chr9-128593053-TGA-T

Variant names:

Variant summary

Our verdict is Benign. The variant received -16 ACMG points: 0P and 16B. BP6_Very_StrongBS1BS2

The NM_001130438.3(SPTAN1):c.3215+15_3215+16delAG variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000388 in 1,607,102 control chromosomes in the GnomAD database, including 1 homozygotes. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.00093 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00033 ( 1 hom. )

Consequence

SPTAN1
NM_001130438.3 intron

Scores

Not classified

Clinical Significance

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

Conservation

PhyloP100: 2.09

Publications

1 publications found

Variant links:

Genes affected

SPTAN1 (HGNC:11273): (spectrin alpha, non-erythrocytic 1) Spectrins are a family of filamentous cytoskeletal proteins that function as essential scaffold proteins that stabilize the plasma membrane and organize intracellular organelles. Spectrins are composed of alpha and beta dimers that associate to form tetramers linked in a head-to-head arrangement. This gene encodes an alpha spectrin that is specifically expressed in nonerythrocytic cells. The encoded protein has been implicated in other cellular functions including DNA repair and cell cycle regulation. Mutations in this gene are the cause of early infantile epileptic encephalopathy-5. Alternate splicing results in multiple transcript variants.[provided by RefSeq, Sep 2010]

SPTAN1 Gene-Disease associations (from GenCC):

developmental and epileptic encephalopathy, 5
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: PanelApp Australia, Labcorp Genetics (formerly Invitae), Laboratory for Molecular Medicine, G2P, Ambry Genetics
genetic developmental and epileptic encephalopathy
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
neuronopathy, distal hereditary motor, autosomal dominant 11
Inheritance: AD Classification: STRONG Submitted by: PanelApp Australia
spastic paraplegia 91, autosomal dominant, with or without cerebellar ataxia
Inheritance: AD Classification: STRONG Submitted by: PanelApp Australia
infantile spasms
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
hereditary spastic paraplegia
Inheritance: AR Classification: LIMITED Submitted by: PanelApp Australia

SPTAN1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -16 ACMG points.

BP6

Variant 9-128593053-TGA-T is Benign according to our data. Variant chr9-128593053-TGA-T is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 207278.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.000926 (141/152312) while in subpopulation AFR AF = 0.00226 (94/41582). AF 95% confidence interval is 0.00189. There are 0 homozygotes in GnomAd4. There are 64 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High AC in GnomAd4 at 141 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001130438.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein	UniProt
SPTAN1	NM_001130438.3	MANE Select	c.3215+15_3215+16delAG	intron	N/A	NP_001123910.1	Q13813-2
SPTAN1	NM_001375318.1		c.3251+15_3251+16delAG	intron	N/A	NP_001362247.1
SPTAN1	NM_001375310.1		c.3215+15_3215+16delAG	intron	N/A	NP_001362239.1	A0A994J6W3

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein	UniProt
SPTAN1	ENST00000372739.7	TSL:1 MANE Select	c.3215+15_3215+16delAG	intron	N/A	ENSP00000361824.4	Q13813-2
SPTAN1	ENST00000372731.8	TSL:1	c.3215+15_3215+16delAG	intron	N/A	ENSP00000361816.4	Q13813-1
SPTAN1	ENST00000358161.9	TSL:1	c.3156-1118_3156-1117delAG	intron	N/A	ENSP00000350882.6	Q13813-3

Frequencies

GnomAD3 genomes

AF:

0.000926

AC:

141

AN:

152194

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00227

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00164

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:

0.000279

Gnomad OTH

AF:

0.00143

GnomAD2 exomes

AF:

0.000532

AC:

127

AN:

238540

AF XY:

0.000529

show subpopulations

Gnomad AFR exome

AF:

0.00216

Gnomad AMR exome

AF:

0.00143

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000345

Gnomad OTH exome

AF:

0.00169

GnomAD4 exome

AF:

0.000331

AC:

482

AN:

1454790

Hom.:

AF XY:

0.000340

AC XY:

246

AN XY:

722826

show subpopulations

African (AFR)

AF:

0.00177

AC:

AN:

33388

American (AMR)

AF:

0.00132

AC:

AN:

43970

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25932

East Asian (EAS)

AF:

0.00

AC:

AN:

39590

South Asian (SAS)

AF:

0.0000354

AC:

AN:

84764

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52946

Middle Eastern (MID)

AF:

0.000535

AC:

AN:

5610

European-Non Finnish (NFE)

AF:

0.000300

AC:

333

AN:

1108440

Other (OTH)

AF:

0.000432

AC:

AN:

60150

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.459

Heterozygous variant carriers

114

143

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

100

<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:

0.000926

AC:

141

AN:

152312

Hom.:

Cov.:

AF XY:

0.000859

AC XY:

AN XY:

74476

show subpopulations

African (AFR)

AF:

0.00226

AC:

AN:

41582

American (AMR)

AF:

0.00163

AC:

AN:

15296

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5174

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10618

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000279

AC:

AN:

68022

Other (OTH)

AF:

0.00142

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.511

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome 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

Alfa

AF:

0.000651

Hom.:

Bravo

AF:

0.00113

ClinVar

ClinVar submissions

Significance:Benign/Likely benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

not specified (4)

Developmental and epileptic encephalopathy (1)

Developmental and epileptic encephalopathy, 5 (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

PhyloP100

2.1

Mutation Taster

=100/0

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over