dbSNP rs76475517: HLA-A:c.619+225G>A (chr6-29943768-G-A) – ACMG Classification: Likely_benign (-4 pts)

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BP4_Strong

The NM_002116.8(HLA-A):c.619+225G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.011 ( 14 hom., cov: 11)

Failed GnomAD Quality Control

Consequence

HLA-A
NM_002116.8 intron

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.250

Publications

4 publications found

Variant links:

Genes affected

HLA-A (HGNC:4931): (major histocompatibility complex, class I, A) HLA-A belongs to the HLA class I heavy chain paralogues. This class I molecule is a heterodimer consisting of a heavy chain and a light chain (beta-2 microglobulin). The heavy chain is anchored in the membrane. Class I molecules play a central role in the immune system by presenting peptides derived from the endoplasmic reticulum lumen so that they can be recognized by cytotoxic T cells. They are expressed in nearly all cells. The heavy chain is approximately 45 kDa and its gene contains 8 exons. Exon 1 encodes the leader peptide, exons 2 and 3 encode the alpha1 and alpha2 domains, which both bind the peptide, exon 4 encodes the alpha3 domain, exon 5 encodes the transmembrane region, and exons 6 and 7 encode the cytoplasmic tail. Polymorphisms within exon 2 and exon 3 are responsible for the peptide binding specificity of each class one molecule. Typing for these polymorphisms is routinely done for bone marrow and kidney transplantation. More than 6000 HLA-A alleles have been described. The HLA system plays an important role in the occurrence and outcome of infectious diseases, including those caused by the malaria parasite, the human immunodeficiency virus (HIV), and the severe acute respiratory syndrome coronavirus (SARS-CoV). The structural spike and the nucleocapsid proteins of the novel coronavirus SARS-CoV-2, which causes coronavirus disease 2019 (COVID-19), are reported to contain multiple Class I epitopes with predicted HLA restrictions. Individual HLA genetic variation may help explain different immune responses to a virus across a population.[provided by RefSeq, Aug 2020]

HLA-A links:

POLR1HASP (HGNC:):

POLR1HASP links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -4 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.86).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
HLA-A	NM_002116.8 link	c.619+225G>A		intron_variant	Intron 3 of 7	ENST00000376809.10	NP_002107.3	P04439-1B1PKY1B2R7U3
LOC124901298	XR_007059541.1 link	n.813+1013C>T		intron_variant	Intron 1 of 2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
HLA-A	ENST00000376809.10 link	c.619+225G>A		intron_variant	Intron 3 of 7	6	NM_002116.8	ENSP00000366005.5		P04439-1

Frequencies

GnomAD3 genomes

AF:

0.0104

AC:

779

AN:

74740

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00859

Gnomad AMI

AF:

0.00766

Gnomad AMR

AF:

0.0123

Gnomad ASJ

AF:

0.0106

Gnomad EAS

AF:

0.0238

Gnomad SAS

AF:

0.0179

Gnomad FIN

AF:

0.00883

Gnomad MID

AF:

0.00617

Gnomad NFE

AF:

0.00996

Gnomad OTH

AF:

0.0160

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome

Data not reliable, filtered out with message: AS_VQSR

AF:

0.0105

AC:

786

AN:

74766

Hom.:

Cov.:

AF XY:

0.0101

AC XY:

365

AN XY:

36154

show subpopulations

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00856

AC:

153

AN:

17874

American (AMR)

AF:

0.0123

AC:

AN:

5448

Ashkenazi Jewish (ASJ)

AF:

0.0106

AC:

AN:

1606

East Asian (EAS)

AF:

0.0239

AC:

AN:

2172

South Asian (SAS)

AF:

0.0179

AC:

AN:

2230

European-Finnish (FIN)

AF:

0.00883

AC:

AN:

5774

Middle Eastern (MID)

AF:

0.00676

AC:

AN:

148

European-Non Finnish (NFE)

AF:

0.00996

AC:

379

AN:

38042

Other (OTH)

AF:

0.0232

AC:

AN:

950

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.284

Heterozygous variant carriers

162

243

324

405

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

100

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.0995

Hom.:

169

Asia WGS

AF:

0.271

AC:

942

AN:

3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.86

CADD

Benign

(source)

DANN

Benign

0.89

PhyloP100

0.25

Mutation Taster

=100/0

polymorphism (auto)

(source)

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over