Genetic Variant NM_002121.6:c.364+225C>A (chr6-33081160-C-A) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_002121.6(HLA-DPB1):c.364+225C>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000659 in 151,792 control chromosomes in the GnomAD database, with no homozygous occurrence. 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 0.0000066 ( 0 hom., cov: 31)

Exomes 𝑓: 0.0 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

HLA-DPB1
NM_002121.6 intron

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -2.05

Publications

6 publications found

Variant links:

Genes affected

HLA-DPB1 (HGNC:4940): (major histocompatibility complex, class II, DP beta 1) HLA-DPB belongs to the HLA class II beta chain paralogues. This class II molecule is a heterodimer consisting of an alpha (DPA) and a beta chain (DPB), both anchored in the membrane. It plays a central role in the immune system by presenting peptides derived from extracellular proteins. Class II molecules are expressed in antigen presenting cells (APC: B lymphocytes, dendritic cells, macrophages). The beta chain is approximately 26-28 kDa and its gene contains 6 exons. Exon one encodes the leader peptide, exons 2 and 3 encode the two extracellular domains, exon 4 encodes the transmembrane domain and exon 5 encodes the cytoplasmic tail. Within the DP molecule both the alpha chain and the beta chain contain the polymorphisms specifying the peptide binding specificities, resulting in up to 4 different molecules. [provided by RefSeq, Jul 2008]

HLA-DPB1 links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.88).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
HLA-DPB1	NM_002121.6 link	c.364+225C>A		intron_variant	Intron 2 of 5	ENST00000418931.7	NP_002112.3	P04440I4EC15

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
HLA-DPB1	ENST00000418931.7 link	c.364+225C>A		intron_variant	Intron 2 of 5	6	NM_002121.6	ENSP00000408146.2		P04440

Frequencies

GnomAD3 genomes

AF:

0.00000659

AC:

AN:

151792

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:

0.0000946

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

Data not reliable, filtered out with message: AC0

AF:

0.00

AC:

AN:

400308

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

208038

African (AFR)

AF:

0.00

AC:

AN:

11048

American (AMR)

AF:

0.00

AC:

AN:

14234

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

12234

East Asian (EAS)

AF:

0.00

AC:

AN:

28652

South Asian (SAS)

AF:

0.00

AC:

AN:

29518

European-Finnish (FIN)

AF:

0.00

AC:

AN:

27186

Middle Eastern (MID)

AF:

0.00

AC:

AN:

1828

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

251950

Other (OTH)

AF:

0.00

AC:

AN:

23658

GnomAD4 genome

AF:

0.00000659

AC:

AN:

151792

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74118

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41222

American (AMR)

AF:

0.00

AC:

AN:

15268

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5146

South Asian (SAS)

AF:

0.00

AC:

AN:

4820

European-Finnish (FIN)

AF:

0.0000946

AC:

AN:

10576

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67970

Other (OTH)

AF:

0.00

AC:

AN:

2090

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.88

CADD

Benign

1.5

(source)

DANN

Benign

0.58

PhyloP100

-2.0

PromoterAI

-0.019

Neutral

(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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over