8-96231086-C-T

Position:

chr8-96231086-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_006294.5(UQCRB):c.305G>A(p.Arg102Lys) variant causes a missense change. The variant allele was found at a frequency of 0.0000155 in 1,613,930 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/18 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000079 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000089 ( 0 hom. )

Consequence

UQCRB
NM_006294.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 4.69

Variant links:

Genes affected

UQCRB (HGNC:12582): (ubiquinol-cytochrome c reductase binding protein) This gene encodes a subunit of the ubiquinol-cytochrome c oxidoreductase complex, which consists of one mitochondrial-encoded and 10 nuclear-encoded subunits. The protein encoded by this gene binds ubiquinone and participates in the transfer of electrons when ubiquinone is bound. This protein plays an important role in hypoxia-induced angiogenesis through mitochondrial reactive oxygen species-mediated signaling. Mutations in this gene are associated with mitochondrial complex III deficiency. Alternatively spliced transcript variants have been found for this gene. Related pseudogenes have been identified on chromosomes 1, 5 and X. [provided by RefSeq, Dec 2011]

UQCRB links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

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=0.12502465).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
UQCRB	NM_006294.5 link	c.305G>A	p.Arg102Lys	missense_variant	4/4	ENST00000287022.10	NP_006285.1	P14927-1
UQCRB	NM_001199975.3 link	c.209G>A	p.Arg70Lys	missense_variant	5/5		NP_001186904.1	P14927
UQCRB	NM_001254752.2 link	c.*19G>A		3_prime_UTR_variant	5/5		NP_001241681.1	P14927-2
UQCRB	NR_045639.2 link	n.610G>A		non_coding_transcript_exon_variant	5/5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
UQCRB	ENST00000287022.10 link	c.305G>A	p.Arg102Lys	missense_variant	4/4	1	NM_006294.5	ENSP00000287022.5		P14927-1

Frequencies

GnomAD3 genomes

AF:

0.0000788

AC:

AN:

152222

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000289

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000279

AC:

AN:

250824

Hom.:

AF XY:

0.0000147

AC XY:

AN XY:

135644

show subpopulations

Gnomad AFR exome

AF:

0.000373

Gnomad AMR exome

AF:

0.0000289

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:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000889

AC:

AN:

1461590

Hom.:

Cov.:

AF XY:

0.0000110

AC XY:

AN XY:

727118

show subpopulations

Gnomad4 AFR exome

AF:

0.000269

Gnomad4 AMR exome

AF:

0.0000447

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:

0.00

Gnomad4 OTH exome

AF:

0.0000331

GnomAD4 genome

AF:

0.0000788

AC:

AN:

152340

Hom.:

Cov.:

AF XY:

0.000107

AC XY:

AN XY:

74494

show subpopulations

Gnomad4 AFR

AF:

0.000289

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000712

Hom.:

Bravo

AF:

0.000110

ESP6500AA

AF:

0.000681

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000330

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 09, 2024

The c.305G>A (p.R102K) alteration is located in exon 4 (coding exon 4) of the UQCRB gene. This alteration results from a G to A substitution at nucleotide position 305, causing the arginine (R) at amino acid position 102 to be replaced by a lysine (K). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Mitochondrial complex III deficiency nuclear type 3

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Pittsburgh Clinical Genomics Laboratory, University of Pittsburgh Medical Center

Nov 17, 2023

This sequence variant is a single nucleotide substitution (G>A) at position 305 of the coding sequence of the UQCRB gene that results in an arginine to lysine amino acid change at residue 102 of the ubiquinol-cytochrome c reductase binding protein. This variant is absent from ClinVar and has not been reported in the literature in individuals with UQCRB-related disease, to our knowledge. This variant is present in 19 of 403046 alleles (0.0047%) in the gnomAD population dataset. Multiple bioinformatic tools predict that this arginine to lysine amino acid change would be neutral, and the Arg102 residue at this position is highly conserved across the vertebrate species examined. Studies examining the functional consequence of this variant have not been performed, to our knowledge. At this time, there is insufficient evidence to determine if this variant is pathogenic or benign. Therefore, we consider this a variant of uncertain significance. ACMG Criteria: BP4, PM2 -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.16

BayesDel_addAF

Benign

-0.31

BayesDel_noAF

Benign

-0.38

CADD

Benign

DANN

Benign

0.96

DEOGEN2

Benign

0.062

Eigen

Uncertain

0.36

Eigen_PC

Uncertain

0.40

FATHMM_MKL

Uncertain

0.94

LIST_S2

Benign

0.76

M_CAP

Benign

0.0043

MetaRNN

Benign

0.13

MetaSVM

Benign

-0.96

MutationAssessor

Benign

1.5

PROVEAN

Benign

-1.9

REVEL

Benign

0.091

Sift

Benign

0.10

Sift4G

Benign

0.19

Polyphen

0.91

Vest4

0.15

MVP

0.45

ClinPred

0.12

GERP RS

3.9

Varity_R

0.65

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over