Genetic Variant NM_001872.5:c.1081A>G (chr13-46055768-T-C) – ACMG Classification: Uncertain_significance (1 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BP4

The NM_001872.5(CPB2):c.1081A>G(p.Thr361Ala) variant causes a missense change. The variant allele was found at a frequency of 0.0000197 in 1,421,826 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.000020 ( 0 hom. )

Consequence

CPB2
NM_001872.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.89

Variant links:

Genes affected

CPB2 (HGNC:2300): (carboxypeptidase B2) Carboxypeptidases are enzymes that hydrolyze C-terminal peptide bonds. The carboxypeptidase family includes metallo-, serine, and cysteine carboxypeptidases. According to their substrate specificity, these enzymes are referred to as carboxypeptidase A (cleaving aliphatic residues) or carboxypeptidase B (cleaving basic amino residues). The protein encoded by this gene is activated by trypsin and acts on carboxypeptidase B substrates. After thrombin activation, the mature protein downregulates fibrinolysis. Polymorphisms have been described for this gene and its promoter region. Alternate splicing results in multiple transcript variants. [provided by RefSeq, Jun 2013]

CPB2 links:

CPB2-AS1 (HGNC:39898): (CPB2 antisense RNA 1)

CPB2-AS1 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.3103948).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CPB2	NM_001872.5 link	c.1081A>G	p.Thr361Ala	missense_variant	Exon 10 of 11	ENST00000181383.10	NP_001863.3	Q96IY4-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CPB2	ENST00000181383.10 link	c.1081A>G	p.Thr361Ala	missense_variant	Exon 10 of 11	1	NM_001872.5	ENSP00000181383.4		Q96IY4-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000821

AC:

AN:

243556

Hom.:

AF XY:

0.00000759

AC XY:

AN XY:

131770

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000179

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000197

AC:

AN:

1421826

Hom.:

Cov.:

AF XY:

0.0000169

AC XY:

AN XY:

709004

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000250

Gnomad4 OTH exome

AF:

0.0000170

GnomAD4 genome

Cov.:

Alfa

AF:

0.0000565

Hom.:

Bravo

AF:

0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jan 20, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1081A>G (p.T361A) alteration is located in exon 10 (coding exon 10) of the CPB2 gene. This alteration results from a A to G substitution at nucleotide position 1081, causing the threonine (T) at amino acid position 361 to be replaced by an alanine (A). 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

0.096

BayesDel_addAF

Benign

-0.30

BayesDel_noAF

Benign

-0.65

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Benign

0.27

T;T;.

Eigen

Benign

0.092

Eigen_PC

Benign

0.16

FATHMM_MKL

Uncertain

0.94

LIST_S2

Benign

0.76

.;T;T

M_CAP

Benign

0.012

MetaRNN

Benign

0.31

T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.9

L;L;.

PrimateAI

Benign

0.40

PROVEAN

Uncertain

-3.8

.;D;D

REVEL

Benign

0.14

Sift

Uncertain

0.015

.;D;D

Sift4G

Uncertain

0.025

.;D;D

Polyphen

0.087

B;B;.

Vest4

0.13, 0.15

MutPred

0.64

Loss of sheet (P = 0.0817);Loss of sheet (P = 0.0817);.;

MVP

0.27

MPC

0.47

ClinPred

0.91

GERP RS

4.2

Varity_R

0.48

gMVP

0.67

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