chr1-40087661-G-T

Position:

• chr1-40087661-G-T

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_000310.4(PPT1):​c.536+1749C>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.256 in 151,866 control chromosomes in the GnomAD database, including 5,475 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.26 (5475 hom., cov: 32)
• Consequence: PPT1 NM_000310.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.0660

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]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-1.03).
• BA1: GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.38 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PPT1	NM_000310.4	c.536+1749C>A		intron_variant		ENST00000642050.2	NP_000301.1
PPT1	NM_001142604.2	c.227+1749C>A		intron_variant			NP_001136076.1
PPT1	NM_001363695.2	c.536+1749C>A		intron_variant			NP_001350624.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PPT1	ENST00000642050.2	c.536+1749C>A		intron_variant			NM_000310.4	ENSP00000493153	P1

Frequencies

GnomAD3 genomes AF: 0.256 AC: 38816 AN: 151748 Hom.: 5459 Cov.: 32

Gnomad AFR AF: 0.339

Gnomad AMI AF: 0.116

Gnomad AMR AF: 0.241

Gnomad ASJ AF: 0.156

Gnomad EAS AF: 0.394

Gnomad SAS AF: 0.340

Gnomad FIN AF: 0.288

Gnomad MID AF: 0.184

Gnomad NFE AF: 0.196

Gnomad OTH AF: 0.216

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.256 AC: 38879 AN: 151866 Hom.: 5475 Cov.: 32 AF XY: 0.263 AC XY: 19539 AN XY: 74198

Gnomad4 AFR AF: 0.339

Gnomad4 AMR AF: 0.241

Gnomad4 ASJ AF: 0.156

Gnomad4 EAS AF: 0.394

Gnomad4 SAS AF: 0.341

Gnomad4 FIN AF: 0.288

Gnomad4 NFE AF: 0.196

Gnomad4 OTH AF: 0.219

Alfa AF: 0.199 Hom.: 4555

Bravo AF: 0.257

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-1.0
CADD	Benign	5.1
DANN	Benign	0.54

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

Other links and lift over

dbSNP: rs7513553; hg19: chr1-40553333;