chr19-18868708-G-C

Position:

• chr19-18868708-G-C

Variant summary

Our verdict is Likely pathogenic. Variant got 8 ACMG points: 8P and 0B. PM1 PM2 PP3_Strong

The NM_001492.6(GDF1):​c.1008C>G​(p.Cys336Trp) variant causes a missense 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 no classification for the single variant (no stars).

• Frequency: Genomes: not found (cov: 33)
• Consequence: GDF1 NM_001492.6 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.67

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]

ACMG classification

Verdict is Likely_pathogenic. Variant got 8 ACMG points.

• PM1: In a disulfide_bond (size 70) in uniprot entity GDF1_HUMAN there are 4 pathogenic changes around while only 0 benign (100%) in NM_001492.6
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.994

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
GDF1	NM_001492.6	c.1008C>G	p.Cys336Trp	missense_variant	8/8	ENST00000247005.8	NP_001483.3
CERS1	NM_021267.5	c.*1277C>G		3_prime_UTR_variant	8/8	ENST00000623882.4	NP_067090.1
GDF1	NM_001387438.1	c.1008C>G	p.Cys336Trp	missense_variant	5/5		NP_001374367.1
CERS1	NM_001387440.1	c.*1869C>G		3_prime_UTR_variant	7/7		NP_001374369.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
GDF1	ENST00000247005.8	c.1008C>G	p.Cys336Trp	missense_variant	8/8	1	NM_001492.6	ENSP00000247005.5
CERS1	ENST00000623882	c.*1277C>G		3_prime_UTR_variant	8/8	1	NM_021267.5	ENSP00000485308.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.91
BayesDel_addAF	Pathogenic	0.36	D
BayesDel_noAF	Pathogenic	0.28
CADD	Uncertain	25
DANN	Uncertain	0.99
DEOGEN2	Pathogenic	0.97	D;.
Eigen	Benign	0.16
Eigen_PC	Benign	0.049
FATHMM_MKL	Benign	0.74	D
LIST_S2	Benign	0.78	T;.
M_CAP	Pathogenic	0.96	D
MetaRNN	Pathogenic	0.99	D;D
MetaSVM	Pathogenic	0.91	D
MutationAssessor	Pathogenic	3.8	H;.
MutationTaster	Benign	1.0	D;D
PROVEAN	Pathogenic	-7.6	D;.
REVEL	Pathogenic	0.85
Sift	Pathogenic	0.0	D;.
Sift4G	Pathogenic	0.0010	D;D
Vest4		0.92
MutPred		0.94		Loss of catalytic residue at P335 (P = 0.0064);Loss of catalytic residue at P335 (P = 0.0064);
MVP		0.60
MPC		2.4
ClinPred		1.0	D
GERP RS		2.7
Varity_R		0.89
gMVP		0.99

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr19-18979517;