12-49950844-G-A

Position:

chr12-49950844-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM1

The ENST00000199280.4(AQP2):c.14G>A(p.Arg5His) variant causes a missense change. The variant allele was found at a frequency of 0.0000856 in 1,612,114 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R5C) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000066 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000088 ( 0 hom. )

Consequence

AQP2
ENST00000199280.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 6.78

Variant links:

Genes affected

AQP2 (HGNC:634): (aquaporin 2) This gene encodes a water channel protein located in the kidney collecting tubule. It belongs to the MIP/aquaporin family, some members of which are clustered together on chromosome 12q13. Mutations in this gene have been linked to autosomal dominant and recessive forms of nephrogenic diabetes insipidus. [provided by RefSeq, Oct 2008]

AQP2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM1

In a chain Aquaporin-2 (size 270) in uniprot entity AQP2_HUMAN there are 44 pathogenic changes around while only 9 benign (83%) in ENST00000199280.4

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
AQP2	NM_000486.6 linkuse as main transcript	c.14G>A	p.Arg5His	missense_variant	1/4	ENST00000199280.4	NP_000477.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris
AQP2	ENST00000199280.4 linkuse as main transcript	c.14G>A	p.Arg5His	missense_variant	1/4	1	NM_000486.6	ENSP00000199280	P1
AQP2	ENST00000550862.1 linkuse as main transcript	c.14G>A	p.Arg5His	missense_variant	1/3	5		ENSP00000450022
AQP2	ENST00000551526.5 linkuse as main transcript	c.14G>A	p.Arg5His	missense_variant, NMD_transcript_variant	1/6	5		ENSP00000447148

Frequencies

GnomAD3 genomes

AF:

0.0000657

AC:

AN:

152256

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000723

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000192

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000882

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000518

AC:

AN:

251030

Hom.:

AF XY:

0.0000368

AC XY:

AN XY:

135714

show subpopulations

Gnomad AFR exome

AF:

0.0000616

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000106

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000877

AC:

128

AN:

1459858

Hom.:

Cov.:

AF XY:

0.0000827

AC XY:

AN XY:

725848

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000109

Gnomad4 OTH exome

AF:

0.0000829

GnomAD4 genome

AF:

0.0000657

AC:

AN:

152256

Hom.:

Cov.:

AF XY:

0.0000538

AC XY:

AN XY:

74386

show subpopulations

Gnomad4 AFR

AF:

0.0000723

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000192

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000882

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000806

Hom.:

Bravo

AF:

0.0000642

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.00

AC:

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.0000412

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.000119

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Oct 12, 2021

The c.14G>A (p.R5H) alteration is located in exon 1 (coding exon 1) of the AQP2 gene. This alteration results from a G to A substitution at nucleotide position 14, causing the arginine (R) at amino acid position 5 to be replaced by a histidine (H). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Oct 16, 2022

This sequence change replaces arginine, which is basic and polar, with histidine, which is basic and polar, at codon 5 of the AQP2 protein (p.Arg5His). This variant is present in population databases (rs148006652, gnomAD 0.009%). This variant has not been reported in the literature in individuals affected with AQP2-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.27

BayesDel_addAF

Uncertain

0.071

BayesDel_noAF

Uncertain

0.060

CADD

Uncertain

DANN

Pathogenic

1.0

DEOGEN2

Pathogenic

0.82

D;D

Eigen

Uncertain

0.52

Eigen_PC

Uncertain

0.53

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Uncertain

0.96

D;D

M_CAP

Benign

0.050

MetaRNN

Uncertain

0.72

D;D

MetaSVM

Uncertain

0.16

MutationAssessor

Uncertain

2.6

M;.

MutationTaster

Benign

1.0

PrimateAI

Uncertain

0.72

PROVEAN

Benign

-1.5

N;N

REVEL

Uncertain

0.61

Sift

Benign

0.050

D;D

Sift4G

Benign

0.11

T;T

Polyphen

0.92

P;.

Vest4

0.50

MVP

0.94

MPC

1.0

ClinPred

0.61

GERP RS

4.4

Varity_R

0.28

gMVP

0.40

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over