Variant 12-79292017-G-A details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 3P and 2B. PM2PP2BP4_Moderate

The NM_005639.3(SYT1):c.361G>A(p.Asp121Asn) 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 benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Consequence

SYT1
NM_005639.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.65

Variant links:

Genes affected

SYT1 (HGNC:11509): (synaptotagmin 1) This gene encodes a member of the synaptotagmin protein family. The synaptotagmins are integral membrane proteins of synaptic vesicles that serve as calcium sensors in the process of vesicular trafficking and exocytosis. The encoded protein participates in triggering neurotransmitter release at the synapse in response to calcium binding. Mutations in this gene are associated with Baker-Gordon syndrome. [provided by RefSeq, Jan 2023]

SYT1 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP2

Missense variant in gene, where missense usually causes diseases (based on misZ statistic), SYT1. . Gene score misZ 2.8351 (greater than the threshold 3.09). Trascript score misZ 4.0021 (greater than threshold 3.09). GenCC has associacion of gene with intellectual disability, autosomal dominant 40, infantile hypotonia-oculomotor anomalies-hyperkinetic movements-developmental delay syndrome.

BP4

Computational evidence support a benign effect (MetaRNN=0.24399048).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SYT1	NM_005639.3 linkuse as main transcript	c.361G>A	p.Asp121Asn	missense_variant	6/11	ENST00000261205.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SYT1	ENST00000261205.9 linkuse as main transcript	c.361G>A	p.Asp121Asn	missense_variant	6/11	1	NM_005639.3	P3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

Cov.:

GnomAD4 genome

Cov.:

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

Oct 06, 2022

The c.361G>A (p.D121N) alteration is located in exon 7 (coding exon 3) of the SYT1 gene. This alteration results from a G to A substitution at nucleotide position 361, causing the aspartic acid (D) at amino acid position 121 to be replaced by an asparagine (N). This variant was not reported in population-based cohorts in the Genome Aggregation Database (gnomAD). This amino acid position is well conserved in available vertebrate species. This alteration is predicted to be tolerated by in silico analysis. 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

0.28

BayesDel_addAF

Benign

-0.19

BayesDel_noAF

Benign

-0.51

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.71

D;D;.;D;T;T

Eigen

Uncertain

0.22

Eigen_PC

Uncertain

0.34

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Benign

0.62

.;.;T;D;T;D

M_CAP

Benign

0.011

MetaRNN

Benign

0.24

T;T;T;T;T;T

MetaSVM

Benign

-0.99

MutationAssessor

Uncertain

2.7

M;M;.;M;.;.

MutationTaster

Benign

1.0

D;D;D;D

PrimateAI

Pathogenic

0.82

PROVEAN

Benign

-2.1

N;N;N;N;N;D

REVEL

Benign

0.055

Sift

Uncertain

0.016

D;D;T;D;T;D

Sift4G

Benign

0.11

T;T;T;T;T;D

Polyphen

0.44

B;B;.;B;.;.

Vest4

0.20

MutPred

0.26

Gain of methylation at K120 (P = 0.0752);Gain of methylation at K120 (P = 0.0752);.;Gain of methylation at K120 (P = 0.0752);.;Gain of methylation at K120 (P = 0.0752);

MVP

0.41

MPC

0.27

ClinPred

0.92

GERP RS

4.7

Varity_R

0.068

gMVP

0.31

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

No publications associated with this variant yet.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over