dbSNP rs216541: SPAST:c.1245+2002A>G (chr2-32130481-A-G) – ACMG Classification: Benign (-12 pts)

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_StrongBA1

The NM_014946.4(SPAST):c.1245+2002A>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.999 in 152,280 control chromosomes in the GnomAD database, including 75,993 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 1.0 ( 75977 hom., cov: 31)

Exomes 𝑓: 1.0 ( 16 hom. )

Consequence

SPAST
NM_014946.4 intron

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -1.44

Publications

1 publications found

Variant links:

Genes affected

SPAST (HGNC:11233): (spastin) This gene encodes a member of the AAA (ATPases associated with a variety of cellular activities) protein family. Members of this protein family share an ATPase domain and have roles in diverse cellular processes including membrane trafficking, intracellular motility, organelle biogenesis, protein folding, and proteolysis. The use of alternative translational initiation sites in this gene results in a single transcript variant that can produce isoforms that differ in the length of their N-terminus and which thereby differ in the efficiency of their export from the nucleus to the cytoplasm. In addition, alternative splicing results in multiple transcript variants that encode isoforms that differ in other protein regions as well. One isoform of this gene has been shown to be a microtubule-severing enzyme that regulates microtubule abundance, mobility, and plus-end distribution. Mutations in this gene cause the most frequent form of autosomal dominant spastic paraplegia 4. [provided by RefSeq, May 2018]

SPAST Gene-Disease associations (from GenCC):

hereditary spastic paraplegia 4
Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), Illumina, Genomics England PanelApp, Ambry Genetics
Charlevoix-Saguenay spastic ataxia
Inheritance: AR Classification: DEFINITIVE Submitted by: G2P
neurodevelopmental disorder
Inheritance: AD Classification: STRONG Submitted by: G2P
SPAST-related motor disorder
Inheritance: AR Classification: STRONG Submitted by: Ambry Genetics

SPAST links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -12 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.95).

BA1

GnomAd4 highest subpopulation (NFE) allele frequency at 95% confidence interval = 0.994 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SPAST	NM_014946.4 link	c.1245+2002A>G		intron_variant	Intron 9 of 16	ENST00000315285.9	NP_055761.2	Q9UBP0-1E5KRP5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SPAST	ENST00000315285.9 link	c.1245+2002A>G		intron_variant	Intron 9 of 16	1	NM_014946.4	ENSP00000320885.3		Q9UBP0-1

Frequencies

GnomAD3 genomes

AF:

0.999

AC:

151983

AN:

152130

Hom.:

75919

Cov.:

show subpopulations

Gnomad AFR

AF:

0.997

Gnomad AMI

AF:

1.00

Gnomad AMR

AF:

1.00

Gnomad ASJ

AF:

1.00

Gnomad EAS

AF:

1.00

Gnomad SAS

AF:

1.00

Gnomad FIN

AF:

1.00

Gnomad MID

AF:

1.00

Gnomad NFE

AF:

1.00

Gnomad OTH

AF:

1.00

GnomAD4 exome

AF:

1.00

AC:

AN:

Hom.:

Cov.:

AF XY:

1.00

AC XY:

AN XY:

show subpopulations

African (AFR)

AF:

1.00

AC:

AN:

American (AMR)

AC:

AN:

Ashkenazi Jewish (ASJ)

AF:

1.00

AC:

AN:

East Asian (EAS)

AC:

AN:

South Asian (SAS)

AF:

1.00

AC:

AN:

European-Finnish (FIN)

AC:

AN:

Middle Eastern (MID)

AC:

AN:

European-Non Finnish (NFE)

AF:

1.00

AC:

AN:

Other (OTH)

AF:

1.00

AC:

AN:

GnomAD4 genome

AF:

0.999

AC:

152100

AN:

152248

Hom.:

75977

Cov.:

AF XY:

0.999

AC XY:

74370

AN XY:

74446

show subpopulations

African (AFR)

AF:

0.997

AC:

41398

AN:

41542

American (AMR)

AF:

1.00

AC:

15289

AN:

15292

Ashkenazi Jewish (ASJ)

AF:

1.00

AC:

3472

AN:

3472

East Asian (EAS)

AF:

1.00

AC:

5162

AN:

5162

South Asian (SAS)

AF:

1.00

AC:

4824

AN:

4824

European-Finnish (FIN)

AF:

1.00

AC:

10606

AN:

10606

Middle Eastern (MID)

AF:

1.00

AC:

294

AN:

294

European-Non Finnish (NFE)

AF:

1.00

AC:

68036

AN:

68036

Other (OTH)

AF:

1.00

AC:

2107

AN:

2108

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.501

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

916

1832

2748

3664

4580

<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:

1.00

Hom.:

8667

Bravo

AF:

0.999

Asia WGS

AF:

1.00

AC:

3477

AN:

3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.95

CADD

Benign

0.65

(source)

DANN

Benign

0.47

PhyloP100

-1.4

Mutation Taster

=100/0

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

ClinVar

Computational scores

Splicing

Publications

Other links and lift over