chrX-153906343-C-CT

Variant names:

• chrX-153906343-C-CT
• rs193922121
• NM_000054.7:c.838dupT

Variant summary

Our verdict is Pathogenic. The variant received 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_000054.7(AVPR2):​c.838dupT​(p.Tyr280LeufsTer77) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (★). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 25)
• Consequence: AVPR2 NM_000054.7 frameshift
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 2.80
• Publications: 3 publications found

Genes affected

AVPR2 (HGNC:897): (arginine vasopressin receptor 2) This gene encodes the vasopressin receptor, type 2, also known as the V2 receptor, which belongs to the seven-transmembrane-domain G protein-coupled receptor (GPCR) superfamily, and couples to Gs thus stimulating adenylate cyclase. The subfamily that includes the V2 receptor, the V1a and V1b vasopressin receptors, the oxytocin receptor, and isotocin and mesotocin receptors in non-mammals, is well conserved, though several members signal via other G proteins. All bind similar cyclic nonapeptide hormones. The V2 receptor is expressed in the kidney tubule, predominantly in the distal convoluted tubule and collecting ducts, where its primary property is to respond to the pituitary hormone arginine vasopressin (AVP) by stimulating mechanisms that concentrate the urine and maintain water homeostasis in the organism. When the function of this gene is lost, the disease Nephrogenic Diabetes Insipidus (NDI) results. The V2 receptor is also expressed outside the kidney although its tissue localization is uncertain. When these 'extrarenal receptors' are stimulated by infusion of a V2 selective agonist (dDAVP), a variety of clotting factors are released into the bloodstream. The physiologic importance of this property is not known - its absence does not appear to be detrimental in NDI patients. The gene expression has also been described in fetal lung tissue and lung cancer associated with alternative splicing. [provided by RefSeq, Jul 2008]

AVPR2 Gene-Disease associations (from GenCC):

• diabetes insipidus, nephrogenic, X-linked

  Inheritance: XL Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics
• nephrogenic syndrome of inappropriate antidiuresis

  Inheritance: XL Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet, Ambry Genetics
• nephrogenic diabetes insipidus

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ENSG00000284987 (HGNC:):

ACMG classification

Our verdict: Pathogenic. The variant received 12 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant X-153906343-C-CT is Pathogenic according to our data. Variant chrX-153906343-C-CT is described in ClinVar as Pathogenic. ClinVar VariationId is 35747.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000054.7. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	AVPR2	NM_000054.7	MANE Select	c.838dupT	p.Tyr280LeufsTer77	frameshift	Exon 3 of 4	NP_000045.1
	AVPR2	NM_001146151.3		c.838dupT	p.Tyr280LeufsTer28	frameshift	Exon 3 of 3	NP_001139623.1
	AVPR2	NR_027419.2		n.791dupT		non_coding_transcript_exon	Exon 3 of 4

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	AVPR2	ENST00000646375.2	MANE Select	c.838dupT	p.Tyr280LeufsTer77	frameshift	Exon 3 of 4	ENSP00000496396.1
	AVPR2	ENST00000337474.5	TSL:1	c.838dupT	p.Tyr280LeufsTer77	frameshift	Exon 2 of 3	ENSP00000338072.5
	AVPR2	ENST00000370049.1	TSL:1	c.838dupT	p.Tyr280LeufsTer28	frameshift	Exon 2 of 2	ENSP00000359066.1

Frequencies

GnomAD3 genomes Cov.: 25

GnomAD4 exome Cov.: 36

GnomAD4 genome Cov.: 25

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Nephrogenic diabetes insipidus Pathogenic:1

Aug 18, 2011

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing;curation

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		2.8
Mutation Taster		=1/199	disease causing (ClinVar)

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: rs193922121; hg19: chrX-153171797;