14-87993164-T-C

Variant names:

• chr14-87993164-T-C
• rs1555384382
• NM_000153.4:c.1A>G

Variant summary

Our verdict is Pathogenic. The variant received 11 ACMG points: 11P and 0B. PVS1 PM2 PP5

The NM_000153.4(GALC):​c.1A>G​(p.Met1?) variant causes a start lost change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (no stars).

• Frequency: Genomes: not found (cov: 33)
• Consequence: GALC NM_000153.4 start_lost
• Clinical Significance: Likely pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 0.959
• Publications: 0 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: G2P, Myriad Women’s Health, Laboratory for Molecular Medicine, Labcorp Genetics (formerly Invitae), PanelApp Australia, ClinGen, Genomics England PanelApp

ACMG classification

Our verdict: Pathogenic. The variant received 11 ACMG points.

• PVS1: Start lost variant, next in-frame start position is after 13 pathogenic variants. Next in-frame start position is after 17 codons. Genomic position: 87993116. Lost 0.024 part of the original CDS.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 14-87993164-T-C is Pathogenic according to our data. Variant chr14-87993164-T-C is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 555953.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

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GALC	NM_000153.4	MANE Select	c.1A>G	p.Met1?	start_lost	Exon 1 of 17	NP_000144.2
	GALC	NM_001201401.2		c.1A>G	p.Met1?	start_lost	Exon 1 of 16	NP_001188330.1
	GALC	NR_187582.1		n.19A>G		non_coding_transcript_exon	Exon 1 of 16

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GALC	ENST00000261304.7	TSL:1 MANE Select	c.1A>G	p.Met1?	start_lost	Exon 1 of 17	ENSP00000261304.2
	GALC	ENST00000393568.8	TSL:2	c.1A>G	p.Met1?	start_lost	Exon 1 of 16	ENSP00000377198.4
	GALC	ENST00000554372.5	TSL:5	n.1A>G		non_coding_transcript_exon	Exon 1 of 7	ENSP00000451884.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 33

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Galactosylceramide beta-galactosidase deficiency Pathogenic:1

Jan 04, 2018

Counsyl

Significance: Likely pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

This submission and the accompanying classification are no longer maintained by the submitter. For more information on current observations and classification, please contact variantquestions@myriad.com.

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.20	D
BayesDel_noAF	Uncertain	0.050
CADD	Benign	21
DANN	Uncertain	0.98
DEOGEN2	Benign	0.29	T
Eigen	Benign	-0.15
Eigen_PC	Benign	-0.084
FATHMM_MKL	Benign	0.53	D
LIST_S2	Uncertain	0.90	D
M_CAP	Uncertain	0.20	D
MetaRNN	Pathogenic	0.97	D
MetaSVM	Benign	-1.1	T
PhyloP100		0.96
PROVEAN	Benign	-0.30	N
REVEL	Benign	0.25
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		0.28	B
Vest4		0.83
MutPred		0.93		Loss of disorder (P = 0.0632)
MVP		0.31
ClinPred		0.93	D
GERP RS		3.3
PromoterAI		-0.16	Neutral
Varity_R		0.87
gMVP		0.80
Mutation Taster		=97/103	disease causing (ClinVar)

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

Other links and lift over

dbSNP: rs1555384382; hg19: chr14-88459508;