11-61430149-G-C

Variant names:

• chr11-61430149-G-C
• NM_017841.4:c.3G>C

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PVS1_Supporting PM2

The NM_017841.4(SDHAF2):​c.3G>C​(p.Met1?) variant causes a start lost change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: SDHAF2 NM_017841.4 start_lost
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.17

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:):

CPSF7 (HGNC:30098): (cleavage and polyadenylation specific factor 7) Cleavage factor Im (CFIm) is one of six factors necessary for correct cleavage and polyadenylation of pre-mRNAs. CFIm is composed of three different subunits of 25, 59, and 68 kDa, and it functions as a heterotetramer, with a dimer of the 25 kDa subunit binding to two of the 59 or 68 kDa subunits. The protein encoded by this gene represents the 59 kDa subunit, which can interact with the splicing factor U2 snRNP Auxiliary Factor (U2AF) 65 to link the splicing and polyadenylation complexes. [provided by RefSeq, Oct 2016]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PVS1: Start lost variant, no pathogenic variants between lost start and next in-frame start position. Next in-frame start position is after 13 codons. Genomic position: 61437625. Lost 0.074 part of the original CDS.
• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SDHAF2	NM_017841.4	c.3G>C	p.Met1?	start_lost	Exon 1 of 4	ENST00000301761.7	NP_060311.1
CPSF7	NM_001142565.3	c.-291C>G		upstream_gene_variant		ENST00000439958.8	NP_001136037.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SDHAF2	ENST00000301761.7	c.3G>C	p.Met1?	start_lost	Exon 1 of 4	1	NM_017841.4	ENSP00000301761.3
ENSG00000256591	ENST00000541135.5	c.3G>C	p.Met1?	start_lost	Exon 1 of 5	4		ENSP00000443130.1
CPSF7	ENST00000439958.8	c.-291C>G		upstream_gene_variant		1	NM_001142565.3	ENSP00000397203.3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

May 01, 2024

Quest Diagnostics Nichols Institute San Juan Capistrano

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The SDHAF2 c.3G>C variant disrupts the translation initiation codon of the SDHAF2 mRNA and is predicted to interfere with SDHAF2 protein synthesis. This variant has not been reported in individuals with SDHAF2-related conditions in the published literature. This variant has not been reported in large, multi-ethnic general populations (Genome Aggregation Database, http://gnomad.broadinstitute.org). Based on the available information, we are unable to determine the clinical significance of this variant. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Pathogenic	0.30
CADD	Benign	22
DANN	Uncertain	0.98
DEOGEN2	Benign	0.019	.;T;.;.;.;.
Eigen	Uncertain	0.39
Eigen_PC	Uncertain	0.35
FATHMM_MKL	Uncertain	0.89	D
LIST_S2	Uncertain	0.90	D;D;D;D;D;D
M_CAP	Pathogenic	0.75	D
MetaRNN	Pathogenic	0.99	D;D;D;D;D;D
MetaSVM	Benign	-0.32	T
PROVEAN	Benign	-0.41	N;N;.;.;.;N
REVEL	Uncertain	0.48
Sift	Pathogenic	0.0	D;D;.;.;.;D
Sift4G	Benign	0.099	T;T;.;T;T;T
Polyphen		0.85	.;P;.;.;.;.
Vest4		0.90, 0.93, 0.91, 0.91, 0.86
MutPred		0.97		Gain of catalytic residue at M1 (P = 0.024);Gain of catalytic residue at M1 (P = 0.024);Gain of catalytic residue at M1 (P = 0.024);Gain of catalytic residue at M1 (P = 0.024);Gain of catalytic residue at M1 (P = 0.024);Gain of catalytic residue at M1 (P = 0.024);
MVP		0.62
ClinPred		1.0	D
GERP RS		4.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.96
gMVP		0.41

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.040		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: chr11-61197621;