chr1-17028723-A-G

Variant names:

• chr1-17028723-A-G
• rs11541235
• NM_003000.3:c.300T>C

Variant summary

Our verdict is Benign. Variant got -21 ACMG points: 0P and 21B. BP4_Strong BP6_Very_Strong BP7 BS1 BS2

The NM_003000.3(SDHB):​c.300T>C​(p.Ser100Ser) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00136 in 1,614,126 control chromosomes in the GnomAD database, including 8 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.0016 (1 hom., cov: 32)
  • Exomes 𝑓: 0.0013 (7 hom.)
• Consequence: SDHB NM_003000.3 synonymous
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts B:24
• Conservation: PhyloP100: -1.70

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]

ACMG classification

Verdict is Benign. Variant got -21 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.7).
• BP6: Variant 1-17028723-A-G is Benign according to our data. Variant chr1-17028723-A-G is described in ClinVar as [Likely_benign]. Clinvar id is 165179.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr1-17028723-A-G is described in Lovd as [Likely_benign]. Variant chr1-17028723-A-G is described in Lovd as [Benign].
• BP7: Synonymous conserved (PhyloP=-1.7 with no splicing effect.
• BS1: Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.00158 (240/152338) while in subpopulation NFE AF= 0.00178 (121/68034). AF 95% confidence interval is 0.00152. There are 1 homozygotes in gnomad4. There are 135 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.
• BS2: High Homozygotes in GnomAdExome4 at 7 Mitochondrial gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SDHB	NM_003000.3	c.300T>C	p.Ser100Ser	synonymous_variant	Exon 4 of 8	ENST00000375499.8	NP_002991.2
SDHB	NM_001407361.1	c.300T>C	p.Ser100Ser	synonymous_variant	Exon 4 of 8		NP_001394290.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SDHB	ENST00000375499.8	c.300T>C	p.Ser100Ser	synonymous_variant	Exon 4 of 8	1	NM_003000.3	ENSP00000364649.3

Frequencies

GnomAD3 genomes AF: 0.00157 AC: 239 AN: 152220 Hom.: 1 Cov.: 32

Gnomad AFR AF: 0.000121

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000524

Gnomad ASJ AF: 0.0170

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00145

Gnomad FIN AF: 0.00320

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00178

Gnomad OTH AF: 0.00239

GnomAD3 exomes AF: 0.00175 AC: 439 AN: 251410 Hom.: 3 AF XY: 0.00170 AC XY: 231 AN XY: 135884

Gnomad AFR exome AF: 0.0000615

Gnomad AMR exome AF: 0.000405

Gnomad ASJ exome AF: 0.0157

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.000653

Gnomad FIN exome AF: 0.00162

Gnomad NFE exome AF: 0.00173

Gnomad OTH exome AF: 0.00228

GnomAD4 exome AF: 0.00134 AC: 1959 AN: 1461788 Hom.: 7 Cov.: 32 AF XY: 0.00140 AC XY: 1019 AN XY: 727194

Gnomad4 AFR exome AF: 0.0000597

Gnomad4 AMR exome AF: 0.000470

Gnomad4 ASJ exome AF: 0.0148

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.000614

Gnomad4 FIN exome AF: 0.00120

Gnomad4 NFE exome AF: 0.00117

Gnomad4 OTH exome AF: 0.00204

GnomAD4 genome AF: 0.00158 AC: 240 AN: 152338 Hom.: 1 Cov.: 32 AF XY: 0.00181 AC XY: 135 AN XY: 74492

Gnomad4 AFR AF: 0.000120

Gnomad4 AMR AF: 0.000523

Gnomad4 ASJ AF: 0.0170

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00166

Gnomad4 FIN AF: 0.00320

Gnomad4 NFE AF: 0.00178

Gnomad4 OTH AF: 0.00237

Alfa AF: 0.00268 Hom.: 1

Bravo AF: 0.00144

Asia WGS AF: 0.000577 AC: 2 AN: 3478

EpiCase AF: 0.00218

EpiControl AF: 0.00160

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:24

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Benign:8

-

Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

-

Laboratory of Diagnostic Genome Analysis, Leiden University Medical Center (LUMC)

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

-

Genome Diagnostics Laboratory, Amsterdam University Medical Center

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

-

Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Mar 01, 2025

CeGaT Center for Human Genetics Tuebingen

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

SDHB: BP4, BP7 -

May 16, 2018

GeneDx

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is associated with the following publications: (PMID: 27279923, 17848412, 19768395, 19215943, 16912137, 28748451) -

Nov 13, 2023

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

-

Breakthrough Genomics, Breakthrough Genomics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: not provided

- -

not specified Benign:6

-

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

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Mar 04, 2025

Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Aug 01, 2013

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Ser100Ser in exon 4 of SDHB: This variant is not expected to have clinical signi ficance because it has been identified in 0.4% (31/8600) of European American ch romosomes by the NHLBI Exome Sequencing Project (http://evs.gs.washington.edu/EV S/; dbSNP rs11541235). -

-

Genome Diagnostics Laboratory, University Medical Center Utrecht

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Dec 26, 2022

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

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Mar 28, 2019

Genetic Services Laboratory, University of Chicago

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Hereditary pheochromocytoma-paraganglioma Benign:3

Jan 24, 2025

Department of Clinical Genetics, Copenhagen University Hospital, Rigshospitalet

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The following ACMG criteria have been used in classification: BA1; BP4; BP7 -

Sep 20, 2022

Color Diagnostics, LLC DBA Color Health

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jan 28, 2019

Illumina Laboratory Services, Illumina

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). Publications were found based on this search. The evidence from the literature, in combination with allele frequency data from public databases where available, was sufficient to determine this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. -

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

- -

Paragangliomas 4 Benign:1

Jul 07, 2023

KCCC/NGS Laboratory, Kuwait Cancer Control Center

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Gastrointestinal stromal tumor Benign:1

Jul 21, 2021

Department of Pathology and Laboratory Medicine, Sinai Health System

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Hereditary cancer-predisposing syndrome Benign:1

Sep 04, 2014

Ambry Genetics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This alteration is classified as likely 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. -

SDHB-related disorder Benign:1

Apr 17, 2019

PreventionGenetics, part of Exact Sciences

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

This variant is classified as benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Pheochromocytoma;C0238198:Gastrointestinal stromal tumor;C1847319:Carney-Stratakis syndrome;C1861848:Paragangliomas 4;C5543176:Mitochondrial complex 2 deficiency, nuclear type 4 Benign:1

May 24, 2022

Fulgent Genetics, Fulgent Genetics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Carney-Stratakis syndrome Benign:1

Jan 28, 2019

Illumina Laboratory Services, Illumina

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). Publications were found based on this search. The evidence from the literature, in combination with allele frequency data from public databases where available, was sufficient to determine this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.70
CADD	Benign	3.9
DANN	Benign	0.68

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

LitVar

Other links and lift over

dbSNP: rs11541235; hg19: chr1-17355218;