rs1555985200

Variant names:

• chrX-101398946-GC-G
• rs1555985200
• NM_000169.3:c.640-1delG

Variant summary

Our verdict is Likely pathogenic. The variant received 8 ACMG points: 8P and 0B. PVS1_Strong PM2 PP5_Moderate

The NM_000169.3(GLA):​c.640-1delG variant causes a splice acceptor, intron change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 1/1 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Likely pathogenic (★).

• Frequency: Genomes: not found (cov: 23)
• Consequence: GLA NM_000169.3 splice_acceptor, intron
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 7.91
• Publications: 0 publications found

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]

ACMG classification

Our verdict: Likely_pathogenic. The variant received 8 ACMG points.

• PVS1: Splicing +-2 bp (donor or acceptor) variant, product NOT destroyed by NMD, known LOF gene, truncates exone, which is 0.1255814 fraction of the gene. Cryptic splice site detected, with MaxEntScore 3.8, offset of 13, new splice context is: tttcacacccaattatacAGaaa. Cryptic site results in frameshift change. If cryptic site found is not functional and variant results in exon loss, it results in inframe change.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant X-101398946-GC-G is Pathogenic according to our data. Variant chrX-101398946-GC-G is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 524214.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000169.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GLA	NM_000169.3	MANE Select	c.640-1delG		splice_acceptor intron	N/A	NP_000160.1	P06280
	GLA	NM_001406747.1		c.763-1delG		splice_acceptor intron	N/A	NP_001393676.1	A0A3B3IUC4
	GLA	NM_001406748.1		c.640-1delG		splice_acceptor intron	N/A	NP_001393677.1	A0A6Q8PHD1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GLA	ENST00000218516.4	TSL:1 MANE Select	c.640-1delG		splice_acceptor intron	N/A	ENSP00000218516.4	P06280
	RPL36A-HNRNPH2	ENST00000409170.3	TSL:4	c.300+3490delC		intron	N/A	ENSP00000386655.4	H7BZ11
	GLA	ENST00000649178.1		c.763-1delG		splice_acceptor intron	N/A	ENSP00000498186.1	A0A3B3IUC4

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 23

ClinVar

ClinVar submissions

Significance: Likely pathogenic

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
1	-	-	Fabry disease (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		7.9

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.91		Details are displayed if max score is > 0.2
DS_AG_spliceai		0.84		Position offset: -13
DS_AL_spliceai		0.91		Position offset: 0

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

Other links and lift over

dbSNP: rs1555985200; hg19: chrX-100653934;