rs199815268

chr3-20183961-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 8P and 4B. PP5_Very_StrongBS2

The NM_001199251.3(SGO1):c.67A>G(p.Lys23Glu) variant causes a missense change. The variant allele was found at a frequency of 0.000164 in 1,612,714 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Pathogenic (★★).

Frequency

Genomes: 𝑓 0.00014 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00017 ( 0 hom. )

Consequence

SGO1
NM_001199251.3 missense

Scores

Clinical Significance

Pathogenic criteria provided, multiple submitters, no conflicts P:4

Conservation

PhyloP100: 6.24

Variant links:

Genes affected

SGO1 (HGNC:25088): (shugoshin 1) The protein encoded by this gene is a member of the shugoshin family of proteins. This protein is thought to protect centromeric cohesin from cleavage during mitotic prophase by preventing phosphorylation of a cohesin subunit. Reduced expression of this gene leads to the premature loss of centromeric cohesion, mis-segregation of sister chromatids, and mitotic arrest. Evidence suggests that this protein also protects a small subset of cohesin found along the length of the chromosome arms during mitotic prophase. An isoform lacking exon 6 has been shown to play a role in the cohesion of centrioles (PMID: 16582621 and PMID:18331714). Mutations in this gene have been associated with Chronic Atrial and Intestinal Dysrhythmia (CAID) syndrome, characterized by the co-occurrence of Sick Sinus Syndrome (SSS) and Chronic Intestinal Pseudo-obstruction (CIPO) within the first four decades of life (PMID:25282101). Fibroblast cells from CAID patients exhibited both increased cell proliferation and higher rates of senescence. Pseudogenes of this gene have been found on chromosomes 1 and 7. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Mar 2015]

SGO1 links:

SGO1-AS1 (HGNC:41081): (SGO1 antisense RNA 1)

SGO1-AS1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 4 ACMG points.

PP5

Variant 3-20183961-T-C is Pathogenic according to our data. Variant chr3-20183961-T-C is described in ClinVar as [Pathogenic]. Clinvar id is 162627.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr3-20183961-T-C is described in Lovd as [Pathogenic].

BS2

High AC in GnomAd at 21 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SGO1	NM_001199251.3 linkuse as main transcript	c.67A>G	p.Lys23Glu	missense_variant	2/8	ENST00000412997.6
SGO1-AS1	NR_132785.1 linkuse as main transcript	n.359-2014T>C		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SGO1	ENST00000412997.6 linkuse as main transcript	c.67A>G	p.Lys23Glu	missense_variant	2/8	1	NM_001199251.3	P2	Q5FBB7-6

Frequencies

GnomAD3 genomes

AF:

0.000138

AC:

AN:

152234

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000482

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000250

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000188

AC:

AN:

250128

Hom.:

AF XY:

0.000192

AC XY:

AN XY:

135160

show subpopulations

Gnomad AFR exome

AF:

0.0000616

Gnomad AMR exome

AF:

0.000321

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000166

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000256

Gnomad OTH exome

AF:

0.000164

GnomAD4 exome

AF:

0.000167

AC:

244

AN:

1460480

Hom.:

Cov.:

AF XY:

0.000154

AC XY:

112

AN XY:

726440

show subpopulations

Gnomad4 AFR exome

AF:

0.0000898

Gnomad4 AMR exome

AF:

0.000225

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000233

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000183

Gnomad4 OTH exome

AF:

0.0000828

GnomAD4 genome

AF:

0.000138

AC:

AN:

152234

Hom.:

Cov.:

AF XY:

0.000148

AC XY:

AN XY:

74370

show subpopulations

Gnomad4 AFR

AF:

0.0000482

Gnomad4 AMR

AF:

0.0000654

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000250

Gnomad4 OTH

AF:

0.000478

Alfa

AF:

0.000182

Hom.:

Bravo

AF:

0.000162

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.000181

AC:

EpiCase

AF:

0.000164

EpiControl

AF:

0.000296

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Chronic atrial and intestinal dysrhythmia

Pathogenic:3

Pathogenic, criteria provided, single submitter	clinical testing	Neuberg Centre For Genomic Medicine, NCGM	-	The missense c.67A>G p.Lys23Glu variant in SGO1 gene has been reported in homozygous state in multiple individuals affected with gastrointestinal disorder Chetaille et al., 2014. In vitro studies in patient fibroblasts with homozygous p.Lys23Glu suggest abnormal cell progression, cell signalling, epigenetic modifications, and protein expression compared to controls Chetaille et al., 2014. The variant is reported with allele frequency of 0.02% in gnomAD Exomes and is novel not in any individuals in 1000 Genomes. This variant has been reported to the ClinVar database as Pathogenic multiple submissions. The amino acid change p.Lys23Glu in SGO1 is predicted as conserved by GERP++ and PhyloP across 100 vertebrates. The amino acid Lys at position 23 is changed to a Glu changing protein sequence and it might alter its composition and physico-chemical properties. For these reasons, this variant has been classified as Pathogenic. -
Pathogenic, no assertion criteria provided	literature only	OMIM	Nov 01, 2014	- -
Pathogenic, criteria provided, single submitter	clinical testing	Fulgent Genetics, Fulgent Genetics	Apr 12, 2022	- -

not provided

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

GeneDx

Jan 11, 2023

In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; In vitro studies in patient fibroblasts with homozygous p.K23E suggest abnormal cell progression, cell signalling, epigenetic modifications, and protein expression compared to controls (Chetaille et al., 2014; Piche et al., 2019); This variant is associated with the following publications: (PMID: 31516082, 30739867, 25282101, 35799243, 32213217, 33953173) -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.67

BayesDel_addAF

Benign

-0.037

BayesDel_noAF

Uncertain

0.040

Cadd

Pathogenic

Dann

Uncertain

1.0

Eigen

Pathogenic

0.73

Eigen_PC

Pathogenic

0.73

FATHMM_MKL

Pathogenic

0.99

M_CAP

Uncertain

0.11

MetaRNN

Uncertain

0.70

D;D;D;D;D;D;D;D;D;D;D

MetaSVM

Uncertain

-0.21

MutationTaster

Benign

1.0

D;D;D;D;D;D;D;D;D;D;D;D;D;D

PrimateAI

Uncertain

0.64

PROVEAN

Uncertain

-2.9

D;D;D;D;D;D;D;D;D;D;D

REVEL

Pathogenic

0.77

Sift

Uncertain

0.0030

D;D;D;D;D;D;D;D;D;D;D

Sift4G

Pathogenic

0.0

D;D;D;D;D;D;D;D;D;D;D

Polyphen

1.0

D;D;D;D;D;D;D;D;.;D;D

Vest4

0.70

MVP

0.84

MPC

0.19

ClinPred

0.21

GERP RS

5.7

Varity_R

0.76

gMVP

0.32

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

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