Genetic Variant SUN2:p.His325Gln (chr22-38742394-G-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

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

The NM_015374.3(SUN2):c.975C>A(p.His325Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,022 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. H325H) has been classified as Benign.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

SUN2
NM_015374.3 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -6.66

Publications

0 publications found

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:

GTPBP1 (HGNC:4669): (GTP binding protein 1) This gene is upregulated by interferon-gamma and encodes a protein that is a member of the AGP11/GTPBP1 family of GTP-binding proteins. A structurally similar protein has been found in mouse, where disruption of the gene for that protein had no observable phenotype. [provided by RefSeq, Jul 2008]

GTPBP1 Gene-Disease associations (from GenCC):

neurodevelopmental disorder with characteristic facial and ectodermal features and tetraparesis 1
Inheritance: AR Classification: MODERATE Submitted by: G2P

GTPBP1 links:

ENSG00000225450 (HGNC:):

ENSG00000225450 links:

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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=0.032145113).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_015374.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
SUN2	NM_015374.3	MANE Select	c.975C>A	p.His325Gln	missense	Exon 9 of 18	NP_056189.1
SUN2	NM_001394427.1		c.1068C>A	p.His356Gln	missense	Exon 10 of 19	NP_001381356.1
SUN2	NM_001199579.2		c.1038C>A	p.His346Gln	missense	Exon 9 of 18	NP_001186508.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
SUN2	ENST00000689035.1	MANE Select	c.975C>A	p.His325Gln	missense	Exon 9 of 18	ENSP00000508608.1
SUN2	ENST00000405018.5	TSL:1	c.1038C>A	p.His346Gln	missense	Exon 9 of 18	ENSP00000385616.1
SUN2	ENST00000405510.5	TSL:1	c.975C>A	p.His325Gln	missense	Exon 10 of 19	ENSP00000385740.1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461022

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

726828

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:

0.00

AC:

AN:

86254

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52634

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1111944

Other (OTH)

AF:

0.00

AC:

AN:

60384

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.575

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

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.081

BayesDel_addAF

Benign

-0.33

BayesDel_noAF

Benign

-0.71

CADD

Benign

0.0030

(source)

DANN

Benign

0.83

DEOGEN2

Benign

0.091

Eigen

Benign

-1.8

Eigen_PC

Benign

-1.8

FATHMM_MKL

Benign

0.031

LIST_S2

Benign

0.54

M_CAP

Benign

0.0057

MetaRNN

Benign

0.032

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.90

PhyloP100

-6.7

PrimateAI

Benign

0.45

PROVEAN

Benign

-1.2

REVEL

Benign

0.024

Sift

Benign

0.46

Sift4G

Benign

0.45

Polyphen

0.0040

Vest4

0.071

MutPred

0.17

Gain of helix (P = 0.0143)

MVP

0.12

MPC

0.24

ClinPred

0.083

GERP RS

-11

Varity_R

0.039

gMVP

0.12

Mutation Taster

=94/6

polymorphism

(source)

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over