Genetic Variant PITRM1:p.Val1004Leu (chr10-3138245-C-G) – ACMG Classification: Uncertain_significance (4 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2PP3_Moderate

The NM_014889.4(PITRM1):c.3010G>C(p.Val1004Leu) variant causes a missense change. The variant allele was found at a frequency of 0.000000685 in 1,460,370 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V1004M) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

PITRM1
NM_014889.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 5.60

Publications

0 publications found

Variant links:

Genes affected

PITRM1 (HGNC:17663): (pitrilysin metallopeptidase 1) The protein encoded by this gene is an ATP-dependent metalloprotease that degrades post-cleavage mitochondrial transit peptides. The encoded protein binds zinc and can also degrade amyloid beta A4 protein, suggesting a possible role in Alzheimer's disease. [provided by RefSeq, Dec 2016]

PITRM1 Gene-Disease associations (from GenCC):

spinocerebellar ataxia, autosomal recessive 30
Inheritance: AR Classification: STRONG, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Illumina

PITRM1 links:

ENSG00000278419 (HGNC:):

ENSG00000278419 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.905

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PITRM1	NM_014889.4 link	c.3010G>C	p.Val1004Leu	missense_variant	Exon 26 of 27	ENST00000224949.9	NP_055704.2	Q5JRX3-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PITRM1	ENST00000224949.9 link	c.3010G>C	p.Val1004Leu	missense_variant	Exon 26 of 27	1	NM_014889.4	ENSP00000224949.4		Q5JRX3-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.85e-7

AC:

AN:

1460370

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

726612

show subpopulations

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

African (AFR)

AF:

0.00

AC:

AN:

33446

American (AMR)

AF:

0.0000224

AC:

AN:

44722

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26118

East Asian (EAS)

AF:

0.00

AC:

AN:

39696

South Asian (SAS)

AF:

0.00

AC:

AN:

86230

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53352

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1110714

Other (OTH)

AF:

0.00

AC:

AN:

60326

⚠️ 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.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.375

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.40

BayesDel_addAF

Benign

-0.0083

BayesDel_noAF

Benign

-0.25

CADD

Benign

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.15

T;.;.;T

Eigen

Uncertain

0.56

Eigen_PC

Uncertain

0.51

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Benign

0.61

T;T;T;T

M_CAP

Benign

0.083

MetaRNN

Pathogenic

0.90

D;D;D;D

MetaSVM

Benign

-0.40

MutationAssessor

Pathogenic

3.2

M;.;.;.

PhyloP100

5.6

PrimateAI

Benign

0.46

PROVEAN

Uncertain

-2.6

D;D;N;D

REVEL

Uncertain

0.35

Sift

Uncertain

0.0050

D;D;D;D

Sift4G

Uncertain

0.019

D;D;D;T

Polyphen

0.92

P;.;.;.

Vest4

0.63

MutPred

0.71

Loss of catalytic residue at V1004 (P = 0.0438);.;.;.;

MVP

0.62

MPC

0.29

ClinPred

0.97

GERP RS

5.8

Varity_R

0.26

gMVP

0.81

Mutation Taster

=77/23

polymorphism

(source)

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

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10-3138245-C-G

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over