7-97854647-C-A

Variant names:

• chr7-97854647-C-A
• NM_001673.5:c.1171G>T
• ASNS p.Glu391*

Variant summary

Our verdict is Pathogenic. The variant received 10 ACMG points: 10P and 0B. PVS1 PM2

The NM_001673.5(ASNS):​c.1171G>T​(p.Glu391*) variant causes a stop gained 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 32)
• Consequence: ASNS NM_001673.5 stop_gained
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.62
• Publications: 0 publications found

Genes affected

ASNS (HGNC:753): (asparagine synthetase (glutamine-hydrolyzing)) The protein encoded by this gene is involved in the synthesis of asparagine. This gene complements a mutation in the temperature-sensitive hamster mutant ts11, which blocks progression through the G1 phase of the cell cycle at nonpermissive temperature. Alternatively spliced transcript variants have been described for this gene. [provided by RefSeq, May 2010]

ASNS Gene-Disease associations (from GenCC):

• congenital microcephaly - severe encephalopathy - progressive cerebral atrophy syndrome

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: ClinGen, Labcorp Genetics (formerly Invitae), G2P, Orphanet

ENSG00000284707 (HGNC:):

ACMG classification

Our verdict: Pathogenic. The variant received 10 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001673.5. 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
	ASNS	NM_001673.5	MANE Select	c.1171G>T	p.Glu391*	stop_gained	Exon 10 of 13	NP_001664.3
	ASNS	NM_001352496.2		c.1171G>T	p.Glu391*	stop_gained	Exon 11 of 14	NP_001339425.1	P08243-1
	ASNS	NM_133436.3		c.1171G>T	p.Glu391*	stop_gained	Exon 10 of 13	NP_597680.2	P08243-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ASNS	ENST00000394308.8	TSL:1 MANE Select	c.1171G>T	p.Glu391*	stop_gained	Exon 10 of 13	ENSP00000377845.3	P08243-1
	ASNS	ENST00000175506.8	TSL:1	c.1171G>T	p.Glu391*	stop_gained	Exon 11 of 14	ENSP00000175506.4	P08243-1
	ASNS	ENST00000931349.1		c.1219G>T	p.Glu407*	stop_gained	Exon 10 of 13	ENSP00000601408.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.62	D
BayesDel_noAF	Pathogenic	0.62
CADD	Pathogenic	39
DANN	Uncertain	1.0
Eigen	Pathogenic	0.81
Eigen_PC	Uncertain	0.60
FATHMM_MKL	Pathogenic	0.98	D
PhyloP100		2.6
Mutation Taster		=1/199	disease causing (fs/PTC)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.16		Details are displayed if max score is > 0.2

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

hg19: chr7-97483959;