Genetic Variant NM_004711.5:c.220G>A (chr22-39374436-G-A) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

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

The NM_004711.5(SYNGR1):c.220G>A(p.Val74Met) variant causes a missense change. The variant allele was found at a frequency of 0.000154 in 1,613,966 control chromosomes in the GnomAD database, with no homozygous occurrence. 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 0.00027 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00014 ( 0 hom. )

Consequence

SYNGR1
NM_004711.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.21

Variant links:

Genes affected

SYNGR1 (HGNC:11498): (synaptogyrin 1) This gene encodes an integral membrane protein associated with presynaptic vesicles in neuronal cells. The exact function of this protein is unclear, but studies of a similar murine protein suggest that it functions in synaptic plasticity without being required for synaptic transmission. The gene product belongs to the synaptogyrin gene family. Three alternatively spliced variants encoding three different isoforms have been identified. [provided by RefSeq, Jul 2008]

SYNGR1 links:

Genome browser will be placed here

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=0.14992806).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SYNGR1	NM_004711.5 link	c.220G>A	p.Val74Met	missense_variant	Exon 2 of 4	ENST00000328933.10	NP_004702.2	O43759-1
SYNGR1	NM_145738.3 link	c.223G>A	p.Val75Met	missense_variant	Exon 2 of 4		NP_663791.1	O43759-3
SYNGR1	NM_145731.4 link	c.220G>A	p.Val74Met	missense_variant	Exon 2 of 4		NP_663783.1	O43759-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SYNGR1	ENST00000328933.10 link	c.220G>A	p.Val74Met	missense_variant	Exon 2 of 4	1	NM_004711.5	ENSP00000332287.5		O43759-1

Frequencies

GnomAD3 genomes

AF:

0.000269

AC:

AN:

152202

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000482

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000192

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000265

Gnomad OTH

AF:

0.000479

GnomAD3 exomes

AF:

0.000155

AC:

AN:

251092

Hom.:

AF XY:

0.000125

AC XY:

AN XY:

135820

show subpopulations

Gnomad AFR exome

AF:

0.000308

Gnomad AMR exome

AF:

0.0000868

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000109

Gnomad SAS exome

AF:

0.0000980

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000229

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000142

AC:

208

AN:

1461646

Hom.:

Cov.:

AF XY:

0.000144

AC XY:

105

AN XY:

727134

show subpopulations

Gnomad4 AFR exome

AF:

0.000149

Gnomad4 AMR exome

AF:

0.000112

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000756

Gnomad4 SAS exome

AF:

0.0000927

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000163

Gnomad4 OTH exome

AF:

0.0000993

GnomAD4 genome

AF:

0.000269

AC:

AN:

152320

Hom.:

Cov.:

AF XY:

0.000269

AC XY:

AN XY:

74476

show subpopulations

Gnomad4 AFR

AF:

0.000481

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000193

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000265

Gnomad4 OTH

AF:

0.000474

Alfa

AF:

0.0211

Hom.:

2250

Bravo

AF:

0.000272

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000349

AC:

ExAC

AF:

0.000157

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.0000545

EpiControl

AF:

0.000296

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Dec 21, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.220G>A (p.V74M) alteration is located in exon 2 (coding exon 2) of the SYNGR1 gene. This alteration results from a G to A substitution at nucleotide position 220, causing the valine (V) at amino acid position 74 to be replaced by a methionine (M). 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

0.22

BayesDel_addAF

Benign

-0.37

BayesDel_noAF

Benign

-0.45

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Benign

0.20

.;.;.;T;.

Eigen

Benign

0.064

Eigen_PC

Benign

0.16

FATHMM_MKL

Uncertain

0.82

LIST_S2

Uncertain

0.87

D;D;D;T;D

M_CAP

Benign

0.014

MetaRNN

Benign

0.15

T;T;T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

0.66

N;.;.;N;.

PROVEAN

Benign

-1.1

N;N;N;N;N

REVEL

Benign

0.077

Sift

Benign

0.092

T;T;T;T;T

Sift4G

Benign

0.13

T;T;T;T;T

Polyphen

0.70

P;.;.;P;P

Vest4

0.35

MVP

0.10

MPC

0.37

ClinPred

0.018

GERP RS

4.2

Varity_R

0.13

gMVP

0.75

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