ENST00000630077.3:c.4511G>A

Variant names:

• chr21-32631065-C-T
• rs752303366
• ENST00000630077.3:c.4511G>A
• SYNJ1 p.Ser1504Asn

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The ENST00000630077.3(SYNJ1):​c.4511G>A​(p.Ser1504Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,818 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. S1504S) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: SYNJ1 ENST00000630077.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.413
• Publications: 0 publications found

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: Ambry Genetics, Labcorp Genetics (formerly Invitae), PanelApp Australia
• early-onset Parkinson disease 20

  Inheritance: AR Classification: STRONG, MODERATE Submitted by: Ambry Genetics, Genomics England PanelApp, Labcorp Genetics (formerly Invitae), PanelApp Australia
• 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

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.06657642).

Variant Effect in Transcripts

ACMG analysis was done for transcript: ENST00000630077.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SYNJ1	NM_203446.3	MANE Select	c.*740G>A		3_prime_UTR	Exon 33 of 33	NP_982271.3	O43426-2
	SYNJ1	NM_003895.4		c.4769G>A	p.Ser1590Asn	missense	Exon 32 of 32	NP_003886.3
	SYNJ1	NM_001160306.2		c.4511G>A	p.Ser1504Asn	missense	Exon 28 of 28	NP_001153778.1	A0A0D9SGJ6

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SYNJ1	ENST00000630077.3	TSL:1	c.4511G>A	p.Ser1504Asn	missense	Exon 28 of 28	ENSP00000487560.1	A0A0D9SGJ6
	SYNJ1	ENST00000674351.1	MANE Select	c.*740G>A		3_prime_UTR	Exon 33 of 33	ENSP00000501530.1	O43426-2
	SYNJ1	ENST00000674308.1		c.4652G>A	p.Ser1551Asn	missense	Exon 32 of 32	ENSP00000501426.1	O43426-1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD2 exomes AF: 0.00000398 AC: 1 AN: 251270 AF XY: 0.00000736

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000289

Gnomad ASJ exome AF: 0.00

Gnomad EAS 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: 6.84e-7 AC: 1 AN: 1461818 Hom.: 0 Cov.: 30 AF XY: 0.00000138 AC XY: 1 AN XY: 727220

African (AFR) AF: 0.00 AC: 0 AN: 33478

American (AMR) AF: 0.0000224 AC: 1 AN: 44720

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26128

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86254

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53390

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5766

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111988

Other (OTH) AF: 0.00 AC: 0 AN: 60394

GnomAD4 genome Cov.: 33

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Early-onset Parkinson disease 20;C4479313:Developmental and epileptic encephalopathy, 53 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.12
BayesDel_addAF	Benign	-0.37	T
BayesDel_noAF	Benign	-0.68
CADD	Benign	8.8
DANN	Benign	0.96
DEOGEN2	Benign	0.23	T
Eigen	Benign	-0.74
Eigen_PC	Benign	-0.68
FATHMM_MKL	Benign	0.067	N
LIST_S2	Benign	0.59	T
M_CAP	Benign	0.0038	T
MetaRNN	Benign	0.067	T
MetaSVM	Benign	-1.0	T
PhyloP100		0.41
PrimateAI	Benign	0.31	T
PROVEAN	Benign	-0.40	N
REVEL	Benign	0.077
Sift	Benign	0.077	T
Sift4G	Benign	0.67	T
gMVP		0.085
Mutation Taster		=99/1	polymorphism

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

dbSNP: rs752303366;

hg19: chr21-34003375;