chr6-32745222-C-T

Variant names:

• chr6-32745222-C-T
• rs75289558
• NM_020056.5:c.146C>T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_020056.5(HLA-DQA2):​c.146C>T​(p.Thr49Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: HLA-DQA2 NM_020056.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.880

Genes affected

HLA-DQA2 (HGNC:4943): (major histocompatibility complex, class II, DQ alpha 2) This gene belongs to the HLA class II alpha chain family. The encoded protein forms a heterodimer with a class II beta chain. It is located in intracellular vesicles and plays a central role in the peptide loading of MHC class II molecules by helping to release the CLIP molecule from the peptide binding site. Class II molecules are expressed in antigen presenting cells (B lymphocytes, dendritic cells, macrophages) and are used to present antigenic peptides on the cell surface to be recognized by CD4 T-cells. [provided by RefSeq, Jun 2010]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.16691089).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
HLA-DQA2	NM_020056.5	c.146C>T	p.Thr49Ile	missense_variant	Exon 2 of 5	ENST00000374940.4	NP_064440.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
HLA-DQA2	ENST00000374940.4	c.146C>T	p.Thr49Ile	missense_variant	Exon 2 of 5	6	NM_020056.5	ENSP00000364076.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.18
BayesDel_addAF	Benign	-0.12	T
BayesDel_noAF	Benign	-0.41
CADD	Benign	15
DANN	Uncertain	0.98
DEOGEN2	Benign	0.0032	T
Eigen	Benign	-0.46
Eigen_PC	Benign	-0.55
FATHMM_MKL	Benign	0.034	N
M_CAP	Benign	0.016	T
MetaRNN	Benign	0.17	T
MetaSVM	Benign	-0.97	T
MutationAssessor	Uncertain	2.8	M
PrimateAI	Uncertain	0.58	T
PROVEAN	Benign	-1.4	N
REVEL	Benign	0.17
Sift	Benign	0.055	T
Sift4G	Benign	0.090	T
Polyphen		0.12	B
Vest4		0.45
MutPred		0.47		Loss of phosphorylation at T49 (P = 0.0213);
MVP		0.33
MPC		1.3
ClinPred		0.97	D
GERP RS		3.2
Varity_R		0.12
gMVP		0.14

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

Other links and lift over

dbSNP: rs75289558; hg19: chr6-32712999;