chrX-38352332-G-A

Position:

• chrX-38352332-G-A

Variant summary

Our verdict is Benign. Variant got -14 ACMG points: 0P and 14B. BP4_Strong BP6_Moderate BA1

The NM_001407092.1(OTC):​c.-79-286G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.134 in 111,471 control chromosomes in the GnomAD database, including 807 homozygotes. There are 4,317 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency: Genomes: 𝑓 0.13 (807 hom., 4317 hem., cov: 24)
• Consequence: OTC NM_001407092.1 intron
• Clinical Significance: Benign criteria provided, single submitter B:2
• Conservation: PhyloP100: 0.552

Genes affected

ENSG00000250349 (HGNC:):

OTC (HGNC:8512): (ornithine transcarbamylase) This nuclear gene encodes a mitochondrial matrix enzyme. The encoded protein is involved in the urea cycle which functions to detoxify ammonia into urea for excretion. Mutations in this enzyme lead to ornithine transcarbamylase deficiency, which causes hyperammonemia. [provided by RefSeq, May 2022]

ACMG classification

Verdict is Benign. Variant got -14 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.82).
• BP6: Variant X-38352332-G-A is Benign according to our data. Variant chrX-38352332-G-A is described in ClinVar as [Benign]. Clinvar id is 380178.Status of the report is criteria_provided_single_submitter, 1 stars.
• BA1: GnomAd4 highest subpopulation (NFE) allele frequency at 95% confidence interval = 0.165 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
OTC	NM_001407092.1	c.-79-286G>A		intron_variant			NP_001394021.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ENSG00000250349	ENST00000465127.1	c.172-313789G>A		intron_variant		5		ENSP00000417050.1

Frequencies

GnomAD3 genomes AF: 0.134 AC: 14878 AN: 111418 Hom.: 806 Cov.: 24 AF XY: 0.128 AC XY: 4306 AN XY: 33624

Gnomad AFR AF: 0.0877

Gnomad AMI AF: 0.127

Gnomad AMR AF: 0.101

Gnomad ASJ AF: 0.170

Gnomad EAS AF: 0.0581

Gnomad SAS AF: 0.165

Gnomad FIN AF: 0.141

Gnomad MID AF: 0.168

Gnomad NFE AF: 0.168

Gnomad OTH AF: 0.115

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.134 AC: 14890 AN: 111471 Hom.: 807 Cov.: 24 AF XY: 0.128 AC XY: 4317 AN XY: 33687

Gnomad4 AFR AF: 0.0878

Gnomad4 AMR AF: 0.101

Gnomad4 ASJ AF: 0.170

Gnomad4 EAS AF: 0.0583

Gnomad4 SAS AF: 0.166

Gnomad4 FIN AF: 0.141

Gnomad4 NFE AF: 0.168

Gnomad4 OTH AF: 0.112

Alfa AF: 0.153 Hom.: 1306

Bravo AF: 0.125

ClinVar

Significance: Benign

Submissions summary: Benign:2

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Benign:1

Benign, criteria provided, single submitter

clinical testing

GeneDx

Dec 02, 2015

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

Ornithine carbamoyltransferase deficiency Benign:1

Benign, no assertion criteria provided

clinical testing

Natera, Inc.

Sep 16, 2020

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.82
CADD	Benign	8.3
DANN	Benign	0.70

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

Publications

LitVar

Other links and lift over

dbSNP: rs5963030; hg19: chrX-38211585;