rs375538532

Positions:

• chrX-101398501-T-C
• chrX-101398501-T-G

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_000169.3(GLA):​c.868A>G​(p.Met290Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency: Genomes: not found (cov: 23)
• Consequence: GLA NM_000169.3 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 8.02

Genes affected

GLA (HGNC:4296): (galactosidase alpha) This gene encodes a homodimeric glycoprotein that hydrolyses the terminal alpha-galactosyl moieties from glycolipids and glycoproteins. This enzyme predominantly hydrolyzes ceramide trihexoside, and it can catalyze the hydrolysis of melibiose into galactose and glucose. A variety of mutations in this gene affect the synthesis, processing, and stability of this enzyme, which causes Fabry disease, a rare lysosomal storage disorder that results from a failure to catabolize alpha-D-galactosyl glycolipid moieties. [provided by RefSeq, Jul 2008]

RPL36A-HNRNPH2 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.897

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
GLA	NM_000169.3	c.868A>G	p.Met290Val	missense_variant	6/7	ENST00000218516.4	NP_000160.1
RPL36A-HNRNPH2	NM_001199973.2	c.300+3044T>C		intron_variant			NP_001186902.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
GLA	ENST00000218516.4	c.868A>G	p.Met290Val	missense_variant	6/7	1	NM_000169.3	ENSP00000218516	P1

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 23

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Revvity Omics, Revvity

Sep 08, 2020

- -

Fabry disease Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Feb 07, 2021

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. This variant disrupts the p.Met290 amino acid residue in GLA. Other variant(s) that disrupt this residue have been determined to be pathogenic (PMID: 29307789, 23935525, 27773586, 28728877, 22773828). This suggests that this residue is clinically significant, and that variants that disrupt this residue are likely to be disease-causing. 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"). This variant has been observed in individual(s) with Fabry disease (PMID: 27560961). This variant is not present in population databases (ExAC no frequency). This sequence change replaces methionine with valine at codon 290 of the GLA protein (p.Met290Val). The methionine residue is highly conserved and there is a small physicochemical difference between methionine and valine. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.26
CardioboostCm	Pathogenic	0.97
BayesDel_addAF	Pathogenic	0.67	D
BayesDel_noAF	Pathogenic	0.72
CADD	Uncertain	24
DANN	Uncertain	0.99
DEOGEN2	Pathogenic	0.89	D;.
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Uncertain	0.95	D;D
M_CAP	Pathogenic	0.98	D
MetaRNN	Pathogenic	0.90	D;D
MetaSVM	Pathogenic	1.0	D
MutationAssessor	Uncertain	2.6	M;.
MutationTaster	Benign	1.0	D
PrimateAI	Uncertain	0.69	T
PROVEAN	Benign	-2.3	N;.
REVEL	Pathogenic	0.89
Sift	Uncertain	0.0080	D;.
Sift4G	Uncertain	0.012	D;.
Polyphen		1.0	D;.
Vest4		0.95
MutPred		0.67		Loss of MoRF binding (P = 0.3609);.;
MVP		1.0
MPC		1.8
ClinPred		0.91	D
GERP RS		5.9
Varity_R		0.89
gMVP		0.99

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

No publications associated with this variant yet.

Other links and lift over

hg19: chrX-100653489;