chr1-17027802-A-G

Variant names:

Variant summary

Our verdict is Benign. The variant received -11 ACMG points: 2P and 13B. PM1BP4_StrongBP6BS1BS2

The NM_003000.3(SDHB):c.487T>C(p.Ser163Pro) variant causes a missense change. The variant allele was found at a frequency of 0.0131 in 1,613,448 control chromosomes in the GnomAD database, including 207 homozygotes. In-silico tool predicts 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. S163F) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0095 ( 14 hom., cov: 32)

Exomes 𝑓: 0.013 ( 193 hom. )

Consequence

SDHB
NM_003000.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:4B:26O:1

Conservation

PhyloP100: 4.71

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 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -11 ACMG points.

PM1

In a region_of_interest Interaction with SDHAF1 (size 72) in uniprot entity SDHB_HUMAN there are 67 pathogenic changes around while only 2 benign (97%) in NM_003000.3

BP4

Computational evidence support a benign effect (MetaRNN=0.008068502).

BP6

Variant 1-17027802-A-G is Benign according to our data. Variant chr1-17027802-A-G is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 12792.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=3, not_provided=1, Likely_benign=1, Benign=19}. Variant chr1-17027802-A-G is described in Lovd as [Benign].

BS1

Variant frequency is greater than expected in population sas. GnomAd4 allele frequency = 0.00947 (1441/152204) while in subpopulation SAS AF = 0.0193 (93/4824). AF 95% confidence interval is 0.0161. There are 14 homozygotes in GnomAd4. There are 717 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position FAILED quality control check.

BS2

High Homozygotes in GnomAd4 at 14 Mitochondrial gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SDHB	NM_003000.3 link	c.487T>C	p.Ser163Pro	missense_variant	Exon 5 of 8	ENST00000375499.8	NP_002991.2	P21912
SDHB	NM_001407361.1 link	c.433T>C	p.Ser145Pro	missense_variant	Exon 5 of 8		NP_001394290.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SDHB	ENST00000375499.8 link	c.487T>C	p.Ser163Pro	missense_variant	Exon 5 of 8	1	NM_003000.3	ENSP00000364649.3		P21912

Frequencies

GnomAD3 genomes

AF:

0.00947

AC:

1441

AN:

152086

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00179

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00465

Gnomad ASJ

AF:

0.00749

Gnomad EAS

AF:

0.000193

Gnomad SAS

AF:

0.0191

Gnomad FIN

AF:

0.0185

Gnomad MID

AF:

0.00633

Gnomad NFE

AF:

0.0141

Gnomad OTH

AF:

0.00909

GnomAD2 exomes

AF:

0.0121

AC:

3045

AN:

251388

AF XY:

0.0130

show subpopulations

Gnomad AFR exome

AF:

0.00178

Gnomad AMR exome

AF:

0.00393

Gnomad ASJ exome

AF:

0.00655

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0216

Gnomad NFE exome

AF:

0.0152

Gnomad OTH exome

AF:

0.0114

GnomAD4 exome

AF:

0.0135

AC:

19718

AN:

1461244

Hom.:

193

Cov.:

AF XY:

0.0137

AC XY:

9927

AN XY:

726966

show subpopulations

Gnomad4 AFR exome

AF:

0.00215

AC:

AN:

33474

Gnomad4 AMR exome

AF:

0.00362

AC:

162

AN:

44718

Gnomad4 ASJ exome

AF:

0.00612

AC:

160

AN:

26126

Gnomad4 EAS exome

AF:

0.0000252

AC:

AN:

39692

Gnomad4 SAS exome

AF:

0.0174

AC:

1505

AN:

86248

Gnomad4 FIN exome

AF:

0.0215

AC:

1149

AN:

53366

Gnomad4 NFE exome

AF:

0.0143

AC:

15925

AN:

1111470

Gnomad4 Remaining exome

AF:

0.0111

AC:

673

AN:

60382

Heterozygous variant carriers

932

1865

2797

3730

4662

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Exome Het

Exome Hom

Variant carriers

592

1184

1776

2368

2960

<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:

0.00947

AC:

1441

AN:

152204

Hom.:

Cov.:

AF XY:

0.00963

AC XY:

717

AN XY:

74424

show subpopulations

Gnomad4 AFR

AF:

0.00178

AC:

0.0017809

AN:

0.0017809

Gnomad4 AMR

AF:

0.00465

AC:

0.00464781

AN:

0.00464781

Gnomad4 ASJ

AF:

0.00749

AC:

0.0074928

AN:

0.0074928

Gnomad4 EAS

AF:

0.000193

AC:

0.000193274

AN:

0.000193274

Gnomad4 SAS

AF:

0.0193

AC:

0.0192786

AN:

0.0192786

Gnomad4 FIN

AF:

0.0185

AC:

0.018501

AN:

0.018501

Gnomad4 NFE

AF:

0.0141

AC:

0.0141181

AN:

0.0141181

Gnomad4 OTH

AF:

0.00852

AC:

0.00852273

AN:

0.00852273

Heterozygous variant carriers

156

233

311

389

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Genome Het

Genome Hom

Variant carriers

110

<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:

0.0121

Hom.:

Bravo

AF:

0.00751

TwinsUK

AF:

0.0183

AC:

ALSPAC

AF:

0.0125

AC:

ESP6500AA

AF:

0.00272

AC:

ESP6500EA

AF:

0.0130

AC:

112

ExAC

AF:

0.0125

AC:

1523

Asia WGS

AF:

0.00866

AC:

AN:

3478

EpiCase

AF:

0.0136

EpiControl

AF:

0.0149

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:4Benign:26Other:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not specified

Benign:10Other:1

Mar 04, 2025

Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Genome Diagnostics Laboratory, Amsterdam University Medical Center

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

May 08, 2017

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Variant summary: The SDHB c.487T>C (p.Ser163Pro) variant involves the alteration of a conserved nucleotide. 2/4 in silico tools predict a benign outcome for this variant (SNPsandGO not captured due to low reliability index). This variant was found in 1523/121404 control chromosomes (21 homozygotes) at a frequency of 0.0125449, which largely exceeds the estimated maximal expected allele frequency of a pathogenic SDHB variant (0.0000009), suggesting this variant is likely a benign polymorphism. In addition, multiple clinical diagnostic laboratories/reputable databases classified this variant as benign. Taken together, this variant is classified as benign. -

Nov 16, 2016

Eurofins Ntd Llc (ga)

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Apr 03, 2018

Genetic Services Laboratory, University of Chicago

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Clinical Genetics, Academic Medical Center

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

PreventionGenetics, part of Exact Sciences

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Sep 19, 2013

ITMI

Significance:not provided

Review Status:no classification provided

Collection Method:reference population

- -

Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Sep 23, 2024

Athena Diagnostics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Paragangliomas 4

Uncertain:2Benign:3

Apr 24, 2023

Myriad Genetics, Inc.

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant is considered benign. This variant has been observed at a population frequency that is significantly greater than expected given the associated disease prevalence and penetrance. -

Mar 23, 2016

Counsyl

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

This submission and the accompanying classification are no longer maintained by the submitter. For more information on current observations and classification, please contact variantquestions@myriad.com. -

Nov 01, 2016

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

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Feb 13, 2015

Genomic Diagnostic Laboratory, Division of Genomic Diagnostics, Children's Hospital of Philadelphia

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Nov 21, 2018

Equipe Genetique des Anomalies du Developpement, Université de Bourgogne

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Uncertain:1Benign:4

Jun 01, 2025

CeGaT Center for Human Genetics Tuebingen

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

SDHB: BS1, BS2 -

Oct 08, 2024

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Jul 13, 2012

Biesecker Lab/Clinical Genomics Section, National Institutes of Health

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:research

- -

Nov 03, 2021

Institute for Clinical Genetics, University Hospital TU Dresden, University Hospital TU Dresden

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Apr 10, 2018

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant is associated with the following publications: (PMID: 19215943, 16322339, 17298551, 16912137, 22995991, 19768395, 22584711, 19802898, 19399650, 22293219, 24735130, 20981092, 27153395, 18678321, 21979946, 25376524, 22938532, 22703879, 25694510, 23666964, 25333069, 24728327, 26071763, 17102082, 17102083, 22270996, 25695889, 17639058, 14985401, 26182300, 18419787, 19153209, 19522823, 19454582, 27279923, 27884173, 26092435, 28374168, 29386252, 30050099, 31019283) -

Gastrointestinal stromal tumor

Benign:2

Jun 22, 2021

Department of Pathology and Laboratory Medicine, Sinai Health System

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

May 28, 2019

Mendelics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Hereditary cancer-predisposing syndrome

Benign:2

Sep 11, 2020

Sema4, Sema4

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:curation

- -

Dec 23, 2014

Ambry Genetics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Hereditary pheochromocytoma-paraganglioma

Benign:2

Jun 09, 2022

Color Diagnostics, LLC DBA Color Health

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Mar 06, 2018

Illumina Laboratory Services, Illumina

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Cowden syndrome

Uncertain:1

Aug 01, 2008

OMIM

Significance:Uncertain significance

Review Status:no assertion criteria provided

Collection Method:literature only

- -

Pheochromocytoma;C0238198:Gastrointestinal stromal tumor;C1861848:Paragangliomas 4

Benign:1

Feb 04, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Malignant tumor of breast

Benign:1

Center of Medical Genetics and Primary Health Care

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Carney-Stratakis syndrome

Benign:1

Mar 06, 2018

Illumina Laboratory Services, Illumina

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.14

BayesDel_addAF

Benign

-0.085

BayesDel_noAF

Uncertain

0.12

CADD

Benign

DANN

Benign

0.86

DEOGEN2

Benign

0.24

T;.;T

Eigen

Benign

-0.23

Eigen_PC

Benign

0.029

FATHMM_MKL

Uncertain

0.93

LIST_S2

Benign

0.81

T;T;T

MetaRNN

Benign

0.0081

T;T;T

MetaSVM

Uncertain

0.12

MutationAssessor

Benign

0.47

N;.;.

PrimateAI

Uncertain

0.51

PROVEAN

Benign

0.44

N;.;.

REVEL

Uncertain

0.44

Sift

Benign

0.77

T;.;.

Sift4G

Benign

1.0

T;T;T

Polyphen

0.0

B;.;.

Vest4

0.12

MPC

0.21

ClinPred

0.025

GERP RS

5.9

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.19

gMVP

0.76

Mutation Taster

=44/56

disease causing

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over