rs782623477

Variant names:

• chr9-133352509-G-A
• rs782623477
• NM_003172.4:c.688C>T

Variant summary

Our verdict is Pathogenic. The variant received 20 ACMG points: 20P and 0B. PVS1 PS3 PP5_Very_Strong

The NM_003172.4(SURF1):​c.688C>T​(p.Arg230*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000489 in 1,614,114 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 Pathogenic (★★). ClinVar reports functional evidence for this variant: "SCV000329713: Published functional studies demonstrate a damaging effect as this variant is associated with reduced COX complexes and accumulation of incomplete COX assemblies (Pecina et al., 2003).". Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: 𝑓 0.000066 (0 hom., cov: 33)
  • Exomes 𝑓: 0.000047 (0 hom.)
• Consequence: SURF1 NM_003172.4 stop_gained
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:5
• Conservation: PhyloP100: 3.19
• Publications: 10 publications found

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 Gene-Disease associations (from GenCC):

• Leigh syndrome

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: ClinGen, Labcorp Genetics (formerly Invitae)
• mitochondrial complex IV deficiency, nuclear type 1

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: PanelApp Australia, G2P
• mitochondrial disease

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
• Charcot-Marie-Tooth disease type 4K

  Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: PanelApp Australia, Orphanet, Labcorp Genetics (formerly Invitae)
• Leigh syndrome with cardiomyopathy

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• Leigh syndrome with leukodystrophy

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Pathogenic. The variant received 20 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PS3: PS3 evidence extracted from ClinVar submissions: SCV000329713: Published functional studies demonstrate a damaging effect as this variant is associated with reduced COX complexes and accumulation of incomplete COX assemblies (Pecina et al., 2003).
• PP5: Variant 9-133352509-G-A is Pathogenic according to our data. Variant chr9-133352509-G-A is described in ClinVar as Pathogenic. ClinVar VariationId is 280010.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_003172.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SURF1	NM_003172.4	MANE Select	c.688C>T	p.Arg230*	stop_gained	Exon 7 of 9	NP_003163.1	Q15526-1
	SURF1	NM_001280787.1		c.361C>T	p.Arg121*	stop_gained	Exon 6 of 8	NP_001267716.1	A0A087WYS9

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SURF1	ENST00000371974.8	TSL:1 MANE Select	c.688C>T	p.Arg230*	stop_gained	Exon 7 of 9	ENSP00000361042.3	Q15526-1
	SURF1	ENST00000615505.4	TSL:1	c.361C>T	p.Arg121*	stop_gained	Exon 6 of 8	ENSP00000482067.1	A0A087WYS9
	SURF1	ENST00000886676.1		c.658C>T	p.Arg220*	stop_gained	Exon 7 of 9	ENSP00000556735.1

Frequencies

GnomAD3 genomes AF: 0.0000657 AC: 10 AN: 152224 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.0000241

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: 0.0000942

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000588

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.000111 AC: 28 AN: 251462 AF XY: 0.000103

Gnomad AFR exome AF: 0.0000615

Gnomad AMR exome AF: 0.000231

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000158

Gnomad OTH exome AF: 0.000163

GnomAD4 exome AF: 0.0000472 AC: 69 AN: 1461890 Hom.: 0 Cov.: 32 AF XY: 0.0000454 AC XY: 33 AN XY: 727244

African (AFR) AF: 0.0000597 AC: 2 AN: 33480

American (AMR) AF: 0.000201 AC: 9 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86256

European-Finnish (FIN) AF: 0.0000187 AC: 1 AN: 53420

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.0000477 AC: 53 AN: 1112010

Other (OTH) AF: 0.0000662 AC: 4 AN: 60396

GnomAD4 genome AF: 0.0000657 AC: 10 AN: 152224 Hom.: 0 Cov.: 33 AF XY: 0.0000538 AC XY: 4 AN XY: 74372

African (AFR) AF: 0.0000241 AC: 1 AN: 41454

American (AMR) AF: 0.000262 AC: 4 AN: 15286

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5196

South Asian (SAS) AF: 0.00 AC: 0 AN: 4836

European-Finnish (FIN) AF: 0.0000942 AC: 1 AN: 10620

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.0000588 AC: 4 AN: 68044

Other (OTH) AF: 0.00 AC: 0 AN: 2088

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000718

ExAC AF: 0.000165 AC: 20

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
2	-	-	Leigh syndrome (2)
2	-	-	not provided (2)
1	-	-	Charcot-Marie-Tooth disease type 4K;C5435656:Mitochondrial complex IV deficiency, nuclear type 1 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.42	D
BayesDel_noAF	Pathogenic	0.62
CADD	Pathogenic	36
DANN	Uncertain	1.0
Eigen	Uncertain	0.55
Eigen_PC	Uncertain	0.37
FATHMM_MKL	Uncertain	0.97	D
PhyloP100		3.2
Vest4		0.92
GERP RS		3.5
Mutation Taster		=2/198	disease causing (ClinVar)

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

Other links and lift over

dbSNP: rs782623477; hg19: chr9-136219364;