7-66089148-G-A

Variant names:

• chr7-66089148-G-A
• NM_000048.4:c.891G>A
• ASL p.Arg297Arg

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4 BP7

The NM_000048.4(ASL):​c.891G>A​(p.Arg297Arg) variant causes a synonymous 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. R297R) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: ASL NM_000048.4 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.910
• Publications: 0 publications found

Genes affected

ASL (HGNC:746): (argininosuccinate lyase) This gene encodes a member of the lyase 1 family. The encoded protein forms a cytosolic homotetramer and primarily catalyzes the reversible hydrolytic cleavage of argininosuccinate into arginine and fumarate, an essential step in the liver in detoxifying ammonia via the urea cycle. Mutations in this gene result in the autosomal recessive disorder argininosuccinic aciduria, or argininosuccinic acid lyase deficiency. A nontranscribed pseudogene is also located on the long arm of chromosome 22. Alternatively spliced transcript variants encoding different isoforms have been described. [provided by RefSeq, Jul 2008]

ASL Gene-Disease associations (from GenCC):

• argininosuccinic aciduria

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Myriad Women's Health, G2P, ClinGen, Labcorp Genetics (formerly Invitae), Orphanet, Ambry Genetics

ENSG00000249319 (HGNC:):

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 (REVEL=0.226).
• BP7: Synonymous conserved (PhyloP=0.91 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000048.4. 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
	ASL	NM_000048.4	MANE Select	c.891G>A	p.Arg297Arg	synonymous	Exon 12 of 17	NP_000039.2
	ASL	NM_001024943.2		c.891G>A	p.Arg297Arg	synonymous	Exon 11 of 16	NP_001020114.1	A0A024RDL8
	ASL	NM_001024944.2		c.891G>A	p.Arg297Arg	synonymous	Exon 11 of 15	NP_001020115.1	P04424-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ASL	ENST00000304874.14	TSL:1 MANE Select	c.891G>A	p.Arg297Arg	synonymous	Exon 12 of 17	ENSP00000307188.9	P04424-1
	ASL	ENST00000395332.8	TSL:1	c.891G>A	p.Arg297Arg	synonymous	Exon 11 of 16	ENSP00000378741.3	P04424-1
	ENSG00000249319	ENST00000450043.2	TSL:5	c.204G>A	p.Arg68Arg	synonymous	Exon 3 of 12	ENSP00000396527.2	H7C0S8

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.38
CADD	Benign	11
DANN	Benign	0.69
PhyloP100		0.91
PromoterAI		0.010	Neutral

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

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

Other links and lift over

hg19: chr7-65554135;