dbSNP rs143166100: SPTAN1:p.Ala1428Gly (chr9-128607988-C-G) – ACMG Classification: Benign (-20 pts)

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_001130438.3(SPTAN1):c.4283C>G(p.Ala1428Gly) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000814 in 1,614,122 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.00056 ( 0 hom., cov: 31)

Exomes 𝑓: 0.00084 ( 1 hom. )

Consequence

SPTAN1
NM_001130438.3 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts P:1U:1B:12

Conservation

PhyloP100: 7.84

Publications

5 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: Labcorp Genetics (formerly Invitae), Laboratory for Molecular Medicine, G2P, Ambry Genetics
genetic developmental and epileptic encephalopathy
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
infantile spasms
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

SPTAN1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.04529336).

BP6

Variant 9-128607988-C-G is Benign according to our data. Variant chr9-128607988-C-G is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 196861.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.000558 (85/152250) while in subpopulation NFE AF = 0.00113 (77/68010). AF 95% confidence interval is 0.000928. There are 0 homozygotes in GnomAd4. There are 40 alleles in the male GnomAd4 subpopulation. Median coverage is 31. This position passed quality control check.

BS2

High AC in GnomAd4 at 85 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	HGVSp	Effect	Exon Rank	Protein	UniProt
SPTAN1	NM_001130438.3	MANE Select	c.4283C>G	p.Ala1428Gly	missense	Exon 33 of 57	NP_001123910.1	Q13813-2
SPTAN1	NM_001375318.1		c.4319C>G	p.Ala1440Gly	missense	Exon 34 of 59	NP_001362247.1
SPTAN1	NM_001375310.1		c.4283C>G	p.Ala1428Gly	missense	Exon 33 of 58	NP_001362239.1	A0A994J6W3

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
SPTAN1	ENST00000372739.7	TSL:1 MANE Select	c.4283C>G	p.Ala1428Gly	missense	Exon 33 of 57	ENSP00000361824.4	Q13813-2
SPTAN1	ENST00000372731.8	TSL:1	c.4283C>G	p.Ala1428Gly	missense	Exon 33 of 56	ENSP00000361816.4	Q13813-1
SPTAN1	ENST00000358161.9	TSL:1	c.4223C>G	p.Ala1408Gly	missense	Exon 32 of 55	ENSP00000350882.6	Q13813-3

Frequencies

GnomAD3 genomes

AF:

0.000559

AC:

AN:

152132

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000145

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000414

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00113

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000573

AC:

144

AN:

251446

AF XY:

0.000625

show subpopulations

Gnomad AFR exome

AF:

0.000123

Gnomad AMR exome

AF:

0.000520

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00104

Gnomad OTH exome

AF:

0.000489

GnomAD4 exome

AF:

0.000841

AC:

1229

AN:

1461872

Hom.:

Cov.:

AF XY:

0.000818

AC XY:

595

AN XY:

727244

show subpopulations

African (AFR)

AF:

0.0000896

AC:

AN:

33480

American (AMR)

AF:

0.000447

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.0000464

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.0000936

AC:

AN:

53416

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5750

European-Non Finnish (NFE)

AF:

0.00104

AC:

1154

AN:

1112012

Other (OTH)

AF:

0.000712

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

157

235

314

392

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

132

176

220

<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:

0.000558

AC:

AN:

152250

Hom.:

Cov.:

AF XY:

0.000537

AC XY:

AN XY:

74424

show subpopulations

African (AFR)

AF:

0.000144

AC:

AN:

41542

American (AMR)

AF:

0.00

AC:

AN:

15296

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5188

South Asian (SAS)

AF:

0.000414

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10596

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00113

AC:

AN:

68010

Other (OTH)

AF:

0.00

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.507

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:

0.000844

Hom.:

Bravo

AF:

0.000491

TwinsUK

AF:

0.000539

AC:

ALSPAC

AF:

0.000259

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.00105

AC:

ExAC

AF:

0.000642

AC:

EpiCase

AF:

0.00125

EpiControl

AF:

0.00107

ClinVar

ClinVar submissions as Germline

Significance:Benign/Likely benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

Developmental and epileptic encephalopathy, 5 (4)

not provided (4)

not specified (2)

Developmental and epileptic encephalopathy (1)

Inborn genetic diseases (1)

Self-limited epilepsy with centrotemporal spikes (1)

SPTAN1-related disorder (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.097

BayesDel_addAF

Benign

-0.39

BayesDel_noAF

Benign

-0.38

CADD

Uncertain

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.16

Eigen

Benign

0.16

Eigen_PC

Uncertain

0.34

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Benign

0.82

M_CAP

Benign

0.0058

MetaRNN

Benign

0.045

MetaSVM

Benign

-0.99

MutationAssessor

Benign

0.90

PhyloP100

7.8

PrimateAI

Benign

0.31

PROVEAN

Benign

-1.5

REVEL

Benign

0.076

Sift

Benign

0.079

Sift4G

Benign

0.064

Polyphen

0.0050

Vest4

0.28

MVP

0.35

MPC

0.77

ClinPred

0.035

GERP RS

5.6

RBP_binding_hub_radar

0.97

RBP_regulation_power_radar

2.7

Varity_R

0.24

gMVP

0.082

Mutation Taster

=11/89

disease causing

(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