NM_144639.3:c.40C>A

Variant names:

• chr3-126517680-G-T
• rs147828466
• NM_144639.3:c.40C>A

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_144639.3(UROC1):​c.40C>A​(p.Arg14Arg) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000691 in 1,447,556 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: UROC1 NM_144639.3 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.105
• Publications: 5 publications found

Genes affected

UROC1 (HGNC:26444): (urocanate hydratase 1) This gene encodes an enzyme involved in the second step of histidine catabolism, metabolizing urocanic acid to formiminoglutamic acid. Deficiency of this enzyme results in urocanic aciduria, and is an apparent cause of mental retardation. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Apr 2021]

UROC1 Gene-Disease associations (from GenCC):

• urocanic aciduria

  Inheritance: AR Classification: DEFINITIVE, SUPPORTIVE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), G2P, ClinGen, Orphanet

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.83).
• BP7: Synonymous conserved (PhyloP=-0.105 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_144639.3. 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
	UROC1	NM_144639.3	MANE Select	c.40C>A	p.Arg14Arg	synonymous	Exon 1 of 20	NP_653240.1
	UROC1	NM_001165974.2		c.40C>A	p.Arg14Arg	synonymous	Exon 1 of 21	NP_001159446.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	UROC1	ENST00000290868.7	TSL:1 MANE Select	c.40C>A	p.Arg14Arg	synonymous	Exon 1 of 20	ENSP00000290868.2
	UROC1	ENST00000383579.3	TSL:1	c.40C>A	p.Arg14Arg	synonymous	Exon 1 of 21	ENSP00000373073.3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD2 exomes AF: 0.00000456 AC: 1 AN: 219108 AF XY: 0.00000838

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000104

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 6.91e-7 AC: 1 AN: 1447556 Hom.: 0 Cov.: 32 AF XY: 0.00000139 AC XY: 1 AN XY: 719070

African (AFR) AF: 0.00 AC: 0 AN: 33134

American (AMR) AF: 0.00 AC: 0 AN: 42718

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25814

East Asian (EAS) AF: 0.00 AC: 0 AN: 38936

South Asian (SAS) AF: 0.00 AC: 0 AN: 84466

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 51256

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5472

European-Non Finnish (NFE) AF: 9.04e-7 AC: 1 AN: 1105994

Other (OTH) AF: 0.00 AC: 0 AN: 59766

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.83
CADD	Benign	3.2
DANN	Benign	0.62
PhyloP100		-0.10
PromoterAI		0.0091	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.2

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: rs147828466; hg19: chr3-126236523;