14-64017631-G-A

Variant names:

• chr14-64017631-G-A
• rs1555431607
• NM_182914.3:c.4924G>A

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_182914.3(SYNE2):​c.4924G>A​(p.Gly1642Ser) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 13/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: SYNE2 NM_182914.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.59
• Publications: 0 publications found

Genes affected

SYNE2 (HGNC:17084): (spectrin repeat containing nuclear envelope protein 2) The protein encoded by this gene is a nuclear outer membrane protein that binds cytoplasmic F-actin. This binding tethers the nucleus to the cytoskeleton and aids in the maintenance of the structural integrity of the nucleus. Several transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Mar 2009]

SYNE2 Gene-Disease associations (from GenCC):

• autosomal dominant Emery-Dreifuss muscular dystrophy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• Emery-Dreifuss muscular dystrophy 5, autosomal dominant

  Inheritance: AD, Unknown Classification: LIMITED, NO_KNOWN Submitted by: Illumina, Labcorp Genetics (formerly Invitae), Ambry Genetics
• left ventricular noncompaction

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.21223924).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SYNE2	NM_182914.3	c.4924G>A	p.Gly1642Ser	missense_variant	Exon 34 of 116	ENST00000555002.6	NP_878918.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SYNE2	ENST00000555002.6	c.4924G>A	p.Gly1642Ser	missense_variant	Exon 34 of 116	1	NM_182914.3	ENSP00000450831.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Emery-Dreifuss muscular dystrophy 5, autosomal dominant Uncertain:1

Feb 22, 2019

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

In summary, this variant is a novel missense change with uncertain impact on protein function. It has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). This variant is not present in population databases (ExAC no frequency) and has not been reported in the literature in individuals with a SYNE2-related disease. This sequence change replaces glycine with serine at codon 1642 of the SYNE2 protein (p.Gly1642Ser). The glycine residue is weakly conserved and there is a small physicochemical difference between glycine and serine. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.13
BayesDel_addAF	Benign	-0.087	T
BayesDel_noAF	Benign	-0.36
CADD	Uncertain	23
DANN	Uncertain	0.99
DEOGEN2	Benign	0.026	.;T;T;T
Eigen	Benign	-0.073
Eigen_PC	Benign	0.029
FATHMM_MKL	Uncertain	0.85	D
LIST_S2	Uncertain	0.90	D;D;D;D
M_CAP	Benign	0.033	D
MetaRNN	Benign	0.21	T;T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.9	L;.;L;.
PhyloP100		3.6
PrimateAI	Uncertain	0.56	T
PROVEAN	Benign	-2.3	N;.;N;N
REVEL	Benign	0.051
Sift	Benign	0.49	T;.;T;T
Sift4G	Pathogenic	0.0	D;D;D;D
Polyphen		0.48	P;.;B;.
Vest4		0.24
MutPred		0.33		Gain of disorder (P = 0.1285);Gain of disorder (P = 0.1285);Gain of disorder (P = 0.1285);Gain of disorder (P = 0.1285);
MVP		0.32
MPC		0.32
ClinPred		0.90	D
GERP RS		4.0
Varity_R		0.086
gMVP		0.16
Mutation Taster		=294/6	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs1555431607; hg19: chr14-64484349;