rs376233432

Positions:

chr6-16327675-C-A

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 0P and 8B. BP4_StrongBS2

The NM_001128164.2(ATXN1):c.636G>T(p.Gln212His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000495 in 1,515,692 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000092 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000046 ( 0 hom. )

Consequence

ATXN1
NM_001128164.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 0.00

Variant links:

Genes affected

ATXN1 (HGNC:10548): (ataxin 1) The autosomal dominant cerebellar ataxias (ADCA) are a heterogeneous group of neurodegenerative disorders characterized by progressive degeneration of the cerebellum, brain stem and spinal cord. Clinically, ADCA has been divided into three groups: ADCA types I-III. ADCAI is genetically heterogeneous, with five genetic loci, designated spinocerebellar ataxia (SCA) 1, 2, 3, 4 and 6, being assigned to five different chromosomes. ADCAII, which always presents with retinal degeneration (SCA7), and ADCAIII often referred to as the `pure' cerebellar syndrome (SCA5), are most likely homogeneous disorders. Several SCA genes have been cloned and shown to contain CAG repeats in their coding regions. ADCA is caused by the expansion of the CAG repeats, producing an elongated polyglutamine tract in the corresponding protein. The expanded repeats are variable in size and unstable, usually increasing in size when transmitted to successive generations. The function of the ataxins is not known. This locus has been mapped to chromosome 6, and it has been determined that the diseased allele contains 40-83 CAG repeats, compared to 6-39 in the normal allele, and is associated with spinocerebellar ataxia type 1 (SCA1). Alternative splicing results in multiple transcript variants, with one variant encoding multiple distinct proteins, ATXN1 and Alt-ATXN1, due to the use of overlapping alternate reading frames. [provided by RefSeq, Nov 2017]

ATXN1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -8 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0496521).

BS2

High AC in GnomAd4 at 11 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ATXN1	NM_001128164.2 linkuse as main transcript	c.636G>T	p.Gln212His	missense_variant	7/8	ENST00000436367.6	NP_001121636.1	P54253-1Q96FF1
ATXN1	NM_000332.4 linkuse as main transcript	c.636G>T	p.Gln212His	missense_variant	8/9		NP_000323.2	P54253-1Q96FF1
ATXN1	NM_001357857.2 linkuse as main transcript	c.*49G>T		3_prime_UTR_variant	8/9		NP_001344786.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	UniProt
ATXN1	ENST00000436367.6 linkuse as main transcript	c.636G>T	p.Gln212His	missense_variant	7/8	1	NM_001128164.2	ENSP00000416360.1	P54253-1
ATXN1	ENST00000244769.8 linkuse as main transcript	c.636G>T	p.Gln212His	missense_variant	8/9	1		ENSP00000244769.3	P54253-1
ATXN1	ENST00000642969.1 linkuse as main transcript	c.*49G>T		downstream_gene_variant				ENSP00000493530.1	A0A2R8YCF3

Frequencies

GnomAD3 genomes

AF:

0.0000920

AC:

AN:

119624

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000280

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000844

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:

0.0000487

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000631

AC:

AN:

142684

Hom.:

AF XY:

0.0000630

AC XY:

AN XY:

79412

show subpopulations

Gnomad AFR exome

AF:

0.000317

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000238

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000305

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000458

AC:

AN:

1395978

Hom.:

Cov.:

120

AF XY:

0.0000403

AC XY:

AN XY:

694028

show subpopulations

Gnomad4 AFR exome

AF:

0.000150

Gnomad4 AMR exome

AF:

0.0000500

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000573

Gnomad4 SAS exome

AF:

0.0000368

Gnomad4 FIN exome

AF:

0.0000917

Gnomad4 NFE exome

AF:

0.0000444

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000919

AC:

AN:

119714

Hom.:

Cov.:

AF XY:

0.000103

AC XY:

AN XY:

58180

show subpopulations

Gnomad4 AFR

AF:

0.000279

Gnomad4 AMR

AF:

0.0000843

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000487

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.00927

Hom.:

ExAC

AF:

0.0000305

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Genetic Services Laboratory, University of Chicago

Apr 04, 2014

- -

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 01, 2024

The c.636G>T (p.Q212H) alteration is located in exon 8 (coding exon 1) of the ATXN1 gene. This alteration results from a G to T substitution at nucleotide position 636, causing the glutamine (Q) at amino acid position 212 to be replaced by a histidine (H). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

not provided

Breakthrough Genomics, Breakthrough Genomics

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.17

BayesDel_addAF

Benign

-0.15

BayesDel_noAF

Benign

-0.45

CADD

Benign

9.0

DANN

Benign

0.84

DEOGEN2

Benign

0.32

T;T

Eigen

Benign

-0.96

Eigen_PC

Benign

-1.2

FATHMM_MKL

Benign

0.019

LIST_S2

Benign

0.19

.;T

M_CAP

Benign

0.066

MetaRNN

Benign

0.050

T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.0

N;N

PrimateAI

Uncertain

0.50

PROVEAN

Benign

0.25

N;N

REVEL

Benign

0.0090

Sift

Benign

0.10

T;T

Sift4G

Uncertain

0.0050

D;D

Vest4

0.18

MutPred

0.24

Loss of helix (P = 0.2271);Loss of helix (P = 0.2271);

MVP

0.72

MPC

0.39

ClinPred

0.030

Varity_R

0.13

gMVP

0.41

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

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over