chr3-46373617-A-G

Position:

• chr3-46373617-A-G

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_001394783.1(CCR5):​c.715A>G​(p.Thr239Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,818 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: CCR5 NM_001394783.1 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.357

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 Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.020517379).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CCR5	NM_001394783.1	c.715A>G	p.Thr239Ala	missense_variant	2/2	ENST00000292303.5	NP_001381712.1
CCR5AS	NR_125406.1	n.392-2200T>C		intron_variant, non_coding_transcript_variant
CCR5	NM_000579.4	c.715A>G	p.Thr239Ala	missense_variant	3/3		NP_000570.1
CCR5	NM_001100168.2	c.715A>G	p.Thr239Ala	missense_variant	3/3		NP_001093638.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CCR5	ENST00000292303.5	c.715A>G	p.Thr239Ala	missense_variant	2/2	1	NM_001394783.1	ENSP00000292303	P1
CCR5AS	ENST00000701879.1	n.174-2200T>C		intron_variant, non_coding_transcript_variant
CCR5	ENST00000445772.1	c.715A>G	p.Thr239Ala	missense_variant	1/1			ENSP00000404881	P1
CCR5AS	ENST00000451485.2	n.392-2200T>C		intron_variant, non_coding_transcript_variant		3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461818 Hom.: 0 Cov.: 32 AF XY: 0.00000138 AC XY: 1 AN XY: 727218

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000252

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

CCR5-related disorder Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Nov 04, 2022

The CCR5 c.715A>G variant is predicted to result in the amino acid substitution p.Thr239Ala. To our knowledge, this variant has not been reported in the literature or in a large population database (http://gnomad.broadinstitute.org), indicating this variant is rare. At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.080
BayesDel_addAF	Benign	-0.35	T
BayesDel_noAF	Benign	-0.74
CADD	Benign	7.5
DANN	Benign	0.59
DEOGEN2	Benign	0.050	T;T
Eigen	Benign	-1.2
Eigen_PC	Benign	-1.0
FATHMM_MKL	Benign	0.057	N
LIST_S2	Benign	0.46	.;T
M_CAP	Benign	0.0020	T
MetaRNN	Benign	0.021	T;T
MetaSVM	Benign	-0.98	T
MutationAssessor	Benign	-0.98	N;N
MutationTaster	Benign	1.0	N;N;N
PrimateAI	Benign	0.24	T
PROVEAN	Benign	0.41	N;N
REVEL	Benign	0.027
Sift	Benign	0.49	T;T
Sift4G	Benign	0.35	T;T
Polyphen		0.0	B;B
Vest4		0.11
MutPred		0.49		Loss of MoRF binding (P = 0.1024);Loss of MoRF binding (P = 0.1024);
MVP		0.17
ClinPred		0.035	T
GERP RS		0.54
Varity_R		0.14
gMVP		0.22

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: rs1575279854; hg19: chr3-46415108;