chr3-25719512-T-C

Variant names:

• chr3-25719512-T-C
• rs1553649841
• NM_018297.4:c.1913A>G

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_018297.4(NGLY1):​c.1913A>G​(p.Asn638Ser) 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 benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: NGLY1 NM_018297.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:3
• Conservation: PhyloP100: 0.896
• Publications: 0 publications found

Genes affected

NGLY1 (HGNC:17646): (N-glycanase 1) This gene encodes an enzyme that catalyzes hydrolysis of an N(4)-(acetyl-beta-D-glucosaminyl) asparagine residue to N-acetyl-beta-D-glucosaminylamine and a peptide containing an aspartate residue. The encoded enzyme may play a role in the proteasome-mediated degradation of misfolded glycoproteins. Multiple transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, Feb 2009]

NGLY1 Gene-Disease associations (from GenCC):

• congenital disorder of deglycosylation 1

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: ClinGen, G2P, Labcorp Genetics (formerly Invitae)
• NGLY1-deficiency

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.09253812).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_018297.4. 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
	NGLY1	NM_018297.4	MANE Select	c.1913A>G	p.Asn638Ser	missense	Exon 12 of 12	NP_060767.2
	NGLY1	NM_001145293.2		c.1859A>G	p.Asn620Ser	missense	Exon 12 of 12	NP_001138765.1	Q96IV0-2
	NGLY1	NM_001145294.2		c.1787A>G	p.Asn596Ser	missense	Exon 12 of 12	NP_001138766.1	Q96IV0-5

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NGLY1	ENST00000280700.10	TSL:1 MANE Select	c.1913A>G	p.Asn638Ser	missense	Exon 12 of 12	ENSP00000280700.5	Q96IV0-1
	NGLY1	ENST00000428257.5	TSL:1	c.1859A>G	p.Asn620Ser	missense	Exon 12 of 12	ENSP00000387430.1	Q96IV0-2
	NGLY1	ENST00000308710.9	TSL:1	c.1850A>G	p.Asn617Ser	missense	Exon 12 of 12	ENSP00000307980.5	A0A0C4DFP4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	1	-	Congenital disorder of deglycosylation (1)
-	1	-	Inborn genetic diseases (1)
-	1	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.065
PhyloP100		0.90
Varity_R		0.038
gMVP		0.13
Mutation Taster		=88/12	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

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

Other links and lift over

dbSNP: rs1553649841; hg19: chr3-25761003;