dbSNP rs113394351: PPT1:c.124+18T>G (chr1-40097097-A-C) – ACMG Classification: Benign (-20 pts)

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBA1

The NM_000310.4(PPT1):c.124+18T>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00302 in 1,613,914 control chromosomes in the GnomAD database, including 120 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.016 ( 62 hom., cov: 32)

Exomes 𝑓: 0.0017 ( 58 hom. )

Consequence

PPT1
NM_000310.4 intron

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:5

Conservation

PhyloP100: -0.183

Variant links:

Genes affected

PPT1 (HGNC:9325): (palmitoyl-protein thioesterase 1) The protein encoded by this gene is a small glycoprotein involved in the catabolism of lipid-modified proteins during lysosomal degradation. The encoded enzyme removes thioester-linked fatty acyl groups such as palmitate from cysteine residues. Defects in this gene are a cause of infantile neuronal ceroid lipofuscinosis 1 (CLN1, or INCL) and neuronal ceroid lipofuscinosis 4 (CLN4). Two transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, Dec 2008]

PPT1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -20 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.85).

BP6

Variant 1-40097097-A-C is Benign according to our data. Variant chr1-40097097-A-C is described in ClinVar as [Benign]. Clinvar id is 138801.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BA1

GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.0544 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	Effect	Exon rank	MANE	Protein	UniProt
PPT1	NM_000310.4 link	c.124+18T>G	intron_variant	Intron 1 of 8	ENST00000642050.2	NP_000301.1	P50897-1
PPT1	NM_001363695.2 link	c.124+18T>G	intron_variant	Intron 1 of 7		NP_001350624.1
PPT1	NM_001142604.2 link	c.124+18T>G	intron_variant	Intron 1 of 5		NP_001136076.1	P50897-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PPT1	ENST00000642050.2 link	c.124+18T>G		intron_variant	Intron 1 of 8		NM_000310.4	ENSP00000493153.1		P50897-1

Frequencies

GnomAD3 genomes

AF:

0.0161

AC:

2450

AN:

152138

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0561

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00589

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.000176

Gnomad OTH

AF:

0.0100

GnomAD3 exomes

AF:

0.00434

AC:

1086

AN:

250148

Hom.:

AF XY:

0.00333

AC XY:

451

AN XY:

135276

show subpopulations

Gnomad AFR exome

AF:

0.0584

Gnomad AMR exome

AF:

0.00280

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000980

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000222

Gnomad OTH exome

AF:

0.00196

GnomAD4 exome

AF:

0.00165

AC:

2419

AN:

1461658

Hom.:

Cov.:

AF XY:

0.00142

AC XY:

1033

AN XY:

727150

show subpopulations

Gnomad4 AFR exome

AF:

0.0577

Gnomad4 AMR exome

AF:

0.00315

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000128

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000998

Gnomad4 OTH exome

AF:

0.00351

GnomAD4 genome

AF:

0.0162

AC:

2463

AN:

152256

Hom.:

Cov.:

AF XY:

0.0158

AC XY:

1178

AN XY:

74444

show subpopulations

Gnomad4 AFR

AF:

0.0563

Gnomad4 AMR

AF:

0.00588

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000162

Gnomad4 OTH

AF:

0.00993

Alfa

AF:

0.00810

Hom.:

Bravo

AF:

0.0187

Asia WGS

AF:

0.00346

AC:

AN:

3478

ClinVar

Significance: Benign

Submissions summary: Benign:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:2

Mar 22, 2012

GeneDx

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

PreventionGenetics, part of Exact Sciences

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided

Benign:2

Breakthrough Genomics, Breakthrough Genomics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: not provided

- -

May 15, 2017

Mayo Clinic Laboratories, Mayo Clinic

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Neuronal ceroid lipofuscinosis 1

Benign:1

Feb 03, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.85

CADD

Benign

4.6

DANN

Benign

0.42

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