rs1060499619

Variant names:

• chr21-32681590-C-G
• rs1060499619
• NM_203446.3:c.1259G>C
• SYNJ1 p.Arg420Pro

Your query was ambiguous. Multiple possible variants found:

• chr21-32681590-C-G
• chr21-32681590-C-T

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2 PP3 PP5

The NM_203446.3(SYNJ1):​c.1259G>C​(p.Arg420Pro) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R420C) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: SYNJ1 NM_203446.3 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 7.86
• Publications: 25 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: Labcorp Genetics (formerly Invitae), Ambry Genetics, PanelApp Australia
• early-onset Parkinson disease 20

  Inheritance: AR Classification: STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, Genomics England PanelApp, 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: Uncertain_significance. The variant received 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.81
• PP5: Variant 21-32681590-C-G is Pathogenic according to our data. Variant chr21-32681590-C-G is described in ClinVar as Pathogenic. ClinVar VariationId is 393356.Status of the report is no_assertion_criteria_provided, 0 stars.

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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SYNJ1	NM_203446.3	MANE Select	c.1259G>C	p.Arg420Pro	missense	Exon 11 of 33	NP_982271.3	O43426-2
	SYNJ1	NM_003895.4		c.1376G>C	p.Arg459Pro	missense	Exon 11 of 32	NP_003886.3
	SYNJ1	NM_001160306.2		c.1259G>C	p.Arg420Pro	missense	Exon 11 of 28	NP_001153778.1	A0A0D9SGJ6

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SYNJ1	ENST00000674351.1	MANE Select	c.1259G>C	p.Arg420Pro	missense	Exon 11 of 33	ENSP00000501530.1	O43426-2
	SYNJ1	ENST00000630077.3	TSL:1	c.1259G>C	p.Arg420Pro	missense	Exon 11 of 28	ENSP00000487560.1	A0A0D9SGJ6
	SYNJ1	ENST00000429236.5	TSL:1	c.1259G>C	p.Arg420Pro	missense	Exon 11 of 16	ENSP00000413649.1	C9JW66

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
1	-	-	Early-onset Parkinson disease 20 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.26	D
BayesDel_noAF	Uncertain	0.13
CADD	Pathogenic	29
DANN	Uncertain	1.0
DEOGEN2	Benign	0.40	T
Eigen	Pathogenic	0.82
Eigen_PC	Pathogenic	0.83
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.97	D
M_CAP	Benign	0.052	D
MetaRNN	Pathogenic	0.81	D
MetaSVM	Benign	-0.92	T
MutationAssessor	Benign	1.4	L
PhyloP100		7.9
PrimateAI	Pathogenic	0.82	D
PROVEAN	Pathogenic	-6.4	D
REVEL	Uncertain	0.61
Sift	Uncertain	0.0010	D
Sift4G	Uncertain	0.0020	D
gMVP		0.91
Mutation Taster		=1/99	disease causing (ClinVar)

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: rs1060499619; hg19: chr21-34053900;