Genetic Variant ATG4A:p.Thr176Ile (chrX-108137150-C-T) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_052936.5(ATG4A):c.527C>T(p.Thr176Ile) variant causes a missense change. The variant allele was found at a frequency of 0.00000332 in 1,204,803 control chromosomes in the GnomAD database, with no homozygous occurrence. There are no hemizygote samples in GnomAD. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.0000089 ( 0 hom., 0 hem., cov: 23)

Exomes 𝑓: 0.0000027 ( 0 hom. 0 hem. )

Consequence

ATG4A
NM_052936.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.12

Variant links:

Genes affected

ATG4A (HGNC:16489): (autophagy related 4A cysteine peptidase) Autophagy is the process by which endogenous proteins and damaged organelles are destroyed intracellularly. Autophagy is postulated to be essential for cell homeostasis and cell remodeling during differentiation, metamorphosis, non-apoptotic cell death, and aging. Reduced levels of autophagy have been described in some malignant tumors, and a role for autophagy in controlling the unregulated cell growth linked to cancer has been proposed. This gene encodes a member of the autophagin protein family. The encoded protein is also designated as a member of the C-54 family of cysteine proteases. [provided by RefSeq, Mar 2016]

ATG4A links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ATG4A	NM_052936.5 link	c.527C>T	p.Thr176Ile	missense_variant	Exon 7 of 13	ENST00000372232.8	NP_443168.2	Q8WYN0-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ATG4A	ENST00000372232.8 link	c.527C>T	p.Thr176Ile	missense_variant	Exon 7 of 13	1	NM_052936.5	ENSP00000361306.3		Q8WYN0-1

Frequencies

GnomAD3 genomes

AF:

0.00000886

AC:

AN:

112870

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

35036

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:

0.000276

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

GnomAD3 exomes

AF:

0.0000167

AC:

AN:

179833

Hom.:

AF XY:

0.00

AC XY:

AN XY:

64441

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000223

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000275

AC:

AN:

1091933

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

357633

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000101

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:

0.00000886

AC:

AN:

112870

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

35036

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000276

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

ExAC

AF:

0.0000247

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Dec 24, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.527C>T (p.T176I) alteration is located in exon 7 (coding exon 7) of the ATG4A gene. This alteration results from a C to T substitution at nucleotide position 527, causing the threonine (T) at amino acid position 176 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

Pathogenic

0.80

BayesDel_addAF

Benign

0.000065

BayesDel_noAF

Uncertain

0.060

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.14

T;.;.

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.92

D;D;D

M_CAP

Pathogenic

0.50

MetaRNN

Uncertain

0.67

D;D;D

MetaSVM

Benign

-0.63

MutationAssessor

Benign

1.6

L;L;.

PrimateAI

Uncertain

0.78

PROVEAN

Uncertain

-4.2

D;D;D

REVEL

Uncertain

0.31

Sift

Benign

0.11

T;D;T

Sift4G

Benign

0.19

T;T;T

Polyphen

0.62

P;P;.

Vest4

0.93

MutPred

0.72

Loss of loop (P = 0.0986);Loss of loop (P = 0.0986);.;

MVP

0.59

MPC

1.2

ClinPred

0.71

GERP RS

6.1

Varity_R

0.65

gMVP

0.87

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.21

Details are displayed if max score is > 0.2

DS_DL_spliceai

0.21

Position offset: 20

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