9-128323089-G-T

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM1PM2PP3_Moderate

The NM_016035.5(COQ4):​c.144G>T​(p.Gln48His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000445 in 1,459,730 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 33)
Exomes 𝑓: 0.000045 ( 0 hom. )

Consequence

COQ4
NM_016035.5 missense

Scores

4
12
3

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.60
Variant links:
Genes affected
COQ4 (HGNC:19693): (coenzyme Q4) This gene encodes a component of the coenzyme Q biosynthesis pathway. Coenzyme Q, an essential component of the electron transport chain, shuttles electrons between complexes I or II to complex III of the mitochondrial transport chain. This protein appears to play a structural role in stabilizing a complex that contains most of the coenzyme Q biosynthesis enzymes. Mutations in this gene are associated with mitochondrial disorders linked to coenzyme Q deficiency. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Apr 2015]

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

PM1
In a chain Ubiquinone biosynthesis protein COQ4 homolog, mitochondrial (size 234) in uniprot entity COQ4_HUMAN there are 27 pathogenic changes around while only 3 benign (90%) in NM_016035.5
PM2
Very rare variant in population databases, with high coverage;
PP3
MetaRNN computational evidence supports a deleterious effect, 0.862

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect Exon rank MANE Protein UniProt
COQ4NM_016035.5 linkc.144G>T p.Gln48His missense_variant Exon 2 of 7 ENST00000300452.8 NP_057119.3 Q9Y3A0-1

Ensembl

Gene Transcript HGVSc HGVSp Effect Exon rank TSL MANE Protein Appris UniProt
COQ4ENST00000300452.8 linkc.144G>T p.Gln48His missense_variant Exon 2 of 7 1 NM_016035.5 ENSP00000300452.3 Q9Y3A0-1
COQ4ENST00000372875.3 linkc.144G>T p.Gln48His missense_variant Exon 2 of 4 2 ENSP00000361966.3 Q5T4B9
COQ4ENST00000608951.5 linkc.144G>T p.Gln48His missense_variant Exon 2 of 3 2 ENSP00000476323.1 V9GY32
COQ4ENST00000609948.1 linkc.144G>T p.Gln48His missense_variant Exon 2 of 2 2 ENSP00000477292.1 V9GZ09

Frequencies

GnomAD3 genomes
Cov.:
33
GnomAD3 exomes
AF:
0.0000167
AC:
4
AN:
239160
Hom.:
0
AF XY:
0.0000305
AC XY:
4
AN XY:
131288
show subpopulations
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 SAS exome
AF:
0.00
Gnomad FIN exome
AF:
0.00
Gnomad NFE exome
AF:
0.0000381
Gnomad OTH exome
AF:
0.00
GnomAD4 exome
AF:
0.0000445
AC:
65
AN:
1459730
Hom.:
0
Cov.:
31
AF XY:
0.0000509
AC XY:
37
AN XY:
726230
show subpopulations
Gnomad4 AFR exome
AF:
0.0000299
Gnomad4 AMR exome
AF:
0.00
Gnomad4 ASJ exome
AF:
0.00
Gnomad4 EAS exome
AF:
0.00
Gnomad4 SAS exome
AF:
0.00
Gnomad4 FIN exome
AF:
0.00
Gnomad4 NFE exome
AF:
0.0000558
Gnomad4 OTH exome
AF:
0.0000331
GnomAD4 genome
Cov.:
33
Alfa
AF:
0.0000711
Hom.:
0
Bravo
AF:
0.0000264
ExAC
AF:
0.0000249
AC:
3
EpiCase
AF:
0.0000545
EpiControl
AF:
0.00

ClinVar

Significance: Uncertain significance
Submissions summary: Uncertain:1
Revision: criteria provided, single submitter
LINK: link

Submissions by phenotype

Neonatal encephalomyopathy-cardiomyopathy-respiratory distress syndrome Uncertain:1
Jan 24, 2018
Labcorp Genetics (formerly Invitae), Labcorp
Significance: Uncertain significance
Review Status: criteria provided, single submitter
Collection Method: clinical testing

Algorithms developed to predict the effect of missense changes on protein structure and function do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. This variant has not been reported in the literature in individuals with COQ4-related disease. This variant is present in population databases (rs765791496, ExAC 0.002%). This sequence change replaces glutamine with histidine at codon 48 of the COQ4 protein (p.Gln48His). The glutamine residue is highly conserved and there is a small physicochemical difference between glutamine and histidine. -

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
0.88
BayesDel_addAF
Uncertain
0.13
D
BayesDel_noAF
Uncertain
0.070
CADD
Uncertain
24
DANN
Uncertain
1.0
DEOGEN2
Uncertain
0.74
D;D;.;.
Eigen
Uncertain
0.48
Eigen_PC
Uncertain
0.35
FATHMM_MKL
Benign
0.65
D
LIST_S2
Uncertain
0.92
D;D;D;D
M_CAP
Uncertain
0.13
D
MetaRNN
Pathogenic
0.86
D;D;D;D
MetaSVM
Benign
-0.37
T
MutationAssessor
Pathogenic
3.6
H;.;.;.
PrimateAI
Uncertain
0.63
T
PROVEAN
Uncertain
-3.9
D;.;.;D
REVEL
Uncertain
0.53
Sift
Uncertain
0.0010
D;.;.;D
Sift4G
Pathogenic
0.0010
D;D;D;D
Polyphen
1.0
D;.;.;D
Vest4
0.86
MutPred
0.74
Loss of catalytic residue at Q48 (P = 0.0071);Loss of catalytic residue at Q48 (P = 0.0071);Loss of catalytic residue at Q48 (P = 0.0071);Loss of catalytic residue at Q48 (P = 0.0071);
MVP
0.60
MPC
1.2
ClinPred
0.99
D
GERP RS
1.7
RBP_binding_hub_radar
0.0
RBP_regulation_power_radar
2.7
Varity_R
0.90
gMVP
0.91

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

Below is the list of publications found by LitVar. It may be empty.

Other links and lift over

dbSNP: rs765791496; hg19: chr9-131085368; API