rs67156896
Positions:
Variant summary
Our verdict is Pathogenic. Variant got 11 ACMG points: 11P and 0B. PM1PM2PM5PP3_StrongPP5
The NM_000531.6(OTC):c.791C>A(p.Thr264Asn) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T264A) has been classified as Pathogenic.
Frequency
Genomes: not found (cov: 23)
Consequence
OTC
NM_000531.6 missense
NM_000531.6 missense
Scores
11
5
1
Clinical Significance
Conservation
PhyloP100: 5.68
Genes affected
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]
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ACMG classification
Classification made for transcript
Verdict is Pathogenic. Variant got 11 ACMG points.
PM1
?
In a hotspot region, there are 8 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 7 uncertain in NM_000531.6
PM2
?
Very rare variant in population databases, with high coverage;
PM5
?
Other missense variant is known to change same aminoacid residue: Variant chrX-38408948-A-G is described in ClinVar as [Pathogenic]. Clinvar id is 97326.Status of the report is criteria_provided_single_submitter, 1 stars.
PP3
?
MetaRNN computational evidence supports a deleterious effect, 0.988
PP5
?
Variant X-38408949-C-A is Pathogenic according to our data. Variant chrX-38408949-C-A is described in ClinVar as [Pathogenic]. Clinvar id is 97327.Status of the report is no_assertion_criteria_provided, 0 stars.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
OTC | NM_000531.6 | c.791C>A | p.Thr264Asn | missense_variant | 8/10 | ENST00000039007.5 | |
OTC | NM_001407092.1 | c.791C>A | p.Thr264Asn | missense_variant | 10/12 | ||
OTC | XM_017029556.2 | c.791C>A | p.Thr264Asn | missense_variant | 8/9 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
OTC | ENST00000039007.5 | c.791C>A | p.Thr264Asn | missense_variant | 8/10 | 1 | NM_000531.6 | P1 | |
OTC | ENST00000643344.1 | c.*541C>A | 3_prime_UTR_variant, NMD_transcript_variant | 9/11 |
Frequencies
GnomAD3 genomes ? Cov.: 23
GnomAD3 genomes
?
Cov.:
23
GnomAD4 exome Cov.: 31
GnomAD4 exome
Cov.:
31
GnomAD4 genome ? Cov.: 23
GnomAD4 genome
?
Cov.:
23
ClinVar
Significance: Pathogenic
Submissions summary: Pathogenic:1
Revision: no assertion criteria provided
LINK: link
Submissions by phenotype
not provided Pathogenic:1
Pathogenic, no assertion criteria provided | literature only | GenMed Metabolism Lab | - | - - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
BayesDel_addAF
Pathogenic
D
BayesDel_noAF
Pathogenic
CADD
Uncertain
DANN
Uncertain
DEOGEN2
Pathogenic
D
FATHMM_MKL
Uncertain
D
LIST_S2
Pathogenic
D
M_CAP
Pathogenic
D
MetaRNN
Pathogenic
D
MetaSVM
Pathogenic
D
MutationAssessor
Pathogenic
H
MutationTaster
Benign
D
PrimateAI
Uncertain
T
PROVEAN
Pathogenic
D
REVEL
Pathogenic
Sift
Uncertain
D
Sift4G
Uncertain
D
Polyphen
P
Vest4
MutPred
Gain of helix (P = 0.0425);
MVP
MPC
ClinPred
D
GERP RS
Varity_R
gMVP
Splicing
Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at