Variant chr18-26856228-C-T details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_001650.7(AQP4):c.955G>A(p.Val319Ile) variant causes a missense change. The variant allele was found at a frequency of 0.000402 in 1,614,102 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00053 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00039 ( 0 hom. )

Consequence

AQP4
NM_001650.7 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.34

Variant links:

Genes affected

AQP4 (HGNC:637): (aquaporin 4) This gene encodes a member of the aquaporin family of intrinsic membrane proteins that function as water-selective channels in the plasma membranes of many cells. This protein is the predominant aquaporin found in brain and has an important role in brain water homeostasis. Alternatively spliced transcript variants encoding different isoforms have been described for this gene. Additional isoforms, resulting from the use of alternative in-frame translation initiation codons, have also been described. Recent studies provided evidence for translational readthrough in this gene, and expression of C-terminally extended isoforms via the use of an alternative in-frame translation termination codon. [provided by RefSeq, Jun 2018]

AQP4 links:

AQP4-AS1 (HGNC:26399): (AQP4 antisense RNA 1)

AQP4-AS1 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.01529479).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
AQP4	NM_001650.7 linkuse as main transcript	c.955G>A	p.Val319Ile	missense_variant	5/5	ENST00000383168.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
AQP4	ENST00000383168.9 linkuse as main transcript	c.955G>A	p.Val319Ile	missense_variant	5/5	1	NM_001650.7	P1	P55087-1

Frequencies

GnomAD3 genomes

AF:

0.000526

AC:

AN:

152094

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00236

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000794

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000636

AC:

160

AN:

251484

Hom.:

AF XY:

0.000677

AC XY:

AN XY:

135914

show subpopulations

Gnomad AFR exome

AF:

0.000123

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:

0.00337

Gnomad NFE exome

AF:

0.000730

Gnomad OTH exome

AF:

0.000326

GnomAD4 exome

AF:

0.000389

AC:

569

AN:

1461890

Hom.:

Cov.:

AF XY:

0.000400

AC XY:

291

AN XY:

727244

show subpopulations

Gnomad4 AFR exome

AF:

0.0000597

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00316

Gnomad4 NFE exome

AF:

0.000329

Gnomad4 OTH exome

AF:

0.000513

GnomAD4 genome

AF:

0.000526

AC:

AN:

152212

Hom.:

Cov.:

AF XY:

0.000632

AC XY:

AN XY:

74406

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.0000654

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00236

Gnomad4 NFE

AF:

0.000794

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000613

Hom.:

Bravo

AF:

0.000287

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000259

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000581

AC:

ExAC

AF:

0.000610

AC:

EpiCase

AF:

0.000327

EpiControl

AF:

0.000119

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Genomic Diagnostic Laboratory, Division of Genomic Diagnostics, Children's Hospital of Philadelphia

Oct 16, 2015

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.090

BayesDel_addAF

Benign

-0.25

BayesDel_noAF

Benign

-0.14

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.42

T;.;.

Eigen

Benign

0.081

Eigen_PC

Uncertain

0.27

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.88

D;.;D

M_CAP

Benign

0.030

MetaRNN

Benign

0.015

T;T;T

MetaSVM

Uncertain

-0.24

MutationAssessor

Benign

1.2

L;.;.

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Uncertain

0.51

PROVEAN

Benign

-0.22

N;.;.

REVEL

Uncertain

0.37

Sift

Benign

0.093

T;.;.

Sift4G

Benign

0.13

T;T;T

Polyphen

0.13

B;.;.

Vest4

0.38

MVP

0.77

MPC

0.10

ClinPred

0.041

GERP RS

5.8

Varity_R

0.070

gMVP

0.37

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