16-680668-G-A

Position:

chr16-680668-G-A

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 2P and 3B. PM1BP4_ModerateBS1_Supporting

The ENST00000219548.9(STUB1):c.143G>A(p.Cys48Tyr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000753 in 1,287,426 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 (★★). Synonymous variant affecting the same amino acid position (i.e. C48C) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.000086 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000074 ( 0 hom. )

Consequence

STUB1
ENST00000219548.9 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 3.18

Variant links:

Genes affected

STUB1 (HGNC:11427): (STIP1 homology and U-box containing protein 1) This gene encodes a protein containing tetratricopeptide repeat and a U-box that functions as a ubiquitin ligase/cochaperone. The encoded protein binds to and ubiquitinates shock cognate 71 kDa protein (Hspa8) and DNA polymerase beta (Polb), among other targets. Mutations in this gene cause spinocerebellar ataxia, autosomal recessive 16. Alternative splicing results in multiple transcript variants. There is a pseudogene for this gene on chromosome 2. [provided by RefSeq, Jun 2014]

STUB1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -1 ACMG points.

PM1

In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 3 uncertain in ENST00000219548.9

BP4

Computational evidence support a benign effect (MetaRNN=0.12081236).

BS1

Variant frequency is greater than expected in population mid. gnomad4_exome allele frequency = 0.0000739 (84/1136162) while in subpopulation MID AF= 0.00311 (14/4498). AF 95% confidence interval is 0.00188. There are 0 homozygotes in gnomad4_exome. There are 39 alleles in male gnomad4_exome subpopulation. Median coverage is 31. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
STUB1	NM_005861.4 linkuse as main transcript	c.143G>A	p.Cys48Tyr	missense_variant	1/7	ENST00000219548.9	NP_005852.2
STUB1	NM_001293197.2 linkuse as main transcript	c.-163G>A		5_prime_UTR_variant	1/7		NP_001280126.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
STUB1	ENST00000219548.9 linkuse as main transcript	c.143G>A	p.Cys48Tyr	missense_variant	1/7	1	NM_005861.4	ENSP00000219548	P1	Q9UNE7-1

Frequencies

GnomAD3 genomes

AF:

0.0000859

AC:

AN:

151264

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000242

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00202

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000738

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000144

AC:

AN:

62668

Hom.:

AF XY:

0.000190

AC XY:

AN XY:

36752

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00173

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000125

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000739

AC:

AN:

1136162

Hom.:

Cov.:

AF XY:

0.0000712

AC XY:

AN XY:

547758

show subpopulations

Gnomad4 AFR exome

AF:

0.0000427

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00120

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000296

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000446

Gnomad4 OTH exome

AF:

0.000158

GnomAD4 genome

AF:

0.0000859

AC:

AN:

151264

Hom.:

Cov.:

AF XY:

0.0000677

AC XY:

AN XY:

73866

show subpopulations

Gnomad4 AFR

AF:

0.0000242

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00202

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000738

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000712

Hom.:

Bravo

AF:

0.0000453

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000121

AC:

ExAC

AF:

0.0000881

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Sep 08, 2022

Variant summary: STUB1 c.143G>A (p.Cys48Tyr) results in a non-conservative amino acid change in the encoded protein sequence. Three of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 0.00014 in 62668 control chromosomes (gnomAD). The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. To our knowledge, no occurrence of c.143G>A in individuals affected with Autosomal Recessive Spinocerebellar Ataxia 16 and no experimental evidence demonstrating its impact on protein function have been reported. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014. Based on the evidence outlined above, the variant was classified as uncertain significance. -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Apr 10, 2023

In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt STUB1 protein function. ClinVar contains an entry for this variant (Variation ID: 1722413). This variant has not been reported in the literature in individuals affected with STUB1-related conditions. The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This sequence change replaces cysteine, which is neutral and slightly polar, with tyrosine, which is neutral and polar, at codon 48 of the STUB1 protein (p.Cys48Tyr). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.46

BayesDel_addAF

Pathogenic

0.17

BayesDel_noAF

Uncertain

0.010

CADD

Uncertain

DANN

Uncertain

0.98

DEOGEN2

Pathogenic

0.89

D;.

Eigen

Benign

-0.13

Eigen_PC

Benign

-0.028

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.88

D;D

M_CAP

Pathogenic

0.88

MetaRNN

Benign

0.12

T;T

MetaSVM

Benign

-0.96

MutationAssessor

Benign

1.5

L;.

MutationTaster

Benign

1.0

D;D;D;D

PrimateAI

Pathogenic

0.94

PROVEAN

Pathogenic

-6.2

D;D

REVEL

Uncertain

0.36

Sift

Benign

0.069

T;D

Sift4G

Benign

0.59

T;D

Polyphen

0.82

P;.

Vest4

0.55

MVP

0.45

MPC

1.7

ClinPred

0.17

GERP RS

3.7

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.89

gMVP

0.63

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