6-152416996-T-C

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BP4_Strong

The NM_182961.4(SYNE1):c.5441A>G(p.Glu1814Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000849 in 1,614,206 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000087 ( 0 hom. )

Consequence

SYNE1
NM_182961.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:5

Conservation

PhyloP100: 2.00

Publications

3 publications found

Variant links:

Genes affected

SYNE1 (HGNC:17089): (spectrin repeat containing nuclear envelope protein 1) This gene encodes a spectrin repeat containing protein expressed in skeletal and smooth muscle, and peripheral blood lymphocytes, that localizes to the nuclear membrane. Mutations in this gene have been associated with autosomal recessive spinocerebellar ataxia 8, also referred to as autosomal recessive cerebellar ataxia type 1 or recessive ataxia of Beauce. Alternatively spliced transcript variants encoding different isoforms have been described. [provided by RefSeq, Jul 2008]

SYNE1 Gene-Disease associations (from GenCC):

autosomal recessive ataxia, Beauce type
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Ambry Genetics, G2P, Orphanet, Laboratory for Molecular Medicine, Labcorp Genetics (formerly Invitae)
arthrogryposis multiplex congenita 3, myogenic type
Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
Emery-Dreifuss muscular dystrophy 4, autosomal dominant
Inheritance: AD Classification: MODERATE, LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), Illumina
autosomal dominant Emery-Dreifuss muscular dystrophy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
autosomal recessive myogenic arthrogryposis multiplex congenita
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

SYNE1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -4 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.050115466).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SYNE1	NM_182961.4 link	c.5441A>G	p.Glu1814Gly	missense_variant	Exon 41 of 146	ENST00000367255.10	NP_892006.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
SYNE1	ENST00000367255.10 link	c.5441A>G	p.Glu1814Gly	missense_variant	Exon 41 of 146	1	NM_182961.4	ENSP00000356224.5	Q8NF91-1
SYNE1	ENST00000423061.6 link	c.5462A>G	p.Glu1821Gly	missense_variant	Exon 41 of 146	1		ENSP00000396024.1	A0A0C4DG40
SYNE1	ENST00000461872.6 link	n.5659A>G		non_coding_transcript_exon_variant	Exon 39 of 55	1

Frequencies

GnomAD3 genomes

AF:

0.0000723

AC:

AN:

152238

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.0000882

Gnomad OTH

AF:

0.000958

GnomAD2 exomes

AF:

0.000131

AC:

AN:

251028

AF XY:

0.000170

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000132

Gnomad OTH exome

AF:

0.000490

GnomAD4 exome

AF:

0.0000869

AC:

127

AN:

1461850

Hom.:

Cov.:

AF XY:

0.000122

AC XY:

AN XY:

727224

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.000580

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53378

Middle Eastern (MID)

AF:

0.000693

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000576

AC:

AN:

1112010

Other (OTH)

AF:

0.000149

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.473

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000656

AC:

AN:

152356

Hom.:

Cov.:

AF XY:

0.0000403

AC XY:

AN XY:

74508

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41586

American (AMR)

AF:

0.0000653

AC:

AN:

15310

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5182

South Asian (SAS)

AF:

0.000207

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10626

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000882

AC:

AN:

68036

Other (OTH)

AF:

0.000948

AC:

AN:

2110

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.493

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.0000999

Hom.:

Bravo

AF:

0.0000302

ExAC

AF:

0.000165

AC:

EpiCase

AF:

0.000164

EpiControl

AF:

0.000237

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:3

Nov 06, 2015

Eurofins Ntd Llc (ga)

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

May 01, 2016

CeGaT Center for Human Genetics Tuebingen

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Dec 30, 2017

Athena Diagnostics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not specified

Uncertain:1

Jun 20, 2024

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Variant summary: SYNE1 c.5462A>G (p.Glu1821Gly) results in a non-conservative amino acid change in the encoded protein sequence. Three of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 0.00013 in 251028 control chromosomes. This frequency is not significantly higher than estimated for a pathogenic variant in SYNE1 causing SYNE1-Related Disorders, allowing no conclusion about variant significance. c.5462A>G has been reported in the literature in at least one homozygous individual affected with spastic paraplegia and ataxia with other clinical features who carried at least one other variant related to the phenotype in the homozygous state (e.g. Inan_2023). This report does not provide unequivocal conclusions about association of the variant with SYNE1-Related Disorders. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. The following publication has been ascertained in the context of this evaluation (PMID: 35789476). ClinVar contains an entry for this variant (Variation ID: 284690). Based on the evidence outlined above, the variant was classified as uncertain significance. -

Autosomal recessive ataxia, Beauce type;C2751807:Emery-Dreifuss muscular dystrophy 4, autosomal dominant

Uncertain:1

Jul 06, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces glutamic acid, which is acidic and polar, with glycine, which is neutral and non-polar, at codon 1821 of the SYNE1 protein (p.Glu1821Gly). This variant is present in population databases (rs557081125, gnomAD 0.05%). This variant has not been reported in the literature in individuals affected with SYNE1-related conditions. ClinVar contains an entry for this variant (Variation ID: 284690). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C65"). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.093

BayesDel_addAF

Benign

-0.47

BayesDel_noAF

Benign

-0.58

CADD

Benign

(source)

DANN

Benign

0.55

DEOGEN2

Uncertain

0.62

D;.;T

Eigen

Benign

-0.74

Eigen_PC

Benign

-0.74

FATHMM_MKL

Benign

0.55

LIST_S2

Benign

0.69

T;T;T

M_CAP

Benign

0.011

MetaRNN

Benign

0.050

T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Uncertain

2.5

M;.;.

PhyloP100

2.0

PrimateAI

Benign

0.37

PROVEAN

Uncertain

-2.8

D;.;D

REVEL

Benign

0.029

Sift

Uncertain

0.0050

D;.;D

Sift4G

Uncertain

0.016

D;D;D

Polyphen

0.38

B;.;.

Vest4

0.16

MVP

0.29

MPC

0.18

ClinPred

0.078

GERP RS

2.3

Varity_R

0.11

gMVP

0.097

Mutation Taster

=94/6

polymorphism

(source)

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over