11-112094821-G-T

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 4P and 1B. PM1PM2BP4

The NM_003002.4(SDHD):c.331G>T(p.Val111Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000206 in 1,459,608 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V111I) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0000021 ( 0 hom. )

Consequence

SDHD
NM_003002.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.91

Publications

0 publications found

Variant links:

Genes affected

SDHD (HGNC:10683): (succinate dehydrogenase complex subunit D) This gene encodes a member of complex II of the respiratory chain, which is responsible for the oxidation of succinate. The encoded protein is one of two integral membrane proteins anchoring the complex to the matrix side of the mitochondrial inner membrane. Mutations in this gene are associated with the formation of tumors, including hereditary paraganglioma. Transmission of disease occurs almost exclusively through the paternal allele, suggesting that this locus may be maternally imprinted. There are pseudogenes for this gene on chromosomes 1, 2, 3, 7, and 18. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Feb 2013]

SDHD Gene-Disease associations (from GenCC):

hereditary pheochromocytoma-paraganglioma
Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet
pheochromocytoma
Inheritance: AD Classification: DEFINITIVE Submitted by: G2P
pheochromocytoma/paraganglioma syndrome 1
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), G2P
Carney-Stratakis syndrome
Inheritance: AD Classification: STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Genomics England PanelApp, Orphanet
mitochondrial complex II deficiency, nuclear type 1
Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
renal cell carcinoma
Inheritance: AD Classification: MODERATE Submitted by: Genomics England PanelApp
mitochondrial complex 2 deficiency, nuclear type 3
Inheritance: AR Classification: MODERATE Submitted by: Ambry Genetics
mitochondrial complex II deficiency
Inheritance: AR Classification: MODERATE, SUPPORTIVE Submitted by: Ambry Genetics, Orphanet
Cowden disease
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
intestinal cancer
Inheritance: AD Classification: LIMITED Submitted by: G2P
mitochondrial disease
Inheritance: AR Classification: LIMITED Submitted by: ClinGen

SDHD links:

ENSG00000255292 (HGNC:):

ENSG00000255292 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

PM1

In a hotspot region, there are 8 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 34 uncertain in NM_003002.4

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.36554497).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SDHD	NM_003002.4 link	c.331G>T	p.Val111Phe	missense_variant	Exon 4 of 4	ENST00000375549.8	NP_002993.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SDHD	ENST00000375549.8 link	c.331G>T	p.Val111Phe	missense_variant	Exon 4 of 4	1	NM_003002.4	ENSP00000364699.3
ENSG00000255292	ENST00000532699.1 link	n.314+5810G>T		intron_variant	Intron 3 of 5	3		ENSP00000456434.1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000206

AC:

AN:

1459608

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

726112

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33400

American (AMR)

AF:

0.00

AC:

AN:

44708

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26132

East Asian (EAS)

AF:

0.00

AC:

AN:

39696

South Asian (SAS)

AF:

0.0000116

AC:

AN:

86160

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53406

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4136

European-Non Finnish (NFE)

AF:

0.00000180

AC:

AN:

1111770

Other (OTH)

AF:

0.00

AC:

AN:

60200

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.492

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

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Hereditary cancer-predisposing syndrome

Uncertain:1

May 31, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The p.V111F variant (also known as c.331G>T), located in coding exon 4 of the SDHD gene, results from a G to T substitution at nucleotide position 331. The valine at codon 111 is replaced by phenylalanine, an amino acid with highly similar properties. This amino acid position is conserved. In addition, this alteration is predicted to be deleterious by in silico analysis. Based on the available evidence, the clinical significance of this variant remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.25

BayesDel_addAF

Pathogenic

0.31

BayesDel_noAF

Pathogenic

0.26

CADD

Benign

(source)

DANN

Uncertain

0.99

Eigen

Uncertain

0.31

Eigen_PC

Uncertain

0.30

FATHMM_MKL

Uncertain

0.80

LIST_S2

Benign

0.38

T;T

M_CAP

Pathogenic

0.35

MetaRNN

Benign

0.37

T;T

MetaSVM

Pathogenic

0.99

PhyloP100

1.9

PROVEAN

Benign

-1.2

N;N

REVEL

Uncertain

0.55

Sift

Uncertain

0.0030

D;D

Sift4G

Uncertain

0.011

D;D

Vest4

0.23

MutPred

0.66

Loss of stability (P = 0.0189);.;

MVP

0.78

ClinPred

0.84

GERP RS

2.8

Varity_R

0.23

Mutation Taster

=57/43

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over