rs774873821

Variant names:

• chrX-47619516-C-A
• rs774873821
• NM_006950.3:c.213G>T

Your query was ambiguous. Multiple possible variants found:

• chrX-47619516-C-A
• chrX-47619516-C-G
• chrX-47619516-C-T

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 2P and 3B. PM2 BP4_Moderate BP7

The NM_006950.3(SYN1):​c.213G>T​(p.Ser71Ser) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. S71S) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 22)
• Consequence: SYN1 NM_006950.3 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.55
• Publications: 0 publications found

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 Gene-Disease associations (from GenCC):

• X-linked complex neurodevelopmental disorder

  Inheritance: XL Classification: DEFINITIVE Submitted by: ClinGen
• epilepsy, X-linked 1, with variable learning disabilities and behavior disorders

  Inheritance: XL Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Ambry Genetics, G2P, Laboratory for Molecular Medicine, Labcorp Genetics (formerly Invitae), Orphanet

ENSG00000283743 (HGNC:):

ACMG classification

Our verdict: Likely_benign. The variant received -1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.28).
• BP7: Synonymous conserved (PhyloP=-1.55 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SYN1	NM_006950.3	c.213G>T	p.Ser71Ser	synonymous_variant	Exon 1 of 13	ENST00000295987.13	NP_008881.2
SYN1	NM_133499.2	c.213G>T	p.Ser71Ser	synonymous_variant	Exon 1 of 13		NP_598006.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SYN1	ENST00000295987.13	c.213G>T	p.Ser71Ser	synonymous_variant	Exon 1 of 13	2	NM_006950.3	ENSP00000295987.7
SYN1	ENST00000340666.5	c.213G>T	p.Ser71Ser	synonymous_variant	Exon 1 of 13	1		ENSP00000343206.4
ENSG00000283743	ENST00000638776.2	n.2833+3574G>T		intron_variant	Intron 7 of 15	5
SYN1	ENST00000639776.1	c.-130G>T		upstream_gene_variant		3		ENSP00000492521.1

Frequencies

GnomAD3 genomes Cov.: 22

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 22

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.28
CADD	Benign	8.6
DANN	Benign	0.91
PhyloP100		-1.6
PromoterAI		0.0067	Neutral

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

Other links and lift over

dbSNP: rs774873821; hg19: chrX-47478915;