NM_020997.4:c.835G>T

Variant names:

• chr1-225886993-C-A
• rs146485828
• NM_020997.4:c.835G>T

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_020997.4(LEFTY1):​c.835G>T​(p.Glu279*) variant causes a stop gained change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 33)
• Consequence: LEFTY1 NM_020997.4 stop_gained
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.30
• Publications: 3 publications found

Genes affected

LEFTY1 (HGNC:6552): (left-right determination 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 the mature protein, which plays a role in left-right asymmetry determination of organ systems during development. This gene is closely linked to both a related family member and a related pseudogene. [provided by RefSeq, Aug 2016]

ENSG00000255835 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_020997.4. 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
	LEFTY1	NM_020997.4	MANE Select	c.835G>T	p.Glu279*	stop_gained	Exon 4 of 4	NP_066277.1	O75610

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	LEFTY1	ENST00000272134.5	TSL:1 MANE Select	c.835G>T	p.Glu279*	stop_gained	Exon 4 of 4	ENSP00000272134.5	O75610
	ENSG00000255835	ENST00000432920.2	TSL:2	c.*80G>T		3_prime_UTR	Exon 8 of 8	ENSP00000414068.2	J3KR12
	LEFTY1	ENST00000946628.1		c.859G>T	p.Glu287*	stop_gained	Exon 4 of 4	ENSP00000616687.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 34

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 2

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.60	D
BayesDel_noAF	Pathogenic	0.62
CADD	Pathogenic	36
DANN	Uncertain	1.0
Eigen	Pathogenic	0.75
Eigen_PC	Uncertain	0.53
FATHMM_MKL	Uncertain	0.94	D
PhyloP100		4.3
Vest4		0.71
GERP RS		3.0
Mutation Taster		=19/181	disease causing

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: rs146485828; hg19: chr1-226074693;