VCV001745142.6 - ClinVar

NM_004168.4(SDHA):c.506A>G (p.Tyr169Cys)

Germline

Classification

The aggregate germline classification for this variant, typically for a monogenic or Mendelian disorder as in the ACMG/AMP guidelines, or for response to a drug. This value is calculated by NCBI based on data from submitters. Read our rules for calculating the aggregate classification.

(3)

Stars represent the aggregate review status, or the level of review supporting the aggregate germline classification for this VCV record. This value is calculated by NCBI based on data from submitters. Read our rules for calculating the review status. The number of submissions which contribute to this review status is shown in parentheses.

Uncertain significance

criteria provided, multiple submitters, no conflicts

Somatic

No data submitted for somatic clinical impact

Somatic

No data submitted for oncogenicity

Variant Details

Identifiers

NM_004168.4(SDHA):c.506A>G (p.Tyr169Cys)

Variation ID: 1745142 Accession: VCV001745142.6

Type and length

single nucleotide variant, 1 bp

Location

Cytogenetic: 5p15.33 5: 225932 (GRCh38) [ NCBI UCSC ] 5: 226047 (GRCh37) [ NCBI UCSC ]

Timeline in ClinVar

	First in ClinVar Help The date this variant first appeared in ClinVar with each type of classification.	Last submission Help The date of the most recent submission for each type of classification for this variant.	Last evaluated Help The most recent date that a submitter evaluated this variant for each type of classification.
Germline	Nov 29, 2022	Jun 17, 2024	Feb 16, 2024

HGVS

Nucleotide	Protein	Molecular consequence
NM_004168.4:c.506A>G MANE Select Help Transcripts from the Matched Annotation from the NCBI and EMBL-EBI (MANE) collaboration.	NP_004159.2:p.Tyr169Cys	missense
NM_001294332.2:c.362A>G	NP_001281261.1:p.Tyr121Cys	missense
NM_001330758.2:c.506A>G	NP_001317687.1:p.Tyr169Cys	missense
NC_000005.10:g.225932A>G
NC_000005.9:g.226047A>G
NG_012339.1:g.12692A>G
LRG_315:g.12692A>G
LRG_315t1:c.506A>G	LRG_315p1:p.Tyr169Cys

... more HGVS ... less HGVS

Protein change

Y121C, Y169C

Other names

Canonical SPDI

NC_000005.10:225931:A:G

Functional consequence Help The effect of the variant on RNA or protein function, based on experimental evidence from submitters.

Global minor allele frequency (GMAF) Help The global minor allele frequency calculated by the 1000 Genomes Project. The minor allele at this location is indicated in parentheses and may be different from the allele represented by this VCV record.

Allele frequency Help The frequency of the allele represented by this VCV record.

Links

VarSome

Genes

Gene	OMIM	ClinGen Gene Dosage Sensitivity Curation		Variation Viewer Help Links to Variation Viewer, a genome browser to view variation data from NCBI databases.	Related variants
Gene	OMIM	HI score Help The haploinsufficiency score for the gene, curated by ClinGen’s Dosage Sensitivity Curation task team.	TS score Help The triplosensitivity score for the gene, curated by ClinGen’s Dosage Sensitivity Curation task team.		Within gene Help The number of variants in ClinVar that are contained within this gene, with a link to view the list of variants.	All Help The number of variants in ClinVar for this gene, including smaller variants within the gene and larger CNVs that overlap or fully contain the gene.
SDHA		-	-	GRCh38 GRCh37	2739	2898

Conditions - Germline

Condition Help The condition for this variant-condition (RCV) record in ClinVar.	Classification Help The aggregate germline classification for this variant-condition (RCV) record in ClinVar. The number of submissions that contribute to this aggregate classification is shown in parentheses. (# of submissions)	Review status Help The aggregate review status for this variant-condition (RCV) record in ClinVar. This value is calculated by NCBI based on data from submitters. Read our rules for calculating the review status.	Last evaluated Help The most recent date that a submitter evaluated this variant for the condition.	Variation/condition record Help The RCV accession number, with most recent version number, for the variant-condition record, with a link to the RCV web page.
Hereditary cancer-predisposing syndrome	Uncertain significance (1)	criteria provided, single submitter	Aug 22, 2022	RCV002335825.2
Mitochondrial complex II deficiency, nuclear type 1 Paragangliomas 5	Uncertain significance (1)	criteria provided, single submitter	Apr 16, 2023	RCV003096600.3
Dilated cardiomyopathy 1GG	Uncertain significance (1)	criteria provided, single submitter	Feb 16, 2024	RCV004572297.1

Submissions - Germline

Classification Help The submitted germline classification for each SCV record. (Last evaluated)	Review status Help Stars represent the review status, or the level of review supporting the submitted (SCV) record. This value is calculated by NCBI based on data from the submitter. Read our rules for calculating the review status. This column also includes a link to the submitter’s assertion criteria if provided, and the collection method. (Assertion criteria)	Condition Help The condition for the classification, provided by the submitter for this submitted (SCV) record. This column also includes the affected status and allele origin of individuals observed with this variant.	Submitter Help The submitting organization for this submitted (SCV) record. This column also includes the SCV accession and version number, the date this SCV first appeared in ClinVar, and the date that this SCV was last updated in ClinVar.	More information Help This column includes more information supporting the classification, including citations, the comment on classification, and detailed evidence provided as observations of the variant by the submitter.
Uncertain significance (Feb 16, 2024)	criteria provided, single submitter (ACMG Guidelines, 2015) Method: clinical testing	Dilated cardiomyopathy 1GG Affected status: unknown Allele origin: unknown	Baylor Genetics Accession: SCV005055616.1 First in ClinVar: Jun 17, 2024 Last updated: Jun 17, 2024
Uncertain significance (Aug 22, 2022)	criteria provided, single submitter (Ambry Variant Classification Scheme 2023) Method: clinical testing	Hereditary cancer-predisposing syndrome Affected status: unknown Allele origin: germline	Ambry Genetics Accession: SCV002644085.2 First in ClinVar: Nov 29, 2022 Last updated: May 01, 2024	Comment: The p.Y169C variant (also known as c.506A>G), located in coding exon 5 of the SDHA gene, results from an A to G substitution at nucleotide … (more) The p.Y169C variant (also known as c.506A>G), located in coding exon 5 of the SDHA gene, results from an A to G substitution at nucleotide position 506. The tyrosine at codon 169 is replaced by cysteine, an amino acid with highly dissimilar properties. This amino acid position is conserved. In addition, this alteration is predicted to be deleterious by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. (less)
Uncertain significance (Apr 16, 2023)	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015)) Method: clinical testing	Paragangliomas 5 Mitochondrial complex II deficiency, nuclear type 1 Explanation for multiple conditions: Uncertain. The variant was classified for several related diseases, possibly a spectrum of disease; the variant may be associated with one or more the diseases. Affected status: unknown Allele origin: germline	Labcorp Genetics (formerly Invitae), Labcorp Accession: SCV002978198.2 First in ClinVar: Feb 07, 2023 Last updated: Feb 28, 2024	Comment: This variant has not been reported in the literature in individuals affected with SDHA-related conditions. This variant is present in population databases (no rsID available, … (more) This variant has not been reported in the literature in individuals affected with SDHA-related conditions. This variant is present in population databases (no rsID available, gnomAD 0.0009%). This sequence change replaces tyrosine, which is neutral and polar, with cysteine, which is neutral and slightly polar, at codon 169 of the SDHA protein (p.Tyr169Cys). ClinVar contains an entry for this variant (Variation ID: 1745142). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) has been performed at Invitae for this missense variant, however the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on SDHA protein function. (less)

Comment:

The p.Y169C variant (also known as c.506A>G), located in coding exon 5 of the SDHA gene, results from an A to G substitution at nucleotide position 506. The tyrosine at codon 169 is replaced by cysteine, an amino acid with highly dissimilar properties. This amino acid position is conserved. In addition, this alteration is predicted to be deleterious by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear.

Comment:

This variant has not been reported in the literature in individuals affected with SDHA-related conditions. This variant is present in population databases (no rsID available, gnomAD 0.0009%). This sequence change replaces tyrosine, which is neutral and polar, with cysteine, which is neutral and slightly polar, at codon 169 of the SDHA protein (p.Tyr169Cys). ClinVar contains an entry for this variant (Variation ID: 1745142). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) has been performed at Invitae for this missense variant, however the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on SDHA protein function.

Germline Functional Evidence

There is no functional evidence in ClinVar for this variation. If you have generated functional data for this variation, please consider submitting that data to ClinVar.

Comment:

Citations for germline classification of this variant

There are no citations for germline classification of this variant in ClinVar. If you know of citations for this variation, please consider submitting that information to ClinVar.

Text-mined citations for this variant ...

Record last updated Sep 29, 2024

ClinVar Genomic variation as it relates to human health

NM_004168.4(SDHA):c.506A>G (p.Tyr169Cys)

Variant Details

Genes

Conditions - Germline

Submissions - Germline

Germline Functional Evidence

Citations for germline classification of this variant

Text-mined citations for this variant ...