2-201258304-C-A

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 2P and 3B. PM2 BP4_Moderate BP6

The ENST00000358485.8(CASP8):c.73C>A(p.Pro25Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000684 in 1,461,848 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/18 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (no stars).

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0000068 (0 hom.)
• Consequence: CASP8 ENST00000358485.8 missense
• Clinical Significance: Likely benign no assertion criteria provided B:1
• Conservation: PhyloP100: -3.48

Genes affected

CASP8 (HGNC:1509): (caspase 8) 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 composed of a prodomain, a large protease subunit, and a small protease subunit. Activation of caspases requires proteolytic processing at conserved internal aspartic residues to generate a heterodimeric enzyme consisting of the large and small subunits. This protein is involved in the programmed cell death induced by Fas and various apoptotic stimuli. The N-terminal FADD-like death effector domain of this protein suggests that it may interact with Fas-interacting protein FADD. This protein was detected in the insoluble fraction of the affected brain region from Huntington disease patients but not in those from normal controls, which implicated the role in neurodegenerative diseases. Many alternatively spliced transcript variants encoding different isoforms have been described, although not all variants have had their full-length sequences determined. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Likely_benign. Variant got -1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.09938133).
• BP6: Variant 2-201258304-C-A is Benign according to our data. Variant chr2-201258304-C-A is described in ClinVar as [Likely_benign]. Clinvar id is 973626.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CASP8	NM_001080125.2	c.73C>A	p.Pro25Thr	missense_variant	1/9
CASP8	NM_001400642.1	c.73C>A	p.Pro25Thr	missense_variant	1/8
CASP8	NM_001400665.1	c.73C>A	p.Pro25Thr	missense_variant	1/6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CASP8	ENST00000358485.8	c.73C>A	p.Pro25Thr	missense_variant	1/9	1
CASP8	ENST00000264275.9	c.-26-8157C>A		intron_variant		1
CASP8	ENST00000392258.7	c.-26-8157C>A		intron_variant		1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 0.00000684 AC: 10 AN: 1461848 Hom.: 0 Cov.: 34 AF XY: 0.00000688 AC XY: 5 AN XY: 727232

Gnomad4 AFR exome AF: 0.00

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: 0.00000719

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome Cov.: 31

Alfa AF: 0.0000282 Hom.: 0

Bravo AF: 0.00000756

EpiCase AF: 0.000109

EpiControl AF: 0.00

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: no assertion criteria provided

Submissions by phenotype

Autoimmune lymphoproliferative syndrome type 2B Benign:1

Likely benign, no assertion criteria provided

clinical testing

UOSD Laboratory of Genetics & Genomics of Rare Diseases, Istituto Giannina Gaslini

May 21, 2020

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Benign	-0.24	T
BayesDel_noAF	Benign	-0.58
Cadd	Benign	0.42
Dann	Uncertain	0.99
Eigen	Benign	-0.83
Eigen_PC	Benign	-0.97
FATHMM_MKL	Benign	0.018	N
LIST_S2	Benign	0.35	T
M_CAP	Benign	0.0033	T
MetaRNN	Benign	0.099	T
MetaSVM	Benign	-0.94	T
MutationTaster	Benign	1.0	N;N;N;N;N;N;N
PrimateAI	Benign	0.23	T
PROVEAN	Benign	-0.060	N
REVEL	Benign	0.030
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		0.39	B
Vest4		0.090
MutPred		0.31		Loss of phosphorylation at T24 (P = 0.0531);
MVP		0.47
MPC		1.0
ClinPred		0.92	D
GERP RS		-0.096
gMVP		0.14

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

Publications

LitVar

Other links and lift over

dbSNP: rs201548238; hg19: chr2-202123027;