1-161356744-G-C

Variant names:

• chr1-161356744-G-C
• rs768273090
• NM_003001.5:c.309G>C

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_003001.5(SDHC):​c.309G>C​(p.Val103Val) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. V103V) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: SDHC NM_003001.5 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.271
• Publications: 0 publications found

Genes affected

SDHC (HGNC:10682): (succinate dehydrogenase complex subunit C) This gene encodes one of four nuclear-encoded subunits that comprise succinate dehydrogenase, also known as mitochondrial complex II, a key enzyme complex of the tricarboxylic acid cycle and aerobic respiratory chains of mitochondria. The encoded protein is one of two integral membrane proteins that anchor other subunits of the complex, which form the catalytic core, to the inner mitochondrial membrane. There are several related pseudogenes for this gene on different chromosomes. Mutations in this gene have been associated with paragangliomas. Alternatively spliced transcript variants have been described. [provided by RefSeq, May 2013]

SDHC Gene-Disease associations (from GenCC):

• hereditary pheochromocytoma-paraganglioma

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet
• pheochromocytoma/paraganglioma syndrome 3

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, G2P, Labcorp Genetics (formerly Invitae)
• Carney-Stratakis syndrome

  Inheritance: AD Classification: STRONG, SUPPORTIVE Submitted by: Genomics England PanelApp, Orphanet
• gastrointestinal stromal tumor

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), Genomics England PanelApp
• renal cell carcinoma

  Inheritance: AD Classification: MODERATE Submitted by: Genomics England PanelApp
• Cowden disease

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• mitochondrial disease

  Inheritance: Unknown Classification: NO_KNOWN Submitted by: ClinGen

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.59).
• BP7: Synonymous conserved (PhyloP=-0.271 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_003001.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SDHC	NM_003001.5	MANE Select	c.309G>C	p.Val103Val	synonymous	Exon 5 of 6	NP_002992.1	Q99643-1
	SDHC	NM_001407115.1		c.429G>C	p.Val143Val	synonymous	Exon 6 of 7	NP_001394044.1
	SDHC	NM_001407116.1		c.252G>C	p.Val84Val	synonymous	Exon 4 of 5	NP_001394045.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SDHC	ENST00000367975.7	TSL:1 MANE Select	c.309G>C	p.Val103Val	synonymous	Exon 5 of 6	ENSP00000356953.3	Q99643-1
	SDHC	ENST00000432287.6	TSL:1	c.207G>C	p.Val69Val	synonymous	Exon 4 of 5	ENSP00000390558.2	Q99643-3
	SDHC	ENST00000392169.6	TSL:1	c.150G>C	p.Val50Val	synonymous	Exon 3 of 4	ENSP00000376009.2	Q99643-5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.59
CADD	Benign	1.2
DANN	Benign	0.55
PhyloP100		-0.27
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Mutation Taster		=100/0	polymorphism

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

Other links and lift over

dbSNP: rs768273090; hg19: chr1-161326534;