Genetic Variant AQP12A:p.Thr99Met (chr2-240692246-C-T) – ACMG Classification: Likely_benign (-5 pts)

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 0P and 5B. BP4BS2

The NM_198998.3(AQP12A):c.296C>T(p.Thr99Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000139 in 1,578,606 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000069 ( 0 hom., cov: 30)

Exomes 𝑓: 0.000015 ( 3 hom. )

Consequence

AQP12A
NM_198998.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.92

Variant links:

Genes affected

AQP12A (HGNC:19941): (aquaporin 12A) Predicted to enable channel activity. Predicted to be involved in transmembrane transport. Predicted to be integral component of membrane. Predicted to be active in cytoplasm. [provided by Alliance of Genome Resources, Apr 2022]

AQP12A links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -5 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.4096553).

BS2

High Homozygotes in GnomAdExome4 at 3 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
AQP12A	NM_198998.3 link	c.296C>T	p.Thr99Met	missense_variant	Exon 2 of 4	ENST00000337801.9	NP_945349.1	Q8IXF9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
AQP12A	ENST00000337801.9 link	c.296C>T	p.Thr99Met	missense_variant	Exon 2 of 4	1	NM_198998.3	ENSP00000337144.4		Q8IXF9

Frequencies

GnomAD3 genomes

AF:

0.00000690

AC:

AN:

144850

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000731

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000460

AC:

AN:

239232

Hom.:

AF XY:

0.0000613

AC XY:

AN XY:

130524

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000136

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000116

Gnomad SAS exome

AF:

0.000135

Gnomad FIN exome

AF:

0.0000481

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000146

AC:

AN:

1433756

Hom.:

Cov.:

AF XY:

0.0000266

AC XY:

AN XY:

713722

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000103

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000535

Gnomad4 SAS exome

AF:

0.000120

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000363

Gnomad4 OTH exome

AF:

0.0000169

GnomAD4 genome

AF:

0.00000690

AC:

AN:

144850

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

70498

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.0000731

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

ExAC

AF:

0.0000424

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Feb 03, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.296C>T (p.T99M) alteration is located in exon 2 (coding exon 2) of the AQP12A gene. This alteration results from a C to T substitution at nucleotide position 296, causing the threonine (T) at amino acid position 99 to be replaced by a methionine (M). 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

Benign

0.089

BayesDel_addAF

Benign

-0.31

BayesDel_noAF

Benign

-0.44

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.57

D;.

Eigen

Benign

0.12

Eigen_PC

Benign

-0.083

FATHMM_MKL

Benign

0.70

LIST_S2

Benign

0.68

T;T

M_CAP

Benign

0.012

MetaRNN

Benign

0.41

T;T

MetaSVM

Benign

-1.0

MutationAssessor

Uncertain

2.5

M;.

PrimateAI

Uncertain

0.62

PROVEAN

Uncertain

-3.1

D;D

REVEL

Benign

0.22

Sift

Uncertain

0.0020

D;D

Sift4G

Uncertain

0.0020

D;D

Polyphen

1.0

D;.

Vest4

0.25

MutPred

0.70

Loss of catalytic residue at T99 (P = 0.073);.;

MVP

0.49

MPC

1.1

ClinPred

0.41

GERP RS

2.6

Varity_R

0.16

gMVP

0.66

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