Genetic Variant NM_003172.4:c.745A>C (chr9-133352452-T-G) – ACMG Classification: Uncertain_significance (3 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 4P and 1B. PM1PM2BP4

The NM_003172.4(SURF1):c.745A>C(p.Asn249His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,882 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

SURF1
NM_003172.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 3.46

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:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 3 ACMG points.

PM1

In a chain Surfeit locus protein 1 (size 299) in uniprot entity SURF1_HUMAN there are 17 pathogenic changes around while only 2 benign (89%) in NM_003172.4

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.3717828).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SURF1	NM_003172.4 link	c.745A>C	p.Asn249His	missense_variant	Exon 7 of 9	ENST00000371974.8	NP_003163.1	Q15526-1E5KRX5
SURF1	NM_001280787.1 link	c.418A>C	p.Asn140His	missense_variant	Exon 6 of 8		NP_001267716.1	Q15526A0A087WYS9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
SURF1	ENST00000371974.8 link	c.745A>C	p.Asn249His	missense_variant	Exon 7 of 9	1	NM_003172.4	ENSP00000361042.3	Q15526-1
SURF1	ENST00000615505.4 link	c.418A>C	p.Asn140His	missense_variant	Exon 6 of 8	1		ENSP00000482067.1	A0A087WYS9
SURF1	ENST00000437995.1 link	n.655A>C		non_coding_transcript_exon_variant	Exon 6 of 8	5
SURF1	ENST00000495952.5 link	n.735A>C		non_coding_transcript_exon_variant	Exon 3 of 5	2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461882

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727238

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

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

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.12

BayesDel_addAF

Uncertain

0.023

BayesDel_noAF

Benign

-0.20

CADD

Benign

DANN

Benign

0.90

DEOGEN2

Uncertain

0.75

D;.

Eigen

Benign

-0.61

Eigen_PC

Benign

-0.59

FATHMM_MKL

Uncertain

0.97

M_CAP

Uncertain

0.17

MetaRNN

Benign

0.37

T;T

MetaSVM

Uncertain

-0.18

MutationAssessor

Benign

1.5

L;.

PrimateAI

Benign

0.38

PROVEAN

Benign

-1.7

N;.

REVEL

Benign

0.26

Sift

Benign

0.046

D;.

Sift4G

Benign

0.57

T;T

Polyphen

0.30

B;.

Vest4

0.36

MutPred

0.54

Loss of stability (P = 0.0248);.;

MVP

0.78

MPC

0.088

ClinPred

0.58

GERP RS

0.76

Varity_R

0.081

gMVP

0.68

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.050

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

No publications associated with this variant yet.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over