X-101407845-G-T

Position:

• chrX-101407845-G-T

Variant summary

Our verdict is Pathogenic. Variant got 14 ACMG points: 14P and 0B. PM1 PM2 PM5 PP5_Very_Strong

The NM_000169.3(GLA):​c.59C>A​(p.Ala20Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Likely pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A20P) has been classified as Pathogenic.

• Frequency: Genomes: not found (cov: 23)
• Consequence: GLA NM_000169.3 missense
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:3 O:1
• Conservation: PhyloP100: 0.160

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 Pathogenic. Variant got 14 ACMG points.

• PM1: In a hotspot region, there are 6 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 11 uncertain in NM_000169.3
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chrX-101407846-C-G is described in ClinVar as [Pathogenic]. Clinvar id is 10764.Status of the report is no_assertion_criteria_provided, 0 stars.
• PP5: Variant X-101407845-G-T is Pathogenic according to our data. Variant chrX-101407845-G-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 217373.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
GLA	NM_000169.3	c.59C>A	p.Ala20Asp	missense_variant	1/7	ENST00000218516.4
RPL36A-HNRNPH2	NM_001199973.2	c.301-4091G>T		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
GLA	ENST00000218516.4	c.59C>A	p.Ala20Asp	missense_variant	1/7	1	NM_000169.3	P1

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 23

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:3 Other:1

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Fabry disease Pathogenic:3

Likely pathogenic, criteria provided, single submitter	clinical testing	Fulgent Genetics, Fulgent Genetics	Nov 02, 2021	- -
Pathogenic, no assertion criteria provided	research	Albrecht-Kossel-Institute, Medical University Rostock	Jan 01, 2014	- -
Pathogenic, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Nov 28, 2022	For these reasons, this variant has been classified as Pathogenic. This variant disrupts the p.Ala20 amino acid residue in GLA. Other variant(s) that disrupt this residue have been determined to be pathogenic (PMID: 7596372, 17555407, 23935525, 26415523, 27657681). This suggests that this residue is clinically significant, and that variants that disrupt this residue are likely to be disease-causing. Experimental studies have shown that this missense change affects GLA function (PMID: 26415523, 27657681). 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. ClinVar contains an entry for this variant (Variation ID: 217373). This missense change has been observed in individual(s) with Fabry disease (PMID: 33204599; Invitae). This variant is not present in population databases (gnomAD no frequency). This sequence change replaces alanine, which is neutral and non-polar, with aspartic acid, which is acidic and polar, at codon 20 of the GLA protein (p.Ala20Asp). -

Migalastat response Other:1

drug response, no assertion criteria provided

research

Albrecht-Kossel-Institute, Medical University Rostock

Jan 01, 2014

- Pharmacological Chaperone response: no

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.23
CardioboostCm	Benign	0.060
BayesDel_addAF	Pathogenic	0.16	D
BayesDel_noAF	Uncertain	0.0
CADD	Benign	14
DANN	Benign	0.94
DEOGEN2	Benign	0.41	T;.
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Benign	0.51	T;T
M_CAP	Pathogenic	0.98	D
MetaRNN	Uncertain	0.65	D;D
MetaSVM	Pathogenic	1.9	D
MutationAssessor	Benign	1.8	L;.
MutationTaster	Benign	1.0	N
PrimateAI	Benign	0.33	T
PROVEAN	Uncertain	-2.4	N;.
REVEL	Uncertain	0.59
Sift	Benign	0.085	T;.
Sift4G	Benign	0.14	T;.
Polyphen		0.78	P;.
Vest4		0.93
MutPred		0.77		Loss of helix (P = 0.0558);Loss of helix (P = 0.0558);
MVP		0.92
MPC		1.4
ClinPred		0.21	T
GERP RS		1.6
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.36
gMVP		0.93

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

Other links and lift over

dbSNP: rs869312134; hg19: chrX-100662833;