rs1554350554

Variant names:

• chr7-97868955-G-A
• rs1554350554
• NM_001673.5:c.202C>T

Your query was ambiguous. Multiple possible variants found:

• chr7-97868955-G-A
• chr7-97868955-G-T

Variant summary

Our verdict is Likely pathogenic. The variant received 7 ACMG points: 7P and 0B. PM1 PM2 PM5 PP2

The NM_001673.5(ASNS):​c.202C>T​(p.Pro68Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,878 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P68L) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: ASNS NM_001673.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 8.99
• 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: G2P, Orphanet, Labcorp Genetics (formerly Invitae), ClinGen

ENSG00000284707 (HGNC:):

ACMG classification

Our verdict: Likely_pathogenic. The variant received 7 ACMG points.

• PM1: In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 5 uncertain in NM_001673.5
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr7-97868955-G-T is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 522653.Status of the report is criteria_provided_single_submitter, 1 stars.
• PP2: Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 27 curated pathogenic missense variants (we use a threshold of 10). The gene has 3 curated benign missense variants. Gene score misZ: 1.8574 (below the threshold of 3.09). Trascript score misZ: 2.3971 (below the threshold of 3.09). GenCC associations: The gene is linked to congenital microcephaly - severe encephalopathy - progressive cerebral atrophy syndrome.

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

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ASNS	NM_001673.5	MANE Select	c.202C>T	p.Pro68Ser	missense	Exon 3 of 13	NP_001664.3
	ASNS	NM_001352496.2		c.202C>T	p.Pro68Ser	missense	Exon 4 of 14	NP_001339425.1
	ASNS	NM_133436.3		c.202C>T	p.Pro68Ser	missense	Exon 3 of 13	NP_597680.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ASNS	ENST00000394308.8	TSL:1 MANE Select	c.202C>T	p.Pro68Ser	missense	Exon 3 of 13	ENSP00000377845.3
	ASNS	ENST00000175506.8	TSL:1	c.202C>T	p.Pro68Ser	missense	Exon 4 of 14	ENSP00000175506.4
	ASNS	ENST00000931349.1		c.202C>T	p.Pro68Ser	missense	Exon 3 of 13	ENSP00000601408.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461878 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 727238

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39698

South Asian (SAS) AF: 0.00 AC: 0 AN: 86256

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53408

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 8.99e-7 AC: 1 AN: 1112012

Other (OTH) AF: 0.00 AC: 0 AN: 60396

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.58
BayesDel_addAF	Benign	0.0063	T
BayesDel_noAF	Benign	-0.23
CADD	Pathogenic	27
DANN	Pathogenic	1.0
DEOGEN2	Uncertain	0.66	D
Eigen	Uncertain	0.56
Eigen_PC	Uncertain	0.54
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Uncertain	0.94	D
M_CAP	Benign	0.048	D
MetaRNN	Uncertain	0.62	D
MetaSVM	Benign	-0.85	T
MutationAssessor	Benign	1.4	L
PhyloP100		9.0
PrimateAI	Uncertain	0.69	T
PROVEAN	Pathogenic	-5.7	D
REVEL	Uncertain	0.34
Sift	Uncertain	0.0080	D
Sift4G	Benign	0.12	T
Polyphen		0.88	P
Vest4		0.74
MutPred		0.49		Loss of methylation at K65 (P = 0.0794)
MVP		0.71
MPC		1.2
ClinPred		0.99	D
GERP RS		3.8
Varity_R		0.76
gMVP		0.73
Mutation Taster		=20/80	disease causing

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

Other links and lift over

dbSNP: rs1554350554; hg19: chr7-97498267; COSMIC: COSV51556918; COSMIC: COSV51556918;