chr15-58166775-A-G

Position:

• chr15-58166775-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_020980.5(AQP9):​c.214A>G​(p.Ile72Val) 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. 15/21 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)
• Consequence: AQP9 NM_020980.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.52

Genes affected

AQP9 (HGNC:643): (aquaporin 9) The aquaporins are a family of water-selective membrane channels. This gene encodes a member of a subset of aquaporins called the aquaglyceroporins. This protein allows passage of a broad range of noncharged solutes and also stimulates urea transport and osmotic water permeability. This protein may also facilitate the uptake of glycerol in hepatic tissue . The encoded protein may also play a role in specialized leukocyte functions such as immunological response and bactericidal activity. Alternate splicing results in multiple transcript variants. [provided by RefSeq, Mar 2016]

ALDH1A2 (HGNC:15472): (aldehyde dehydrogenase 1 family member A2) This protein belongs to the aldehyde dehydrogenase family of proteins. The product of this gene is an enzyme that catalyzes the synthesis of retinoic acid (RA) from retinaldehyde. Retinoic acid, the active derivative of vitamin A (retinol), is a hormonal signaling molecule that functions in developing and adult tissues. The studies of a similar mouse gene suggest that this enzyme and the cytochrome CYP26A1, concurrently establish local embryonic retinoic acid levels which facilitate posterior organ development and prevent spina bifida. Four transcript variants encoding distinct isoforms have been identified for this gene. [provided by RefSeq, May 2011]

ACMG classification

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=0.13399783).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
AQP9	NM_020980.5	c.214A>G	p.Ile72Val	missense_variant	2/6	ENST00000219919.9
AQP9	NM_001320636.1	c.19A>G	p.Ile7Val	missense_variant	2/6
AQP9	NM_001320635.2	c.214A>G	p.Ile72Val	missense_variant	2/5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
AQP9	ENST00000219919.9	c.214A>G	p.Ile72Val	missense_variant	2/6	1	NM_020980.5	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 08, 2023

The c.214A>G (p.I72V) alteration is located in exon 2 (coding exon 2) of the AQP9 gene. This alteration results from a A to G substitution at nucleotide position 214, causing the isoleucine (I) at amino acid position 72 to be replaced by a valine (V). 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	0.097
BayesDel_addAF	Benign	-0.35	T
BayesDel_noAF	Benign	-0.74
CADD	Benign	12
DANN	Benign	0.62
DEOGEN2	Benign	0.20	T;T;T
Eigen	Benign	-0.91
Eigen_PC	Benign	-0.76
FATHMM_MKL	Benign	0.11	N
LIST_S2	Uncertain	0.86	D;.;D
M_CAP	Benign	0.0034	T
MetaRNN	Benign	0.13	T;T;T
MetaSVM	Benign	-0.92	T
MutationAssessor	Benign	-0.33	.;N;N
MutationTaster	Benign	1.0	D;N;N;N
PrimateAI	Benign	0.34	T
PROVEAN	Benign	0.070	N;N;N
REVEL	Benign	0.040
Sift	Benign	0.43	T;T;T
Sift4G	Benign	0.82	T;T;T
Polyphen		0.012	.;B;B
Vest4		0.10
MutPred		0.47		.;Loss of helix (P = 0.2022);Loss of helix (P = 0.2022);
MVP		0.17
MPC		0.011
ClinPred		0.21	T
GERP RS		1.0
Varity_R		0.022
gMVP		0.55

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.

Other links and lift over

hg19: chr15-58458974;