rs111422676

chrX-101398011-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 5P and 4B. PM1 PM5 PP5 BS2

The NM_000169.3(GLA):c.1088G>A(p.Arg363His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000257 in 1,207,965 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 18 hemizygotes in GnomAD. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R363C) has been classified as Likely pathogenic.

• Frequency:
  • Genomes: 𝑓 0.00013 (0 hom., 9 hem., cov: 23)
  • Exomes 𝑓: 0.000016 (0 hom. 9 hem.)
• Consequence: GLA NM_000169.3 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:13 U:2
• Conservation: PhyloP100: -0.0720

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 1 ACMG points.

• PM1: In a hotspot region, there are 7 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 6 uncertain in NM_000169.3
• PM5: Other missense variant is known to change same aminoacid residue: Variant chrX-101398012-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 198401.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• PP5: Variant X-101398011-C-T is Pathogenic according to our data. Variant chrX-101398011-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 222141.We mark this variant Likely_pathogenic, oryginal submissions are: {Uncertain_significance=1, Pathogenic=11, Likely_pathogenic=1}. Variant chrX-101398011-C-T is described in Lovd as [Pathogenic].
• BS2: High Hemizygotes in GnomAd at 9 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
GLA	NM_000169.3	c.1088G>A	p.Arg363His	missense_variant	7/7	ENST00000218516.4
RPL36A-HNRNPH2	NM_001199973.2	c.300+2554C>T		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
GLA	ENST00000218516.4	c.1088G>A	p.Arg363His	missense_variant	7/7	1	NM_000169.3	P1

Frequencies

GnomAD3 genomes AF: 0.000125 AC: 14 AN: 111964 Hom.: 0 Cov.: 23 AF XY: 0.000264 AC XY: 9 AN XY: 34152

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00133

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: 0.00

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.0000545 AC: 10 AN: 183364 Hom.: 0 AF XY: 0.0000885 AC XY: 6 AN XY: 67812

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.000146

Gnomad ASJ exome AF: 0.000134

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.000262

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000155 AC: 17 AN: 1096001 Hom.: 0 Cov.: 30 AF XY: 0.0000249 AC XY: 9 AN XY: 361377

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000852

Gnomad4 ASJ exome AF: 0.0000516

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.000222

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000119

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome AF: 0.000125 AC: 14 AN: 111964 Hom.: 0 Cov.: 23 AF XY: 0.000264 AC XY: 9 AN XY: 34152

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.00133

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00

Alfa AF: 0.000128 Hom.: 1

Bravo AF: 0.000121

ExAC AF: 0.0000494 AC: 6

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:13 Uncertain:2

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Fabry disease Pathogenic:11 Uncertain:1

Pathogenic, criteria provided, single submitter	clinical testing	Mendelics	May 04, 2022	- -
Likely pathogenic, criteria provided, single submitter	curation	Broad Center for Mendelian Genomics, Broad Institute of MIT and Harvard	Jan 22, 2020	The p.Arg363His variant in GLA has been reported in at least eight individuals with Fabry disease (PMID: 30477121, 21420783, 11668641, 12175777, 23935525, 28360401, 28302345), segregated with disease in three affected relatives from one family (PMID: 26937405), and has been identified in 0.03% (5/19142) of South Asian chromosomes, including 3 hemizygotes, by the Genome Aggregation Database (gnomAD, http://gnomad.broadinstitute.org; dbSNP rs111422676). Please note that for diseases with clinical variability, or reduced penetrance, pathogenic variants may be present at a low frequency in the general population. Additionally, this variant has a high prevalence in late-onset cases, which may account for the frequency in gnomAD. This variant has also been reported in ClinVar as Pathogenic by EGL Genetic Diagnostics and Integrated Genetics (Variation ID: 222141). In vitro functional studies provide some evidence that the p.Arg363His variant may slightly impact protein function (PMID: 21598360, 23935525, 19387866). However, these types of assays may not accurately represent biological function. Computational prediction tools and conservation analyses do not provide strong support for or against an impact to the protein. The phenotype of individuals hemizygous for this variant is highly specific for Fabry disease based on enzymatic diagnosis consistent with disease (PMID: 30477121, 21420783, 11668641, 12175777, 23935525, 28360401, 28302345). In summary, although additional studies are required to fully establish its clinical significance, this variant is likely pathogenic despite the higher than expected allele frequency in the general population. ACMG/AMP Criteria applied: BS1_supporting, PP1_moderate, PP4, PS3_supporting, PS4_moderate (Richards 2015). -
Pathogenic, no assertion criteria provided	clinical testing	Natera, Inc.	Sep 03, 2020	- -
Pathogenic, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Jul 05, 2017	Variant summary: The GLA c.1088G>A (p.Arg363His) variant involves the alteration of a non-conserved nucleotide. 2/5 in silico tools predict a damaging outcome for this variant. This variant was found in 3/88023 control chromosomes (3 hemizygotes) at a frequency of 0.0000341, which does not exceed the estimated maximal expected allele frequency of a pathogenic GLA variant (0.005). This variant has been reported in multiple patients with classic or late-onset Fabry disease. In vitro enyzme activity assay showed this variant led to moderate decrease of enzyme activity. Multiple clinical diagnostic laboratories/reputable databases classified this variant as pathogenic. In addition, p.R363C and p.R363P have been reported to associate with Fabry disease, suggesting R363 is critical for GLA function. Taken together, this variant is classified as pathogenic. -
Pathogenic, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Feb 01, 2022	This missense variant replaces arginine with histidine at codon 363 of the GLA protein. Functional studies have shown the mutant protein to exhibit significantly reduced GLA enzyme activity in vitro (>70% decrease compared to wild type) (PMID: 21598360, 23935525). This variant has been reported in four individuals affected with classic Fabry disease and in ten individuals affected with late-onset Fabry disease (PMID: 11668641, 12175777, 21420783, 26937405, 28360401, 30477121, 33022387, 33163363, 33204599, 33437642, 34545322 ). In all tested carrier individuals, decreased leukocyte GLA enzyme activities and increased plasma biomarker globotriaosylsphingosine (lyso-Gb3) levels were observed (PMID: 19387866, 21420783, 28302345, 33022387, 34199132). This variant has been identified in 10/183364 chromosomes in the general population by the Genome Aggregation Database (gnomAD). A different missense variant occurring at the same codon, p.Arg363Cys, has been shown to cause loss of GLA protein function and observed in individuals affected with Fabry disease (ClinVar variation ID: 198401). This indicates that arginine at this position is a functionally and clinically important residue. Based on the available evidence, this variant is classified as Pathogenic. -
Pathogenic, criteria provided, single submitter	clinical testing	Baylor Genetics	Nov 20, 2020	This variant was determined to be pathogenic according to ACMG Guidelines, 2015 [PMID:25741868]. -
Pathogenic, criteria provided, single submitter	clinical testing	Neuberg Centre For Genomic Medicine, NCGM	-	The missense variant p.R363H in GLA (NM_000169.2) has been reported previously in affected individuals with late onset Fabry disease (Blaydon et al 2001; Serebrinsky et al, 2015). In vitro enzyme studies depict a moderate effect on enzyme activity which leads to an attenuated/atypical/late-onset phenotype (Lukas et al, 2013; Riera et al, 2015). I t has been classified as a Pathogenic for the late onset phenotype by the Fabry disease working group (Germain et al,2 020). It has been submitted to ClinVar with conflicting interpretations including VUS/Likely Pathogenic and Pathogenic. It is present in 6 hemizygous males in the gnomAD database. However presence of clinical variability ranging from single organ involvement to ascertainment via family screening could account for the presence of these hemizygous males within the gnomAD database. There is a small physicochemical difference between arginine and histidine, which is not likely to impact secondary protein structure as these residues share similar properties. In silico tools predict the variant to be tolerated and the residue is weakly conserved across species. For these reasons, this variant has been classified as Pathogenic -
Pathogenic, criteria provided, single submitter	research	HudsonAlpha Institute for Biotechnology, HudsonAlpha Institute for Biotechnology	Oct 10, 2018	- -
Pathogenic, criteria provided, single submitter	clinical testing	Invitae	Jan 24, 2024	This sequence change replaces arginine, which is basic and polar, with histidine, which is basic and polar, at codon 363 of the GLA protein (p.Arg363His). This variant is present in population databases (rs111422676, gnomAD 0.03%). This missense change has been observed in individual(s) with Fabry disease (PMID: 11668641, 12175777, 26937405, 28302345). ClinVar contains an entry for this variant (Variation ID: 222141). 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 not expected to disrupt GLA protein function with a negative predictive value of 80%. Experimental studies have shown that this missense change affects GLA function (PMID: 19387866, 21598360). This variant disrupts the p.Arg363 amino acid residue in GLA. Other variant(s) that disrupt this residue have been determined to be pathogenic (PMID: 12175777, 21598360, 25835592, 26937405; Invitae). This suggests that this residue is clinically significant, and that variants that disrupt this residue are likely to be disease-causing. For these reasons, this variant has been classified as Pathogenic. -
Pathogenic, criteria provided, single submitter	clinical testing	Fulgent Genetics, Fulgent Genetics	Oct 31, 2018	- -
Pathogenic, criteria provided, single submitter	clinical testing	Genome-Nilou Lab	Jul 15, 2021	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Kasturba Medical College, Manipal, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, India	-	- -

not provided Pathogenic:2 Uncertain:1

Uncertain significance, no assertion criteria provided	research	Gharavi Laboratory, Columbia University	Sep 16, 2018	- -
Pathogenic, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	May 01, 2018	- -
Pathogenic, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Apr 27, 2023	- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.088
CardioboostCm	Benign	0.023
BayesDel_addAF	Benign	-0.097	T
BayesDel_noAF	Uncertain	-0.070
Cadd	Benign	12
Dann	Benign	0.75
DEOGEN2	Uncertain	0.67	D;.
FATHMM_MKL	Benign	0.11	N
LIST_S2	Benign	0.83	T;T
M_CAP	Pathogenic	0.96	D
MetaRNN	Uncertain	0.66	D;D
MetaSVM	Pathogenic	2.0	D
MutationAssessor	Benign	1.9	L;.
MutationTaster	Benign	1.0	N
PrimateAI	Benign	0.26	T
PROVEAN	Benign	-1.1	N;.
REVEL	Uncertain	0.44
Sift	Benign	0.47	T;.
Sift4G	Benign	0.51	T;.
Polyphen		0.41	B;.
Vest4		0.64
MutPred		0.86		Loss of sheet (P = 0.0817);.;
MVP		0.98
MPC		0.90
ClinPred		0.019	T
GERP RS		-1.2
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.25
gMVP		0.79

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: rs111422676; hg19: chrX-100652999;