rs61741217

Positions:

chr11-66686024-C-T

Variant summary

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

The NM_006946.4(SPTBN2):c.7020G>A(p.Pro2340=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0017 in 1,613,682 control chromosomes in the GnomAD database, including 43 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0089 ( 23 hom., cov: 32)

Exomes 𝑓: 0.00096 ( 20 hom. )

Consequence

SPTBN2
NM_006946.4 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:6

Conservation

PhyloP100: -2.29

Variant links:

Genes affected

SPTBN2 (HGNC:11276): (spectrin beta, non-erythrocytic 2) Spectrins are principle components of a cell's membrane-cytoskeleton and are composed of two alpha and two beta spectrin subunits. The protein encoded by this gene (SPTBN2), is called spectrin beta non-erythrocytic 2 or beta-III spectrin. It is related to, but distinct from, the beta-II spectrin gene which is also known as spectrin beta non-erythrocytic 1 (SPTBN1). SPTBN2 regulates the glutamate signaling pathway by stabilizing the glutamate transporter EAAT4 at the surface of the plasma membrane. Mutations in this gene cause a form of spinocerebellar ataxia, SCA5, that is characterized by neurodegeneration, progressive locomotor incoordination, dysarthria, and uncoordinated eye movements. [provided by RefSeq, Dec 2009]

SPTBN2 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=-0.78).

BP6

Variant 11-66686024-C-T is Benign according to our data. Variant chr11-66686024-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 305523.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr11-66686024-C-T is described in Lovd as [Benign].

BP7

Synonymous conserved (PhyloP=-2.29 with no splicing effect.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00887 (1350/152258) while in subpopulation AFR AF= 0.0302 (1255/41542). AF 95% confidence interval is 0.0288. There are 23 homozygotes in gnomad4. There are 612 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High Homozygotes in GnomAd4 at 23 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SPTBN2	NM_006946.4 linkuse as main transcript	c.7020G>A	p.Pro2340=	synonymous_variant	38/38	ENST00000533211.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SPTBN2	ENST00000533211.6 linkuse as main transcript	c.7020G>A	p.Pro2340=	synonymous_variant	38/38	5	NM_006946.4	P1	O15020-1

Frequencies

GnomAD3 genomes

AF:

0.00885

AC:

1347

AN:

152140

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0302

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00452

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:

0.000147

Gnomad OTH

AF:

0.00766

GnomAD3 exomes

AF:

0.00250

AC:

622

AN:

248670

Hom.:

AF XY:

0.00167

AC XY:

225

AN XY:

134934

show subpopulations

Gnomad AFR exome

AF:

0.0331

Gnomad AMR exome

AF:

0.00214

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000980

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000116

Gnomad OTH exome

AF:

0.000984

GnomAD4 exome

AF:

0.000957

AC:

1399

AN:

1461424

Hom.:

Cov.:

AF XY:

0.000802

AC XY:

583

AN XY:

727040

show subpopulations

Gnomad4 AFR exome

AF:

0.0321

Gnomad4 AMR exome

AF:

0.00215

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.000104

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000782

Gnomad4 OTH exome

AF:

0.00207

GnomAD4 genome

AF:

0.00887

AC:

1350

AN:

152258

Hom.:

Cov.:

AF XY:

0.00822

AC XY:

612

AN XY:

74456

show subpopulations

Gnomad4 AFR

AF:

0.0302

Gnomad4 AMR

AF:

0.00451

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000147

Gnomad4 OTH

AF:

0.00758

Alfa

AF:

0.00427

Hom.:

Bravo

AF:

0.0112

Asia WGS

AF:

0.00115

AC:

AN:

3478

EpiCase

AF:

0.0000545

EpiControl

AF:

0.0000593

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:6

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:3

Likely benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -
Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 29, 2024	- -
Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Sep 18, 2021	See Variant Classification Assertion Criteria. -

SPTBN2-related disorder

Benign:1

Benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Mar 27, 2019

This variant is classified as benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Spinocerebellar ataxia type 5

Benign:1

Benign, criteria provided, single submitter

clinical testing

Athena Diagnostics

Jun 12, 2017

- -

Autosomal dominant cerebellar ataxia

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jun 14, 2016

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.78

CADD

Benign

0.46

DANN

Benign

0.43

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