rs114826023

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_001130965.3(SUN1):​c.226G>A​(p.Gly76Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000622 in 1,607,632 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G76C) has been classified as Benign.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 33)
Exomes 𝑓: 0.0000062 ( 0 hom. )

Consequence

SUN1
NM_001130965.3 missense

Scores

18

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.117

Publications

2 publications found
Variant links:
Genes affected
SUN1 (HGNC:18587): (Sad1 and UNC84 domain containing 1) This gene is a member of the unc-84 homolog family and encodes a nuclear envelope protein with an Unc84 (SUN) domain. The protein is involved in nuclear anchorage and migration. Alternatively spliced transcript variants have been described. [provided by RefSeq, Jan 2019]

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

PM2
Very rare variant in population databases, with high coverage;
BP4
Computational evidence support a benign effect (MetaRNN=0.03240636).

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect Exon rank MANE Protein UniProt
SUN1NM_001130965.3 linkc.226G>A p.Gly76Ser missense_variant Exon 2 of 19 ENST00000401592.6 NP_001124437.1 O94901-8

Ensembl

Gene Transcript HGVSc HGVSp Effect Exon rank TSL MANE Protein Appris UniProt
SUN1ENST00000401592.6 linkc.226G>A p.Gly76Ser missense_variant Exon 2 of 19 1 NM_001130965.3 ENSP00000384015.1 O94901-8

Frequencies

GnomAD3 genomes
AF:
0.00000657
AC:
1
AN:
152182
Hom.:
0
Cov.:
33
show subpopulations
Gnomad AFR
AF:
0.00
Gnomad AMI
AF:
0.00
Gnomad AMR
AF:
0.00
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:
0.00
Gnomad OTH
AF:
0.00
GnomAD2 exomes
AF:
0.00000421
AC:
1
AN:
237356
AF XY:
0.00000775
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:
0.00000921
Gnomad OTH exome
AF:
0.00
GnomAD4 exome
AF:
0.00000618
AC:
9
AN:
1455332
Hom.:
0
Cov.:
31
AF XY:
0.00000276
AC XY:
2
AN XY:
723382
show subpopulations
African (AFR)
AF:
0.0000299
AC:
1
AN:
33390
American (AMR)
AF:
0.00
AC:
0
AN:
43852
Ashkenazi Jewish (ASJ)
AF:
0.00
AC:
0
AN:
25904
East Asian (EAS)
AF:
0.0000253
AC:
1
AN:
39530
South Asian (SAS)
AF:
0.00
AC:
0
AN:
84456
European-Finnish (FIN)
AF:
0.00
AC:
0
AN:
52488
Middle Eastern (MID)
AF:
0.00
AC:
0
AN:
5752
European-Non Finnish (NFE)
AF:
0.00000631
AC:
7
AN:
1109792
Other (OTH)
AF:
0.00
AC:
0
AN:
60168
Allele Balance Distribution
Red line indicates average allele balance
Average allele balance: 0.508
Heterozygous variant carriers
0
1
2
3
4
5
0.00
0.20
0.40
0.60
0.80
0.95
Allele balance

Age Distribution

Exome Het
Variant carriers
0
2
4
6
8
10
<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:
0.00000657
AC:
1
AN:
152300
Hom.:
0
Cov.:
33
AF XY:
0.0000134
AC XY:
1
AN XY:
74482
show subpopulations
African (AFR)
AF:
0.00
AC:
0
AN:
41580
American (AMR)
AF:
0.00
AC:
0
AN:
15300
Ashkenazi Jewish (ASJ)
AF:
0.00
AC:
0
AN:
3472
East Asian (EAS)
AF:
0.000193
AC:
1
AN:
5172
South Asian (SAS)
AF:
0.00
AC:
0
AN:
4822
European-Finnish (FIN)
AF:
0.00
AC:
0
AN:
10612
Middle Eastern (MID)
AF:
0.00
AC:
0
AN:
294
European-Non Finnish (NFE)
AF:
0.00
AC:
0
AN:
68020
Other (OTH)
AF:
0.00
AC:
0
AN:
2116
Allele Balance Distribution
Red line indicates average allele balance
Average allele balance: 0.625
Heterozygous variant carriers
0
0
1
1
2
2
0.00
0.20
0.40
0.60
0.80
0.95
Allele balance
Alfa
AF:
0.00
Hom.:
0
Bravo
AF:
0.00000378

ClinVar

Significance: Uncertain significance
Submissions summary: Uncertain:1
Revision: criteria provided, single submitter
LINK: link

Submissions by phenotype

Emery-Dreifuss muscular dystrophy Uncertain:1
Oct 19, 2021
Labcorp Genetics (formerly Invitae), Labcorp
Significance:Uncertain significance
Review Status:criteria provided, single submitter
Collection Method:clinical testing

This sequence change replaces glycine with serine at codon 76 of the SUN1 protein (p.Gly76Ser). The glycine residue is weakly conserved and there is a small physicochemical difference between glycine and serine. This variant is not present in population databases (ExAC no frequency). This variant has not been reported in the literature in individuals affected with SUN1-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". 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
BayesDel_addAF
Benign
-0.26
T
BayesDel_noAF
Benign
-0.61
CADD
Benign
0.35
DANN
Benign
0.65
DEOGEN2
Benign
0.0022
.;.;.;.;T;T;T;.;T;T;.;.;.;T
Eigen
Benign
-1.5
Eigen_PC
Benign
-1.5
FATHMM_MKL
Benign
0.0066
N
LIST_S2
Benign
0.72
T;.;T;T;.;T;T;T;T;T;T;T;T;T
M_CAP
Benign
0.015
T
MetaRNN
Benign
0.032
T;T;T;T;T;T;T;T;T;T;T;T;T;T
MetaSVM
Benign
-1.1
T
MutationAssessor
Benign
-0.26
.;.;N;.;.;.;.;.;.;.;N;N;.;.
PhyloP100
0.12
PrimateAI
Benign
0.35
T
PROVEAN
Benign
1.5
N;N;N;N;N;N;N;N;N;N;N;N;N;N
REVEL
Benign
0.019
Sift
Benign
0.66
T;T;T;T;T;T;T;T;T;T;T;T;T;T
Sift4G
Benign
0.75
T;T;T;T;T;T;T;T;T;T;T;T;T;T
Polyphen
0.013
.;B;.;.;.;.;.;.;.;.;.;.;B;.
Vest4
0.098
MutPred
0.38
.;Gain of phosphorylation at G26 (P = 0.0201);.;.;.;.;.;.;.;.;.;.;Gain of phosphorylation at G26 (P = 0.0201);.;
MVP
0.15
MPC
0.086
ClinPred
0.025
T
GERP RS
-2.4
PromoterAI
0.0086
Neutral
RBP_binding_hub_radar
0.0
RBP_regulation_power_radar
1.1
gMVP
0.12
Mutation Taster
=97/3
polymorphism

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

Other links and lift over

dbSNP: rs114826023; hg19: chr7-878583; API