9-26884873-A-C

Variant names:

• chr9-26884873-A-C
• rs570695283
• NM_024828.4:c.602T>G

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_024828.4(CAAP1):​c.602T>G​(p.Met201Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000187 in 1,607,092 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.000013 (0 hom., cov: 32)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: CAAP1 NM_024828.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.31
• Publications: 0 publications found

Genes affected

CAAP1 (HGNC:25834): (caspase activity and apoptosis inhibitor 1) Involved in negative regulation of cysteine-type endopeptidase activity involved in apoptotic signaling pathway. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.14437068).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CAAP1	NM_024828.4	c.602T>G	p.Met201Arg	missense_variant	Exon 4 of 6	ENST00000333916.8	NP_079104.3
CAAP1	NM_001167575.2	c.167T>G	p.Met56Arg	missense_variant	Exon 4 of 6		NP_001161047.1
CAAP1	XM_047423896.1	c.602T>G	p.Met201Arg	missense_variant	Exon 4 of 6		XP_047279852.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CAAP1	ENST00000333916.8	c.602T>G	p.Met201Arg	missense_variant	Exon 4 of 6	1	NM_024828.4	ENSP00000369431.3

Frequencies

GnomAD3 genomes AF: 0.0000131 AC: 2 AN: 152142 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000655

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.000192

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

GnomAD2 exomes AF: 0.00000403 AC: 1 AN: 248206 AF XY: 0.00

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000290

Gnomad ASJ exome AF: 0.00

Gnomad EAS 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: 6.87e-7 AC: 1 AN: 1454832 Hom.: 0 Cov.: 29 AF XY: 0.00 AC XY: 0 AN XY: 724178

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 33406

American (AMR) AF: 0.0000224 AC: 1 AN: 44682

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26098

East Asian (EAS) AF: 0.00 AC: 0 AN: 39562

South Asian (SAS) AF: 0.00 AC: 0 AN: 86006

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 49722

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5754

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1109360

Other (OTH) AF: 0.00 AC: 0 AN: 60242

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome AF: 0.0000131 AC: 2 AN: 152260 Hom.: 0 Cov.: 32 AF XY: 0.0000134 AC XY: 1 AN XY: 74450

African (AFR) AF: 0.00 AC: 0 AN: 41566

American (AMR) AF: 0.0000654 AC: 1 AN: 15288

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3468

East Asian (EAS) AF: 0.000193 AC: 1 AN: 5190

South Asian (SAS) AF: 0.00 AC: 0 AN: 4826

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10596

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68012

Other (OTH) AF: 0.00 AC: 0 AN: 2108

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

May 27, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.602T>G (p.M201R) alteration is located in exon 4 (coding exon 4) of the CAAP1 gene. This alteration results from a T to G substitution at nucleotide position 602, causing the methionine (M) at amino acid position 201 to be replaced by an arginine (R). 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	0.13
BayesDel_addAF	Benign	-0.22	T
BayesDel_noAF	Benign	-0.48
CADD	Benign	18
DANN	Benign	0.97
DEOGEN2	Benign	0.010	T;.
Eigen	Benign	-0.45
Eigen_PC	Benign	-0.24
FATHMM_MKL	Uncertain	0.85	D
LIST_S2	Benign	0.72	T;T
M_CAP	Benign	0.013	T
MetaRNN	Benign	0.14	T;T
MetaSVM	Benign	-1.0	T
PhyloP100		2.3
PrimateAI	Benign	0.35	T
PROVEAN	Benign	-1.4	N;.
REVEL	Benign	0.054
Sift	Benign	0.052	T;.
Sift4G	Benign	0.10	T;T
Polyphen		0.091	B;.
Vest4		0.39
MutPred		0.24		Loss of stability (P = 0.0282);.;
MVP		0.36
MPC		0.28
ClinPred		0.81	D
GERP RS		4.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.26
gMVP		0.16
Mutation Taster		=78/22	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs570695283; hg19: chr9-26884871;