chr2-136114910-CAG-C

Variant names:

• chr2-136114910-CAG-C
• rs730880320
• NM_003467.3:c.1016_1017delCT

Variant summary

Our verdict is Pathogenic. The variant received 18 ACMG points: 18P and 0B. PVS1_Strong PS3 PM2 PP5_Very_Strong

The NM_003467.3(CXCR4):​c.1016_1017delCT​(p.Ser339CysfsTer4) variant causes a frameshift change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Likely pathogenic (★★). ClinVar reports functional evidence for this variant: "SCV001237270: Experimental studies have shown that this premature translational stop signal affects CXCR4 function (PMID:16899028).".

• Frequency: Genomes: not found (cov: 32)
• Consequence: CXCR4 NM_003467.3 frameshift
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:3
• Conservation: PhyloP100: 9.60
• Publications: 13 publications found

Genes affected

CXCR4 (HGNC:2561): (C-X-C motif chemokine receptor 4) This gene encodes a CXC chemokine receptor specific for stromal cell-derived factor-1. The protein has 7 transmembrane regions and is located on the cell surface. It acts with the CD4 protein to support HIV entry into cells and is also highly expressed in breast cancer cells. Mutations in this gene have been associated with WHIM (warts, hypogammaglobulinemia, infections, and myelokathexis) syndrome. Alternate transcriptional splice variants, encoding different isoforms, have been characterized. [provided by RefSeq, Jul 2008]

CXCR4 Gene-Disease associations (from GenCC):

• WHIM syndrome

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• WHIM syndrome 1

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P
• WHIM syndrome

  Inheritance: AD Classification: MODERATE, SUPPORTIVE Submitted by: Orphanet, Ambry Genetics

ACMG classification

Our verdict: Pathogenic. The variant received 18 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most exon, not predicted to undergo nonsense mediated mRNA decay. There are 13 pathogenic variants in the truncated region.
• PS3: PS3 evidence extracted from ClinVar submissions: SCV001237270: Experimental studies have shown that this premature translational stop signal affects CXCR4 function (PMID: 16899028).
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 2-136114910-CAG-C is Pathogenic according to our data. Variant chr2-136114910-CAG-C is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 14021.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_003467.3. 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
	CXCR4	NM_003467.3	MANE Select	c.1016_1017delCT	p.Ser339CysfsTer4	frameshift	Exon 2 of 2	NP_003458.1	P61073-1
	CXCR4	NM_001348056.2		c.1229_1230delCT	p.Ser410CysfsTer4	frameshift	Exon 3 of 3	NP_001334985.1	A0A0U3GXA9
	CXCR4	NM_001348059.2		c.1115_1116delCT	p.Ser372CysfsTer4	frameshift	Exon 3 of 3	NP_001334988.1	A0A0U3FJG0

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CXCR4	ENST00000241393.4	TSL:1 MANE Select	c.1016_1017delCT	p.Ser339CysfsTer4	frameshift	Exon 2 of 2	ENSP00000241393.3	P61073-1
	CXCR4	ENST00000466288.1	TSL:1	c.971_972delCT	p.Ser324CysfsTer4	frameshift	Exon 2 of 2	ENSP00000512430.1	A0A8Q3WLL1
	CXCR4	ENST00000409817.1	TSL:6	c.1028_1029delCT	p.Ser343CysfsTer4	frameshift	Exon 1 of 1	ENSP00000386884.1	P61073-2

Frequencies

GnomAD3 genomes Cov.: 32

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Pathogenic/Likely pathogenic

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
1	-	-	not provided (1)
1	-	-	Warts, hypogammaglobulinemia, infections, and myelokathexis (1)
1	-	-	WHIM syndrome 1 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		9.6
Mutation Taster		=5/195	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs730880320; hg19: chr2-136872480;