4-7433932-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001085382.2(PSAPL1):c.948G>C(p.Met316Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: PSAPL1 NM_001085382.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.334

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]

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.15776798).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PSAPL1	NM_001085382.2	c.948G>C	p.Met316Ile	missense_variant	1/1	ENST00000319098.7
SORCS2	NM_020777.3	c.548+37577C>G		intron_variant		ENST00000507866.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PSAPL1	ENST00000319098.7	c.948G>C	p.Met316Ile	missense_variant	1/1		NM_001085382.2	P1
SORCS2	ENST00000507866.6	c.548+37577C>G		intron_variant		1	NM_020777.3	P1
SORCS2	ENST00000511199.1	n.163+37577C>G		intron_variant, non_coding_transcript_variant		4

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 63

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 11, 2022

The c.948G>C (p.M316I) alteration is located in exon 1 (coding exon 1) of the PSAPL1 gene. This alteration results from a G to C substitution at nucleotide position 948, causing the methionine (M) at amino acid position 316 to be replaced by an isoleucine (I). 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	0.27
BayesDel_addAF	Benign	-0.22	T
BayesDel_noAF	Benign	-0.55
Cadd	Benign	1.2
Dann	Benign	0.66
DEOGEN2	Benign	0.071	T
Eigen	Benign	-1.2
Eigen_PC	Benign	-1.2
FATHMM_MKL	Benign	0.0036	N
LIST_S2	Benign	0.33	T
M_CAP	Benign	0.0070	T
MetaRNN	Benign	0.16	T
MetaSVM	Benign	-0.92	T
MutationAssessor	Benign	-0.35	N
MutationTaster	Benign	1.0	N;N;N
PrimateAI	Benign	0.33	T
PROVEAN	Benign	-0.71	N
REVEL	Benign	0.17
Sift	Benign	0.10	T
Sift4G	Benign	0.94	T
Polyphen		0.0	B
Vest4		0.072
MutPred		0.59		Gain of helix (P = 0.0496);
MVP		0.64
MPC		0.028
ClinPred		0.035	T
GERP RS		-0.23
Varity_R		0.084
gMVP		0.18

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr4-7435659;