Variant 2-86846759-G-C details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_004931.5(CD8B):c.508C>G(p.Pro170Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000266 in 1,579,576 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000072 ( 0 hom., cov: 30)

Exomes 𝑓: 0.000022 ( 0 hom. )

Consequence

CD8B
NM_004931.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.295

Variant links:

Genes affected

CD8B (HGNC:1707): (CD8 subunit beta) The CD8 antigen is a cell surface glycoprotein found on most cytotoxic T lymphocytes that mediates efficient cell-cell interactions within the immune system. The CD8 antigen, acting as a coreceptor, and the T-cell receptor on the T lymphocyte recognize antigens displayed by an antigen presenting cell (APC) in the context of class I MHC molecules. The functional coreceptor is either a homodimer composed of two alpha chains, or a heterodimer composed of one alpha and one beta chain. Both alpha and beta chains share significant homology to immunoglobulin variable light chains. This gene encodes the CD8 beta chain isoforms. Multiple alternatively spliced transcript variants encoding distinct membrane associated or secreted isoforms have been described. A pseudogene, also located on chromosome 2, has been identified. [provided by RefSeq, May 2010]

CD8B links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.04210764).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CD8B	NM_004931.5 linkuse as main transcript	c.508C>G	p.Pro170Ala	missense_variant	4/6	ENST00000390655.12	NP_004922.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CD8B	ENST00000390655.12 linkuse as main transcript	c.508C>G	p.Pro170Ala	missense_variant	4/6	1	NM_004931.5	ENSP00000375070	P4	P10966-1

Frequencies

GnomAD3 genomes

AF:

0.0000724

AC:

AN:

151926

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000590

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:

0.0000147

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.0000853

AC:

AN:

199210

Hom.:

AF XY:

0.000103

AC XY:

AN XY:

106324

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000414

Gnomad ASJ exome

AF:

0.000110

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000398

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000233

Gnomad OTH exome

AF:

0.000194

GnomAD4 exome

AF:

0.0000217

AC:

AN:

1427650

Hom.:

Cov.:

AF XY:

0.0000241

AC XY:

AN XY:

706742

show subpopulations

Gnomad4 AFR exome

AF:

0.0000304

Gnomad4 AMR exome

AF:

0.000302

Gnomad4 ASJ exome

AF:

0.0000392

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000123

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000110

Gnomad4 OTH exome

AF:

0.0000338

GnomAD4 genome

AF:

0.0000724

AC:

AN:

151926

Hom.:

Cov.:

AF XY:

0.000108

AC XY:

AN XY:

74164

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000590

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.000478

Alfa

AF:

0.0000434

Hom.:

Bravo

AF:

0.0000945

ExAC

AF:

0.0000498

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Oct 26, 2021

The c.508C>G (p.P170A) alteration is located in exon 4 (coding exon 4) of the CD8B gene. This alteration results from a C to G substitution at nucleotide position 508, causing the proline (P) at amino acid position 170 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

0.094

BayesDel_addAF

Benign

-0.48

BayesDel_noAF

Benign

-0.59

CADD

Benign

9.8

DANN

Benign

0.87

DEOGEN2

Benign

0.23

.;.;T;T

Eigen

Benign

-0.45

Eigen_PC

Benign

-0.65

FATHMM_MKL

Benign

0.059

LIST_S2

Benign

0.76

T;T;T;T

M_CAP

Benign

0.0016

MetaRNN

Benign

0.042

T;T;T;T

MetaSVM

Benign

-0.98

MutationTaster

Benign

1.0

N;N;N;N;N;N

PrimateAI

Benign

0.26

PROVEAN

Benign

-1.4

N;N;N;.

REVEL

Benign

0.045

Sift

Benign

1.0

T;T;T;.

Sift4G

Benign

0.24

T;T;T;T

Polyphen

1.0

D;D;D;.

Vest4

0.24

MutPred

0.28

Loss of loop (P = 0.0374);Loss of loop (P = 0.0374);Loss of loop (P = 0.0374);Loss of loop (P = 0.0374);

MVP

0.49

MPC

0.69

ClinPred

0.049

GERP RS

1.5

Varity_R

0.041

gMVP

0.24

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