Genetic Variant ATXN2L:p.Thr143Ile (chr16-28825804-C-T) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_007245.4(ATXN2L):c.428C>T(p.Thr143Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000031 in 1,613,884 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000027 ( 0 hom. )

Consequence

ATXN2L
NM_007245.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.47

Variant links:

Genes affected

ATXN2L (HGNC:31326): (ataxin 2 like) This gene encodes an ataxin type 2 related protein of unknown function. This protein is a member of the spinocerebellar ataxia (SCAs) family, which is associated with a complex group of neurodegenerative disorders. Several alternatively spliced transcripts encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

ATXN2L links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.18805358).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ATXN2L	NM_007245.4 link	c.428C>T	p.Thr143Ile	missense_variant	Exon 4 of 22	ENST00000336783.9	NP_009176.2	Q8WWM7-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ATXN2L	ENST00000336783.9 link	c.428C>T	p.Thr143Ile	missense_variant	Exon 4 of 22	1	NM_007245.4	ENSP00000338718.4		Q8WWM7-1

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152108

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000274

AC:

AN:

1461776

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

727194

show subpopulations

Gnomad4 AFR exome

AF:

0.000119

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152108

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74312

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Feb 12, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.428C>T (p.T143I) alteration is located in exon 4 (coding exon 4) of the ATXN2L gene. This alteration results from a C to T substitution at nucleotide position 428, causing the threonine (T) at amino acid position 143 to be replaced by an isoleucine (I). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.28

BayesDel_addAF

Benign

-0.16

BayesDel_noAF

Benign

-0.47

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.085

.;.;.;T;.;T;.;.;.

Eigen

Benign

-0.082

Eigen_PC

Benign

-0.0084

FATHMM_MKL

Benign

0.40

LIST_S2

Uncertain

0.96

D;D;D;D;D;D;D;D;D

M_CAP

Benign

0.017

MetaRNN

Benign

0.19

T;T;T;T;T;T;T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

0.69

N;N;N;N;N;.;N;.;.

PrimateAI

Uncertain

0.71

PROVEAN

Benign

-1.8

N;N;N;N;N;N;N;N;N

REVEL

Benign

0.072

Sift

Benign

0.17

T;T;T;T;T;T;T;T;T

Sift4G

Uncertain

0.052

T;T;T;T;T;T;T;T;T

Polyphen

0.74

P;P;P;P;.;.;.;.;.

Vest4

0.24

MutPred

0.30

Loss of ubiquitination at K140 (P = 0.0594);Loss of ubiquitination at K140 (P = 0.0594);Loss of ubiquitination at K140 (P = 0.0594);Loss of ubiquitination at K140 (P = 0.0594);Loss of ubiquitination at K140 (P = 0.0594);Loss of ubiquitination at K140 (P = 0.0594);Loss of ubiquitination at K140 (P = 0.0594);.;.;

MVP

0.33

MPC

0.92

ClinPred

0.44

GERP RS

5.2

Varity_R

0.13

gMVP

0.52

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.060

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