rs74315370

Variant names:

Your query was ambiguous. Multiple possible variants found:

Variant summary

Our verdict is Pathogenic. The variant received 16 ACMG points: 16P and 0B. PVS1PP5_Very_Strong

The NM_003000.3(SDHB):c.136C>T(p.Arg46*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000105 in 1,613,622 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★★). Synonymous variant affecting the same amino acid position (i.e. R46R) has been classified as Likely benign. Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000089 ( 0 hom. )

Consequence

SDHB
NM_003000.3 stop_gained

Scores

Clinical Significance

Pathogenic criteria provided, multiple submitters, no conflicts P:12U:1

Conservation

PhyloP100: 1.56

Publications

55 publications found

Variant links:

Genes affected

SDHB (HGNC:10681): (succinate dehydrogenase complex iron sulfur subunit B) This tumor suppressor gene encodes the iron-sulfur protein subunit of the succinate dehydrogenase (SDH) enzyme complex which plays a critical role in mitochondria. The SDH enzyme complex is composed of four nuclear-encoded subunits. This enzyme complex converts succinate to fumarate which releases electrons as part of the citric acid cycle, and the enzyme complex additionally provides an attachment site for released electrons to be transferred to the oxidative phosphorylation pathway. The SDH enzyme complex plays a role in oxygen-related gene regulation through its conversion of succinate, which is an oxygen sensor that stabilizes the hypoxia-inducible factor 1 (HIF1) transcription factor. Sporadic and familial mutations in this gene result in paragangliomas, pheochromocytoma, and gastrointestinal stromal tumors, supporting a link between mitochondrial dysfunction and tumorigenesis. Mutations in this gene are also implicated in nuclear type 4 mitochondrial complex II deficiency. [provided by RefSeq, Jun 2022]

SDHB Gene-Disease associations (from GenCC):

Carney-Stratakis syndrome
Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Genomics England PanelApp, G2P, Orphanet
gastrointestinal stromal tumor
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Genomics England PanelApp, G2P, Labcorp Genetics (formerly Invitae)
hereditary pheochromocytoma-paraganglioma
Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet
pheochromocytoma
Inheritance: AD Classification: DEFINITIVE Submitted by: G2P
pheochromocytoma/paraganglioma syndrome 4
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Genomics England PanelApp, Ambry Genetics, Labcorp Genetics (formerly Invitae)
mitochondrial disease
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
renal cell carcinoma
Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp
mitochondrial complex 2 deficiency, nuclear type 4
Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
Cowden disease
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
mitochondrial complex II deficiency
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

SDHB links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 16 ACMG points.

PVS1

Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.

PP5

Variant 1-17044825-G-A is Pathogenic according to our data. Variant chr1-17044825-G-A is described in ClinVar as Pathogenic. ClinVar VariationId is 142763.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SDHB	NM_003000.3 link	c.136C>T	p.Arg46*	stop_gained	Exon 2 of 8	ENST00000375499.8	NP_002991.2
SDHB	NM_001407361.1 link	c.136C>T	p.Arg46*	stop_gained	Exon 2 of 8		NP_001394290.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SDHB	ENST00000375499.8 link	c.136C>T	p.Arg46*	stop_gained	Exon 2 of 8	1	NM_003000.3	ENSP00000364649.3

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152150

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

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:

0.000189

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000159

AC:

AN:

251342

AF XY:

0.0000221

show subpopulations

Gnomad AFR exome

AF:

0.0000615

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000926

Gnomad NFE exome

AF:

0.00000880

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000890

AC:

AN:

1461472

Hom.:

Cov.:

AF XY:

0.0000110

AC XY:

AN XY:

727056

show subpopulations

African (AFR)

AF:

0.0000299

AC:

AN:

33472

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26128

East Asian (EAS)

AF:

0.00

AC:

AN:

39696

South Asian (SAS)

AF:

0.00

AC:

AN:

86254

European-Finnish (FIN)

AF:

0.0000375

AC:

AN:

53388

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.00000900

AC:

AN:

1111662

Other (OTH)

AF:

0.00

AC:

AN:

60382

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.467

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:

0.0000263

AC:

AN:

152150

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74318

show subpopulations

African (AFR)

AF:

0.0000483

AC:

AN:

41414

American (AMR)

AF:

0.00

AC:

AN:

15272

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5202

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.000189

AC:

AN:

10602

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68046

Other (OTH)

AF:

0.00

AC:

AN:

2088

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

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:

0.00

Hom.:

Bravo

AF:

0.00000756

ExAC

AF:

0.0000165

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:12Uncertain:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Hereditary pheochromocytoma-paraganglioma

Pathogenic:4

Aug 19, 2024

All of Us Research Program, National Institutes of Health

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.136C>T (p.Arg46*) variant in the SDHB gene is located on the exon 2 and introduces a premature translation termination codon, resulting in an absent or disrupted protein product. The variant has been reported in multiple unrelated individuals with paraganglioma/pheochromocytoma/renal cell carcinoma (PMID: 33362715, 35127314, 36597280, 29623478, 21348866, 18728283, 16405730). The alternative frameshift and stop-gain variants located in the same exon (p.Pro56fs, p.Gln30fs) have been reported in individuals with paraganglioma/pheochromocytoma and reviewed as pathogenic (ClinVar ID: 185342, 186518). Loss-of-function variants of SDHB are known to be pathogenic (PMID: 16258955, 19389109, 28490599). The variant is reported in ClinVar (ID: 142763). The variant is rare in general population according to gnomAD (5/282738). Therefore, the c.136C>T (p.Arg46*) variant in the SDHB gene has been classified as pathogenic. -

Section on Medical Neuroendocrinolgy, National Institutes of Health

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:research

- -

Oct 29, 2024

Color Diagnostics, LLC DBA Color Health

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant changes 1 nucleotide in exon 2 of the SDHB gene, creating a premature translation stop signal. This variant is expected to result in an absent or non-functional protein product. This variant has been reported in individuals affected with pheochromocytoma/paraganglioma (PMID: 19075037, 19454582, 21348866, 21909610, 23797725, 27539324, 28944243, 30122763). This variant has been identified in 5/282738 chromosomes in the general population by the Genome Aggregation Database (gnomAD). Loss of SDHB function is a known mechanism of disease (clinicalgenome.org). Based on the available evidence, this variant is classified as Pathogenic. -

Aug 10, 2020

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The p.Arg46X variant in SDHB has been reported in 11 individuals with SDHB-associated tumors and segregated with disease in 5 affected individuals from 3 families (Ricketts 2008 PMID:18728283, Srirangalingam 2008 PMID:18419787, Ghayee 2009 PMID:19075037, Hensen 2012 PMID:21348866, Mason 2013 PMID:23797725, Pandit 2016 PMID:27539324, Richter 2019 PMID:30050099). It has also been identified in 0.014% (1/7218) of "Other" or 0.008% of Finnish (2/25082) chromosomes by gnomAD (http://gnomad.broadinstitute.org). This variant has also been reported in ClinVar (Variation ID 142763). This nonsense variant leads to a premature termination codon at position 46, which is predicted to lead to a truncated or absent protein. Heterozygous loss of function of the SDHB gene is an established disease mechanism in autosomal dominant hereditary paraganglioma and pheochromocytoma. In summary, this variant meets criteria to be classified as pathogenic for autosomal dominant hereditary paraganglioma and pheochromocytoma. ACMG/AMP Criteria applied: PVS1, PS4_Moderate, PM2_Supporting, PP1_Moderate -

not provided

Pathogenic:2Uncertain:1

Sep 16, 2018

Gharavi Laboratory, Columbia University

Significance:Uncertain significance

Review Status:no assertion criteria provided

Collection Method:research

- -

Apr 13, 2024

Quest Diagnostics Nichols Institute San Juan Capistrano

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The SDHB c.136C>T (p.Arg46*) variant causes the premature termination of SDHB protein synthesis. This variant has been reported in the published literature in multiple individuals affected with paraganglioma-pheochromocytoma (PGL/PCC) (PMID: 12618761 (2003), 16317055 (2006), 16405730 (2006), 16912137 (2006), 18419787 (2008), 19454582 (2009), 21348866 (2012), 21909610 (2011), 23797725 (2013), 28944243 (2017), 33362715 (2020)), and renal cell carcinoma (PMID: 18728283 (2008)). The frequency of this variant in the general population, 0.000018 (5/282738 chromosomes (Genome Aggregation Database, http://gnomad.broadinstitute.org)), is consistent with pathogenicity. Based on the available information, this variant is classified as pathogenic. -

Oct 22, 2021

GeneDx

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Nonsense variant predicted to result in protein truncation or nonsense mediated decay in a gene for which loss-of-function is a known mechanism of disease; Not observed at significant frequency in large population cohorts (Lek et al., 2016); This variant is associated with the following publications: (PMID: 20418362, 21348866, 27539324, 12618761, 18728283, 23797725, 16405730, 19075037, 18419787, 16912137, 18840642, 19454582, 16317055, 22517557, 17102084, 26916530, 28374168, 28204537, 28152038, 30050099, 30122763, 31851316, 29623478, 30694796, 32082649, 30871634, 31492822, 29625052, 32741965, 33087929, 30787465) -

Pheochromocytoma/paraganglioma syndrome 4

Pathogenic:2

Nov 01, 2016

Center for Human Genetics, Inc, Center for Human Genetics, Inc

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Feb 08, 2024

Myriad Genetics, Inc.

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant is considered pathogenic. This variant creates a termination codon and is predicted to result in premature protein truncation. -

Pheochromocytoma;C0238198:Gastrointestinal stromal tumor;C1861848:Pheochromocytoma/paraganglioma syndrome 4

Pathogenic:1

Jan 29, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change creates a premature translational stop signal (p.Arg46*) in the SDHB gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in SDHB are known to be pathogenic (PMID: 19454582, 19802898). This variant is present in population databases (rs74315370, gnomAD 0.01%). This premature translational stop signal has been observed in individual(s) with pheochromocytoma, paraganglioma, and renal cell carcinoma (PMID: 12618761, 16405730, 18728283, 21348866, 23797725). It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 142763). For these reasons, this variant has been classified as Pathogenic. -

Gastrointestinal stromal tumor

Pathogenic:1

Dec 27, 2023

Baylor Genetics

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Hereditary cancer-predisposing syndrome

Pathogenic:1

Feb 03, 2025

Ambry Genetics

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The p.R46* pathogenic mutation (also known as c.136C>T), located in coding exon 2 of the SDHB gene, results from a C to T substitution at nucleotide position 136. This changes the amino acid from an arginine to a stop codon within coding exon 2. This mutation has been reported multiple times as a disease-causing mutation in patients with PGL-PCC or renal cell carcinoma (Benn DE et al. Oncogene. 2003 Mar;22:1358-64; Bayley JP et al. BMC Med. Genet. 2006 Jan;7:1; Benn DE et al. J. Clin. Endocrinol. Metab. 2006 Mar;91:827-36; Brouwers FM et al. J. Clin. Endocrinol. Metab. 2006 Nov;91:4505-9; Ricketts C et al. J. Natl. Cancer Inst. 2008 Sep;100:1260-2; Srirangalingam U et al. Clin. Endocrinol. 2008 Oct;69:587-96; Ghayee HK et al. Endocr. Relat. Cancer. 2009 Mar;16:291-9; Mason EF et al. Am. J. Surg. Pathol. 2013 Oct;37:1612-8; Pandit R et al. Eur. J. Endocrinol. 2016 Oct;175(4):311-23; Chew WHW et al. Mol Genet Genomic Med. 2017 Sep;5(5):602-607). In addition to the clinical data presented in the literature, this alteration is expected to result in loss of function by premature protein truncation or nonsense-mediated mRNA decay. As such, this alteration is interpreted as a disease-causing mutation. -

SDHB-related disorder

Pathogenic:1

Mar 28, 2024

Greenwood Genetic Center Diagnostic Laboratories, Greenwood Genetic Center

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

PVS1, PS4 -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.50

BayesDel_noAF

Pathogenic

0.58

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

Eigen

Uncertain

0.60

Eigen_PC

Uncertain

0.44

FATHMM_MKL

Uncertain

0.85

PhyloP100

1.6

Vest4

0.92

GERP RS

2.4

PromoterAI

-0.065

Neutral

(source)

Mutation Taster

=2/198

disease causing (ClinVar)

(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

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over