Genetic Variant PCMT1:p.Asp171Asn (chr6-149802206-G-A) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_001360452.2(PCMT1):c.511G>A(p.Asp171Asn) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000661 in 151,224 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

PCMT1
NM_001360452.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 9.99

Variant links:

Genes affected

PCMT1 (HGNC:8728): (protein-L-isoaspartate (D-aspartate) O-methyltransferase) This gene encodes a member of the type II class of protein carboxyl methyltransferase enzymes. The encoded enzyme plays a role in protein repair by recognizing and converting D-aspartyl and L-isoaspartyl residues resulting from spontaneous deamidation back to the normal L-aspartyl form. The encoded protein may play a protective role in the pathogenesis of Alzheimer's disease, and single nucleotide polymorphisms in this gene have been associated with spina bifida and premature ovarian failure. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene. [provided by RefSeq, Oct 2011]

PCMT1 links:

ENSG00000285889 (HGNC:):

ENSG00000285889 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PCMT1	NM_001360452.2 link	c.511G>A	p.Asp171Asn	missense_variant	Exon 7 of 8	ENST00000464889.7	NP_001347381.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PCMT1	ENST00000464889.7 link	c.511G>A	p.Asp171Asn	missense_variant	Exon 7 of 8	1	NM_001360452.2	ENSP00000420813.2		P22061-1

Frequencies

GnomAD3 genomes

AF:

0.00000661

AC:

AN:

151224

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000660

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

Data not reliable, filtered out with message: AC0

AF:

0.00

AC:

AN:

1425668

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

708814

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000661

AC:

AN:

151224

Hom.:

Cov.:

AF XY:

0.0000136

AC XY:

AN XY:

73788

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.0000660

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

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:

0.0000151

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Apr 04, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.685G>A (p.D229N) alteration is located in exon 7 (coding exon 7) of the PCMT1 gene. This alteration results from a G to A substitution at nucleotide position 685, causing the aspartic acid (D) at amino acid position 229 to be replaced by an asparagine (N). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.12

BayesDel_addAF

Benign

-0.18

BayesDel_noAF

Benign

-0.50

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.36

.;T;T;T;.;T;.

Eigen

Benign

0.089

Eigen_PC

Uncertain

0.28

FATHMM_MKL

Uncertain

0.97

LIST_S2

Pathogenic

0.99

D;.;D;D;D;D;D

M_CAP

Benign

0.013

MetaRNN

Uncertain

0.53

D;D;D;D;D;D;D

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.8

L;L;L;.;.;.;.

PrimateAI

Pathogenic

0.81

REVEL

Benign

0.24

Sift4G

Benign

0.18

.;.;.;.;T;T;.

Polyphen

0.0

B;B;B;.;.;.;.

Vest4

0.49, 0.49

MutPred

0.51

Gain of MoRF binding (P = 0.1595);Gain of MoRF binding (P = 0.1595);Gain of MoRF binding (P = 0.1595);.;.;.;.;

MVP

0.32

MPC

0.80

ClinPred

0.96

GERP RS

5.8

Varity_R

0.45

gMVP

0.83

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

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