22-50523648-C-T

Position:

chr22-50523648-C-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 0P and 2B. BP4_Moderate

The NM_005138.3(SCO2):c.764G>A(p.Arg255Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000452 in 1,613,922 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R255L) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00011 ( 0 hom., cov: 34)

Exomes 𝑓: 0.000038 ( 0 hom. )

Consequence

SCO2
NM_005138.3 missense

Scores

Clinical Significance

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

Conservation

PhyloP100: 0.0610

Variant links:

Genes affected

SCO2 (HGNC:10604): (synthesis of cytochrome C oxidase 2) Cytochrome c oxidase (COX) catalyzes the transfer of electrons from cytochrome c to molecular oxygen, which helps to maintain the proton gradient across the inner mitochondrial membrane that is necessary for aerobic ATP production. Human COX is a multimeric protein complex that requires several assembly factors; this gene encodes one of the COX assembly factors. The encoded protein is a metallochaperone that is involved in the biogenesis of cytochrome c oxidase subunit II. Mutations in this gene are associated with fatal infantile encephalocardiomyopathy and myopia 6. [provided by RefSeq, Oct 2014]

SCO2 links:

NCAPH2 (HGNC:25071): (non-SMC condensin II complex subunit H2) This gene encodes one of the non-SMC subunits of the condensin II complex. This complex plays an essential role in mitotic chromosome assembly. Alternate splicing of this gene results in multiple transcript variants.[provided by RefSeq, May 2010]

NCAPH2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.115920514).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SCO2	NM_005138.3 linkuse as main transcript	c.764G>A	p.Arg255Gln	missense_variant	2/2	ENST00000395693.8
NCAPH2	NM_152299.4 linkuse as main transcript	c.*273C>T		3_prime_UTR_variant	20/20	ENST00000420993.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SCO2	ENST00000395693.8 linkuse as main transcript	c.764G>A	p.Arg255Gln	missense_variant	2/2	1	NM_005138.3	P1
NCAPH2	ENST00000420993.7 linkuse as main transcript	c.*273C>T		3_prime_UTR_variant	20/20	1	NM_152299.4	P4	Q6IBW4-1

Frequencies

GnomAD3 genomes

AF:

0.000112

AC:

AN:

152218

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000145

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000327

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.0000588

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.0000398

AC:

AN:

251258

Hom.:

AF XY:

0.0000589

AC XY:

AN XY:

135856

show subpopulations

Gnomad AFR exome

AF:

0.000123

Gnomad AMR exome

AF:

0.0000578

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000163

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000264

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000383

AC:

AN:

1461586

Hom.:

Cov.:

AF XY:

0.0000358

AC XY:

AN XY:

727102

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000447

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000756

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000450

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.000112

AC:

AN:

152336

Hom.:

Cov.:

AF XY:

0.000121

AC XY:

AN XY:

74502

show subpopulations

Gnomad4 AFR

AF:

0.000144

Gnomad4 AMR

AF:

0.000327

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000588

Gnomad4 OTH

AF:

0.000473

Alfa

AF:

0.0000565

Hom.:

Bravo

AF:

0.0000982

ExAC

AF:

0.0000494

AC:

EpiCase

AF:

0.000164

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Invitae	Sep 01, 2022	This sequence change replaces arginine, which is basic and polar, with glutamine, which is neutral and polar, at codon 255 of the SCO2 protein (p.Arg255Gln). This variant is present in population databases (rs368908383, gnomAD 0.02%). This variant has not been reported in the literature in individuals affected with SCO2-related conditions. ClinVar contains an entry for this variant (Variation ID: 215129). Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The glutamine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. 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. -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Jan 04, 2023	In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.089

BayesDel_addAF

Benign

-0.25

BayesDel_noAF

Benign

-0.33

CADD

Benign

DANN

Benign

0.85

DEOGEN2

Benign

0.40

T;T;T;T

Eigen

Benign

-1.1

Eigen_PC

Benign

-1.1

FATHMM_MKL

Benign

0.69

M_CAP

Benign

0.046

MetaRNN

Benign

0.12

T;T;T;T

MetaSVM

Benign

-0.63

MutationAssessor

Benign

1.8

L;L;L;L

MutationTaster

Benign

0.91

D;D;D;D

PrimateAI

Benign

0.27

PROVEAN

Benign

-0.62

N;N;N;N

REVEL

Benign

0.23

Sift

Benign

0.56

T;T;T;T

Sift4G

Benign

0.60

T;T;T;T

Polyphen

0.53

P;P;P;P

Vest4

0.23

MutPred

0.47

Loss of MoRF binding (P = 0.0164);Loss of MoRF binding (P = 0.0164);Loss of MoRF binding (P = 0.0164);Loss of MoRF binding (P = 0.0164);

MVP

0.70

MPC

0.039

ClinPred

0.016

GERP RS

-0.89

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.038

gMVP

0.52

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.

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