chr8-106658026-C-T

Position:

• chr8-106658026-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The ENST00000312046.10(OXR1):​c.40C>T​(p.Leu14Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000274 in 1,096,274 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 10/15 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000027 (0 hom.)
• Consequence: OXR1 ENST00000312046.10 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.08

Genes affected

OXR1 (HGNC:15822): (oxidation resistance 1) Predicted to enable oxidoreductase activity. Predicted to be involved in response to oxidative stress. Predicted to act upstream of or within several processes, including adult walking behavior; negative regulation of neuron death; and negative regulation of peptidyl-cysteine S-nitrosylation. Predicted to be located in mitochondrion and nucleolus. Predicted to be active in nucleus. Implicated in cerebellar hyplasia/atrophy, epilepsy, and global developmental delay. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.12050924).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
OXR1	NM_001198533.2	c.221-21184C>T		intron_variant		ENST00000517566.7	NP_001185462.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
OXR1	ENST00000517566.7	c.221-21184C>T		intron_variant		1	NM_001198533.2	ENSP00000429205	P3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000274 AC: 3 AN: 1096274 Hom.: 0 Cov.: 33 AF XY: 0.00000580 AC XY: 3 AN XY: 517652

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.000153

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Congenital cerebellar hypoplasia Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Victorian Clinical Genetics Services, Murdoch Childrens Research Institute

Sep 02, 2022

Based on the classification scheme VCGS_Germline_v1.3.4, this variant is classified as VUS-3C. Following criteria are met: 0102 - Loss of function is a known mechanism of disease in this gene and is associated with cerebellar hypoplasia/atrophy, epilepsy, and global developmental delay (MIM#213000). (I) 0106 - This gene is associated with autosomal recessive disease. (I) 0200 - Variant is predicted to result in a missense amino acid change from leucine to phenylalanine. (I) 0219 - This variant is non-coding in an alternative transcript. This variant is deep intronic (c.221-21184C>T) within the ClinVar predominant transcript (NM_001198533.2). The transcripts NM_018002.3 and NM_001198532.1, as well as NM_181354.4 have been reported to be expressed in the central nervous system (PMID:31785787). 0252 - This variant is homozygous. (I) 0301 - Variant is absent from gnomAD (both v2 and v3). (SP) 0503 - Missense variant consistently predicted to be tolerated by multiple in silico tools or not conserved in placental mammals with a minor amino acid change. (SB) 0604 - Variant is not located in an established domain, motif, hotspot or informative constraint region. (I) 0705 - No comparable missense variants have previous evidence for pathogenicity. (I) 0807 - This variant has no previous evidence of pathogenicity. (I) 0905 - No published segregation evidence has been identified for this variant. (I) 1007 - No published functional evidence has been identified for this variant. (I) 1208 - Inheritance information for this variant is not currently available in this individual. (I) Legend: (SP) - Supporting pathogenic, (I) - Information, (SB) - Supporting benign -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Benign	-0.22	T
BayesDel_noAF	Benign	-0.55
CADD	Benign	20
DANN	Uncertain	0.99
Eigen	Benign	-0.36
Eigen_PC	Benign	-0.31
FATHMM_MKL	Uncertain	0.90	D
LIST_S2	Benign	0.76	T
M_CAP	Pathogenic	0.44	D
MetaRNN	Benign	0.12	T
MetaSVM	Benign	-1.1	T
MutationTaster	Benign	1.0	D;D;D;D;D;D;N
PROVEAN	Benign	-0.080	N
REVEL	Benign	0.031
Sift	Uncertain	0.011	D
Sift4G	Uncertain	0.036	D
Polyphen		0.0030	B
Vest4		0.14
MutPred		0.26		Loss of helix (P = 0.079);
MVP		0.30
ClinPred		0.42	T
GERP RS		3.1

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

Publications

LitVar

Other links and lift over

dbSNP: rs894986182; hg19: chr8-107670254;