Genetic Variant NM_001492.6:c.55C>T (chr19-18870253-G-A) – ACMG Classification: Likely_benign (-3 pts)

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2BP4_StrongBP7

The NM_001492.6(GDF1):c.55C>T(p.Leu19Leu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

GDF1
NM_001492.6 synonymous

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -0.758

Publications

0 publications found

Variant links:

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]

GDF1 links:

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)

CERS1 links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.84).

BP7

Synonymous conserved (PhyloP=-0.758 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GDF1	NM_001492.6 link	c.55C>T	p.Leu19Leu	synonymous_variant	Exon 7 of 8	ENST00000247005.8	NP_001483.3	P27539A0A024R7N8
CERS1	NM_021267.5 link	c.*324C>T		3_prime_UTR_variant	Exon 7 of 8	ENST00000623882.4	NP_067090.1	P27544-1
GDF1	NM_001387438.1 link	c.55C>T	p.Leu19Leu	synonymous_variant	Exon 4 of 5		NP_001374367.1
CERS1	NM_001387440.1 link	c.*324C>T		3_prime_UTR_variant	Exon 7 of 7		NP_001374369.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GDF1	ENST00000247005.8 link	c.55C>T	p.Leu19Leu	synonymous_variant	Exon 7 of 8	1	NM_001492.6	ENSP00000247005.5		P27539
CERS1	ENST00000623882.4 link	c.*324C>T		3_prime_UTR_variant	Exon 7 of 8	1	NM_021267.5	ENSP00000485308.1		P27544-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

Data not reliable, filtered out with message: AC0;AS_VQSR

AF:

0.00

AC:

AN:

1400598

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

691832

African (AFR)

AF:

0.00

AC:

AN:

32122

American (AMR)

AF:

0.00

AC:

AN:

35914

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25170

East Asian (EAS)

AF:

0.00

AC:

AN:

37068

South Asian (SAS)

AF:

0.00

AC:

AN:

79906

European-Finnish (FIN)

AF:

0.00

AC:

AN:

44704

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4228

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1083334

Other (OTH)

AF:

0.00

AC:

AN:

58152

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.84

CADD

Benign

1.1

(source)

DANN

Benign

0.79

PhyloP100

-0.76

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over