NM_000569.8:c.114C>T

Variant names:

• chr1-161548626-G-A
• rs447536
• NM_000569.8:c.114C>T

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_000569.8(FCGR3A):​c.114C>T​(p.Leu38Leu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000253 in 1,460,886 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 0.000033 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000025 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: FCGR3A NM_000569.8 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.229
• Publications: 15 publications found

Genes affected

FCGR3A (HGNC:3619): (Fc gamma receptor IIIa) This gene encodes a receptor for the Fc portion of immunoglobulin G, and it is involved in the removal of antigen-antibody complexes from the circulation, as well as other responses, including antibody dependent cellular mediated cytotoxicity and antibody dependent enhancement of virus infections. This gene (FCGR3A) is highly similar to another nearby gene (FCGR3B) located on chromosome 1. The receptor encoded by this gene is expressed on natural killer (NK) cells as an integral membrane glycoprotein anchored through a transmembrane peptide, whereas FCGR3B is expressed on polymorphonuclear neutrophils (PMN) where the receptor is anchored through a phosphatidylinositol (PI) linkage. Mutations in this gene are associated with immunodeficiency 20, and have been linked to susceptibility to recurrent viral infections, susceptibility to systemic lupus erythematosus, and alloimmune neonatal neutropenia. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Aug 2020]

FCGR3A Gene-Disease associations (from GenCC):

• autosomal recessive primary immunodeficiency with defective spontaneous natural killer cell cytotoxicity

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ENSG00000289768 (HGNC:):

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (REVEL=0.014).
• BP7: Synonymous conserved (PhyloP=-0.229 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FCGR3A	NM_000569.8	c.114C>T	p.Leu38Leu	synonymous_variant	Exon 3 of 5	ENST00000443193.6	NP_000560.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FCGR3A	ENST00000443193.6	c.114C>T	p.Leu38Leu	synonymous_variant	Exon 3 of 5	1	NM_000569.8	ENSP00000392047.2
ENSG00000289768	ENST00000699402.1	c.111C>T	p.Leu37Leu	synonymous_variant	Exon 3 of 4			ENSP00000514363.1

Frequencies

GnomAD3 genomes AF: 0.0000331 AC: 5 AN: 150942 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000984

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: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000147

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000440 AC: 11 AN: 249862 AF XY: 0.0000444

Gnomad AFR exome AF: 0.000126

Gnomad AMR exome AF: 0.0000291

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000442

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000253 AC: 37 AN: 1460886 Hom.: 0 Cov.: 35 AF XY: 0.0000206 AC XY: 15 AN XY: 726694

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

African (AFR) AF: 0.0000600 AC: 2 AN: 33336

American (AMR) AF: 0.0000224 AC: 1 AN: 44666

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26120

East Asian (EAS) AF: 0.00 AC: 0 AN: 39690

South Asian (SAS) AF: 0.0000465 AC: 4 AN: 85950

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53402

Middle Eastern (MID) AF: 0.000174 AC: 1 AN: 5754

European-Non Finnish (NFE) AF: 0.0000252 AC: 28 AN: 1111648

Other (OTH) AF: 0.0000166 AC: 1 AN: 60320

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Data not reliable, filtered out with message: AS_VQSR AF: 0.0000331 AC: 5 AN: 151058 Hom.: 0 Cov.: 32 AF XY: 0.0000542 AC XY: 4 AN XY: 73854

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

African (AFR) AF: 0.0000981 AC: 4 AN: 40758

American (AMR) AF: 0.00 AC: 0 AN: 15206

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3454

East Asian (EAS) AF: 0.00 AC: 0 AN: 5178

South Asian (SAS) AF: 0.00 AC: 0 AN: 4778

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10580

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 292

European-Non Finnish (NFE) AF: 0.0000147 AC: 1 AN: 67814

Other (OTH) AF: 0.00 AC: 0 AN: 2086

⚠️ 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.

Alfa AF: 0.00149 Hom.: 0

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.85
CADD	Benign	3.0
DANN	Benign	0.49
PhyloP100		-0.23
Mutation Taster		=100/0	polymorphism

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

Other links and lift over

dbSNP: rs447536; hg19: chr1-161518416; COSMIC: COSV63458796;