chr9-133351927-T-C

Variant names:

• chr9-133351927-T-C
• NM_003172.4:c.889A>G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 4P and 2B. PM1 PM2 BP4_Moderate

The NM_003172.4(SURF1):​c.889A>G​(p.Thr297Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 15/21 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)
• Consequence: SURF1 NM_003172.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.03

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 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=0.103679866).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SURF1	NM_003172.4	c.889A>G	p.Thr297Ala	missense_variant	Exon 9 of 9	ENST00000371974.8	NP_003163.1
SURF1	NM_001280787.1	c.562A>G	p.Thr188Ala	missense_variant	Exon 8 of 8		NP_001267716.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SURF1	ENST00000371974.8	c.889A>G	p.Thr297Ala	missense_variant	Exon 9 of 9	1	NM_003172.4	ENSP00000361042.3
SURF1	ENST00000615505.4	c.562A>G	p.Thr188Ala	missense_variant	Exon 8 of 8	1		ENSP00000482067.1
SURF1	ENST00000437995.1	n.799A>G		non_coding_transcript_exon_variant	Exon 8 of 8	5
SURF1	ENST00000495952.5	n.879A>G		non_coding_transcript_exon_variant	Exon 5 of 5	2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.070
BayesDel_addAF	Benign	-0.13	T
BayesDel_noAF	Benign	-0.43
CADD	Benign	0.32
DANN	Benign	0.69
DEOGEN2	Benign	0.28	T;.
Eigen	Benign	-1.3
Eigen_PC	Benign	-1.4
FATHMM_MKL	Benign	0.24	N
M_CAP	Uncertain	0.20	D
MetaRNN	Benign	0.10	T;T
MetaSVM	Benign	-0.41	T
MutationAssessor	Benign	1.8	L;.
PrimateAI	Benign	0.35	T
PROVEAN	Benign	-0.72	N;.
REVEL	Benign	0.10
Sift	Benign	0.48	T;.
Sift4G	Benign	0.33	T;T
Polyphen		0.036	B;.
Vest4		0.050
MutPred		0.44		Gain of MoRF binding (P = 0.1386);.;
MVP		0.63
MPC		0.024
ClinPred		0.16	T
GERP RS		-4.1
Varity_R		0.035
gMVP		0.71

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr9-136218782;