dbSNP rs140353002: SPTAN1:p.Thr1925Thr (chr9-128621199-C-T) – ACMG Classification: Benign (-19 pts)

Variant summary

Our verdict is Benign. The variant received -19 ACMG points: 0P and 19B. BP4_ModerateBP6_Very_StrongBP7BS1BS2

The NM_001130438.3(SPTAN1):c.5775C>T(p.Thr1925Thr) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00151 in 1,614,102 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 0.0013 ( 1 hom., cov: 32)

Exomes 𝑓: 0.0015 ( 3 hom. )

Consequence

SPTAN1
NM_001130438.3 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:9

Conservation

PhyloP100: -1.85

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 -19 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.34).

BP6

Variant 9-128621199-C-T is Benign according to our data. Variant chr9-128621199-C-T is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 139303.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=-1.85 with no splicing effect.

BS1

Variant frequency is greater than expected in population amr. GnomAd4 allele frequency = 0.00127 (193/152268) while in subpopulation AMR AF = 0.00373 (57/15288). AF 95% confidence interval is 0.00295. There are 1 homozygotes in GnomAd4. There are 93 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAdExome4 at 3 AD,AR 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.5775C>T	p.Thr1925Thr	synonymous	Exon 45 of 57	NP_001123910.1	Q13813-2
SPTAN1	NM_001375318.1		c.5811C>T	p.Thr1937Thr	synonymous	Exon 46 of 59	NP_001362247.1
SPTAN1	NM_001375310.1		c.5775C>T	p.Thr1925Thr	synonymous	Exon 45 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.5775C>T	p.Thr1925Thr	synonymous	Exon 45 of 57	ENSP00000361824.4	Q13813-2
SPTAN1	ENST00000372731.8	TSL:1	c.5760C>T	p.Thr1920Thr	synonymous	Exon 44 of 56	ENSP00000361816.4	Q13813-1
SPTAN1	ENST00000358161.9	TSL:1	c.5700C>T	p.Thr1900Thr	synonymous	Exon 43 of 55	ENSP00000350882.6	Q13813-3

Frequencies

GnomAD3 genomes

AF:

0.00127

AC:

193

AN:

152150

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000362

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00373

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:

0.00172

Gnomad OTH

AF:

0.00191

GnomAD2 exomes

AF:

0.000863

AC:

217

AN:

251450

AF XY:

0.000773

show subpopulations

Gnomad AFR exome

AF:

0.000308

Gnomad AMR exome

AF:

0.00145

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000924

Gnomad NFE exome

AF:

0.00137

Gnomad OTH exome

AF:

0.000651

GnomAD4 exome

AF:

0.00153

AC:

2242

AN:

1461834

Hom.:

Cov.:

AF XY:

0.00148

AC XY:

1076

AN XY:

727220

show subpopulations

African (AFR)

AF:

0.000448

AC:

AN:

33480

American (AMR)

AF:

0.00154

AC:

AN:

44718

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86250

European-Finnish (FIN)

AF:

0.000112

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5740

European-Non Finnish (NFE)

AF:

0.00183

AC:

2031

AN:

1112004

Other (OTH)

AF:

0.00200

AC:

121

AN:

60386

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.460

Heterozygous variant carriers

122

244

366

488

610

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

156

234

312

390

<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:

0.00127

AC:

193

AN:

152268

Hom.:

Cov.:

AF XY:

0.00125

AC XY:

AN XY:

74456

show subpopulations

African (AFR)

AF:

0.000361

AC:

AN:

41536

American (AMR)

AF:

0.00373

AC:

AN:

15288

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5184

South Asian (SAS)

AF:

0.00

AC:

AN:

4822

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10614

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00172

AC:

117

AN:

68034

Other (OTH)

AF:

0.00189

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.505

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

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:

0.00136

Hom.:

Bravo

AF:

0.00133

EpiCase

AF:

0.00153

EpiControl

AF:

0.00142

ClinVar

ClinVar submissions

Significance:Benign/Likely benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

not specified (3)

Developmental and epileptic encephalopathy, 5 (2)

not provided (2)

Developmental and epileptic encephalopathy (1)

Inborn genetic diseases (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.34

CADD

Benign

4.8

(source)

DANN

Benign

0.65

PhyloP100

-1.9

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

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