21-32673531-G-A

Position:

chr21-32673531-G-A

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 3P and 5B. PM2PP3BP6BS1

The NM_203446.3(SYNJ1):c.1535C>T(p.Ala512Val) variant causes a missense, splice region change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000939 in 1,597,650 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 2/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.000072 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000096 ( 1 hom. )

Consequence

SYNJ1
NM_203446.3 missense, splice_region

Scores

Splicing: ADA: 0.9853

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:2

Conservation

PhyloP100: 7.77

Variant links:

Genes affected

SYNJ1 (HGNC:11503): (synaptojanin 1) This gene encodes a phosphoinositide phosphatase that regulates levels of membrane phosphatidylinositol-4,5-bisphosphate. As such, expression of this enzyme may affect synaptic transmission and membrane trafficking. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Sep 2011]

SYNJ1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 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. Scorers claiming Uncertain: max_spliceai. No scorers claiming Benign.

BP6

Variant 21-32673531-G-A is Benign according to our data. Variant chr21-32673531-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 544579.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=2, Uncertain_significance=1}.

BS1

Variant frequency is greater than expected in population eas. gnomad4 allele frequency = 0.0000722 (11/152258) while in subpopulation EAS AF= 0.00212 (11/5182). AF 95% confidence interval is 0.00119. There are 0 homozygotes in gnomad4. There are 5 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SYNJ1	NM_203446.3 linkuse as main transcript	c.1535C>T	p.Ala512Val	missense_variant, splice_region_variant	14/33	ENST00000674351.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SYNJ1	ENST00000674351.1 linkuse as main transcript	c.1535C>T	p.Ala512Val	missense_variant, splice_region_variant	14/33		NM_203446.3		O43426-2

Frequencies

GnomAD3 genomes

AF:

0.0000723

AC:

AN:

152140

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00212

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000347

AC:

AN:

236488

Hom.:

AF XY:

0.000328

AC XY:

AN XY:

128172

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.000104

Gnomad EAS exome

AF:

0.00468

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:

0.0000962

AC:

139

AN:

1445392

Hom.:

Cov.:

AF XY:

0.000104

AC XY:

AN XY:

718698

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000238

Gnomad4 ASJ exome

AF:

0.0000781

Gnomad4 EAS exome

AF:

0.00285

Gnomad4 SAS exome

AF:

0.0000479

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000181

Gnomad4 OTH exome

AF:

0.000302

GnomAD4 genome

AF:

0.0000722

AC:

AN:

152258

Hom.:

Cov.:

AF XY:

0.0000671

AC XY:

AN XY:

74462

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00212

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000676

Hom.:

Bravo

AF:

0.000276

ExAC

AF:

0.000362

AC:

Asia WGS

AF:

0.000577

AC:

AN:

3478

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:2

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:1Benign:1

Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Jul 01, 2022	In silico analysis supports that this missense variant does not alter protein structure/function; In-silico analysis is inconclusive as to whether the variant alters gene splicing. In the absence of RNA/functional studies, the actual effect of this sequence change is unknown.; Reported along with a second variant in the SYNJ1 gene in a patient with Parkinson disease in the published literature; however, segregation information was not provided (Li et al., 2020); This variant is associated with the following publications: (PMID: 32171587, 34426522, 26149920, 30788857) -
Likely benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -

Early-onset Parkinson disease 20;C4479313:Developmental and epileptic encephalopathy, 53

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 06, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Benign

-0.0056

BayesDel_noAF

Pathogenic

0.22

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.27

.;T;.;T;T;.

Eigen

Uncertain

0.38

Eigen_PC

Uncertain

0.48

FATHMM_MKL

Pathogenic

1.0

LIST_S2

Uncertain

0.94

D;T;T;D;D;T

M_CAP

Uncertain

0.16

MetaRNN

Benign

0.011

T;T;T;T;T;T

MetaSVM

Uncertain

0.70

MutationAssessor

Benign

1.6

L;.;.;.;.;.

MutationTaster

Benign

1.0

D;D;D;D;D

PrimateAI

Uncertain

0.72

PROVEAN

Benign

-1.8

N;N;.;N;N;N

REVEL

Uncertain

0.50

Sift

Uncertain

0.020

D;T;.;D;T;T

Sift4G

Benign

0.13

T;T;T;T;T;.

Polyphen

0.82

P;.;.;B;.;.

Vest4

0.43

MVP

0.91

MPC

0.99

ClinPred

0.15

GERP RS

5.3

gMVP

0.70

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Pathogenic

0.99

dbscSNV1_RF

Pathogenic

0.76

SpliceAI score (max)

0.25

Details are displayed if max score is > 0.2

DS_AL_spliceai

0.25

Position offset: 0

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