dbSNP rs143844598: SPTAN1:p.Pro1304Pro (chr9-128605343-C-T) – ACMG Classification: Benign (-21 pts)

Variant summary

Our verdict is Benign. The variant received -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BS1BS2

The NM_001130438.3(SPTAN1):c.3912C>T(p.Pro1304Pro) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000576 in 1,614,048 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.00043 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00059 ( 2 hom. )

Consequence

SPTAN1
NM_001130438.3 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:7

Conservation

PhyloP100: -2.55

Publications

0 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:

ENSG00000297241 (HGNC:):

ENSG00000297241 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -21 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.68).

BP6

Variant 9-128605343-C-T is Benign according to our data. Variant chr9-128605343-C-T is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 139287.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=-2.55 with no splicing effect.

BS1

Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.000427 (65/152158) while in subpopulation NFE AF = 0.000485 (33/68042). AF 95% confidence interval is 0.000354. There are 0 homozygotes in GnomAd4. There are 30 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAdExome4 at 2 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.3912C>T	p.Pro1304Pro	synonymous	Exon 31 of 57	NP_001123910.1	Q13813-2
SPTAN1	NM_001375318.1		c.3948C>T	p.Pro1316Pro	synonymous	Exon 32 of 59	NP_001362247.1
SPTAN1	NM_001375310.1		c.3912C>T	p.Pro1304Pro	synonymous	Exon 31 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.3912C>T	p.Pro1304Pro	synonymous	Exon 31 of 57	ENSP00000361824.4	Q13813-2
SPTAN1	ENST00000372731.8	TSL:1	c.3912C>T	p.Pro1304Pro	synonymous	Exon 31 of 56	ENSP00000361816.4	Q13813-1
SPTAN1	ENST00000358161.9	TSL:1	c.3852C>T	p.Pro1284Pro	synonymous	Exon 30 of 55	ENSP00000350882.6	Q13813-3

Frequencies

GnomAD3 genomes

AF:

0.000427

AC:

AN:

152158

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000966

Gnomad AMI

AF:

0.0285

Gnomad AMR

AF:

0.0000655

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:

0.000485

Gnomad OTH

AF:

0.000478

GnomAD2 exomes

AF:

0.000255

AC:

AN:

251334

AF XY:

0.000287

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000924

Gnomad NFE exome

AF:

0.000528

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000591

AC:

864

AN:

1461890

Hom.:

Cov.:

AF XY:

0.000582

AC XY:

423

AN XY:

727246

show subpopulations

African (AFR)

AF:

0.0000597

AC:

AN:

33480

American (AMR)

AF:

0.0000224

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:

0.0000348

AC:

AN:

86256

European-Finnish (FIN)

AF:

0.0000936

AC:

AN:

53418

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.000731

AC:

813

AN:

1112012

Other (OTH)

AF:

0.000662

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.477

Heterozygous variant carriers

117

176

234

293

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

102

136

170

<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:

0.000427

AC:

AN:

152158

Hom.:

Cov.:

AF XY:

0.000404

AC XY:

AN XY:

74316

show subpopulations

African (AFR)

AF:

0.0000966

AC:

AN:

41428

American (AMR)

AF:

0.0000655

AC:

AN:

15278

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5186

South Asian (SAS)

AF:

0.00

AC:

AN:

4832

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10598

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.000485

AC:

AN:

68042

Other (OTH)

AF:

0.000478

AC:

AN:

2094

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.517

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:

0.000274

Hom.:

Bravo

AF:

0.000442

EpiCase

AF:

0.000600

EpiControl

AF:

0.000415

ClinVar

ClinVar submissions

Significance:Benign/Likely benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

not provided (2)

not specified (2)

Developmental and epileptic encephalopathy (1)

Developmental and epileptic encephalopathy, 5 (1)

SPTAN1-related disorder (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.68

CADD

Benign

0.93

(source)

DANN

Benign

0.49

PhyloP100

-2.5

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

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