chr21-32657831-C-T

Variant names:

Variant summary

Our verdict is Benign. Variant got -13 ACMG points: 2P and 15B. PM2BP4_ModerateBP6_Very_StrongBP7BS1

The NM_203446.3(SYNJ1):c.2346G>A(p.Pro782Pro) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00113 in 1,613,830 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.00083 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0012 ( 0 hom. )

Consequence

SYNJ1
NM_203446.3 synonymous

Scores

Clinical Significance

Likely benign criteria provided, multiple submitters, no conflicts B:5

Conservation

PhyloP100: -1.32

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 Benign. Variant got -13 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.46).

BP6

Variant 21-32657831-C-T is Benign according to our data. Variant chr21-32657831-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 478333.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr21-32657831-C-T is described in Lovd as [Likely_benign].

BP7

Synonymous conserved (PhyloP=-1.33 with no splicing effect.

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.000828 (126/152256) while in subpopulation NFE AF= 0.00148 (101/68020). AF 95% confidence interval is 0.00125. There are 0 homozygotes in gnomad4. There are 55 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SYNJ1	NM_203446.3 link	c.2346G>A	p.Pro782Pro	synonymous_variant	Exon 19 of 33	ENST00000674351.1	NP_982271.3	O43426-2C9JFZ1Q05CZ1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SYNJ1	ENST00000674351.1 link	c.2346G>A	p.Pro782Pro	synonymous_variant	Exon 19 of 33		NM_203446.3	ENSP00000501530.1		O43426-2

Frequencies

GnomAD3 genomes

AF:

0.000828

AC:

126

AN:

152138

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000362

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.000660

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00148

Gnomad OTH

AF:

0.000957

GnomAD3 exomes

AF:

0.000792

AC:

199

AN:

251118

Hom.:

AF XY:

0.000840

AC XY:

114

AN XY:

135748

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000203

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00111

Gnomad NFE exome

AF:

0.00144

Gnomad OTH exome

AF:

0.000653

GnomAD4 exome

AF:

0.00116

AC:

1694

AN:

1461574

Hom.:

Cov.:

AF XY:

0.00112

AC XY:

814

AN XY:

727098

show subpopulations

Gnomad4 AFR exome

AF:

0.000120

Gnomad4 AMR exome

AF:

0.000202

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00107

Gnomad4 NFE exome

AF:

0.00142

Gnomad4 OTH exome

AF:

0.000828

GnomAD4 genome

AF:

0.000828

AC:

126

AN:

152256

Hom.:

Cov.:

AF XY:

0.000739

AC XY:

AN XY:

74454

show subpopulations

Gnomad4 AFR

AF:

0.000361

Gnomad4 AMR

AF:

0.0000654

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.000660

Gnomad4 NFE

AF:

0.00148

Gnomad4 OTH

AF:

0.000947

Alfa

AF:

0.000975

Hom.:

Bravo

AF:

0.000703

EpiCase

AF:

0.00120

EpiControl

AF:

0.00101

ClinVar

Significance: Likely benign

Submissions summary: Benign:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:4

May 29, 2020

GeneDx

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Genome Diagnostics Laboratory, University Medical Center Utrecht

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Oct 01, 2024

CeGaT Center for Human Genetics Tuebingen

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

SYNJ1: BP4, BP7 -

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

Benign:1

Feb 04, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.46

CADD

Benign

2.1

DANN

Benign

0.72

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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

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