NM_002116.8:c.450G>C

Variant names:

• chr6-29943374-G-C
• NM_002116.8:c.450G>C
• HLA-A p.Leu150Leu

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BP4_Strong BP7

The NM_002116.8(HLA-A):​c.450G>C​(p.Leu150Leu) variant causes a synonymous 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. Synonymous variant affecting the same amino acid position (i.e. L150L) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 7)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: HLA-A NM_002116.8 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.05
• Publications: 0 publications found

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]

POLR1HASP (HGNC:):

ACMG classification

Our verdict: Likely_benign. The variant received -5 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.63).
• BP7: Synonymous conserved (PhyloP=-1.05 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_002116.8. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	HLA-A	NM_002116.8	MANE Select	c.450G>C	p.Leu150Leu	synonymous	Exon 3 of 8	NP_002107.3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	HLA-A	ENST00000376809.10	TSL:6 MANE Select	c.450G>C	p.Leu150Leu	synonymous	Exon 3 of 8	ENSP00000366005.5	P04439-1
	HLA-A	ENST00000952344.1		c.450G>C	p.Leu150Leu	synonymous	Exon 3 of 8	ENSP00000622403.1
	HLA-A	ENST00000706894.1		c.450G>C	p.Leu150Leu	synonymous	Exon 4 of 8	ENSP00000516610.1	A0A9L9PYF9

Frequencies

GnomAD3 genomes Cov.: 7

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1014250 Hom.: 0 Cov.: 20 AF XY: 0.00 AC XY: 0 AN XY: 507184

African (AFR) AF: 0.00 AC: 0 AN: 23460

American (AMR) AF: 0.00 AC: 0 AN: 26402

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 16408

East Asian (EAS) AF: 0.00 AC: 0 AN: 19266

South Asian (SAS) AF: 0.00 AC: 0 AN: 68730

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 33804

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 3210

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 781796

Other (OTH) AF: 0.00 AC: 0 AN: 41174

GnomAD4 genome Cov.: 7

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.63
CADD	Benign	8.8
DANN	Benign	0.80
PhyloP100		-1.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

hg19: chr6-29911151;