chr3-46373066-T-C

Variant names:

• chr3-46373066-T-C
• rs1799863
• NM_001394783.1:c.164T>C

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_001394783.1(CCR5):​c.164T>C​(p.Leu55Pro) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic 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. L55Q) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: CCR5 NM_001394783.1 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 6.26

Genes affected

CCR5 (HGNC:1606): (C-C motif chemokine receptor 5) This gene encodes a member of the beta chemokine receptor family, which is predicted to be a seven transmembrane protein similar to G protein-coupled receptors. This protein is expressed by T cells and macrophages, and is known to be an important co-receptor for macrophage-tropic virus, including HIV, to enter host cells. Defective alleles of this gene have been associated with the HIV infection resistance. The ligands of this receptor include monocyte chemoattractant protein 2 (MCP-2), macrophage inflammatory protein 1 alpha (MIP-1 alpha), macrophage inflammatory protein 1 beta (MIP-1 beta) and regulated on activation normal T expressed and secreted protein (RANTES). Expression of this gene was also detected in a promyeloblastic cell line, suggesting that this protein may play a role in granulocyte lineage proliferation and differentiation. This gene is located at the chemokine receptor gene cluster region. An allelic polymorphism in this gene results in both functional and non-functional alleles; the reference genome represents the functional allele. Two transcript variants encoding the same protein have been found for this gene. [provided by RefSeq, Jul 2015]

CCR5AS (HGNC:54398): (CCR5 antisense RNA)

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.888

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CCR5	NM_001394783.1	c.164T>C	p.Leu55Pro	missense_variant	Exon 2 of 2	ENST00000292303.5	NP_001381712.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CCR5	ENST00000292303.5	c.164T>C	p.Leu55Pro	missense_variant	Exon 2 of 2	1	NM_001394783.1	ENSP00000292303.4
CCR5	ENST00000445772.1	c.164T>C	p.Leu55Pro	missense_variant	Exon 1 of 1	6		ENSP00000404881.1
CCR5AS	ENST00000451485.2	n.392-1649A>G		intron_variant	Intron 2 of 3	3
CCR5AS	ENST00000701879.1	n.174-1649A>G		intron_variant	Intron 1 of 2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.95
BayesDel_addAF	Pathogenic	0.21	D
BayesDel_noAF	Uncertain	0.060
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.58	D;D
Eigen	Pathogenic	0.73
Eigen_PC	Uncertain	0.53
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Benign	0.71	.;T
M_CAP	Benign	0.050	D
MetaRNN	Pathogenic	0.89	D;D
MetaSVM	Uncertain	0.19	D
MutationAssessor	Pathogenic	4.2	H;H
PrimateAI	Uncertain	0.69	T
PROVEAN	Pathogenic	-6.4	D;D
REVEL	Uncertain	0.56
Sift	Pathogenic	0.0	D;D
Sift4G	Pathogenic	0.0	D;D
Polyphen		1.0	D;D
Vest4		0.82
MutPred		0.66		Loss of stability (P = 0.04);Loss of stability (P = 0.04);
MVP		0.92
ClinPred		1.0	D
GERP RS		5.4
Varity_R		0.98
gMVP		0.92

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: rs1799863; hg19: chr3-46414557;