Genetic Variant SDHAF2:p.Val3Leu (chr11-61430153-G-T) – ACMG Classification: Benign (-13 pts)

Variant summary

Our verdict is Benign. The variant received -13 ACMG points: 0P and 13B. BP4_StrongBP6BS1BS2

The NM_017841.4(SDHAF2):c.7G>T(p.Val3Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000115 in 1,614,106 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V3A) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00011 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00012 ( 0 hom. )

Consequence

SDHAF2
NM_017841.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:7B:4

Conservation

PhyloP100: 0.812

Publications

3 publications found

Variant links:

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]

SDHAF2 links:

ENSG00000256591 (HGNC:):

ENSG00000256591 links:

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]

CPSF7 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -13 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.05037597).

BP6

Variant 11-61430153-G-T is Benign according to our data. Variant chr11-61430153-G-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 411607.

BS1

Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.000112 (17/152264) while in subpopulation NFE AF = 0.00022 (15/68034). AF 95% confidence interval is 0.000135. There are 0 homozygotes in GnomAd4. There are 9 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.

BS2

High AC in GnomAd4 at 17 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_017841.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
SDHAF2	NM_017841.4	MANE Select	c.7G>T	p.Val3Leu	missense	Exon 1 of 4	NP_060311.1	Q9NX18
CPSF7	NM_001142565.3	MANE Select	c.-295C>A		upstream_gene	N/A	NP_001136037.1	Q8N684-2
CPSF7	NM_024811.4		c.-323C>A		upstream_gene	N/A	NP_079087.3

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
SDHAF2	ENST00000301761.7	TSL:1 MANE Select	c.7G>T	p.Val3Leu	missense	Exon 1 of 4	ENSP00000301761.3	Q9NX18
ENSG00000256591	ENST00000541135.5	TSL:4	c.7G>T	p.Val3Leu	missense	Exon 1 of 5	ENSP00000443130.1	F5H5T6
SDHAF2	ENST00000713964.1		c.-88G>T		5_prime_UTR_premature_start_codon_gain	Exon 1 of 4	ENSP00000519257.1	A0AAQ5BH68

Frequencies

GnomAD3 genomes

AF:

0.000112

AC:

AN:

152264

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.0000941

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000220

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000104

AC:

AN:

250714

AF XY:

0.000103

show subpopulations

Gnomad AFR exome

AF:

0.0000618

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000924

Gnomad NFE exome

AF:

0.000177

Gnomad OTH exome

AF:

0.000491

GnomAD4 exome

AF:

0.000116

AC:

169

AN:

1461842

Hom.:

Cov.:

AF XY:

0.000116

AC XY:

AN XY:

727218

show subpopulations

African (AFR)

AF:

0.0000299

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44722

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26130

East Asian (EAS)

AF:

0.0000252

AC:

AN:

39696

South Asian (SAS)

AF:

0.00

AC:

AN:

86248

European-Finnish (FIN)

AF:

0.000150

AC:

AN:

53418

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.000139

AC:

155

AN:

1111988

Other (OTH)

AF:

0.0000662

AC:

AN:

60392

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.474

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000112

AC:

AN:

152264

Hom.:

Cov.:

AF XY:

0.000121

AC XY:

AN XY:

74396

show subpopulations

African (AFR)

AF:

0.0000241

AC:

AN:

41480

American (AMR)

AF:

0.00

AC:

AN:

15292

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5200

South Asian (SAS)

AF:

0.00

AC:

AN:

4836

European-Finnish (FIN)

AF:

0.0000941

AC:

AN:

10632

Middle Eastern (MID)

AF:

0.00

AC:

AN:

314

European-Non Finnish (NFE)

AF:

0.000220

AC:

AN:

68034

Other (OTH)

AF:

0.00

AC:

AN:

2094

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.510

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000143

Hom.:

Bravo

AF:

0.0000756

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.000132

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.000178

ClinVar

ClinVar submissions

Significance:Conflicting classifications of pathogenicity

Revision:criteria provided, conflicting classifications

View on ClinVar

Pathogenic

VUS

Benign

Condition

Hereditary cancer-predisposing syndrome (3)

Hereditary pheochromocytoma-paraganglioma (3)

not provided (2)

Pheochromocytoma/paraganglioma syndrome 2 (2)

SDHAF2-related disorder (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.11

BayesDel_addAF

Benign

-0.34

BayesDel_noAF

Benign

-0.40

CADD

Benign

6.6

(source)

DANN

Benign

0.97

DEOGEN2

Benign

0.019

Eigen

Benign

-1.0

Eigen_PC

Benign

-1.0

FATHMM_MKL

Benign

0.20

LIST_S2

Benign

0.56

M_CAP

Benign

0.040

MetaRNN

Benign

0.050

MetaSVM

Benign

-0.89

MutationAssessor

Uncertain

2.0

PhyloP100

0.81

PrimateAI

Benign

0.35

PROVEAN

Benign

0.070

REVEL

Benign

0.15

Sift

Uncertain

0.014

Sift4G

Benign

0.20

Polyphen

0.0

Vest4

0.16

MutPred

0.15

Loss of catalytic residue at V3 (P = 0.01)

MVP

0.23

MPC

0.17

ClinPred

0.11

GERP RS

2.8

PromoterAI

-0.063

Neutral

(source)

Varity_R

0.052

gMVP

0.31

Mutation Taster

=94/6

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.080

Details are displayed if max score is > 0.2

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over