rs1033188876

Variant names:

Your query was ambiguous. Multiple possible variants found:

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 3P and 1B. PM2PP3BP6

The NM_001278055.2(SACS):c.-220C>T variant causes a 5 prime UTR premature start codon gain change. The variant allele was found at a frequency of 0.0000824 in 1,504,250 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.000039 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000087 ( 0 hom. )

Consequence

SACS
NM_001278055.2 5_prime_UTR_premature_start_codon_gain

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:1

Conservation

PhyloP100: 3.61

Publications

0 publications found

Variant links:

Genes affected

SACS (HGNC:10519): (sacsin molecular chaperone) This gene encodes the sacsin protein, which includes a UbL domain at the N-terminus, a DnaJ domain, and a HEPN domain at the C-terminus. The gene is highly expressed in the central nervous system, also found in skin, skeletal muscles and at low levels in the pancreas. This gene includes a very large exon spanning more than 12.8 kb. Mutations in this gene result in autosomal recessive spastic ataxia of Charlevoix-Saguenay (ARSACS), a neurodegenerative disorder characterized by early-onset cerebellar ataxia with spasticity and peripheral neuropathy. The authors of a publication on the effects of siRNA-mediated sacsin knockdown concluded that sacsin protects against mutant ataxin-1 and suggest that "the large multi-domain sacsin protein is able to recruit Hsp70 chaperone action and has the potential to regulate the effects of other ataxia proteins" (Parfitt et al., PubMed: 19208651). A pseudogene associated with this gene is located on chromosome 11. Alternative splicing of this gene results in multiple transcript variants. [provided by RefSeq, May 2013]

SACS Gene-Disease associations (from GenCC):

Charlevoix-Saguenay spastic ataxia
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Myriad Women's Health, Labcorp Genetics (formerly Invitae), G2P, PanelApp Australia, Laboratory for Molecular Medicine, Orphanet

SACS links:

Genome browser will be placed here

new If you want to explore the variant's impact on the transcript NM_001278055.2, check out the Mutation Effect Viewer. This is especially useful for frameshift variants or if you want to visualize the effect of exon loss / intron retention.

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.775

BP6

Variant 13-23375156-G-A is Benign according to our data. Variant chr13-23375156-G-A is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 448193.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001278055.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
SACS	NM_014363.6	MANE Select	c.134C>T	p.Pro45Leu	missense	Exon 3 of 10	NP_055178.3
SACS	NM_001278055.2		c.-220C>T		5_prime_UTR_premature_start_codon_gain	Exon 2 of 8	NP_001264984.1
SACS	NM_001437336.1		c.134C>T	p.Pro45Leu	missense	Exon 3 of 11	NP_001424265.1	A0A804HIQ1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
SACS	ENST00000382292.9	TSL:5 MANE Select	c.134C>T	p.Pro45Leu	missense	Exon 3 of 10	ENSP00000371729.3	Q9NZJ4-1
SACS	ENST00000455470.6	TSL:1	c.134C>T	p.Pro45Leu	missense	Exon 3 of 11	ENSP00000406565.2	H0Y6M8
SACS	ENST00000402364.1	TSL:2	c.-2029C>T		5_prime_UTR_premature_start_codon_gain	Exon 2 of 8	ENSP00000385844.1	Q9NZJ4-2

Frequencies

GnomAD3 genomes

AF:

0.0000395

AC:

AN:

152032

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000883

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000300

AC:

AN:

99918

AF XY:

0.0000180

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000897

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000873

AC:

118

AN:

1352218

Hom.:

Cov.:

AF XY:

0.0000870

AC XY:

AN XY:

666836

show subpopulations

African (AFR)

AF:

0.0000368

AC:

AN:

27144

American (AMR)

AF:

0.00

AC:

AN:

29614

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

23730

East Asian (EAS)

AF:

0.00

AC:

AN:

29228

South Asian (SAS)

AF:

0.0000267

AC:

AN:

74802

European-Finnish (FIN)

AF:

0.00

AC:

AN:

47372

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5570

European-Non Finnish (NFE)

AF:

0.000108

AC:

114

AN:

1058986

Other (OTH)

AF:

0.0000179

AC:

AN:

55772

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.479

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome 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

GnomAD4 genome

AF:

0.0000395

AC:

AN:

152032

Hom.:

Cov.:

AF XY:

0.0000404

AC XY:

AN XY:

74258

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41412

American (AMR)

AF:

0.00

AC:

AN:

15272

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5198

South Asian (SAS)

AF:

0.00

AC:

AN:

4832

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10558

Middle Eastern (MID)

AF:

0.00

AC:

AN:

314

European-Non Finnish (NFE)

AF:

0.0000883

AC:

AN:

67976

Other (OTH)

AF:

0.00

AC:

AN:

2086

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

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:

0.0000847

Hom.:

Bravo

AF:

0.0000302

ClinVar

ClinVar submissions

Significance:Conflicting classifications of pathogenicity

Revision:criteria provided, conflicting classifications

View on ClinVar

Pathogenic

VUS

Benign

Condition

Charlevoix-Saguenay spastic ataxia (1)

not specified (1)

Spastic paraplegia (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.17

BayesDel_addAF

Pathogenic

0.22

BayesDel_noAF

Uncertain

0.080

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.19

Eigen

Uncertain

0.53

Eigen_PC

Uncertain

0.47

FATHMM_MKL

Uncertain

0.91

LIST_S2

Uncertain

0.91

M_CAP

Pathogenic

0.94

MetaRNN

Pathogenic

0.78

MetaSVM

Uncertain

0.21

MutationAssessor

Uncertain

2.9

PhyloP100

3.6

PrimateAI

Uncertain

0.75

PROVEAN

Benign

-0.93

REVEL

Uncertain

0.62

Sift

Pathogenic

0.0

Sift4G

Pathogenic

0.0

PromoterAI

0.25

Neutral

(source)

RBP_binding_hub_radar

0.92

RBP_regulation_power_radar

2.7

Varity_R

0.57

gMVP

0.84

Mutation Taster

=67/33

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

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