rs373152478

Positions:

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_006950.3(SYN1):c.581G>T(p.Arg194Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000892 in 112,081 control chromosomes in the GnomAD database, with no homozygous occurrence. There are no hemizygote samples in GnomAD. In-silico tool predicts a benign outcome for this variant. 12/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000089 ( 0 hom., 0 hem., cov: 23)

Consequence

SYN1
NM_006950.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.842

Variant links:

Genes affected

SYN1 (HGNC:11494): (synapsin I) This gene is a member of the synapsin gene family. Synapsins encode neuronal phosphoproteins which associate with the cytoplasmic surface of synaptic vesicles. Family members are characterized by common protein domains, and they are implicated in synaptogenesis and the modulation of neurotransmitter release, suggesting a potential role in several neuropsychiatric diseases. This member of the synapsin family plays a role in regulation of axonogenesis and synaptogenesis. The protein encoded serves as a substrate for several different protein kinases and phosphorylation may function in the regulation of this protein in the nerve terminal. Mutations in this gene may be associated with X-linked disorders with primary neuronal degeneration such as Rett syndrome. Alternatively spliced transcript variants encoding different isoforms have been identified. [provided by RefSeq, Jul 2008]

SYN1 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.15506437).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SYN1	NM_006950.3 linkuse as main transcript	c.581G>T	p.Arg194Leu	missense_variant	4/13	ENST00000295987.13	NP_008881.2
SYN1	NM_133499.2 linkuse as main transcript	c.581G>T	p.Arg194Leu	missense_variant	4/13		NP_598006.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SYN1	ENST00000295987.13 linkuse as main transcript	c.581G>T	p.Arg194Leu	missense_variant	4/13	2	NM_006950.3	ENSP00000295987	P3	P17600-1
SYN1	ENST00000340666.5 linkuse as main transcript	c.581G>T	p.Arg194Leu	missense_variant	4/13	1		ENSP00000343206	A1	P17600-2
SYN1	ENST00000639776.1 linkuse as main transcript	c.242G>T	p.Arg81Leu	missense_variant	4/6	3		ENSP00000492521
SYN1	ENST00000638337.1 linkuse as main transcript	n.124G>T		non_coding_transcript_exon_variant	2/3	2

Frequencies

GnomAD3 genomes

AF:

0.00000892

AC:

AN:

112081

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

34229

show subpopulations

Gnomad AFR

AF:

0.0000324

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000554

AC:

AN:

180531

Hom.:

AF XY:

0.00

AC XY:

AN XY:

65173

show subpopulations

Gnomad AFR exome

AF:

0.0000772

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

Cov.:

GnomAD4 genome

AF:

0.00000892

AC:

AN:

112081

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

34229

show subpopulations

Gnomad4 AFR

AF:

0.0000324

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000756

ESP6500AA

AF:

0.000261

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 30, 2024

The c.581G>T (p.R194L) alteration is located in exon 4 (coding exon 4) of the SYN1 gene. This alteration results from a G to T substitution at nucleotide position 581, causing the arginine (R) at amino acid position 194 to be replaced by a leucine (L). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.27

BayesDel_addAF

Benign

-0.23

BayesDel_noAF

Benign

-0.57

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.33

T;.

FATHMM_MKL

Benign

0.35

LIST_S2

Benign

0.79

T;T

M_CAP

Uncertain

0.27

MetaRNN

Benign

0.16

T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

-0.12

N;N

MutationTaster

Benign

1.0

D;D

PrimateAI

Benign

0.44

PROVEAN

Benign

-1.9

N;N

REVEL

Benign

0.14

Sift

Benign

0.45

T;T

Sift4G

Benign

0.32

T;T

Polyphen

0.013

B;P

Vest4

0.39

MVP

0.33

MPC

0.85

ClinPred

0.16

GERP RS

5.4

Varity_R

0.30

gMVP

0.92

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

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