Genetic Variant HLA-DRB5:p.Tyr112* (chr6-32521939-G-T) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_002125.4(HLA-DRB5):c.336C>A(p.Tyr112*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000712 in 1,405,466 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. Y112Y) has been classified as Likely benign. Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: not found (cov: 21)

Exomes 𝑓: 7.1e-7 ( 0 hom. )

Consequence

HLA-DRB5
NM_002125.4 stop_gained

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.0840

Publications

0 publications found

Variant links:

Genes affected

HLA-DRB5 (HGNC:4953): (major histocompatibility complex, class II, DR beta 5) HLA-DRB5 belongs to the HLA class II beta chain paralogues. This class II molecule is a heterodimer consisting of an alpha (DRA) and a beta (DRB) chain, 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. 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 DR molecule the beta chain contains all the polymorphisms specifying the peptide binding specificities. Typing for these polymorphisms is routinely done for bone marrow and kidney transplantation. There are multiple pseudogenes of this gene. [provided by RefSeq, Feb 2020]

HLA-DRB5 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
HLA-DRB5	NM_002125.4 link	c.336C>A	p.Tyr112*	stop_gained	Exon 2 of 6	ENST00000374975.4	NP_002116.2	Q30154A0A2Z4LKS3
HLA-DRB5	XM_011514562.3 link	c.336C>A	p.Tyr112*	stop_gained	Exon 2 of 6		XP_011512864.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
HLA-DRB5	ENST00000374975.4 link	c.336C>A	p.Tyr112*	stop_gained	Exon 2 of 6	6	NM_002125.4	ENSP00000364114.3		Q30154
HLA-DRB5	ENST00000714490.1 link	c.336C>A	p.Tyr112*	stop_gained	Exon 2 of 6			ENSP00000519744.1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000692

AC:

AN:

144570

AF XY:

0.00

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000499

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

7.12e-7

AC:

AN:

1405466

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

700866

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

32112

American (AMR)

AF:

0.0000232

AC:

AN:

43110

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

24042

East Asian (EAS)

AF:

0.00

AC:

AN:

38692

South Asian (SAS)

AF:

0.00

AC:

AN:

84528

European-Finnish (FIN)

AF:

0.00

AC:

AN:

51936

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5484

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1067794

Other (OTH)

AF:

0.00

AC:

AN:

57768

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.775

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ExAC

AF:

0.00000890

AC:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.26

BayesDel_noAF

Pathogenic

0.29

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

Eigen

Benign

-0.027

Eigen_PC

Benign

-0.35

FATHMM_MKL

Benign

0.14

PhyloP100

0.084

Vest4

0.64

GERP RS

1.9

Mutation Taster

=119/81

disease causing (fs/PTC)

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.050

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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6-32521939-G-T

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