19-41879038-T-A

Variant summary

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

The NM_001783.4(CD79A):c.128T>A(p.Met43Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000744 in 1,613,344 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/23 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: 31)

Exomes 𝑓: 0.0000068 ( 0 hom. )

Consequence

CD79A
NM_001783.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.736

Variant links:

Genes affected

CD79A (HGNC:1698): (CD79a molecule) The B lymphocyte antigen receptor is a multimeric complex that includes the antigen-specific component, surface immunoglobulin (Ig). Surface Ig non-covalently associates with two other proteins, Ig-alpha and Ig-beta, which are necessary for expression and function of the B-cell antigen receptor. This gene encodes the Ig-alpha protein of the B-cell antigen component. Alternatively spliced transcript variants encoding different isoforms have been described. [provided by RefSeq, Jul 2008]

CD79A links:

Genome browser will be placed here

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/exons	MANE	UniProt
CD79A	NM_001783.4 linkuse as main transcript	c.128T>A	p.Met43Lys	missense_variant	2/5	ENST00000221972.8
CD79A	NM_021601.4 linkuse as main transcript	c.128T>A	p.Met43Lys	missense_variant	2/5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CD79A	ENST00000221972.8 linkuse as main transcript	c.128T>A	p.Met43Lys	missense_variant	2/5	1	NM_001783.4	P1	P11912-1
CD79A	ENST00000444740.2 linkuse as main transcript	c.128T>A	p.Met43Lys	missense_variant	2/5	1			P11912-2
CD79A	ENST00000597454.2 linkuse as main transcript	c.128T>A	p.Met43Lys	missense_variant	2/4	3

Frequencies

GnomAD3 genomes

AF:

0.0000132

AC:

AN:

151846

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:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000797

AC:

AN:

250804

Hom.:

AF XY:

0.00000737

AC XY:

AN XY:

135702

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:

0.0000176

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000684

AC:

AN:

1461498

Hom.:

Cov.:

AF XY:

0.00000550

AC XY:

AN XY:

727042

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:

0.00000899

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000132

AC:

AN:

151846

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74166

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000452

Hom.:

Bravo

AF:

0.0000113

ExAC

AF:

0.00000824

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Agammaglobulinemia 3, autosomal recessive

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Jul 16, 2020

This sequence change replaces methionine with lysine at codon 43 of the CD79A protein (p.Met43Lys). The methionine residue is weakly conserved and there is a moderate physicochemical difference between methionine and lysine. This variant is present in population databases (rs782421590, ExAC 0.002%). This variant has not been reported in the literature in individuals with CD79A-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated, but these predictions have not been confirmed by published functional studies and their clinical significance is uncertain. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.20

BayesDel_addAF

Benign

-0.15

BayesDel_noAF

Benign

-0.44

Cadd

Benign

Dann

Benign

0.83

DEOGEN2

Benign

0.27

T;T;.

Eigen

Benign

-1.0

Eigen_PC

Benign

-1.0

FATHMM_MKL

Benign

0.12

LIST_S2

Benign

0.48

T;T;T

M_CAP

Benign

0.022

MetaRNN

Benign

0.091

T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.0

L;.;L

MutationTaster

Benign

1.0

N;N

PrimateAI

Benign

0.32

PROVEAN

Benign

-0.10

N;.;N

REVEL

Benign

0.015

Sift

Benign

0.13

T;.;D

Sift4G

Benign

0.36

T;D;D

Polyphen

0.30

B;.;.

Vest4

0.45

MutPred

0.41

Gain of solvent accessibility (P = 0.012);Gain of solvent accessibility (P = 0.012);Gain of solvent accessibility (P = 0.012);

MVP

0.19

MPC

0.78

ClinPred

0.069

GERP RS

1.8

Varity_R

0.11

gMVP

0.60

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.41

Details are displayed if max score is > 0.2

DS_DG_spliceai

0.41

Position offset: 1

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