9-133356666-G-A

Variant names:

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_017503.5(SURF2):c.74G>A(p.Arg25His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000567 in 1,516,192 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/19 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. R25C) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.000059 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000056 ( 0 hom. )

Consequence

SURF2
NM_017503.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.414

Variant links:

Genes affected

SURF2 (HGNC:11475): (surfeit 2) This gene shares a bidirectional promoter with surfeit 1 (SURF1; GeneID: 6834), which is located on the opposite strand. It encodes a conserved protein that is expressed in a variety of tissues. [provided by RefSeq, Jul 2013]

SURF2 links:

SURF1 (HGNC:11474): (SURF1 cytochrome c oxidase assembly factor) This gene encodes a protein localized to the inner mitochondrial membrane and thought to be involved in the biogenesis of the cytochrome c oxidase complex. The protein is a member of the SURF1 family, which includes the related yeast protein SHY1 and rickettsial protein RP733. The gene is located in the surfeit gene cluster, a group of very tightly linked genes that do not share sequence similarity, where it shares a bidirectional promoter with SURF2 on the opposite strand. Defects in this gene are a cause of Leigh syndrome, a severe neurological disorder that is commonly associated with systemic cytochrome c oxidase deficiency. [provided by RefSeq, Jul 2008]

SURF1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.03717634).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SURF2	NM_017503.5 link	c.74G>A	p.Arg25His	missense_variant	Exon 1 of 6	ENST00000371964.5	NP_059973.4	Q15527
SURF2	NM_001278928.2 link	c.74G>A	p.Arg25His	missense_variant	Exon 1 of 6		NP_001265857.1	Q15527
SURF1	NM_003172.4 link	c.-213C>T		upstream_gene_variant		ENST00000371974.8	NP_003163.1	Q15526-1E5KRX5
SURF1	NM_001280787.1 link	c.-488C>T		upstream_gene_variant			NP_001267716.1	Q15526A0A087WYS9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SURF2	ENST00000371964.5 link	c.74G>A	p.Arg25His	missense_variant	Exon 1 of 6	1	NM_017503.5	ENSP00000361032.4		Q15527
SURF1	ENST00000371974.8 link	c.-213C>T		upstream_gene_variant		1	NM_003172.4	ENSP00000361042.3		Q15526-1

Frequencies

GnomAD3 genomes

AF:

0.0000592

AC:

AN:

152120

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000262

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:

0.0000735

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000145

AC:

AN:

110644

Hom.:

AF XY:

0.000146

AC XY:

AN XY:

61588

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000276

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000197

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000146

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000564

AC:

AN:

1364072

Hom.:

Cov.:

AF XY:

0.0000639

AC XY:

AN XY:

672750

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000268

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000233

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000430

Gnomad4 OTH exome

AF:

0.0000702

GnomAD4 genome

AF:

0.0000592

AC:

AN:

152120

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74312

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000262

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000735

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000831

ExAC

AF:

0.000165

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Mar 25, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.74G>A (p.R25H) alteration is located in exon 1 (coding exon 1) of the SURF2 gene. This alteration results from a G to A substitution at nucleotide position 74, causing the arginine (R) at amino acid position 25 to be replaced by a histidine (H). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.11

BayesDel_addAF

Benign

-0.36

BayesDel_noAF

Benign

-0.75

CADD

Benign

DANN

Uncertain

0.98

Eigen

Benign

-1.4

Eigen_PC

Benign

-1.5

FATHMM_MKL

Benign

0.0036

M_CAP

Benign

0.039

MetaRNN

Benign

0.037

MetaSVM

Benign

-1.0

PrimateAI

Uncertain

0.67

PROVEAN

Benign

-0.84

REVEL

Benign

0.016

Sift

Benign

0.20

Sift4G

Benign

0.20

Vest4

0.093

MutPred

0.49

Loss of MoRF binding (P = 0.0082);

MVP

0.16

MPC

0.072

ClinPred

0.029

GERP RS

-4.3

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.0

gMVP

0.24

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