Genetic Variant CASP9:p.Ala331Thr (chr1-15495330-C-T) – ACMG Classification: Likely_benign (-4 pts)

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 0P and 4B. BS2

The NM_001229.5(CASP9):c.991G>A(p.Ala331Thr) variant causes a missense change. The variant allele was found at a frequency of 0.000023 in 1,610,582 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 29)

Exomes 𝑓: 0.000023 ( 0 hom. )

Consequence

CASP9
NM_001229.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 6.83

Variant links:

Genes affected

CASP9 (HGNC:1511): (caspase 9) This gene encodes a member of the cysteine-aspartic acid protease (caspase) family. Sequential activation of caspases plays a central role in the execution-phase of cell apoptosis. Caspases exist as inactive proenzymes which undergo proteolytic processing at conserved aspartic residues to produce two subunits, large and small, that dimerize to form the active enzyme. This protein can undergo autoproteolytic processing and activation by the apoptosome, a protein complex of cytochrome c and the apoptotic peptidase activating factor 1; this step is thought to be one of the earliest in the caspase activation cascade. This protein is thought to play a central role in apoptosis and to be a tumor suppressor. Alternative splicing results in multiple transcript variants. [provided by RefSeq, May 2013]

CASP9 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -4 ACMG points.

BS2

High AC in GnomAdExome4 at 34 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CASP9	NM_001229.5 link	c.991G>A	p.Ala331Thr	missense_variant	Exon 7 of 9	ENST00000333868.10	NP_001220.2	P55211-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CASP9	ENST00000333868.10 link	c.991G>A	p.Ala331Thr	missense_variant	Exon 7 of 9	1	NM_001229.5	ENSP00000330237.5		P55211-1

Frequencies

GnomAD3 genomes

AF:

0.0000199

AC:

AN:

150764

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000489

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000669

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

GnomAD3 exomes

AF:

0.0000242

AC:

AN:

247814

Hom.:

AF XY:

0.0000373

AC XY:

AN XY:

133916

show subpopulations

Gnomad AFR exome

AF:

0.0000632

Gnomad AMR exome

AF:

0.0000294

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000667

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000178

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000233

AC:

AN:

1459818

Hom.:

Cov.:

AF XY:

0.0000234

AC XY:

AN XY:

726008

show subpopulations

Gnomad4 AFR exome

AF:

0.0000300

Gnomad4 AMR exome

AF:

0.0000225

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000233

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000270

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000199

AC:

AN:

150764

Hom.:

Cov.:

AF XY:

0.0000409

AC XY:

AN XY:

73404

show subpopulations

Gnomad4 AFR

AF:

0.0000489

Gnomad4 AMR

AF:

0.0000669

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

Alfa

AF:

0.0000282

Hom.:

Bravo

AF:

0.0000113

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000259

AC:

ExAC

AF:

0.0000165

AC:

EpiCase

AF:

0.0000546

EpiControl

AF:

0.0000596

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Feb 25, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.991G>A (p.A331T) alteration is located in exon 7 (coding exon 7) of the CASP9 gene. This alteration results from a G to A substitution at nucleotide position 991, causing the alanine (A) at amino acid position 331 to be replaced by a threonine (T). 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

-0.087

BayesDel_noAF

Benign

-0.18

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.17

.;T;.;.;T

Eigen

Uncertain

0.33

Eigen_PC

Benign

0.17

FATHMM_MKL

Uncertain

0.96

LIST_S2

Uncertain

0.88

D;D;D;D;D

M_CAP

Benign

0.056

MetaRNN

Uncertain

0.57

D;D;D;D;D

MetaSVM

Benign

-0.96

MutationAssessor

Uncertain

2.2

.;M;.;.;.

PrimateAI

Uncertain

0.51

PROVEAN

Uncertain

-2.6

D;D;D;D;D

REVEL

Uncertain

0.31

Sift

Uncertain

0.0030

D;D;D;D;D

Sift4G

Uncertain

0.017

D;D;D;D;.

Polyphen

1.0

D;D;D;.;.

Vest4

0.47

MutPred

0.48

Gain of glycosylation at A331 (P = 0.0453);Gain of glycosylation at A331 (P = 0.0453);.;.;.;

MVP

0.78

MPC

0.56

ClinPred

0.91

GERP RS

4.1

Varity_R

0.41

gMVP

0.46

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