19-18884227-G-A

Variant names:

• chr19-18884227-G-A
• rs201106410
• NM_001492.6:c.-873C>T

Variant summary

Our verdict is Benign. The variant received -16 ACMG points: 0P and 16B. BP4_Strong BP6_Very_Strong BS2

The NM_001492.6(GDF1):​c.-873C>T variant causes a 5 prime UTR premature start codon gain change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00182 in 1,613,398 control chromosomes in the GnomAD database, including 4 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.0013 (0 hom., cov: 31)
  • Exomes 𝑓: 0.0019 (4 hom.)
• Consequence: GDF1 NM_001492.6 5_prime_UTR_premature_start_codon_gain
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: -1.97
• Publications: 0 publications found

Genes affected

GDF1 (HGNC:4214): (growth differentiation factor 1) This gene encodes a secreted ligand of the TGF-beta (transforming growth factor-beta) superfamily of proteins. Ligands of this family bind various TGF-beta receptors leading to recruitment and activation of SMAD family transcription factors that regulate gene expression. The encoded preproprotein is proteolytically processed to generate each subunit of the disulfide-linked homodimer. Studies in rodents suggest that this protein is involved in the establishment of left-right asymmetry in early embryogenesis and in neural development in later embryogenesis. The encoded protein is translated from a bicistronic mRNA that also encodes ceramide synthase 1. Mutations in this gene are associated with several congenital cardiovascular malformations. [provided by RefSeq, Jul 2016]

CERS1 (HGNC:14253): (ceramide synthase 1) This gene encodes a ceramide synthase enzyme, which catalyzes the synthesis of ceramide, the hydrophobic moiety of sphingolipids. The encoded enzyme synthesizes 18-carbon (C18) ceramide in brain neurons. Elevated expression of this gene may be associated with increased longevity, while decreased expression of this gene may be associated with myoclonus epilepsy with dementia in human patients. This protein is transcribed from a monocistronic mRNA as well as a bicistronic mRNA, which also encodes growth differentiation factor 1. [provided by RefSeq, Jul 2016]

CERS1 Gene-Disease associations (from GenCC):

• progressive myoclonic epilepsy type 8

  Inheritance: AR Classification: STRONG, SUPPORTIVE, LIMITED Submitted by: Ambry Genetics, Orphanet, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Benign. The variant received -16 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.77).
• BP6: Variant 19-18884227-G-A is Benign according to our data. Variant chr19-18884227-G-A is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 475372.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BS2: High Homozygotes in GnomAdExome4 at 4 AD,AR,Unknown gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001492.6. 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
	GDF1	NM_001492.6	MANE Select	c.-873C>T		5_prime_UTR_premature_start_codon_gain	Exon 3 of 8	NP_001483.3
	CERS1	NM_021267.5	MANE Select	c.450C>T	p.Ala150Ala	synonymous	Exon 3 of 8	NP_067090.1
	GDF1	NM_001492.6	MANE Select	c.-873C>T		5_prime_UTR	Exon 3 of 8	NP_001483.3

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GDF1	ENST00000247005.8	TSL:1 MANE Select	c.-873C>T		5_prime_UTR_premature_start_codon_gain	Exon 3 of 8	ENSP00000247005.5
	CERS1	ENST00000623882.4	TSL:1 MANE Select	c.450C>T	p.Ala150Ala	synonymous	Exon 3 of 8	ENSP00000485308.1
	CERS1	ENST00000429504.6	TSL:1	c.450C>T	p.Ala150Ala	synonymous	Exon 3 of 6	ENSP00000389044.1

Frequencies

GnomAD3 genomes AF: 0.00130 AC: 198 AN: 151998 Hom.: 0 Cov.: 31

Gnomad AFR AF: 0.000363

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00269

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000830

Gnomad FIN AF: 0.000472

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00188

Gnomad OTH AF: 0.00239

GnomAD2 exomes AF: 0.00117 AC: 287 AN: 245376 AF XY: 0.00112

Gnomad AFR exome AF: 0.000389

Gnomad AMR exome AF: 0.00232

Gnomad ASJ exome AF: 0.0000998

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.000426

Gnomad NFE exome AF: 0.00149

Gnomad OTH exome AF: 0.00133

GnomAD4 exome AF: 0.00188 AC: 2740 AN: 1461282 Hom.: 4 Cov.: 31 AF XY: 0.00180 AC XY: 1308 AN XY: 726920

African (AFR) AF: 0.000448 AC: 15 AN: 33478

American (AMR) AF: 0.00248 AC: 111 AN: 44708

Ashkenazi Jewish (ASJ) AF: 0.0000383 AC: 1 AN: 26128

East Asian (EAS) AF: 0.00 AC: 0 AN: 39690

South Asian (SAS) AF: 0.000510 AC: 44 AN: 86212

European-Finnish (FIN) AF: 0.000339 AC: 18 AN: 53174

Middle Eastern (MID) AF: 0.000347 AC: 2 AN: 5768

European-Non Finnish (NFE) AF: 0.00222 AC: 2469 AN: 1111770

Other (OTH) AF: 0.00133 AC: 80 AN: 60354

GnomAD4 genome AF: 0.00131 AC: 199 AN: 152116 Hom.: 0 Cov.: 31 AF XY: 0.00128 AC XY: 95 AN XY: 74378

African (AFR) AF: 0.000386 AC: 16 AN: 41498

American (AMR) AF: 0.00269 AC: 41 AN: 15250

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5168

South Asian (SAS) AF: 0.000831 AC: 4 AN: 4814

European-Finnish (FIN) AF: 0.000472 AC: 5 AN: 10588

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.00188 AC: 128 AN: 68010

Other (OTH) AF: 0.00237 AC: 5 AN: 2110

Alfa AF: 0.00110 Hom.: 0

Bravo AF: 0.00150

Asia WGS AF: 0.000866 AC: 3 AN: 3478

EpiCase AF: 0.00191

EpiControl AF: 0.00148

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Benign:1

Jul 01, 2022

CeGaT Center for Human Genetics Tuebingen

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

CERS1: BP4, BP7

Progressive myoclonic epilepsy type 8 Benign:1

Jan 06, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.77
CADD	Benign	0.95
DANN	Benign	0.91
PhyloP100		-2.0
PromoterAI		0.0019	Neutral
Mutation Taster		=296/4	polymorphism

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: rs201106410; hg19: chr19-18995036; COSMIC: COSV55928325; COSMIC: COSV55928325;