NM_003172.4:c.32_38dupTGCGGGC

Variant names:

Variant summary

Our verdict is Likely pathogenic. Variant got 8 ACMG points: 8P and 0B. PVS1_StrongPM2PP5_Moderate

The NM_003172.4(SURF1):c.32_38dupTGCGGGC(p.Leu16GlyfsTer46) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000218 in 1,379,008 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Pathogenic (★).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 33)

Exomes 𝑓: 8.1e-7 ( 0 hom. )

Consequence

SURF1
NM_003172.4 frameshift

Scores

Not classified

Clinical Significance

Pathogenic criteria provided, single submitter P:1

Conservation

PhyloP100: -0.397

Variant links:

Genes affected

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:

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:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 8 ACMG points.

PVS1

Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant located near the start codon (<100nt), not predicted to undergo nonsense mediated mRNA decay. There are 19 pathogenic variants in the truncated region.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 9-133356415-C-CGCCCGCA is Pathogenic according to our data. Variant chr9-133356415-C-CGCCCGCA is described in ClinVar as [Pathogenic]. Clinvar id is 456665.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SURF1	NM_003172.4 link	c.32_38dupTGCGGGC	p.Leu16GlyfsTer46	frameshift_variant	Exon 1 of 9	ENST00000371974.8	NP_003163.1	Q15526-1E5KRX5
SURF1	NM_001280787.1 link	c.-244_-238dupTGCGGGC		5_prime_UTR_variant	Exon 1 of 8		NP_001267716.1	Q15526A0A087WYS9
SURF2	NM_017503.5 link	c.-178_-177insGCCCGCA		upstream_gene_variant		ENST00000371964.5	NP_059973.4	Q15527
SURF2	NM_001278928.2 link	c.-178_-177insGCCCGCA		upstream_gene_variant			NP_001265857.1	Q15527

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SURF1	ENST00000371974.8 link	c.32_38dupTGCGGGC	p.Leu16GlyfsTer46	frameshift_variant	Exon 1 of 9	1	NM_003172.4	ENSP00000361042.3		Q15526-1
SURF2	ENST00000371964.5 link	c.-178_-177insGCCCGCA		upstream_gene_variant		1	NM_017503.5	ENSP00000361032.4		Q15527

Frequencies

GnomAD3 genomes

AF:

0.0000133

AC:

AN:

150142

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000501

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

GnomAD4 exome

AF:

8.14e-7

AC:

AN:

1228866

Hom.:

Cov.:

AF XY:

0.00000166

AC XY:

AN XY:

602008

show subpopulations

Gnomad4 AFR exome

AF:

0.0000444

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:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000133

AC:

AN:

150142

Hom.:

Cov.:

AF XY:

0.0000136

AC XY:

AN XY:

73350

show subpopulations

Gnomad4 AFR

AF:

0.0000501

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

Bravo

AF:

0.0000189

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Leigh syndrome

Pathogenic:1

Jan 08, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change creates a premature translational stop signal (p.Leu16Glyfs*46) in the SURF1 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in SURF1 are known to be pathogenic (PMID: 10443880, 22488715, 24027061). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with SURF1-related conditions. ClinVar contains an entry for this variant (Variation ID: 456665). For these reasons, this variant has been classified as Pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

Splicing

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