18-26861165-A-G

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 1P and 6B. PP3BP4_StrongBP6_Moderate

The NM_001650.7(AQP4):c.578T>C(p.Ile193Thr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000403 in 1,614,138 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

Frequency

Genomes: 𝑓 0.0023 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00021 ( 2 hom. )

Consequence

AQP4
NM_001650.7 missense

Scores

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: 8.95

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:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -5 ACMG points.

PP3

Multiple lines of computational evidence support a deleterious effect 7: AlphaMissense, BayesDel_noAF, Eigen, MutationAssessor, phyloP100way_vertebrate, PROVEAN, REVEL [when max_spliceai, FATHMM_MKL, MetaRNN, MutationTaster was below the threshold]

BP4

Computational evidence support a benign effect (MetaRNN=0.018962353).

BP6

Variant 18-26861165-A-G is Benign according to our data. Variant chr18-26861165-A-G is described in ClinVar as [Likely_benign]. Clinvar id is 709494.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
AQP4	NM_001650.7 linkuse as main transcript	c.578T>C	p.Ile193Thr	missense_variant	3/5	ENST00000383168.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
AQP4	ENST00000383168.9 linkuse as main transcript	c.578T>C	p.Ile193Thr	missense_variant	3/5	1	NM_001650.7	P1	P55087-1

Frequencies

GnomAD3 genomes

AF:

0.00225

AC:

342

AN:

152182

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00808

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00191

GnomAD3 exomes

AF:

0.000521

AC:

131

AN:

251442

Hom.:

AF XY:

0.000361

AC XY:

AN XY:

135892

show subpopulations

Gnomad AFR exome

AF:

0.00794

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:

0.00

Gnomad OTH exome

AF:

0.000326

GnomAD4 exome

AF:

0.000210

AC:

307

AN:

1461838

Hom.:

Cov.:

AF XY:

0.000197

AC XY:

143

AN XY:

727214

show subpopulations

Gnomad4 AFR exome

AF:

0.00806

Gnomad4 AMR exome

AF:

0.0000894

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000348

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000270

Gnomad4 OTH exome

AF:

0.000397

GnomAD4 genome

AF:

0.00226

AC:

344

AN:

152300

Hom.:

Cov.:

AF XY:

0.00213

AC XY:

159

AN XY:

74482

show subpopulations

Gnomad4 AFR

AF:

0.00811

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00189

Alfa

AF:

0.00103

Hom.:

Bravo

AF:

0.00229

ESP6500AA

AF:

0.00817

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000774

AC:

Asia WGS

AF:

0.000866

AC:

AN:

3478

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Invitae

Jun 15, 2018

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.64

BayesDel_addAF

Uncertain

0.15

BayesDel_noAF

Pathogenic

0.45

Cadd

Uncertain

Dann

Uncertain

1.0

DEOGEN2

Pathogenic

0.93

D;.;.;D

Eigen

Pathogenic

0.93

Eigen_PC

Pathogenic

0.88

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.96

D;.;D;D

MetaRNN

Benign

0.019

T;T;T;T

MetaSVM

Uncertain

0.77

MutationAssessor

Pathogenic

3.3

M;.;.;.

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Uncertain

0.75

PROVEAN

Pathogenic

-4.4

D;.;.;.

REVEL

Pathogenic

0.94

Sift

Pathogenic

0.0

D;.;.;.

Sift4G

Pathogenic

0.0

D;D;D;.

Polyphen

1.0

D;.;.;.

Vest4

0.93

MVP

0.99

MPC

0.65

ClinPred

0.16

GERP RS

5.6

Varity_R

0.80

gMVP

0.90

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.040

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