22-38740365-C-T

Position:

chr22-38740365-C-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_015374.3(SUN2):c.1258G>A(p.Gly420Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000443 in 1,578,638 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00015 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000033 ( 0 hom. )

Consequence

SUN2
NM_015374.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.0890

Variant links:

Genes affected

SUN2 (HGNC:14210): (Sad1 and UNC84 domain containing 2) SUN1 (MIM 607723) and SUN2 are inner nuclear membrane (INM) proteins that play a major role in nuclear-cytoplasmic connection by formation of a 'bridge' across the nuclear envelope, known as the LINC complex, via interaction with the conserved luminal KASH domain of nesprins (e.g., SYNE1; MIM 608441) located in the outer nuclear membrane (ONM). The LINC complex provides a direct connection between the nuclear lamina and the cytoskeleton, which contributes to nuclear positioning and cellular rigidity (summary by Haque et al., 2010 [PubMed 19933576]).[supplied by OMIM, Nov 2010]

SUN2 links:

(HGNC:):

links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.049504936).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SUN2	NM_015374.3 linkuse as main transcript	c.1258G>A	p.Gly420Ser	missense_variant	12/18	ENST00000689035.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SUN2	ENST00000689035.1 linkuse as main transcript	c.1258G>A	p.Gly420Ser	missense_variant	12/18		NM_015374.3	P2	Q9UH99-1
	ENST00000416406.1 linkuse as main transcript	n.165+1198C>T		intron_variant, non_coding_transcript_variant		3

Frequencies

GnomAD3 genomes

AF:

0.000151

AC:

AN:

152188

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000410

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000193

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000441

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.0000426

AC:

AN:

187810

Hom.:

AF XY:

0.0000294

AC XY:

AN XY:

101994

show subpopulations

Gnomad AFR exome

AF:

0.000379

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000792

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000254

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000329

AC:

AN:

1426450

Hom.:

Cov.:

AF XY:

0.0000326

AC XY:

AN XY:

706450

show subpopulations

Gnomad4 AFR exome

AF:

0.000213

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000788

Gnomad4 SAS exome

AF:

0.0000734

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000238

Gnomad4 OTH exome

AF:

0.0000848

GnomAD4 genome

AF:

0.000151

AC:

AN:

152188

Hom.:

Cov.:

AF XY:

0.0000807

AC XY:

AN XY:

74338

show subpopulations

Gnomad4 AFR

AF:

0.000410

Gnomad4 AMR

AF:

0.0000654

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000193

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000441

Gnomad4 OTH

AF:

0.000478

Alfa

AF:

0.0000773

Hom.:

Bravo

AF:

0.000162

ESP6500AA

AF:

0.000458

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000167

AC:

Asia WGS

AF:

0.00346

AC:

AN:

3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Emery-Dreifuss muscular dystrophy

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 08, 2024

This sequence change replaces glycine, which is neutral and non-polar, with serine, which is neutral and polar, at codon 420 of the SUN2 protein (p.Gly420Ser). This variant is present in population databases (rs376340507, gnomAD 0.04%). This variant has not been reported in the literature in individuals affected with SUN2-related conditions. ClinVar contains an entry for this variant (Variation ID: 530824). Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Not Available"; PolyPhen-2: "Benign"; Align-GVGD: "Not Available". The serine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. 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

0.083

BayesDel_addAF

Benign

-0.59

BayesDel_noAF

Benign

-0.77

CADD

Benign

9.8

DANN

Benign

0.88

DEOGEN2

Benign

0.019

T;.;T

Eigen

Benign

-1.0

Eigen_PC

Benign

-0.95

FATHMM_MKL

Benign

0.58

LIST_S2

Benign

0.51

.;T;T

M_CAP

Benign

0.0090

MetaRNN

Benign

0.050

T;T;T

MetaSVM

Benign

-0.98

MutationAssessor

Benign

0.42

N;.;N

MutationTaster

Benign

1.0

N;N;N;N;N

PrimateAI

Benign

0.33

PROVEAN

Benign

0.020

N;N;N

REVEL

Benign

0.043

Sift

Benign

0.46

T;T;T

Sift4G

Benign

0.77

T;T;T

Polyphen

0.018

B;.;B

Vest4

0.14

MVP

0.095

MPC

0.24

ClinPred

0.020

GERP RS

0.26

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.040

gMVP

0.21

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