NM_000054.7:c.602_603delGCinsAT

Variant names:

• chrX-153906108-GC-AT
• NM_000054.7:c.602_603delGCinsAT
• AVPR2 p.Gly201Asp

Variant summary

Our verdict is Likely pathogenic. The variant received 8 ACMG points: 8P and 0B. PS1 PM1 PM5

The NM_000054.7(AVPR2):​c.602_603delGCinsAT​(p.Gly201Asp) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. It is difficult to determine the true allele frequency of this variant because it is of type MNV, and the frequency of such variant types in population databases may be underestimated and unreliable. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another nucleotide change resulting in the same amino acid substitution has been previously reported as Pathogenic in ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G201C) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 25)
• Consequence: AVPR2 NM_000054.7 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 5.77
• Publications: 0 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), Ambry Genetics, Orphanet
• nephrogenic diabetes insipidus

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ENSG00000284987 (HGNC:):

ACMG classification

Our verdict: Likely_pathogenic. The variant received 8 ACMG points.

• PS1: Transcript NM_000054.7 (AVPR2) is affected with MISSENSE_VARIANT having same AA change as one Pathogenic present in ClinVar.
• PM1: In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 2 uncertain in NM_000054.7
• PM5: Other missense variant is known to change same aminoacid residue: Variant chrX-153906107-G-T is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 3767886.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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	AVPR2	NM_000054.7	MANE Select	c.602_603delGCinsAT	p.Gly201Asp	missense	N/A	NP_000045.1	P30518-1
	AVPR2	NM_001146151.3		c.602_603delGCinsAT	p.Gly201Asp	missense	N/A	NP_001139623.1	P30518-2
	AVPR2	NR_027419.2		n.555_556delGCinsAT		non_coding_transcript_exon	Exon 3 of 4

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	AVPR2	ENST00000646375.2	MANE Select	c.602_603delGCinsAT	p.Gly201Asp	missense	N/A	ENSP00000496396.1	P30518-1
	AVPR2	ENST00000337474.5	TSL:1	c.602_603delGCinsAT	p.Gly201Asp	missense	N/A	ENSP00000338072.5	P30518-1
	AVPR2	ENST00000370049.1	TSL:1	c.602_603delGCinsAT	p.Gly201Asp	missense	N/A	ENSP00000359066.1	P30518-2

Frequencies

GnomAD3 genomes Cov.: 25

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

GnomAD4 genome Cov.: 25

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		5.8

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

hg19: chrX-153171562;