rs143433500

Variant names:

Variant summary

Our verdict is Benign. The variant received -9 ACMG points: 0P and 9B. BP4_StrongBP6BS1

The NM_014363.6(SACS):c.2497G>A(p.Glu833Lys) variant causes a missense change. The variant allele was found at a frequency of 0.000128 in 1,609,030 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00044 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000095 ( 1 hom. )

Consequence

SACS
NM_014363.6 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:4

Conservation

PhyloP100: 5.81

Publications

4 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: Labcorp Genetics (formerly Invitae), Laboratory for Molecular Medicine, PanelApp Australia, G2P, Myriad Women’s Health, Orphanet

SACS links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -9 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.011221975).

BP6

Variant 13-23341379-C-T is Benign according to our data. Variant chr13-23341379-C-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 311555.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00044 (67/152332) while in subpopulation AFR AF = 0.00156 (65/41584). AF 95% confidence interval is 0.00126. There are 0 homozygotes in GnomAd4. There are 36 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_014363.6. 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.2497G>A	p.Glu833Lys	missense	Exon 10 of 10	NP_055178.3
SACS	NM_001437336.1		c.2524G>A	p.Glu842Lys	missense	Exon 11 of 11	NP_001424265.1	A0A804HIQ1
SACS	NM_001278055.2		c.2056G>A	p.Glu686Lys	missense	Exon 8 of 8	NP_001264984.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
SACS	ENST00000382292.9	TSL:5 MANE Select	c.2497G>A	p.Glu833Lys	missense	Exon 10 of 10	ENSP00000371729.3	Q9NZJ4-1
SACS	ENST00000455470.6	TSL:1	c.2431+66G>A		intron	N/A	ENSP00000406565.2	H0Y6M8
SACS	ENST00000682944.1		c.2524G>A	p.Glu842Lys	missense	Exon 11 of 11	ENSP00000507173.1	A0A804HIQ1

Frequencies

GnomAD3 genomes

AF:

0.000420

AC:

AN:

152214

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00150

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000145

AC:

AN:

248958

AF XY:

0.000149

show subpopulations

Gnomad AFR exome

AF:

0.00167

Gnomad AMR exome

AF:

0.0000586

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000885

Gnomad OTH exome

AF:

0.000331

GnomAD4 exome

AF:

0.0000954

AC:

139

AN:

1456698

Hom.:

Cov.:

AF XY:

0.0000967

AC XY:

AN XY:

723860

show subpopulations

African (AFR)

AF:

0.00271

AC:

AN:

33194

American (AMR)

AF:

0.000136

AC:

AN:

44218

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26012

East Asian (EAS)

AF:

0.00

AC:

AN:

39636

South Asian (SAS)

AF:

0.000152

AC:

AN:

85292

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53342

Middle Eastern (MID)

AF:

0.000174

AC:

AN:

5738

European-Non Finnish (NFE)

AF:

0.00000361

AC:

AN:

1109096

Other (OTH)

AF:

0.000415

AC:

AN:

60170

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.487

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:

0.000440

AC:

AN:

152332

Hom.:

Cov.:

AF XY:

0.000483

AC XY:

AN XY:

74494

show subpopulations

African (AFR)

AF:

0.00156

AC:

AN:

41584

American (AMR)

AF:

0.0000654

AC:

AN:

15298

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5192

South Asian (SAS)

AF:

0.000207

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10614

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68026

Other (OTH)

AF:

0.00

AC:

AN:

2110

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.508

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:

0.000113

Hom.:

Bravo

AF:

0.000465

ESP6500AA

AF:

0.00159

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000198

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

ClinVar submissions

Significance:Conflicting classifications of pathogenicity

Revision:criteria provided, conflicting classifications

View on ClinVar

Pathogenic

VUS

Benign

Condition

Charlevoix-Saguenay spastic ataxia (3)

not provided (1)

Spastic paraplegia (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.27

BayesDel_addAF

Benign

-0.21

BayesDel_noAF

Uncertain

-0.070

CADD

Uncertain

(source)

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.22

Eigen

Uncertain

0.55

Eigen_PC

Uncertain

0.61

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.95

M_CAP

Benign

0.050

MetaRNN

Benign

0.011

MetaSVM

Uncertain

-0.065

MutationAssessor

Benign

1.9

PhyloP100

5.8

PrimateAI

Uncertain

0.57

PROVEAN

Benign

-1.2

REVEL

Uncertain

0.41

Sift

Benign

0.12

Sift4G

Pathogenic

0.0

Polyphen

0.94

Vest4

0.51

MVP

0.90

ClinPred

0.015

GERP RS

6.0

Varity_R

0.11

gMVP

0.52

Mutation Taster

=98/2

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