X-19360959-G-A

Position:

chrX-19360959-G-A

Variant summary

Our verdict is Benign. Variant got -9 ACMG points: 0P and 9B. BP4_StrongBS1_SupportingBS2

The NM_000284.4(PDHA1):c.*1306G>A variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000233 in 489,096 control chromosomes in the GnomAD database, including 1 homozygotes. There are 28 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 0.00017 ( 0 hom., 1 hem., cov: 24)

Exomes 𝑓: 0.00025 ( 1 hom. 27 hem. )

Consequence

PDHA1
NM_000284.4 3_prime_UTR

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.581

Variant links:

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]

PDHA1 links:

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]

MAP3K15 links:

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ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -9 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.88).

BS1

Variant frequency is greater than expected in population amr. gnomad4 allele frequency = 0.000168 (19/113201) while in subpopulation AMR AF= 0.000465 (5/10749). AF 95% confidence interval is 0.000183. There are 0 homozygotes in gnomad4. There are 1 alleles in male gnomad4 subpopulation. Median coverage is 24. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

BS2

High Hemizygotes in GnomAdExome4 at 27 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PDHA1	NM_000284.4 linkuse as main transcript	c.*1306G>A		3_prime_UTR_variant	11/11	ENST00000422285.7
MAP3K15	NM_001001671.4 linkuse as main transcript	c.3858-126C>T		intron_variant		ENST00000338883.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PDHA1	ENST00000422285.7 linkuse as main transcript	c.*1306G>A		3_prime_UTR_variant	11/11	1	NM_000284.4	P1	P08559-1
MAP3K15	ENST00000338883.9 linkuse as main transcript	c.3858-126C>T		intron_variant		5	NM_001001671.4	P1	Q6ZN16-1

Frequencies

GnomAD3 genomes

AF:

0.000168

AC:

AN:

113201

Hom.:

Cov.:

AF XY:

0.0000283

AC XY:

AN XY:

35347

show subpopulations

Gnomad AFR

AF:

0.0000640

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000465

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000187

Gnomad OTH

AF:

0.00132

GnomAD4 exome

AF:

0.000253

AC:

AN:

375895

Hom.:

Cov.:

AF XY:

0.000246

AC XY:

AN XY:

109777

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000986

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000850

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000308

Gnomad4 OTH exome

AF:

0.000189

GnomAD4 genome

AF:

0.000168

AC:

AN:

113201

Hom.:

Cov.:

AF XY:

0.0000283

AC XY:

AN XY:

35347

show subpopulations

Gnomad4 AFR

AF:

0.0000640

Gnomad4 AMR

AF:

0.000465

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000187

Gnomad4 OTH

AF:

0.00132

Alfa

AF:

0.000142

Hom.:

Bravo

AF:

0.000189

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

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

-0.88

CADD

Benign

0.73

DANN

Benign

0.79

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over