M-11443-A-G

Variant names:

• chrM-11443-A-G
• rs1556423952
• ENST00000361381.2:c.684A>G

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BP7 BS2

The ENST00000361381.2(MT-ND4):​c.684A>G​(p.Ser228Ser) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. S228S) has been classified as Uncertain significance.

• Frequency: Mitomap GenBank: 𝑓 0.00010 (AC: 5)
• Consequence: MT-ND4 ENST00000361381.2 synonymous
• Clinical Significance: Not reported in ClinVar No linked disesase in Mitomap
• Conservation: PhyloP100: -12.6
• Publications: 0 publications found

Genes affected

MT-ND4 (HGNC:7459): (mitochondrially encoded NADH dehydrogenase 4) Enables NADH dehydrogenase (ubiquinone) activity. Involved in mitochondrial electron transport, NADH to ubiquinone and mitochondrial respiratory chain complex I assembly. Part of mitochondrial respiratory chain complex I. Implicated in Leber hereditary optic neuropathy; Parkinson's disease; macular degeneration; and schizophrenia. Biomarker of Alzheimer's disease. [provided by Alliance of Genome Resources, Apr 2022]

MT-ND4 Gene-Disease associations (from GenCC):

• Leber hereditary optic neuropathy

  Inheritance: Mitochondrial Classification: DEFINITIVE, SUPPORTIVE Submitted by: G2P, Orphanet
• Leigh syndrome

  Inheritance: Mitochondrial Classification: DEFINITIVE Submitted by: ClinGen
• mitochondrial disease

  Inheritance: Mitochondrial Classification: DEFINITIVE Submitted by: ClinGen
• Leber plus disease

  Inheritance: Mitochondrial Classification: SUPPORTIVE Submitted by: Orphanet
• maternally-inherited Leigh syndrome

  Inheritance: Mitochondrial Classification: SUPPORTIVE Submitted by: Orphanet
• MELAS syndrome

  Inheritance: Mitochondrial Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_benign. The variant received -5 ACMG points.

• BP7: Synonymous conserved (PhyloP=-12.6 with no splicing effect.
• BS2: High AC in GnomadMitoHomoplasmic at 7

Variant Effect in Transcripts

ACMG analysis was done for transcript: ENST00000361381.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MT-ND4	ENST00000361381.2	TSL:6	c.684A>G	p.Ser228Ser	synonymous	Exon 1 of 1	ENSP00000354961.2

Frequencies

Mitomap GenBank AF: 0.00010 AC: 5

Gnomad homoplasmic AF: 0.00012 AC: 7 AN: 56433

Gnomad heteroplasmic AF: 0.0 AC: 0 AN: 56433

Alfa AF: 0.000223 Hom.: 1

Mitomap

No disease associated.

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		-13
Mutation Taster		=57/43	polymorphism

Other links and lift over

dbSNP: rs1556423952; hg19: chrM-11444;