11-61430156-T-G

Position:

• chr11-61430156-T-G

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_017841.4(SDHAF2):​c.10T>G​(p.Ser4Ala) 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. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: SDHAF2 NM_017841.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.00600

Genes affected

SDHAF2 (HGNC:26034): (succinate dehydrogenase complex assembly factor 2) This gene encodes a mitochondrial assembly factor needed for the flavination of a succinate dehydrogenase complex subunit (SDHA), which is required for activity of the succinate dehydrogenase complex. Mutations in this gene are associated with paraganglioma. [provided by RefSeq, May 2022]

ENSG00000256591 (HGNC:):

ACMG classification

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=0.023432076).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SDHAF2	NM_017841.4	c.10T>G	p.Ser4Ala	missense_variant	1/4	ENST00000301761.7	NP_060311.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SDHAF2	ENST00000301761.7	c.10T>G	p.Ser4Ala	missense_variant	1/4	1	NM_017841.4	ENSP00000301761.3
ENSG00000256591	ENST00000541135.5	c.10T>G	p.Ser4Ala	missense_variant	1/5	4		ENSP00000443130.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

Alfa AF: 0.0000329 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Hereditary pheochromocytoma-paraganglioma Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jul 29, 2020

In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. This sequence change replaces serine with alanine at codon 4 of the SDHAF2 protein (p.Ser4Ala). The serine residue is weakly conserved and there is a moderate physicochemical difference between serine and alanine. This variant is not present in population databases (ExAC no frequency). This variant has not been reported in the literature in individuals with SDHAF2-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The alanine amino acid residue is found in multiple mammalian species, suggesting that this missense change does not adversely affect protein function. These predictions have not been confirmed by published functional studies and their clinical significance is uncertain. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.049
BayesDel_addAF	Benign	-0.18	T
BayesDel_noAF	Benign	-0.50
CADD	Benign	3.7
DANN	Benign	0.35
DEOGEN2	Benign	0.013	.;T;.;.;.;.
Eigen	Benign	-2.1
Eigen_PC	Benign	-2.0
FATHMM_MKL	Benign	0.0012	N
LIST_S2	Benign	0.12	T;T;T;T;T;T
M_CAP	Benign	0.049	D
MetaRNN	Benign	0.023	T;T;T;T;T;T
MetaSVM	Benign	-0.90	T
MutationAssessor	Benign	-1.6	.;N;.;.;.;.
PrimateAI	Benign	0.32	T
PROVEAN	Benign	-0.22	N;N;.;.;.;N
REVEL	Benign	0.12
Sift	Benign	0.98	T;T;.;.;.;T
Sift4G	Benign	0.77	T;T;.;T;T;T
Polyphen		0.0	.;B;.;.;.;.
Vest4		0.15, 0.062, 0.086, 0.14, 0.15
MVP		0.16
MPC		0.14
ClinPred		0.070	T
GERP RS		0.68
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.046
gMVP		0.27

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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

Other links and lift over

dbSNP: rs1205348193; hg19: chr11-61197628;