7-66092787-G-C

Position:

• chr7-66092787-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_000048.4(ASL):​c.1270G>C​(p.Val424Leu) variant causes a missense change. The variant allele was found at a frequency of 0.00000205 in 1,461,596 control chromosomes in the GnomAD database, with no homozygous occurrence. 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: 32)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: ASL NM_000048.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 6.60

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]

ENSG00000249319 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.877

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ASL	NM_000048.4	c.1270G>C	p.Val424Leu	missense_variant	17/17	ENST00000304874.14	NP_000039.2
ASL	NM_001024943.2	c.1270G>C	p.Val424Leu	missense_variant	16/16		NP_001020114.1
ASL	NM_001024944.2	c.1210G>C	p.Val404Leu	missense_variant	15/15		NP_001020115.1
ASL	NM_001024946.2	c.1192G>C	p.Val398Leu	missense_variant	15/15		NP_001020117.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ASL	ENST00000304874.14	c.1270G>C	p.Val424Leu	missense_variant	17/17	1	NM_000048.4	ENSP00000307188.9
ENSG00000249319	ENST00000450043.2	c.563+124G>C		intron_variant		5		ENSP00000396527.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461596 Hom.: 0 Cov.: 32 AF XY: 0.00000138 AC XY: 1 AN XY: 727114

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000756

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.43
BayesDel_addAF	Pathogenic	0.27	D
BayesDel_noAF	Pathogenic	0.16
CADD	Benign	21
DANN	Uncertain	0.98
DEOGEN2	Pathogenic	0.94	D;.;D;.
Eigen	Uncertain	0.53
Eigen_PC	Uncertain	0.50
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Uncertain	0.94	.;D;D;D
M_CAP	Pathogenic	0.79	D
MetaRNN	Pathogenic	0.88	D;D;D;D
MetaSVM	Pathogenic	0.80	D
MutationAssessor	Uncertain	2.3	M;.;M;.
PrimateAI	Uncertain	0.74	T
PROVEAN	Uncertain	-2.6	D;D;D;D
REVEL	Pathogenic	0.67
Sift	Benign	0.064	T;T;T;T
Sift4G	Uncertain	0.043	D;D;D;D
Polyphen		0.98	D;.;D;.
Vest4		0.59
MutPred		0.58		Loss of catalytic residue at V424 (P = 0.1226);.;Loss of catalytic residue at V424 (P = 0.1226);.;
MVP		0.92
MPC		0.60
ClinPred		0.92	D
GERP RS		5.6
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.72
gMVP		0.79

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

Publications

LitVar

Other links and lift over

dbSNP: rs368264870; hg19: chr7-65557774;