Genetic Variant SYNJ1:p.Ser519Arg (chr21-32673511-T-G) – ACMG Classification: Uncertain_significance (1 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2BP4

The NM_203446.3(SYNJ1):c.1555A>C(p.Ser519Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000686 in 1,458,232 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign 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. S519G) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

SYNJ1
NM_203446.3 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 2.91

Publications

0 publications found

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 Gene-Disease associations (from GenCC):

genetic developmental and epileptic encephalopathy
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
developmental and epileptic encephalopathy, 53
Inheritance: AR Classification: STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics
early-onset Parkinson disease 20
Inheritance: AR Classification: STRONG, MODERATE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), Genomics England PanelApp
undetermined early-onset epileptic encephalopathy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
atypical juvenile parkinsonism
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
young-onset Parkinson disease
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

SYNJ1 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.3690979).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SYNJ1	NM_203446.3 link	c.1555A>C	p.Ser519Arg	missense_variant	Exon 14 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.1555A>C	p.Ser519Arg	missense_variant	Exon 14 of 33		NM_203446.3	ENSP00000501530.1		O43426-2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.86e-7

AC:

AN:

1458232

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

725454

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33308

American (AMR)

AF:

0.00

AC:

AN:

44046

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26034

East Asian (EAS)

AF:

0.00

AC:

AN:

39482

South Asian (SAS)

AF:

0.0000117

AC:

AN:

85586

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53334

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5754

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1110490

Other (OTH)

AF:

0.00

AC:

AN:

60198

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

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

Uncertain

0.34

BayesDel_addAF

Uncertain

0.16

BayesDel_noAF

Uncertain

-0.010

CADD

Benign

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.32

.;T;.;T;T;.

Eigen

Benign

0.18

Eigen_PC

Uncertain

0.29

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Uncertain

0.93

D;D;D;D;D;D

M_CAP

Uncertain

0.18

MetaRNN

Benign

0.37

T;T;T;T;T;T

MetaSVM

Pathogenic

0.83

MutationAssessor

Benign

1.6

L;.;.;.;.;.

PhyloP100

2.9

PrimateAI

Uncertain

0.60

PROVEAN

Benign

-1.9

N;N;.;N;N;N

REVEL

Uncertain

0.47

Sift

Benign

0.078

T;T;.;T;T;T

Sift4G

Benign

0.46

T;T;T;T;T;.

Polyphen

0.99

D;.;.;B;.;.

Vest4

0.41

MutPred

0.40

Gain of MoRF binding (P = 0.0106);.;.;.;.;.;

MVP

0.92

MPC

1.1

ClinPred

0.83

GERP RS

5.3

gMVP

0.69

Mutation Taster

=78/22

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over