rs185246578

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PM2PP3_ModeratePP5_Very_Strong

The NM_001128126.3(AP4S1):c.295-3C>A variant causes a splice region, splice polypyrimidine tract, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000124 in 1,611,426 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 2/2 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Likely pathogenic (★★).

Frequency

Genomes: 𝑓 0.000033 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000010 ( 0 hom. )

Consequence

AP4S1
NM_001128126.3 splice_region, splice_polypyrimidine_tract, intron

Scores

Splicing: ADA: 0.9998

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:5U:1

Conservation

PhyloP100: 3.11

Variant links:

Genes affected

AP4S1 (HGNC:575): (adaptor related protein complex 4 subunit sigma 1) This gene encodes a member of the adaptor complexes small subunit protein family. These proteins are components of the heterotetrameric adaptor protein complexes, which play important roles in the secretory and endocytic pathways by mediating vesicle formation and sorting of integral membrane proteins. The encoded protein is the small subunit of adaptor protein complex-4, which is associated with both clathrin- and nonclathrin-coated vesicles. Mutations in this gene are associated with spastic quadriplegic cerebral palsy-6. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene, and a pseudogene of this gene is located on the long arm of chromosome 6. [provided by RefSeq, Dec 2011]

AP4S1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 12 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

Splicing scoreres supports a deletorius effect: Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF. No scorers claiming Uncertain. No scorers claiming Benign.

PP5

Variant 14-31080570-C-A is Pathogenic according to our data. Variant chr14-31080570-C-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 210218.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr14-31080570-C-A is described in Lovd as [Likely_pathogenic]. Variant chr14-31080570-C-A is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
AP4S1	NM_001128126.3 linkuse as main transcript	c.295-3C>A		splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant		ENST00000542754.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
AP4S1	ENST00000542754.7 linkuse as main transcript	c.295-3C>A		splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant		1	NM_001128126.3	P1	Q9Y587-1

Frequencies

GnomAD3 genomes

AF:

0.0000329

AC:

AN:

152146

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000724

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.000479

GnomAD3 exomes

AF:

0.0000119

AC:

AN:

251170

Hom.:

AF XY:

0.0000221

AC XY:

AN XY:

135782

show subpopulations

Gnomad AFR exome

AF:

0.000185

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000103

AC:

AN:

1459162

Hom.:

Cov.:

AF XY:

0.0000110

AC XY:

AN XY:

726066

show subpopulations

Gnomad4 AFR exome

AF:

0.000299

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:

0.0000663

GnomAD4 genome

AF:

0.0000328

AC:

AN:

152264

Hom.:

Cov.:

AF XY:

0.0000403

AC XY:

AN XY:

74440

show subpopulations

Gnomad4 AFR

AF:

0.0000722

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.000474

Bravo

AF:

0.0000113

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:5Uncertain:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Spastic paraplegia

Pathogenic:2

Pathogenic, criteria provided, single submitter	clinical testing	Invitae	Jan 15, 2024	This sequence change falls in intron 4 of the AP4S1 gene. It does not directly change the encoded amino acid sequence of the AP4S1 protein. It affects a nucleotide within the consensus splice site. This variant is present in population databases (rs185246578, gnomAD 0.02%). This variant has been observed in individuals with clinical features of hereditary spastic paraplegia (PMID: 26297806, 31660686). It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 210218). Variants that disrupt the consensus splice site are a relatively common cause of aberrant splicing (PMID: 17576681, 9536098). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. For these reasons, this variant has been classified as Pathogenic. -
Likely pathogenic, no assertion criteria provided	literature only	Yale Center for Mendelian Genomics, Yale University	Oct 01, 2020	- -

Spastic paraplegia 52, autosomal recessive

Pathogenic:2

Likely pathogenic, criteria provided, single submitter	clinical testing	Genetics and Molecular Pathology, SA Pathology	Nov 10, 2021	- -
Likely pathogenic, criteria provided, single submitter	clinical testing;research	Tgen's Center For Rare Childhood Disorders, Translational Genomics Research Institute (TGEN)	-	- -

not provided

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

GeneDx

Apr 07, 2022

Published RNA/functional studies demonstrate a damaging effect (McCullough et al., 2020); This variant is associated with the following publications: (PMID: 32056211, 26297806, 31660686, 17576681, 32979048) -

not specified

Uncertain:1

Uncertain significance, flagged submission

clinical testing

Genetic Services Laboratory, University of Chicago

Mar 19, 2015

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.21

Cadd

Benign

Dann

Benign

0.95

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Pathogenic

1.0

dbscSNV1_RF

Pathogenic

0.83

SpliceAI score (max)

0.82

Details are displayed if max score is > 0.2

DS_AL_spliceai

0.82

Position offset: 3

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