X-19360382-G-A

Position:

• chrX-19360382-G-A

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 0P and 8B. BP4_Strong BS2

The NM_001001671.4(MAP3K15):​c.*367C>T variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000383 in 159,227 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 15 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.00032 (0 hom., 9 hem., cov: 23)
  • Exomes 𝑓: 0.00052 (0 hom. 6 hem.)
• Consequence: MAP3K15 NM_001001671.4 3_prime_UTR
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -1.60

Genes affected

PDHA1 (HGNC:8806): (pyruvate dehydrogenase E1 subunit alpha 1) The pyruvate dehydrogenase (PDH) complex is a nuclear-encoded mitochondrial multienzyme complex that catalyzes the overall conversion of pyruvate to acetyl-CoA and CO(2), and provides the primary link between glycolysis and the tricarboxylic acid (TCA) cycle. The PDH complex is composed of multiple copies of three enzymatic components: pyruvate dehydrogenase (E1), dihydrolipoamide acetyltransferase (E2) and lipoamide dehydrogenase (E3). The E1 enzyme is a heterotetramer of two alpha and two beta subunits. This gene encodes the E1 alpha 1 subunit containing the E1 active site, and plays a key role in the function of the PDH complex. Mutations in this gene are associated with pyruvate dehydrogenase E1-alpha deficiency and X-linked Leigh syndrome. Alternatively spliced transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, Mar 2010]

MAP3K15 (HGNC:31689): (mitogen-activated protein kinase kinase kinase 15) The protein encoded by this gene is a member of the mitogen-activated protein kinase (MAPK) family. These family members function in a protein kinase signal transduction cascade, where an activated MAPK kinase kinase (MAP3K) phosphorylates and activates a specific MAPK kinase (MAP2K), which then activates a specific MAPK. This MAP3K protein plays an essential role in apoptotic cell death triggered by cellular stresses. [provided by RefSeq, Jul 2010]

ACMG classification

Verdict is Benign. Variant got -8 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.91).
• BS2: High Hemizygotes in GnomAd4 at 9 gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PDHA1	NM_000284.4	c.*729G>A		3_prime_UTR_variant	11/11	ENST00000422285.7
MAP3K15	NM_001001671.4	c.*367C>T		3_prime_UTR_variant	29/29	ENST00000338883.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MAP3K15	ENST00000338883.9	c.*367C>T		3_prime_UTR_variant	29/29	5	NM_001001671.4	P1
PDHA1	ENST00000422285.7	c.*729G>A		3_prime_UTR_variant	11/11	1	NM_000284.4	P1

Frequencies

GnomAD3 genomes AF: 0.000314 AC: 35 AN: 111357 Hom.: 0 Cov.: 23 AF XY: 0.000238 AC XY: 8 AN XY: 33597

Gnomad AFR AF: 0.0000653

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000958

Gnomad ASJ AF: 0.000380

Gnomad EAS AF: 0.000283

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.000168

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000546

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.000523 AC: 25 AN: 47820 Hom.: 0 Cov.: 0 AF XY: 0.000575 AC XY: 6 AN XY: 10434

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.000557

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00284

Gnomad4 SAS exome AF: 0.000381

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.000528

Gnomad4 OTH exome AF: 0.000719

GnomAD4 genome AF: 0.000323 AC: 36 AN: 111407 Hom.: 0 Cov.: 23 AF XY: 0.000267 AC XY: 9 AN XY: 33657

Gnomad4 AFR AF: 0.0000652

Gnomad4 AMR AF: 0.0000957

Gnomad4 ASJ AF: 0.000380

Gnomad4 EAS AF: 0.000284

Gnomad4 SAS AF: 0.000374

Gnomad4 FIN AF: 0.000168

Gnomad4 NFE AF: 0.000546

Gnomad4 OTH AF: 0.00

Alfa AF: 0.0000712 Hom.: 0

Bravo AF: 0.000329

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Pyruvate dehydrogenase E1-alpha deficiency Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.91
CADD	Benign	0.99
DANN	Benign	0.43

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

Publications

LitVar

Other links and lift over

dbSNP: rs376808450; hg19: chrX-19378500;