3-46021137-T-C

Variant names:

• chr3-46021137-T-C
• rs551972565
• NM_001024644.2:c.811A>G

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001024644.2(XCR1):​c.811A>G​(p.Ile271Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000657 in 152,214 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 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. I271F) has been classified as Uncertain significance.

• Frequency: Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
• Consequence: XCR1 NM_001024644.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.596
• Publications: 0 publications found

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

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.13445333).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001024644.2. 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
	XCR1	NM_001024644.2	MANE Select	c.811A>G	p.Ile271Val	missense	Exon 2 of 2	NP_001019815.1	P46094
	XCR1	NM_001381860.1		c.811A>G	p.Ile271Val	missense	Exon 4 of 4	NP_001368789.1	P46094
	XCR1	NM_005283.3		c.811A>G	p.Ile271Val	missense	Exon 3 of 3	NP_005274.1	P46094

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	XCR1	ENST00000309285.4	TSL:1 MANE Select	c.811A>G	p.Ile271Val	missense	Exon 2 of 2	ENSP00000310405.3	P46094
	XCR1	ENST00000395946.3	TSL:1	c.811A>G	p.Ile271Val	missense	Exon 3 of 3	ENSP00000379277.3	P46094
	XCR1	ENST00000683768.1		c.811A>G	p.Ile271Val	missense	Exon 6 of 6	ENSP00000507745.1	P46094

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152214 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000655

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: 0.00

Gnomad OTH AF: 0.00

GnomAD4 exome Cov.: 30

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152214 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 74362

African (AFR) AF: 0.00 AC: 0 AN: 41462

American (AMR) AF: 0.0000655 AC: 1 AN: 15272

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5196

South Asian (SAS) AF: 0.00 AC: 0 AN: 4832

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10626

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68034

Other (OTH) AF: 0.00 AC: 0 AN: 2094

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.10
BayesDel_addAF	Benign	-0.28	T
BayesDel_noAF	Benign	-0.64
CADD	Benign	3.7
DANN	Benign	0.40
DEOGEN2	Benign	0.051	T
Eigen	Benign	-1.2
Eigen_PC	Benign	-1.2
FATHMM_MKL	Benign	0.22	N
LIST_S2	Benign	0.48	T
M_CAP	Benign	0.011	T
MetaRNN	Benign	0.13	T
MetaSVM	Benign	-0.97	T
MutationAssessor	Benign	0.92	L
PhyloP100		0.60
PrimateAI	Benign	0.40	T
PROVEAN	Benign	0.13	N
REVEL	Benign	0.031
Sift	Benign	0.46	T
Sift4G	Benign	0.45	T
Polyphen		0.031	B
Vest4		0.065
MutPred		0.43		Loss of loop (P = 0.2897)
MVP		0.14
MPC		0.32
ClinPred		0.22	T
GERP RS		0.51
Varity_R		0.022
gMVP		0.26
Mutation Taster		=94/6	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: rs551972565; hg19: chr3-46062629;