Genetic Variant CELA3B:p.Ile100Thr (chr1-21981109-T-C) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

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

The NM_007352.4(CELA3B):c.299T>C(p.Ile100Thr) variant causes a missense change. The variant allele was found at a frequency of 0.00000434 in 1,613,250 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 28)

Exomes 𝑓: 0.0000034 ( 0 hom. )

Consequence

CELA3B
NM_007352.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.78

Variant links:

Genes affected

CELA3B (HGNC:15945): (chymotrypsin like elastase 3B) 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. Unlike other elastases, elastase 3B has little elastolytic activity. Like most of the human elastases, elastase 3B is secreted from the pancreas as a zymogen and, like other serine proteases such as trypsin, chymotrypsin and kallikrein, it has a digestive function in the intestine. Elastase 3B preferentially cleaves proteins after alanine residues. Elastase 3B may also function in the intestinal transport and metabolism of cholesterol. Both elastase 3A and elastase 3B have been referred to as protease E and as elastase 1, and excretion of this protein in fecal material is frequently used as a measure of pancreatic function in clinical assays. [provided by RefSeq, May 2009]

CELA3B 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
CELA3B	NM_007352.4 link	c.299T>C	p.Ile100Thr	missense_variant	Exon 4 of 8	ENST00000337107.11	NP_031378.1	P08861

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
CELA3B	ENST00000337107.11 link	c.299T>C	p.Ile100Thr	missense_variant	Exon 4 of 8	1	NM_007352.4	ENSP00000338369.6	P08861
CELA3B	ENST00000400277.2 link	c.8T>C	p.Ile3Thr	missense_variant	Exon 1 of 5	5		ENSP00000383135.2	A0A0A0MSA6
CELA3B	ENST00000374666.1 link	n.350T>C		non_coding_transcript_exon_variant	Exon 4 of 5	3

Frequencies

GnomAD3 genomes

AF:

0.0000132

AC:

AN:

152084

Hom.:

Cov.:

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:

0.000386

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:

0.0000159

AC:

AN:

251478

Hom.:

AF XY:

0.00

AC XY:

AN XY:

135908

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000217

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:

0.00000342

AC:

AN:

1461166

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

726886

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:

8.99e-7

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000132

AC:

AN:

152084

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74290

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000386

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000378

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

May 18, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.299T>C (p.I100T) alteration is located in exon 4 (coding exon 4) of the CELA3B gene. This alteration results from a T to C substitution at nucleotide position 299, causing the isoleucine (I) at amino acid position 100 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

Pathogenic

0.94

BayesDel_addAF

Benign

-0.10

BayesDel_noAF

Benign

-0.090

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Benign

0.32

T;T

Eigen

Benign

-0.10

Eigen_PC

Benign

0.066

FATHMM_MKL

Uncertain

0.80

LIST_S2

Benign

0.70

T;T

M_CAP

Benign

0.076

MetaRNN

Uncertain

0.56

D;D

MetaSVM

Uncertain

0.16

MutationAssessor

Benign

1.5

L;.

PrimateAI

Uncertain

0.74

PROVEAN

Uncertain

-3.8

D;D

REVEL

Uncertain

0.40

Sift

Uncertain

0.014

D;D

Sift4G

Uncertain

0.017

D;D

Polyphen

0.0060

B;.

Vest4

0.37

MutPred

0.68

Gain of disorder (P = 0.0169);.;

MVP

0.38

MPC

0.75

ClinPred

0.78

GERP RS

4.9

Varity_R

0.85

gMVP

0.62

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