19-54636735-G-A

Variant names:

• chr19-54636735-G-A
• NM_001081637.3:c.1816G>A

Variant summary

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

The NM_001081637.3(LILRB1):​c.1816G>A​(p.Ala606Thr) 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. 12/18 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 27)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: LILRB1 NM_001081637.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.0110

Genes affected

LILRB1 (HGNC:6605): (leukocyte immunoglobulin like receptor B1) This gene is a member of the leukocyte immunoglobulin-like receptor (LIR) family, which is found in a gene cluster at chromosomal region 19q13.4. The encoded protein belongs to the subfamily B class of LIR receptors which contain two or four extracellular immunoglobulin domains, a transmembrane domain, and two to four cytoplasmic immunoreceptor tyrosine-based inhibitory motifs (ITIMs). The receptor is expressed on immune cells where it binds to MHC class I molecules on antigen-presenting cells and transduces a negative signal that inhibits stimulation of an immune response. It is thought to control inflammatory responses and cytotoxicity to help focus the immune response and limit autoreactivity. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

LILRB1-AS1 (HGNC:53114): (LILRB1 antisense RNA 1)

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=0.12405509).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
LILRB1	NM_001081637.3	c.1816G>A	p.Ala606Thr	missense_variant	Exon 15 of 15	ENST00000324602.12	NP_001075106.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
LILRB1	ENST00000324602.12	c.1816G>A	p.Ala606Thr	missense_variant	Exon 15 of 15	5	NM_001081637.3	ENSP00000315997.7

Frequencies

GnomAD3 genomes Cov.: 27

GnomAD4 exome Data not reliable, filtered out with message: AS_VQSR AF: 6.85e-7 AC: 1 AN: 1459526 Hom.: 0 Cov.: 45 AF XY: 0.00000138 AC XY: 1 AN XY: 725794

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000116

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 27

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

May 09, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1816G>A (p.A606T) alteration is located in exon 15 (coding exon 14) of the LILRB1 gene. This alteration results from a G to A substitution at nucleotide position 1816, causing the alanine (A) at amino acid position 606 to be replaced by a threonine (T). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Benign	-0.26	T
BayesDel_noAF	Benign	-0.60
CADD	Benign	19
DANN	Uncertain	0.99
DEOGEN2	Benign	0.036	T;T;.;.;T;.;.
Eigen	Benign	-0.57
Eigen_PC	Benign	-0.85
FATHMM_MKL	Benign	0.0064	N
LIST_S2	Benign	0.74	T;T;T;T;T;T;.
M_CAP	Benign	0.00083	T
MetaRNN	Benign	0.12	T;T;T;T;T;T;T
MetaSVM	Benign	-0.88	T
PrimateAI	Benign	0.32	T
PROVEAN	Benign	-1.8	N;N;N;N;N;N;N
REVEL	Benign	0.025
Sift	Benign	0.058	T;T;T;T;T;T;T
Sift4G	Benign	0.14	T;T;T;T;T;T;T
Polyphen		0.78	.;.;.;.;.;P;.
Vest4		0.10
MutPred		0.23		Loss of loop (P = 0.0128);.;.;.;.;.;.;
MVP		0.19
MPC		0.21
ClinPred		0.35	T
GERP RS		-0.66
gMVP		0.042

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr19-55148186;