20-3084655-G-A

Position:

• chr20-3084655-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PM1 PM2 PP5

The NM_000490.5(AVP):​c.20C>T​(p.Pro7Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars).

• Frequency: Genomes: not found (cov: 33)
• Consequence: AVP NM_000490.5 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 3.47

Genes affected

AVP (HGNC:894): (arginine vasopressin) This gene encodes a member of the vasopressin/oxytocin family and preproprotein that is proteolytically processed to generate multiple protein products. These products include the neuropeptide hormone arginine vasopressin, and two other peptides, neurophysin 2 and copeptin. Arginine vasopressin is a posterior pituitary hormone that is synthesized in the supraoptic nucleus and paraventricular nucleus of the hypothalamus. Along with its carrier protein, neurophysin 2, it is packaged into neurosecretory vesicles and transported axonally to the nerve endings in the neurohypophysis where it is either stored or secreted into the bloodstream. The precursor is thought to be activated while it is being transported along the axon to the posterior pituitary. Arginine vasopressin acts as a growth factor by enhancing pH regulation through acid-base transport systems. It has a direct antidiuretic action on the kidney, and also causes vasoconstriction of the peripheral vessels. This hormone can contract smooth muscle during parturition and lactation. It is also involved in cognition, tolerance, adaptation and complex sexual and maternal behaviour, as well as in the regulation of water excretion and cardiovascular functions. Mutations in this gene cause autosomal dominant neurohypophyseal diabetes insipidus (ADNDI). This gene is present in a gene cluster with the related gene oxytocin on chromosome 20. [provided by RefSeq, Nov 2015]

ACMG classification

Verdict is Uncertain_significance. Variant got 5 ACMG points.

• PM1: In a signal_peptide (size 18) in uniprot entity NEU2_HUMAN there are 5 pathogenic changes around while only 0 benign (100%) in NM_000490.5
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 20-3084655-G-A is Pathogenic according to our data. Variant chr20-3084655-G-A is described in ClinVar as [Pathogenic]. Clinvar id is 12219.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
AVP	NM_000490.5	c.20C>T	p.Pro7Leu	missense_variant	1/3	ENST00000380293.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
AVP	ENST00000380293.3	c.20C>T	p.Pro7Leu	missense_variant	1/3	1	NM_000490.5	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 33

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Diabetes insipidus, neurohypophyseal, autosomal recessive Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Sep 01, 2004

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.096
BayesDel_addAF	Uncertain	0.023	T
BayesDel_noAF	Benign	-0.21
CADD	Benign	17
DANN	Benign	0.74
DEOGEN2	Uncertain	0.44	T
Eigen	Benign	-0.78
Eigen_PC	Benign	-0.69
FATHMM_MKL	Uncertain	0.85	D
LIST_S2	Benign	0.69	T
M_CAP	Uncertain	0.086	D
MetaRNN	Uncertain	0.52	D
MetaSVM	Benign	-0.29	T
MutationAssessor	Benign	1.5	L
MutationTaster	Benign	0.0000025	A
PrimateAI	Benign	0.47	T
PROVEAN	Uncertain	-3.0	D
REVEL	Benign	0.23
Sift	Benign	0.15	T
Sift4G	Benign	0.28	T
Polyphen		0.020	B
Vest4		0.19
MutPred		0.32		Gain of helix (P = 0.0325);
MVP		0.96
MPC		0.56
ClinPred		0.17	T
GERP RS		2.4
Varity_R		0.058
gMVP		0.56

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: rs121964892; hg19: chr20-3065301; COSMIC: COSV66672106;