rs2756923

Positions:

• chr19-54783763-A-C
• chr19-54783763-A-G

Variant summary

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

The NM_014218.3(KIR2DL1):​c.997A>C​(p.Thr333Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000274 in 1,461,774 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/19 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T333A) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000027 (0 hom.)
• Consequence: KIR2DL1 NM_014218.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.983

Genes affected

KIR2DL1 (HGNC:6329): (killer cell immunoglobulin like receptor, two Ig domains and long cytoplasmic tail 1) Killer cell immunoglobulin-like receptors (KIRs) are transmembrane glycoproteins expressed by natural killer cells and subsets of T cells. The KIR genes are polymorphic and highly homologous and they are found in a cluster on chromosome 19q13.4 within the 1 Mb leukocyte receptor complex (LRC). The gene content of the KIR gene cluster varies among haplotypes, although several "framework" genes are found in all haplotypes (KIR3DL3, KIR3DP1, KIR3DL4, KIR3DL2). The KIR proteins are classified by the number of extracellular immunoglobulin domains (2D or 3D) and by whether they have a long (L) or short (S) cytoplasmic domain. KIR proteins with the long cytoplasmic domain transduce inhibitory signals upon ligand binding via an immune tyrosine-based inhibitory motif (ITIM), while KIR proteins with the short cytoplasmic domain lack the ITIM motif and instead associate with the TYRO protein tyrosine kinase binding protein to transduce activating signals. The ligands for several KIR proteins are subsets of HLA class I molecules; thus, KIR proteins are thought to play an important role in regulation of the immune response. [provided by RefSeq, Jul 2008]

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=0.116919905).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
KIR2DL1	NM_014218.3	c.997A>C	p.Thr333Pro	missense_variant	8/8	ENST00000336077.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
KIR2DL1	ENST00000336077.11	c.997A>C	p.Thr333Pro	missense_variant	8/8	1	NM_014218.3	P1
KIR2DL1	ENST00000291633.7	c.1075A>C	p.Thr359Pro	missense_variant	9/9	1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000274 AC: 4 AN: 1461774 Hom.: 0 Cov.: 71 AF XY: 0.00000275 AC XY: 2 AN XY: 727182

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: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000360

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.096
BayesDel_addAF	Benign	-0.19	T
BayesDel_noAF	Benign	-0.51
CADD	Benign	14
DANN	Benign	0.83
DEOGEN2	Benign	0.031	T;.
Eigen	Benign	-0.75
Eigen_PC	Benign	-1.0
FATHMM_MKL	Benign	0.0061	N
M_CAP	Benign	0.00042	T
MetaRNN	Benign	0.12	T;T
MetaSVM	Benign	-0.95	T
MutationTaster	Benign	1.0	N;N;N;N;N;N;N
PrimateAI	Benign	0.39	T
PROVEAN	Benign	-1.6	N;N
REVEL	Benign	0.072
Sift	Pathogenic	0.0	D;D
Sift4G	Benign	0.094	T;T
Polyphen		0.90	P;.
Vest4		0.13
MutPred		0.27		.;Gain of disorder (P = 0.0512);
MVP		0.36
MPC		2.6
ClinPred		0.22	T
GERP RS		-1.8
gMVP		0.041

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: rs2756923; hg19: chr19-55295215;