rs869312164

Positions:

• chrX-101397975-C-G
• chrX-101397975-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_000169.3(GLA):​c.1124G>C​(p.Gly375Ala) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 24)
• Consequence: GLA NM_000169.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter P:1 U:1 O:1
• Conservation: PhyloP100: 4.62

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:48349): (RPL36A-HNRNPH2 readthrough) This locus represents naturally occurring read-through transcription between the neighboring ribosomal protein L36a and heterogeneous nuclear ribonucleoprotein H2 (H') genes on chromosome X. The read-through transcript produces a protein with similarity to the protein encoded by the upstream locus, ribosomal protein L36a. Alternatively spliced transcript variants have been identified. [provided by RefSeq, Jan 2011]

GLA (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.29114312).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
GLA	NM_000169.3	c.1124G>C	p.Gly375Ala	missense_variant	7/7	ENST00000218516.4	NP_000160.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
GLA	ENST00000218516.4	c.1124G>C	p.Gly375Ala	missense_variant	7/7	1	NM_000169.3	ENSP00000218516.4
RPL36A-HNRNPH2	ENST00000409170.3	c.300+2518C>G		intron_variant		4		ENSP00000386655.4

Frequencies

GnomAD3 genomes Cov.: 24

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 24

ClinVar

Significance: Uncertain significance

Submissions summary: Pathogenic:1 Uncertain:1 Other:1

Revision: criteria provided, single submitter

Submissions by phenotype

Fabry disease Pathogenic:1 Uncertain:1

Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Apr 01, 2020	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.Gly375 amino acid residue in GLA. Other variant(s) that disrupt this residue have been observed in individuals with GLA-related conditions (PMID: 29019163), which suggests that this may be a clinically significant amino acid residue. This variant has been reported to affect GLA protein function (PMID: 26415523). This variant has been observed in individual(s) with Fabry disease (PMID: 26415523, Invitae). ClinVar contains an entry for this variant (Variation ID: 217412). This variant is not present in population databases (ExAC no frequency). This sequence change replaces glycine with alanine at codon 375 of the GLA protein (p.Gly375Ala). The glycine residue is highly conserved and there is a small physicochemical difference between glycine and alanine. -
Likely pathogenic, no assertion criteria provided	research	Albrecht-Kossel-Institute, Medical University Rostock	Jan 01, 2014	- -

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	0.12
CardioboostCm	Benign	0.032
BayesDel_addAF	Uncertain	0.051	T
BayesDel_noAF	Benign	-0.16
CADD	Benign	18
DANN	Benign	0.70
DEOGEN2	Uncertain	0.67	D;.
FATHMM_MKL	Uncertain	0.84	D
LIST_S2	Benign	0.77	T;T
M_CAP	Pathogenic	0.91	D
MetaRNN	Benign	0.29	T;T
MetaSVM	Uncertain	0.70	D
MutationAssessor	Benign	1.9	L;.
PrimateAI	Benign	0.39	T
PROVEAN	Benign	-1.1	N;.
REVEL	Uncertain	0.40
Sift	Benign	0.70	T;.
Sift4G	Benign	0.61	T;.
Polyphen		0.0050	B;.
Vest4		0.67
MutPred		0.57		Loss of loop (P = 0.0986);.;
MVP		0.90
MPC		0.78
ClinPred		0.20	T
GERP RS		5.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.57
gMVP		0.88

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: rs869312164; hg19: chrX-100652963;