rs104894309

Variant names:

• chr11-112086940-C-A
• rs104894309
• NM_003002.4:c.33C>A

Your query was ambiguous. Multiple possible variants found:

• chr11-112086940-C-A
• chr11-112086940-C-T

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1 PM2 PP5_Very_Strong

The NM_003002.4(SDHD):​c.33C>A​(p.Cys11*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 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. C11C) has been classified as Benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: SDHD NM_003002.4 stop_gained
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:7
• Conservation: PhyloP100: 0.586

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]

ENSG00000255292 (HGNC:):

TIMM8B (HGNC:11818): (translocase of inner mitochondrial membrane 8 homolog B) This gene encodes a member of a well-conserved family of proteins with similarity to yeast Tim mitochondrial import proteins. This gene is encoded by a nuclear gene and is transported into the intermembrane space of the mitochondrion. When formed into complexes, these proteins guide membrane-spanning proteins across the mitochondrial intermembrane space before they are added into the mitochondrial inner membrane. This gene is adjacent to succinate dehydrogenase, subunit D (SDHD), in which mutations have been found in affected members of families with hereditary paraganglioma.[provided by RefSeq, Aug 2009]

ACMG classification

Verdict is Pathogenic. Variant got 18 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant located near the start codon (<100nt), not predicted to undergo nonsense mediated mRNA decay. There are 45 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 11-112086940-C-A is Pathogenic according to our data. Variant chr11-112086940-C-A is described in ClinVar as [Pathogenic]. Clinvar id is 6915.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr11-112086940-C-A is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SDHD	NM_003002.4	c.33C>A	p.Cys11*	stop_gained	Exon 1 of 4	ENST00000375549.8	NP_002993.1
TIMM8B	NM_012459.4	c.-217G>T		upstream_gene_variant		ENST00000504148.3	NP_036591.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SDHD	ENST00000375549.8	c.33C>A	p.Cys11*	stop_gained	Exon 1 of 4	1	NM_003002.4	ENSP00000364699.3
ENSG00000255292	ENST00000532699.1	n.33C>A		non_coding_transcript_exon_variant	Exon 1 of 6	3		ENSP00000456434.1
TIMM8B	ENST00000504148.3	c.-217G>T		upstream_gene_variant		1	NM_012459.4	ENSP00000422122.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:7

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Paragangliomas 1 Pathogenic:4

Sep 26, 2024

Department of Human Genetics, Hannover Medical School

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

ACMG: PVS1, PM2_Supporting, PP4 -

May 09, 2002

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Dec 28, 2021

MGZ Medical Genetics Center

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Aug 29, 2023

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;C1847319:Carney-Stratakis syndrome;C1868633:Paragangliomas with sensorineural hearing loss;CN166604:Cowden syndrome 3 Pathogenic:1

Sep 06, 2024

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.Cys11*) in the SDHD gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in SDHD are known to be pathogenic (PMID: 19454582, 19802898). This variant is not present in population databases (gnomAD no frequency). This premature translational stop signal has been observed in individual(s) with pheochromocytoma and/or paraganglioma (PMID: 12000816, 18826997, 29386252). It is commonly reported in individuals of Polish ancestry (PMID: 12000816, 18826997, 29386252). ClinVar contains an entry for this variant (Variation ID: 6915). For these reasons, this variant has been classified as Pathogenic. -

Pheochromocytoma Pathogenic:1

Dec 09, 2021

Institute of Human Genetics, University of Leipzig Medical Center

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Criteria applied: PVS1, PS4_MOD, PM2_SUP -

Hereditary cancer-predisposing syndrome Pathogenic:1

May 06, 2022

Ambry Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.C11* pathogenic mutation (also known as c.33C>A), located in coding exon 1 of the SDHD gene, results from a C to A substitution at nucleotide position 33. This changes the amino acid from a cysteine to a stop codon within coding exon 1 (p.C11*). This mutation has been reported in multiple individuals diagnosed with pheochromocytoma(s) and/or extra-adrenal paraganglioma(s) (Neumann HP et al. N. Engl. J. Med. 2002 May;346(19):1459-66; Peczkowska M et al. J. Clin. Endocrinol. Metab. 2008 Dec;93(12):4818-25; Michaowska I et al. Neuroendocrinology. 2015 Mar;101:321-30; Michaowska I et al. Kardiochir Torakochirurgia Pol. 2016 Sep;13:276-282). Peczkowaka and colleagues analyzed numerous p.C11* carrier families ascertained through the European-American PGL-PCC registry. In this series, the penetrance of head and neck PGLs in mutation carriers was 100% by age 54 and haplotype analysis data supported p.C11* as a founder mutation of Polish origin (Peczkowska M et al. J. Clin. Endocrinol. Metab. 2008 Dec;93(12):4818-25). 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. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Pathogenic	0.32
CADD	Pathogenic	35
DANN	Uncertain	0.98
Eigen	Uncertain	0.64
Eigen_PC	Uncertain	0.37
FATHMM_MKL	Benign	0.40	N
Vest4		0.76
GERP RS		5.2
RBP_binding_hub_radar		1.0
RBP_regulation_power_radar		2.2

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.050		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: rs104894309; hg19: chr11-111957664;