3-46021880-T-A

Position:

• chr3-46021880-T-A

Variant summary

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

The NM_001024644.2(XCR1):​c.68A>T​(p.Glu23Val) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: XCR1 NM_001024644.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.42

Genes affected

XCR1 (HGNC:1625): (X-C motif chemokine receptor 1) The protein encoded by this gene is a chemokine receptor belonging to the G protein-coupled receptor superfamily. The family members are characterized by the presence of 7 transmembrane domains. The encoded protein transduces a signal by increasing the intracellular calcium ion level. The viral macrophage inflammatory protein-II is an antagonist of this receptor and blocks signaling. Some studies have implicated a cluster of genes at 3p21.31, including this gene, as associated with COVID-19 risk. The encoded protein may also play a role in cell proliferation and migration in several types of cancer. [provided by RefSeq, Jan 2023]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
XCR1	NM_001024644.2	c.68A>T	p.Glu23Val	missense_variant	2/2	ENST00000309285.4	NP_001019815.1
XCR1	NM_001381860.1	c.68A>T	p.Glu23Val	missense_variant	4/4		NP_001368789.1
XCR1	NM_005283.3	c.68A>T	p.Glu23Val	missense_variant	3/3		NP_005274.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
XCR1	ENST00000309285.4	c.68A>T	p.Glu23Val	missense_variant	2/2	1	NM_001024644.2	ENSP00000310405	P1
XCR1	ENST00000395946.3	c.68A>T	p.Glu23Val	missense_variant	3/3	1		ENSP00000379277	P1
XCR1	ENST00000683768.1	c.68A>T	p.Glu23Val	missense_variant	6/6			ENSP00000507745	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jun 22, 2023

The c.68A>T (p.E23V) alteration is located in exon 3 (coding exon 1) of the XCR1 gene. This alteration results from a A to T substitution at nucleotide position 68, causing the glutamic acid (E) at amino acid position 23 to be replaced by a valine (V). 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
AlphaMissense	Benign	0.19
BayesDel_addAF	Uncertain	0.027	T
BayesDel_noAF	Benign	-0.20
CADD	Benign	23
DANN	Uncertain	0.99
DEOGEN2	Benign	0.31	T;T
Eigen	Benign	0.079
Eigen_PC	Benign	0.11
FATHMM_MKL	Uncertain	0.97	D
LIST_S2	Benign	0.42	T;T
M_CAP	Benign	0.071	D
MetaRNN	Uncertain	0.46	T;T
MetaSVM	Benign	-0.70	T
MutationAssessor	Uncertain	2.0	M;.
MutationTaster	Benign	0.99	D;D
PrimateAI	Benign	0.39	T
PROVEAN	Uncertain	-3.3	D;D
REVEL	Uncertain	0.36
Sift	Benign	0.036	D;.
Sift4G	Benign	0.075	T;.
Polyphen		0.94	P;.
Vest4		0.29
MutPred		0.50		Loss of helix (P = 0.1299);Loss of helix (P = 0.1299);
MVP		0.83
MPC		1.1
ClinPred		0.95	D
GERP RS		5.0
Varity_R		0.24
gMVP		0.38

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr3-46063372;