5-254484-A-G

Variant names:

• chr5-254484-A-G
• rs6960
• NM_004168.4:c.1886A>G

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 0P and 0B.

The NM_004168.4(SDHA):​c.1886A>G​(p.Tyr629Cys) variant causes a missense change. The variant allele was found at a frequency of 0.0000112 in 1,423,840 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. Y629F) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 28)
  • Exomes 𝑓: 0.000011 (0 hom.)
• Consequence: SDHA NM_004168.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:5
• Conservation: PhyloP100: 4.37
• Publications: 30 publications found

Genes affected

SDHA (HGNC:10680): (succinate dehydrogenase complex flavoprotein subunit A) This gene encodes a major catalytic subunit of succinate-ubiquinone oxidoreductase, a complex of the mitochondrial respiratory chain. The complex is composed of four nuclear-encoded subunits and is localized in the mitochondrial inner membrane. Mutations in this gene have been associated with a form of mitochondrial respiratory chain deficiency known as Leigh Syndrome. A pseudogene has been identified on chromosome 3q29. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jun 2014]

SDHA Gene-Disease associations (from GenCC):

• hereditary pheochromocytoma-paraganglioma

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet
• pheochromocytoma/paraganglioma syndrome 5

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: G2P, Illumina, Ambry Genetics, Labcorp Genetics (formerly Invitae)
• mitochondrial complex II deficiency, nuclear type 1

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
• neurodegeneration with ataxia and late-onset optic atrophy

  Inheritance: AD Classification: STRONG, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics
• Leigh syndrome

  Inheritance: AR Classification: MODERATE Submitted by: Ambry Genetics, ClinGen
• familial isolated dilated cardiomyopathy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• gastrointestinal stromal tumor

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• Leigh syndrome with leukodystrophy

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• mitochondrial complex II deficiency

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• dilated cardiomyopathy 1GG

  Inheritance: AR Classification: LIMITED Submitted by: Ambry Genetics

ENSG00000286001 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004168.4. 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
	SDHA	NM_004168.4	MANE Select	c.1886A>G	p.Tyr629Cys	missense	Exon 14 of 15	NP_004159.2
	SDHA	NM_001294332.2		c.1742A>G	p.Tyr581Cys	missense	Exon 13 of 14	NP_001281261.1
	SDHA	NM_001330758.2		c.1643A>G	p.Tyr548Cys	missense	Exon 12 of 13	NP_001317687.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SDHA	ENST00000264932.11	TSL:1 MANE Select	c.1886A>G	p.Tyr629Cys	missense	Exon 14 of 15	ENSP00000264932.6
	ENSG00000286001	ENST00000651543.1		n.*619A>G		non_coding_transcript_exon	Exon 13 of 24	ENSP00000499215.1
	ENSG00000286001	ENST00000651543.1		n.*619A>G		3_prime_UTR	Exon 13 of 24	ENSP00000499215.1

Frequencies

GnomAD3 genomes Cov.: 28

GnomAD2 exomes AF: 0.0000180 AC: 3 AN: 166952 AF XY: 0.0000113

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: 0.0000299

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000112 AC: 16 AN: 1423840 Hom.: 0 Cov.: 32 AF XY: 0.00000993 AC XY: 7 AN XY: 704898

African (AFR) AF: 0.00 AC: 0 AN: 32354

American (AMR) AF: 0.00 AC: 0 AN: 39650

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25380

East Asian (EAS) AF: 0.0000260 AC: 1 AN: 38396

South Asian (SAS) AF: 0.0000246 AC: 2 AN: 81300

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 50960

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4124

European-Non Finnish (NFE) AF: 0.0000119 AC: 13 AN: 1092860

Other (OTH) AF: 0.00 AC: 0 AN: 58816

GnomAD4 genome Cov.: 28

ExAC AF: 0.00000889 AC: 1

ClinVar

ClinVar submissions as Germline

Significance: Uncertain significance

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	2	-	not provided (2)
-	1	-	Dilated cardiomyopathy 1GG (1)
-	1	-	Hereditary cancer-predisposing syndrome (1)
-	1	-	Pheochromocytoma/paraganglioma syndrome 5;C5700310:Mitochondrial complex II deficiency, nuclear type 1 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.095
BayesDel_addAF	Benign	-0.080	T
BayesDel_noAF	Pathogenic	0.22
CADD	Benign	20
DANN	Benign	0.25
DEOGEN2	Benign	0.23	T
Eigen	Benign	-0.26
Eigen_PC	Benign	-0.34
FATHMM_MKL	Uncertain	0.85	D
LIST_S2	Benign	0.32	T
M_CAP	Pathogenic	0.63	D
MetaRNN	Uncertain	0.43	T
MetaSVM	Uncertain	-0.13	T
PhyloP100		4.4
PROVEAN	Benign	0.50	N
REVEL	Uncertain	0.32
Sift	Pathogenic	0.0	D
Sift4G	Uncertain	0.013	D
MutPred		0.48		Loss of MoRF binding (P = 0.0907)
MVP		0.85
ClinPred		0.71	D
GERP RS		2.9
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.64
Mutation Taster		=76/24	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: rs6960; hg19: chr5-254599;