NM_054012.4:c.-5-1915C>T

Variant names:

• chr9-130450309-C-T
• rs549216391
• NM_054012.4:c.-5-1915C>T

Variant summary

Our verdict is Likely benign. The variant received -6 ACMG points: 0P and 6B. BP4_Strong BP6_Moderate

The NM_054012.4(ASS1):​c.-5-1915C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000195 in 987,624 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

• Frequency:
  • Genomes: 𝑓 0.000092 (0 hom., cov: 33)
  • Exomes 𝑓: 0.00021 (0 hom.)
• Consequence: ASS1 NM_054012.4 intron
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -1.40
• Publications: 0 publications found

Genes affected

ASS1 (HGNC:758): (argininosuccinate synthase 1) The protein encoded by this gene catalyzes the penultimate step of the arginine biosynthetic pathway. There are approximately 10 to 14 copies of this gene including the pseudogenes scattered across the human genome, among which the one located on chromosome 9 appears to be the only functional gene for argininosuccinate synthetase. Mutations in the chromosome 9 copy of this gene cause citrullinemia. Two transcript variants encoding the same protein have been found for this gene. [provided by RefSeq, Aug 2012]

ASS1 Gene-Disease associations (from GenCC):

• citrullinemia type I

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, Myriad Women’s Health, ClinGen, Labcorp Genetics (formerly Invitae)
• acute neonatal citrullinemia type I

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• adult-onset citrullinemia type I

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_benign. The variant received -6 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.8).
• BP6: Variant 9-130450309-C-T is Benign according to our data. Variant chr9-130450309-C-T is described in ClinVar as Likely_benign. ClinVar VariationId is 390066.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_054012.4. 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
	ASS1	NM_054012.4	MANE Select	c.-5-1915C>T		intron	N/A	NP_446464.1	Q5T6L4
	ASS1	NM_000050.4		c.-30C>T		5_prime_UTR_premature_start_codon_gain	Exon 2 of 16	NP_000041.2	P00966
	ASS1	NM_000050.4		c.-30C>T		5_prime_UTR	Exon 2 of 16	NP_000041.2	P00966

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ASS1	ENST00000352480.10	TSL:1 MANE Select	c.-5-1915C>T		intron	N/A	ENSP00000253004.6	P00966
	ASS1	ENST00000852198.1		c.-30C>T		5_prime_UTR_premature_start_codon_gain	Exon 2 of 16	ENSP00000522257.1
	ASS1	ENST00000372393.7	TSL:5	c.-30C>T		5_prime_UTR_premature_start_codon_gain	Exon 2 of 16	ENSP00000361469.2	P00966

Frequencies

GnomAD3 genomes AF: 0.0000920 AC: 14 AN: 152176 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.0000483

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000176

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.000214 AC: 179 AN: 835330 Hom.: 0 Cov.: 29 AF XY: 0.000210 AC XY: 81 AN XY: 385888

African (AFR) AF: 0.0000631 AC: 1 AN: 15840

American (AMR) AF: 0.00 AC: 0 AN: 992

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 5158

East Asian (EAS) AF: 0.00 AC: 0 AN: 3632

South Asian (SAS) AF: 0.00 AC: 0 AN: 16518

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 786

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 2726

European-Non Finnish (NFE) AF: 0.000218 AC: 166 AN: 762198

Other (OTH) AF: 0.000437 AC: 12 AN: 27480

GnomAD4 genome AF: 0.0000919 AC: 14 AN: 152294 Hom.: 0 Cov.: 33 AF XY: 0.000148 AC XY: 11 AN XY: 74472

African (AFR) AF: 0.0000481 AC: 2 AN: 41558

American (AMR) AF: 0.00 AC: 0 AN: 15294

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5180

South Asian (SAS) AF: 0.00 AC: 0 AN: 4824

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10626

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.000176 AC: 12 AN: 68024

Other (OTH) AF: 0.00 AC: 0 AN: 2110

Alfa AF: 0.000214 Hom.: 0

Bravo AF: 0.0000869

ClinVar

ClinVar submissions as Germline

Significance: Likely benign

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	-	1	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.80
CADD	Benign	0.79
DANN	Benign	0.55
PhyloP100		-1.4
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1

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

Other links and lift over

dbSNP: rs549216391; hg19: chr9-133325696;