NM_033440.3:c.496A>T

Variant names:

• chr1-15466001-A-T
• NM_033440.3:c.496A>T

Variant summary

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

The NM_033440.3(CELA2A):​c.496A>T​(p.Asn166Tyr) variant causes a missense, splice region change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 1/1 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: CELA2A NM_033440.3 missense, splice_region
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.00

Genes affected

CELA2A (HGNC:24609): (chymotrypsin like elastase 2A) Elastases form a subfamily of serine proteases that hydrolyze many proteins in addition to elastin. Humans have six elastase genes which encode the structurally similar proteins elastase 1, 2, 2A, 2B, 3A, and 3B. Like most of the human elastases, elastase 2A is secreted from the pancreas as a zymogen. In other species, elastase 2A has been shown to preferentially cleave proteins after leucine, methionine, and phenylalanine residues. [provided by RefSeq, May 2009]

CELA2B (HGNC:29995): (chymotrypsin like elastase 2B) Elastases form a subfamily of serine proteases that hydrolyze many proteins in addition to elastin. Humans have six elastase genes which encode the structurally similar proteins elastase 1, 2, 2A, 2B, 3A, and 3B. Like most of the human elastases, elastase 2B is secreted from the pancreas as a zymogen. In other species, elastase 2B has been shown to preferentially cleave proteins after leucine, methionine, and phenylalanine residues. [provided by RefSeq, Jul 2008]

LOC105376767 (HGNC:):

ACMG classification

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
CELA2A	NM_033440.3	c.496A>T	p.Asn166Tyr	missense_variant, splice_region_variant	Exon 6 of 8	ENST00000359621.5	NP_254275.1
LOC105376767	XR_002958256.2	n.367-1129T>A		intron_variant	Intron 1 of 2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CELA2A	ENST00000359621.5	c.496A>T	p.Asn166Tyr	missense_variant, splice_region_variant	Exon 6 of 8	1	NM_033440.3	ENSP00000352639.4
CELA2B	ENST00000494280.1	n.93A>T		non_coding_transcript_exon_variant	Exon 1 of 6	5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Nov 17, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.496A>T (p.N166Y) alteration is located in exon 6 (coding exon 6) of the CELA2A gene. This alteration results from a A to T substitution at nucleotide position 496, causing the asparagine (N) at amino acid position 166 to be replaced by a tyrosine (Y). 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	0.19
BayesDel_addAF	Uncertain	0.12	D
BayesDel_noAF	Uncertain	-0.070
CADD	Benign	16
DANN	Uncertain	0.97
DEOGEN2	Uncertain	0.59	D
Eigen	Benign	0.043
Eigen_PC	Benign	-0.076
FATHMM_MKL	Uncertain	0.79	D
LIST_S2	Benign	0.71	T
M_CAP	Benign	0.061	D
MetaRNN	Uncertain	0.60	D
MetaSVM	Uncertain	0.41	D
MutationAssessor	Benign	1.5	L
PrimateAI	Benign	0.46	T
PROVEAN	Pathogenic	-5.8	D
REVEL	Pathogenic	0.65
Sift	Benign	0.067	T
Sift4G	Benign	0.35	T
Polyphen		0.99	D
Vest4		0.50
MutPred		0.56		Gain of solvent accessibility (P = 0.0971);
MVP		0.81
MPC		1.0
ClinPred		0.98	D
GERP RS		2.5
Varity_R		0.12
gMVP		0.68

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr1-15792496;