr). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This variant has not been reported in the literature in individuals affected with FKRP-related conditions. ClinVar contains an entry for this variant (Variation ID: 644998). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt FKRP protein function. 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

Last Updated: Sep 29, 2024

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