NM_000153.4:c.195+1G>C

Variant names:

• chr14-87992969-C-G
• rs1009872980
• NM_000153.4:c.195+1G>C

Variant summary

Our verdict is Likely pathogenic. The variant received 7 ACMG points: 7P and 0B. PVS1_Strong PM2 PP5

The NM_000153.4(GALC):​c.195+1G>C variant causes a splice donor, intron change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 3/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Likely pathogenic (no stars).

• Frequency: Genomes: not found (cov: 33)
• Consequence: GALC NM_000153.4 splice_donor, intron
• Scores: Splicing: ADA: 0.9999
• Clinical Significance: Likely pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 6.74
• Publications: 2 publications found

Genes affected

GALC (HGNC:4115): (galactosylceramidase) This gene encodes a lysosomal protein which hydrolyzes the galactose ester bonds of galactosylceramide, galactosylsphingosine, lactosylceramide, and monogalactosyldiglyceride. Mutations in this gene have been associated with Krabbe disease, also known as globoid cell leukodystrophy. Alternate transcriptional splice variants, encoding different isoforms, have been characterized. [provided by RefSeq, Jul 2008]

GALC Gene-Disease associations (from GenCC):

• Krabbe disease

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Laboratory for Molecular Medicine, Genomics England PanelApp, ClinGen, G2P, Labcorp Genetics (formerly Invitae), Myriad Women’s Health

ACMG classification

Our verdict: Likely_pathogenic. The variant received 7 ACMG points.

• PVS1: Splicing +-2 bp (donor or acceptor) variant, product NOT destroyed by NMD, known LOF gene, truncates exone, which is 0.10349854 fraction of the gene.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 14-87992969-C-G is Pathogenic according to our data. Variant chr14-87992969-C-G is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 554787.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000153.4. 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
	GALC	NM_000153.4	MANE Select	c.195+1G>C		splice_donor intron	N/A	NP_000144.2	P54803-1
	GALC	NM_001201401.2		c.195+1G>C		splice_donor intron	N/A	NP_001188330.1	P54803-3
	GALC	NM_001201402.2		c.117+414G>C		intron	N/A	NP_001188331.1	P54803-4

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GALC	ENST00000261304.7	TSL:1 MANE Select	c.195+1G>C		splice_donor intron	N/A	ENSP00000261304.2	P54803-1
	GALC	ENST00000622264.4	TSL:1	c.183+1G>C		splice_donor intron	N/A	ENSP00000480649.1	A0A087WX10
	GALC	ENST00000474294.6	TSL:1	n.185+1G>C		splice_donor intron	N/A

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 33

ClinVar

ClinVar submissions

Significance: Likely pathogenic

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
1	-	-	Galactosylceramide beta-galactosidase deficiency (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Benign	-0.14
CADD	Pathogenic	34
DANN	Benign	0.95
Eigen	Pathogenic	0.73
Eigen_PC	Uncertain	0.46
FATHMM_MKL	Uncertain	0.88	D
PhyloP100		6.7
GERP RS		1.3
PromoterAI		-0.23	Neutral
Mutation Taster		=6/94	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	0.89
SpliceAI score (max)		0.99		Details are displayed if max score is > 0.2
DS_DG_spliceai		0.38		Position offset: 16
DS_DL_spliceai		0.99		Position offset: 1

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

Other links and lift over

dbSNP: rs1009872980; hg19: chr14-88459313;