NM_001651.4:c.367A>G

Variant names:

• chr12-49963495-A-G
• rs398123057
• NM_001651.4:c.367A>G

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 3P and 1B. PM2 PP5 BP4

The NM_001651.4(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. 15/22 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 NM_001651.4 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 0.898
• Publications: 6 publications found

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]

AQP5-AS1 (HGNC:55474): (AQP5 and AQP2 antisense RNA 2)

ACMG classification

Our verdict: Uncertain_significance. The variant received 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 VariationId 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.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001651.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	AQP5	NM_001651.4	MANE Select	c.367A>G	p.Asn123Asp	missense	Exon 2 of 4	NP_001642.1	P55064

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	AQP5	ENST00000293599.7	TSL:1 MANE Select	c.367A>G	p.Asn123Asp	missense	Exon 2 of 4	ENSP00000293599.5	P55064
	AQP5	ENST00000857226.1		c.364-597A>G		intron	N/A	ENSP00000527285.1
	AQP5-AS1	ENST00000750790.1		n.301+2188T>C		intron	N/A

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 0

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
1	-	-	Palmoplantar keratoderma, Bothnian type (1)

Computational scores

Source: dbNSFP v4.9

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
PhyloP100		0.90
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
Mutation Taster		=32/68	disease causing (ClinVar)

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

Other links and lift over

dbSNP: rs398123057; hg19: chr12-50357278;