NM_006946.4:c.4899G>A

Variant names:

Variant summary

Our verdict is Benign. The variant received -19 ACMG points: 0P and 19B. BP4_ModerateBP6_Very_StrongBP7BA1

The NM_006946.4(SPTBN2):c.4899G>A(p.Leu1633Leu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0567 in 1,613,912 control chromosomes in the GnomAD database, including 3,203 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.063 ( 379 hom., cov: 32)

Exomes 𝑓: 0.056 ( 2824 hom. )

Consequence

SPTBN2
NM_006946.4 synonymous

Scores

Clinical Significance

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

Conservation

PhyloP100: 3.33

Publications

15 publications found

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 Gene-Disease associations (from GenCC):

autosomal recessive spinocerebellar ataxia 14
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: PanelApp Australia, Labcorp Genetics (formerly Invitae), G2P, Orphanet
spinocerebellar ataxia type 5
Inheritance: AD Classification: STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), Illumina, G2P

SPTBN2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -19 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.35).

BP6

Variant 11-66693056-C-T is Benign according to our data. Variant chr11-66693056-C-T is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 305553.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=3.33 with no splicing effect.

BA1

GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.107 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SPTBN2	NM_006946.4 link	c.4899G>A	p.Leu1633Leu	synonymous_variant	Exon 25 of 38	ENST00000533211.6	NP_008877.2	O15020-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SPTBN2	ENST00000533211.6 link	c.4899G>A	p.Leu1633Leu	synonymous_variant	Exon 25 of 38	5	NM_006946.4	ENSP00000432568.1		O15020-1

Frequencies

GnomAD3 genomes

AF:

0.0624

AC:

9499

AN:

152170

Hom.:

374

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0532

Gnomad AMI

AF:

0.00329

Gnomad AMR

AF:

0.0591

Gnomad ASJ

AF:

0.0248

Gnomad EAS

AF:

0.114

Gnomad SAS

AF:

0.0744

Gnomad FIN

AF:

0.146

Gnomad MID

AF:

0.00633

Gnomad NFE

AF:

0.0542

Gnomad OTH

AF:

0.0555

GnomAD2 exomes

AF:

0.0678

AC:

17031

AN:

251096

AF XY:

0.0668

show subpopulations

Gnomad AFR exome

AF:

0.0521

Gnomad AMR exome

AF:

0.0571

Gnomad ASJ exome

AF:

0.0250

Gnomad EAS exome

AF:

0.112

Gnomad FIN exome

AF:

0.136

Gnomad NFE exome

AF:

0.0567

Gnomad OTH exome

AF:

0.0644

GnomAD4 exome

AF:

0.0561

AC:

82046

AN:

1461624

Hom.:

2824

Cov.:

AF XY:

0.0564

AC XY:

41025

AN XY:

727122

show subpopulations

African (AFR)

AF:

0.0521

AC:

1744

AN:

33480

American (AMR)

AF:

0.0574

AC:

2568

AN:

44720

Ashkenazi Jewish (ASJ)

AF:

0.0264

AC:

689

AN:

26136

East Asian (EAS)

AF:

0.107

AC:

4262

AN:

39700

South Asian (SAS)

AF:

0.0664

AC:

5726

AN:

86254

European-Finnish (FIN)

AF:

0.136

AC:

7224

AN:

53164

Middle Eastern (MID)

AF:

0.0141

AC:

AN:

5764

European-Non Finnish (NFE)

AF:

0.0507

AC:

56333

AN:

1112010

Other (OTH)

AF:

0.0566

AC:

3419

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.489

Heterozygous variant carriers

5592

11183

16775

22366

27958

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

2130

4260

6390

8520

10650

<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:

0.0625

AC:

9522

AN:

152288

Hom.:

379

Cov.:

AF XY:

0.0664

AC XY:

4946

AN XY:

74460

show subpopulations

African (AFR)

AF:

0.0533

AC:

2215

AN:

41570

American (AMR)

AF:

0.0599

AC:

917

AN:

15304

Ashkenazi Jewish (ASJ)

AF:

0.0248

AC:

AN:

3470

East Asian (EAS)

AF:

0.114

AC:

592

AN:

5182

South Asian (SAS)

AF:

0.0751

AC:

363

AN:

4832

European-Finnish (FIN)

AF:

0.146

AC:

1546

AN:

10608

Middle Eastern (MID)

AF:

0.00680

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0542

AC:

3685

AN:

68004

Other (OTH)

AF:

0.0535

AC:

113

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.499

Heterozygous variant carriers

462

924

1385

1847

2309

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

110

220

330

440

550

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.0526

Hom.:

584

Bravo

AF:

0.0539

Asia WGS

AF:

0.125

AC:

433

AN:

3478

EpiCase

AF:

0.0446

EpiControl

AF:

0.0445

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:6

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:4

Jul 12, 2017

Athena Diagnostics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Feb 01, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Apr 13, 2021

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Breakthrough Genomics, Breakthrough Genomics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

SPTBN2-related disorder

Benign:1

Jul 08, 2019

PreventionGenetics, part of Exact Sciences

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

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). -

Autosomal dominant cerebellar ataxia

Benign:1

Jun 14, 2016

Illumina Laboratory Services, Illumina

Significance:Likely 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

-0.35

CADD

Benign

6.2

(source)

DANN

Benign

0.67

PhyloP100

3.3

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Mutation Taster

=98/2

polymorphism (auto)

(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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over