Genetic Variant PSAPL1:p.Cys438Ser (chr4-7433568-A-T) – ACMG Classification: Likely_pathogenic (6 pts)

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM2PP3_Strong

The NM_001085382.2(PSAPL1):c.1312T>A(p.Cys438Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,459,476 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. C438G) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

PSAPL1
NM_001085382.2 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 2.10

Publications

0 publications found

Variant links:

Genes affected

PSAPL1 (HGNC:33131): (prosaposin like 1) This gene encodes a protein that is related to the glycoprotein prosaposin. Based on sequence similarity between the encoded protein and prosaposin, it is predicted that the encoded protein is a preproprotein that is proteolytically processed to generate multiple protein products. These predicted products include saposins A-like, B-like, C-like, and D-like, which may play a role in the lysosomal degradation of sphingolipids. [provided by RefSeq, Jul 2015]

PSAPL1 links:

SORCS2 (HGNC:16698): (sortilin related VPS10 domain containing receptor 2) This gene encodes one family member of vacuolar protein sorting 10 (VPS10) domain-containing receptor proteins. The VPS10 domain name comes from the yeast carboxypeptidase Y sorting receptor Vps10 protein. Members of this gene family are large with many exons but the CDS lengths are usually less than 3700 nt. Very large introns typically separate the exons encoding the VPS10 domain; the remaining exons are separated by much smaller-sized introns. These genes are strongly expressed in the central nervous system. [provided by RefSeq, Jul 2008]

SORCS2 links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.974

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PSAPL1	NM_001085382.2 link	c.1312T>A	p.Cys438Ser	missense_variant	Exon 1 of 1	ENST00000319098.7	NP_001078851.1	Q6NUJ1
SORCS2	NM_020777.3 link	c.548+37213A>T		intron_variant	Intron 2 of 26	ENST00000507866.6	NP_065828.2	Q96PQ0

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
PSAPL1	ENST00000319098.7 link	c.1312T>A	p.Cys438Ser	missense_variant	Exon 1 of 1	6	NM_001085382.2	ENSP00000317445.4	Q6NUJ1
SORCS2	ENST00000507866.6 link	c.548+37213A>T		intron_variant	Intron 2 of 26	1	NM_020777.3	ENSP00000422185.2	Q96PQ0
SORCS2	ENST00000511199.1 link	n.163+37213A>T		intron_variant	Intron 2 of 5	4

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.85e-7

AC:

AN:

1459476

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

725920

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33440

American (AMR)

AF:

0.00

AC:

AN:

44490

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26102

East Asian (EAS)

AF:

0.00

AC:

AN:

39644

South Asian (SAS)

AF:

0.00

AC:

AN:

85900

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52662

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

9.00e-7

AC:

AN:

1111172

Other (OTH)

AF:

0.00

AC:

AN:

60300

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

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

Pathogenic

0.99

BayesDel_addAF

Pathogenic

0.43

BayesDel_noAF

Pathogenic

0.38

CADD

Benign

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.37

Eigen

Benign

0.15

Eigen_PC

Benign

-0.073

FATHMM_MKL

Benign

0.20

LIST_S2

Benign

0.36

M_CAP

Uncertain

0.10

MetaRNN

Pathogenic

0.97

MetaSVM

Uncertain

0.72

MutationAssessor

Pathogenic

3.3

PhyloP100

2.1

PrimateAI

Uncertain

0.55

PROVEAN

Pathogenic

-9.2

REVEL

Pathogenic

0.76

Sift

Pathogenic

0.0

Sift4G

Pathogenic

0.0

Polyphen

1.0

Vest4

0.85

MutPred

0.80

Loss of methylation at K439 (P = 0.0393);

MVP

0.99

MPC

0.23

ClinPred

1.0

GERP RS

3.4

Varity_R

0.91

gMVP

0.71

Mutation Taster

=60/40

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.10

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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chr4-7433568-A-T

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