4-185143348-G-T

Variant names:

• chr4-185143348-G-T
• rs3733652
• NM_001151.4:c.-25G>T

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_001151.4(SLC25A4):​c.-25G>T variant causes a 5 prime UTR premature start codon gain change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000016 in 1,249,880 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.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0000016 (0 hom.)
• Consequence: SLC25A4 NM_001151.4 5_prime_UTR_premature_start_codon_gain
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.82
• Publications: 0 publications found

Genes affected

SLC25A4 (HGNC:10990): (solute carrier family 25 member 4) This gene is a member of the mitochondrial carrier subfamily of solute carrier protein genes. The product of this gene functions as a gated pore that translocates ADP from the cytoplasm into the mitochondrial matrix and ATP from the mitochondrial matrix into the cytoplasm. The protein forms a homodimer embedded in the inner mitochondria membrane. Mutations in this gene have been shown to result in autosomal dominant progressive external opthalmoplegia and familial hypertrophic cardiomyopathy. [provided by RefSeq, Jun 2013]

SLC25A4 Gene-Disease associations (from GenCC):

• mitochondrial disease

  Inheritance: AR Classification: DEFINITIVE Submitted by: G2P
• mitochondrial DNA depletion syndrome 12B (cardiomyopathic type), autosomal recessive

  Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Ambry Genetics, ClinGen, Labcorp Genetics (formerly Invitae)
• Fontaine progeroid syndrome

  Inheritance: AD Classification: STRONG Submitted by: G2P
• mitochondrial DNA depletion syndrome 12A (cardiomyopathic type), autosomal dominant

  Inheritance: AD Classification: STRONG, MODERATE Submitted by: G2P, Ambry Genetics, Labcorp Genetics (formerly Invitae)
• progressive external ophthalmoplegia with mitochondrial DNA deletions, autosomal dominant 2

  Inheritance: AD Classification: STRONG, MODERATE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)
• autosomal dominant progressive external ophthalmoplegia

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• Sengers syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• Leigh syndrome

  Inheritance: AD Classification: LIMITED Submitted by: ClinGen

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.76).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SLC25A4	NM_001151.4	c.-25G>T		5_prime_UTR_premature_start_codon_gain_variant	Exon 1 of 4	ENST00000281456.11	NP_001142.2
SLC25A4	NM_001151.4	c.-25G>T		5_prime_UTR_variant	Exon 1 of 4	ENST00000281456.11	NP_001142.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SLC25A4	ENST00000281456.11	c.-25G>T		5_prime_UTR_premature_start_codon_gain_variant	Exon 1 of 4	1	NM_001151.4	ENSP00000281456.5
SLC25A4	ENST00000281456.11	c.-25G>T		5_prime_UTR_variant	Exon 1 of 4	1	NM_001151.4	ENSP00000281456.5

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 0.00000160 AC: 2 AN: 1249880 Hom.: 0 Cov.: 17 AF XY: 0.00 AC XY: 0 AN XY: 622732

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 26970

American (AMR) AF: 0.00 AC: 0 AN: 33564

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 23294

East Asian (EAS) AF: 0.00 AC: 0 AN: 32720

South Asian (SAS) AF: 0.00 AC: 0 AN: 74716

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 47816

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5276

European-Non Finnish (NFE) AF: 0.00000210 AC: 2 AN: 953324

Other (OTH) AF: 0.00 AC: 0 AN: 52200

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.76
CADD	Benign	12
DANN	Benign	0.80
PhyloP100		1.8
PromoterAI		0.018	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.0

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: rs3733652; hg19: chr4-186064502;