NM_003001.5:c.273A>C

Variant names:

• chr1-161356708-A-C
• rs779160244
• NM_003001.5:c.273A>C
• SDHC p.Leu91Phe

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_003001.5(SDHC):​c.273A>C​(p.Leu91Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,736 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. L91V) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: SDHC NM_003001.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.928
• Publications: 2 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: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.35726994).

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.273A>C	p.Leu91Phe	missense	Exon 5 of 6	NP_002992.1	Q99643-1
	SDHC	NM_001407115.1		c.393A>C	p.Leu131Phe	missense	Exon 6 of 7	NP_001394044.1
	SDHC	NM_001407116.1		c.216A>C	p.Leu72Phe	missense	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.273A>C	p.Leu91Phe	missense	Exon 5 of 6	ENSP00000356953.3	Q99643-1
	SDHC	ENST00000432287.6	TSL:1	c.171A>C	p.Leu57Phe	missense	Exon 4 of 5	ENSP00000390558.2	Q99643-3
	SDHC	ENST00000392169.6	TSL:1	c.114A>C	p.Leu38Phe	missense	Exon 3 of 4	ENSP00000376009.2	Q99643-5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000402 AC: 1 AN: 248928 AF XY: 0.00000742

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461736 Hom.: 0 Cov.: 32 AF XY: 0.00000138 AC XY: 1 AN XY: 727176

African (AFR) AF: 0.00 AC: 0 AN: 33472

American (AMR) AF: 0.00 AC: 0 AN: 44718

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26134

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.0000116 AC: 1 AN: 86252

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53418

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5764

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111896

Other (OTH) AF: 0.00 AC: 0 AN: 60382

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Uncertain	0.039	T
BayesDel_noAF	Benign	-0.090
CADD	Benign	18
DANN	Uncertain	0.99
DEOGEN2	Benign	0.19	T
Eigen	Benign	-0.52
Eigen_PC	Benign	-0.38
FATHMM_MKL	Benign	0.47	N
LIST_S2	Benign	0.81	T
M_CAP	Uncertain	0.19	D
MetaRNN	Benign	0.36	T
MetaSVM	Uncertain	-0.21	T
MutationAssessor	Benign	1.7	L
PhyloP100		0.93
PrimateAI	Benign	0.45	T
PROVEAN	Uncertain	-2.4	N
REVEL	Uncertain	0.29
Sift	Benign	0.077	T
Sift4G	Benign	0.19	T
Varity_R		0.11
gMVP		0.62
Mutation Taster		=72/28	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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

dbSNP: rs779160244; hg19: chr1-161326498;