Variant chr18-26861158-A-T details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_001650.7(AQP4):c.585T>A(p.Phe195Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,461,838 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0000021 ( 0 hom. )

Consequence

AQP4
NM_001650.7 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.406

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 Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.15617073).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
AQP4	NM_001650.7 linkuse as main transcript	c.585T>A	p.Phe195Leu	missense_variant	3/5	ENST00000383168.9	NP_001641.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
AQP4	ENST00000383168.9 linkuse as main transcript	c.585T>A	p.Phe195Leu	missense_variant	3/5	1	NM_001650.7	ENSP00000372654	P1	P55087-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000205

AC:

AN:

1461838

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727212

show subpopulations

Gnomad4 AFR exome

AF:

0.00

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:

0.00

Gnomad4 NFE exome

AF:

0.00000180

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

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

Ambry Genetics

Feb 21, 2024

The c.585T>A (p.F195L) alteration is located in exon 3 (coding exon 3) of the AQP4 gene. This alteration results from a T to A substitution at nucleotide position 585, causing the phenylalanine (F) at amino acid position 195 to be replaced by a leucine (L). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.52

BayesDel_addAF

Benign

-0.037

BayesDel_noAF

Benign

-0.29

CADD

Benign

DANN

Benign

0.80

DEOGEN2

Uncertain

0.43

T;.;.;T

Eigen

Benign

-0.69

Eigen_PC

Benign

-0.47

FATHMM_MKL

Uncertain

0.76

LIST_S2

Benign

0.81

T;.;T;T

M_CAP

Benign

0.013

MetaRNN

Benign

0.16

T;T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

-1.3

N;.;.;.

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Uncertain

0.73

PROVEAN

Benign

0.62

N;.;.;.

REVEL

Benign

0.24

Sift

Benign

1.0

T;.;.;.

Sift4G

Benign

1.0

T;T;T;.

Polyphen

0.0010

B;.;.;.

Vest4

0.23

MutPred

0.73

Loss of glycosylation at S196 (P = 0.0947);.;.;.;

MVP

0.73

MPC

0.15

ClinPred

0.32

GERP RS

1.7

Varity_R

0.25

gMVP

0.57

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

No publications associated with this variant yet.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over