rs398123057

Positions:

• chr12-49963495-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 3P and 1B. PM2 PP5 BP4

The ENST00000293599.7(AQP5):​c.367A>G​(p.Asn123Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 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 Pathogenic (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. N123K) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 33)
• Consequence: AQP5 ENST00000293599.7 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 0.898

Genes affected

AQP5 (HGNC:638): (aquaporin 5) Aquaporin 5 (AQP5) is a water channel protein. Aquaporins are a family of small integral membrane proteins related to the major intrinsic protein (MIP or AQP0). Aquaporin 5 plays a role in the generation of saliva, tears and pulmonary secretions. AQP0, AQP2, AQP5, and AQP6 are closely related and all map to 12q13. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 12-49963495-A-G is Pathogenic according to our data. Variant chr12-49963495-A-G is described in ClinVar as [Pathogenic]. Clinvar id is 65482.Status of the report is no_assertion_criteria_provided, 0 stars.
• BP4: Computational evidence support a benign effect (MetaRNN=0.35149708). . Strength limited to SUPPORTING due to the PP5.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
AQP5	NM_001651.4	c.367A>G	p.Asn123Asp	missense_variant	2/4	ENST00000293599.7	NP_001642.1
AQP5	XM_005268838.3	c.367A>G	p.Asn123Asp	missense_variant	2/5		XP_005268895.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
AQP5	ENST00000293599.7	c.367A>G	p.Asn123Asp	missense_variant	2/4	1	NM_001651.4	ENSP00000293599	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Palmoplantar keratoderma, Bothnian type Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Aug 08, 2013

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.27
BayesDel_addAF	Benign	-0.092	T
BayesDel_noAF	Benign	-0.37
CADD	Benign	21
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.57	D
Eigen	Benign	-0.27
Eigen_PC	Benign	-0.13
FATHMM_MKL	Benign	0.68	D
LIST_S2	Benign	0.84	T
M_CAP	Benign	0.039	D
MetaRNN	Benign	0.35	T
MetaSVM	Benign	-0.61	T
MutationAssessor	Benign	0.70	N
MutationTaster	Benign	0.94	N
PrimateAI	Uncertain	0.49	T
PROVEAN	Benign	-1.8	N
REVEL	Benign	0.20
Sift	Benign	0.28	T
Sift4G	Benign	0.16	T
Polyphen		0.0010	B
Vest4		0.57
MutPred		0.48		Loss of loop (P = 0.0986);
MVP		0.87
MPC		0.44
ClinPred		0.48	T
GERP RS		3.4
Varity_R		0.60
gMVP		0.62

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

Other links and lift over

dbSNP: rs398123057; hg19: chr12-50357278;