chr9-136410679-T-A

Position:

chr9-136410679-T-A

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BS1_Supporting

The NM_015160.3(PMPCA):c.11T>A(p.Val4Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000198 in 1,414,852 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/23 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000059 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000015 ( 0 hom. )

Consequence

PMPCA
NM_015160.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.0120

Variant links:

Genes affected

PMPCA (HGNC:18667): (peptidase, mitochondrial processing subunit alpha) The protein encoded by this gene is found in the mitochondrion, where it represents the alpha subunit of a proteolytic heterodimer. This heterodimer is responsible for cleaving the transit peptide from nuclear-encoded mitochondrial proteins. Defects in this gene are a cause of spinocerebellar ataxia, autosomal recessive 2. [provided by RefSeq, Mar 2016]

PMPCA links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BS1

Variant frequency is greater than expected in population eas. gnomad4 allele frequency = 0.0000591 (9/152244) while in subpopulation EAS AF= 0.00174 (9/5168). AF 95% confidence interval is 0.000908. There are 0 homozygotes in gnomad4. There are 5 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
PMPCA	NM_015160.3 linkuse as main transcript	c.11T>A	p.Val4Glu	missense_variant	1/13	ENST00000371717.8
PMPCA	XM_005266059.4 linkuse as main transcript	c.11T>A	p.Val4Glu	missense_variant	1/12
PMPCA	NM_001282944.2 linkuse as main transcript	c.-288T>A		5_prime_UTR_variant	1/12
PMPCA	NM_001282946.2 linkuse as main transcript	c.-288T>A		5_prime_UTR_variant	1/13

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PMPCA	ENST00000371717.8 linkuse as main transcript	c.11T>A	p.Val4Glu	missense_variant	1/13	1	NM_015160.3	P1	Q10713-1

Frequencies

GnomAD3 genomes

AF:

0.0000592

AC:

AN:

152128

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00174

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000575

AC:

AN:

121730

Hom.:

AF XY:

0.0000731

AC XY:

AN XY:

68444

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000963

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000150

AC:

AN:

1262608

Hom.:

Cov.:

AF XY:

0.0000129

AC XY:

AN XY:

620360

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000226

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

9.82e-7

Gnomad4 OTH exome

AF:

0.000216

GnomAD4 genome

AF:

0.0000591

AC:

AN:

152244

Hom.:

Cov.:

AF XY:

0.0000672

AC XY:

AN XY:

74442

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00174

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000712

Hom.:

Bravo

AF:

0.0000378

ExAC

AF:

0.0000669

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jun 22, 2023

This sequence change replaces valine, which is neutral and non-polar, with glutamic acid, which is acidic and polar, at codon 4 of the PMPCA protein (p.Val4Glu). This variant is present in population databases (rs76293177, gnomAD 0.1%). This variant has not been reported in the literature in individuals affected with PMPCA-related conditions. Experimental studies and prediction algorithms are not available or were not evaluated, and the functional significance of this variant is currently unknown. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may create or strengthen a splice site. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.25

BayesDel_addAF

Benign

-0.55

BayesDel_noAF

Benign

-0.56

CADD

Benign

DANN

Benign

0.81

DEOGEN2

Benign

0.086

Eigen

Benign

-1.2

Eigen_PC

Benign

-1.2

FATHMM_MKL

Benign

0.027

LIST_S2

Benign

0.42

M_CAP

Benign

0.034

MetaRNN

Benign

0.013

MetaSVM

Benign

-0.96

MutationAssessor

Benign

0.0

MutationTaster

Benign

1.0

N;N;N

PrimateAI

Uncertain

0.73

PROVEAN

Benign

-0.96

REVEL

Benign

0.063

Sift

Benign

0.094

Sift4G

Benign

0.30

Polyphen

0.079

Vest4

0.40

MutPred

0.57

Loss of helix (P = 0.0072);

MVP

0.099

MPC

0.24

ClinPred

0.018

GERP RS

-1.8

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.097

gMVP

0.68

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.36

Details are displayed if max score is > 0.2

DS_DG_spliceai

0.36

Position offset: 1

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