rs150422575

Variant names:

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BS1_Supporting

The NM_000147.5(FUCA1):c.1274G>A(p.Gly425Glu) variant causes a missense change. The variant allele was found at a frequency of 0.0000905 in 1,614,096 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00036 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000062 ( 0 hom. )

Consequence

FUCA1
NM_000147.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.45

Variant links:

Genes affected

FUCA1 (HGNC:4006): (alpha-L-fucosidase 1) The protein encoded by this gene is a lysosomal enzyme involved in the degradation of fucose-containing glycoproteins and glycolipids. Mutations in this gene are associated with fucosidosis (FUCA1D), which is an autosomal recessive lysosomal storage disease. A pseudogene of this locus is present on chr 2.[provided by RefSeq, Oct 2009]

FUCA1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.000361 (55/152242) while in subpopulation AFR AF= 0.0012 (50/41528). AF 95% confidence interval is 0.000938. There are 0 homozygotes in gnomad4. There are 24 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FUCA1	NM_000147.5 link	c.1274G>A	p.Gly425Glu	missense_variant	Exon 8 of 8	ENST00000374479.4	NP_000138.2	P04066

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FUCA1	ENST00000374479.4 link	c.1274G>A	p.Gly425Glu	missense_variant	Exon 8 of 8	1	NM_000147.5	ENSP00000363603.3		P04066

Frequencies

GnomAD3 genomes

AF:

0.000362

AC:

AN:

152124

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00121

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000735

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000131

AC:

AN:

251356

Hom.:

AF XY:

0.000118

AC XY:

AN XY:

135846

show subpopulations

Gnomad AFR exome

AF:

0.00142

Gnomad AMR exome

AF:

0.000173

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000352

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000622

AC:

AN:

1461854

Hom.:

Cov.:

AF XY:

0.0000523

AC XY:

AN XY:

727234

show subpopulations

Gnomad4 AFR exome

AF:

0.00116

Gnomad4 AMR exome

AF:

0.000157

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000360

Gnomad4 OTH exome

AF:

0.0000828

GnomAD4 genome

AF:

0.000361

AC:

AN:

152242

Hom.:

Cov.:

AF XY:

0.000322

AC XY:

AN XY:

74440

show subpopulations

Gnomad4 AFR

AF:

0.00120

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000735

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000111

Hom.:

Bravo

AF:

0.000419

ESP6500AA

AF:

0.00159

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.000214

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Fucosidosis

Uncertain:1

Aug 10, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces glycine, which is neutral and non-polar, with glutamic acid, which is acidic and polar, at codon 425 of the FUCA1 protein (p.Gly425Glu). This variant is present in population databases (rs150422575, gnomAD 0.1%). This variant has not been reported in the literature in individuals affected with FUCA1-related conditions. ClinVar contains an entry for this variant (Variation ID: 456362). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). 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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.56

BayesDel_addAF

Uncertain

0.025

BayesDel_noAF

Pathogenic

0.23

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.77

Eigen

Pathogenic

0.79

Eigen_PC

Pathogenic

0.69

FATHMM_MKL

Uncertain

0.96

LIST_S2

Benign

0.74

M_CAP

Benign

0.068

MetaRNN

Uncertain

0.56

MetaSVM

Uncertain

0.13

MutationAssessor

Pathogenic

3.7

PrimateAI

Uncertain

0.55

PROVEAN

Pathogenic

-7.5

REVEL

Uncertain

0.56

Sift

Uncertain

0.019

Sift4G

Uncertain

0.017

Polyphen

0.99

Vest4

0.75

MVP

0.92

MPC

1.2

ClinPred

0.35

GERP RS

5.5

Varity_R

0.81

gMVP

0.91

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over