1-25809124-C-T

Variant names:

Variant summary

Our verdict is Benign. Variant got -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BS1BS2

The NM_020451.3(SELENON):c.846C>T(p.Ser282Ser) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000278 in 1,613,794 control chromosomes in the GnomAD database, including 4 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0015 ( 1 hom., cov: 33)

Exomes 𝑓: 0.00016 ( 3 hom. )

Consequence

SELENON
NM_020451.3 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:5

Conservation

PhyloP100: -0.405

Variant links:

Genes affected

SELENON (HGNC:15999): (selenoprotein N) This gene encodes a glycoprotein that is localized in the endoplasmic reticulum. It plays an important role in cell protection against oxidative stress, and in the regulation of redox-related calcium homeostasis. Mutations in this gene are associated with early onset muscle disorders, referred to as SEPN1-related myopathy. SEPN1-related myopathy consists of 4 autosomal recessive disorders, originally thought to be separate entities: rigid spine muscular dystrophy (RSMD1), the classical form of multiminicore disease, desmin related myopathy with Mallory-body like inclusions, and congenital fiber-type disproportion (CFTD). This protein is a selenoprotein, containing the rare amino acid selenocysteine (Sec). Sec is encoded by the UGA codon, which normally signals translation termination. The 3' UTRs of selenoprotein mRNAs contain a conserved stem-loop structure, designated the Sec insertion sequence (SECIS) element, that is necessary for the recognition of UGA as a Sec codon, rather than as a stop signal. A second stop-codon redefinition element (SRE) adjacent to the UGA codon has been identified in this gene (PMID:15791204). SRE is a phylogenetically conserved stem-loop structure that stimulates readthrough at the UGA codon, and augments the Sec insertion efficiency by SECIS. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Dec 2016]

SELENON links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -21 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.49).

BP6

Variant 1-25809124-C-T is Benign according to our data. Variant chr1-25809124-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 198237.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr1-25809124-C-T is described in Lovd as [Benign].

BP7

Synonymous conserved (PhyloP=-0.405 with no splicing effect.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00145 (221/152360) while in subpopulation AFR AF= 0.00515 (214/41586). AF 95% confidence interval is 0.00458. There are 1 homozygotes in gnomad4. There are 102 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.

BS2

High Homozygotes in GnomAdExome4 at 3 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SELENON	NM_020451.3 link	c.846C>T	p.Ser282Ser	synonymous_variant	Exon 6 of 13	ENST00000361547.7	NP_065184.2	Q9NZV5-1
SELENON	NM_206926.2 link	c.744C>T	p.Ser248Ser	synonymous_variant	Exon 5 of 12		NP_996809.1	Q9NZV5-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
SELENON	ENST00000361547.7 link	c.846C>T	p.Ser282Ser	synonymous_variant	Exon 6 of 13	1	NM_020451.3	ENSP00000355141.2	Q9NZV5-1
SELENON	ENST00000374315.1 link	c.744C>T	p.Ser248Ser	synonymous_variant	Exon 5 of 12	5		ENSP00000363434.1	Q9NZV5-2
SELENON	ENST00000354177.9 link	c.675C>T	p.Ser225Ser	synonymous_variant	Exon 5 of 12	5		ENSP00000346109.5	H9KV50
SELENON	ENST00000494537.2 link	n.744C>T		non_coding_transcript_exon_variant	Exon 5 of 13	3		ENSP00000508308.1	A0A804HLD6

Frequencies

GnomAD3 genomes

AF:

0.00145

AC:

221

AN:

152242

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00516

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000327

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:

0.00

Gnomad OTH

AF:

0.000956

GnomAD3 exomes

AF:

0.000365

AC:

AN:

249228

Hom.:

AF XY:

0.000273

AC XY:

AN XY:

135352

show subpopulations

Gnomad AFR exome

AF:

0.00485

Gnomad AMR exome

AF:

0.000406

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000885

Gnomad OTH exome

AF:

0.000165

GnomAD4 exome

AF:

0.000155

AC:

227

AN:

1461434

Hom.:

Cov.:

AF XY:

0.000133

AC XY:

AN XY:

727026

show subpopulations

Gnomad4 AFR exome

AF:

0.00550

Gnomad4 AMR exome

AF:

0.000358

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000464

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000360

Gnomad4 OTH exome

AF:

0.000298

GnomAD4 genome

AF:

0.00145

AC:

221

AN:

152360

Hom.:

Cov.:

AF XY:

0.00137

AC XY:

102

AN XY:

74498

show subpopulations

Gnomad4 AFR

AF:

0.00515

Gnomad4 AMR

AF:

0.000327

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.000946

Alfa

AF:

0.000890

Hom.:

Bravo

AF:

0.00179

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:2

Mar 06, 2015

Eurofins Ntd Llc (ga)

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Apr 06, 2017

GeneDx

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

not provided

Benign:2

Apr 01, 2024

CeGaT Center for Human Genetics Tuebingen

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

SELENON: BP4, BP7 -

Breakthrough Genomics, Breakthrough Genomics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: not provided

- -

Eichsfeld type congenital muscular dystrophy

Benign:1

Jan 22, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.49

CADD

Benign

6.4

DANN

Benign

0.80

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

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