Genetic Variant NM_203446.3:c.930G>A (chr21-32686996-C-T) – ACMG Classification: Benign (-14 pts)

Variant summary

Our verdict is Benign. The variant received -14 ACMG points: 0P and 14B. BP4_StrongBP6_ModerateBS1BS2

The NM_203446.3(SYNJ1):c.930G>A(p.Met310Ile) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000917 in 1,548,390 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

Frequency

Genomes: 𝑓 0.000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000095 ( 2 hom. )

Consequence

SYNJ1
NM_203446.3 missense

Scores

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: 7.57

Publications

2 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:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -14 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.057552338).

BP6

Variant 21-32686996-C-T is Benign according to our data. Variant chr21-32686996-C-T is described in ClinVar as Likely_benign. ClinVar VariationId is 575493.Status of the report is criteria_provided_single_submitter, 1 stars.

BS1

Variant frequency is greater than expected in population sas. GnomAd4 allele frequency = 0.0000657 (10/152112) while in subpopulation SAS AF = 0.00166 (8/4826). AF 95% confidence interval is 0.000824. There are 0 homozygotes in GnomAd4. There are 7 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAdExome4 at 2 AR,AD gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_203446.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
SYNJ1	NM_203446.3	MANE Select	c.930G>A	p.Met310Ile	missense	Exon 8 of 33	NP_982271.3
SYNJ1	NM_003895.4		c.1047G>A	p.Met349Ile	missense	Exon 8 of 32	NP_003886.3
SYNJ1	NM_001160306.2		c.930G>A	p.Met310Ile	missense	Exon 8 of 28	NP_001153778.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
SYNJ1	ENST00000674351.1	MANE Select	c.930G>A	p.Met310Ile	missense	Exon 8 of 33	ENSP00000501530.1
SYNJ1	ENST00000433931.7	TSL:1	c.1047G>A	p.Met349Ile	missense	Exon 8 of 32	ENSP00000409667.2
SYNJ1	ENST00000630077.3	TSL:1	c.930G>A	p.Met310Ile	missense	Exon 8 of 28	ENSP00000487560.1

Frequencies

GnomAD3 genomes

AF:

0.0000657

AC:

AN:

152112

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00166

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000202

AC:

AN:

203030

AF XY:

0.000297

show subpopulations

Gnomad AFR exome

AF:

0.0000766

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000101

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000945

AC:

132

AN:

1396278

Hom.:

Cov.:

AF XY:

0.000140

AC XY:

AN XY:

694636

show subpopulations

African (AFR)

AF:

0.0000342

AC:

AN:

29254

American (AMR)

AF:

0.00

AC:

AN:

31340

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

24550

East Asian (EAS)

AF:

0.0000280

AC:

AN:

35696

South Asian (SAS)

AF:

0.00162

AC:

122

AN:

75386

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52966

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5622

European-Non Finnish (NFE)

AF:

0.00000369

AC:

AN:

1083672

Other (OTH)

AF:

0.0000692

AC:

AN:

57792

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.443

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000657

AC:

AN:

152112

Hom.:

Cov.:

AF XY:

0.0000942

AC XY:

AN XY:

74288

show subpopulations

African (AFR)

AF:

0.0000483

AC:

AN:

41428

American (AMR)

AF:

0.00

AC:

AN:

15266

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5188

South Asian (SAS)

AF:

0.00166

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10592

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68026

Other (OTH)

AF:

0.00

AC:

AN:

2088

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.470

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000130

Hom.:

Bravo

AF:

0.0000302

ExAC

AF:

0.000255

AC:

Asia WGS

AF:

0.000867

AC:

AN:

3476

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

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

Benign:1

Jul 18, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.89

BayesDel_addAF

Benign

-0.094

BayesDel_noAF

Uncertain

0.080

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.27

Eigen

Benign

0.18

Eigen_PC

Uncertain

0.37

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.97

M_CAP

Benign

0.053

MetaRNN

Benign

0.058

MetaSVM

Benign

-0.96

MutationAssessor

Benign

0.35

PhyloP100

7.6

PrimateAI

Uncertain

0.76

PROVEAN

Benign

-1.6

REVEL

Benign

0.27

Sift

Benign

0.12

Sift4G

Benign

0.35

Polyphen

0.92

Vest4

0.78

MutPred

0.52

Loss of ubiquitination at K313 (P = 0.0483)

MVP

0.53

MPC

1.4

ClinPred

0.13

GERP RS

5.8

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

gMVP

0.46

Mutation Taster

=97/3

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over