rs201773300

Positions:

• chr9-33385742-A-T

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 2P and 6B. PM2 BP4_Strong BP6_Moderate

The NM_001170.3(AQP7):​c.650T>A​(p.Leu217His) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,584 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: AQP7 NM_001170.3 missense
• Clinical Significance: Benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 9.32

Genes affected

AQP7 (HGNC:640): (aquaporin 7) This gene encodes a member of the aquaporin family of water-selective membrane channels. The encoded protein localizes to the plasma membrane and allows movement of water, glycerol and urea across cell membranes. This gene is highly expressed in the adipose tissue where the encoded protein facilitates efflux of glycerol. In the proximal straight tubules of kidney, the encoded protein is localized to the apical membrane and prevents excretion of glycerol into urine. The encoded protein is present in spermatids, as well as in the testicular and epididymal spermatozoa suggesting an important role in late spermatogenesis. Alternative splicing of this gene results in multiple transcript variants encoding different isoforms. This gene is located adjacent to a related aquaporin gene on chromosome 9. Multiple pseudogenes of this gene have been identified. [provided by RefSeq, Dec 2015]

ACMG classification

Verdict is Likely_benign. Variant got -4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.0118846).
• BP6: Variant 9-33385742-A-T is Benign according to our data. Variant chr9-33385742-A-T is described in ClinVar as [Benign]. Clinvar id is 402385.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
AQP7	NM_001170.3	c.650T>A	p.Leu217His	missense_variant	7/8	ENST00000297988.6	NP_001161.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
AQP7	ENST00000297988.6	c.650T>A	p.Leu217His	missense_variant	7/8	1	NM_001170.3	ENSP00000297988	P2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461584 Hom.: 0 Cov.: 33 AF XY: 0.00000138 AC XY: 1 AN XY: 727084

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

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.: 33

Alfa AF: 0.137 Hom.: 0

ExAC AF: 0.0518 AC: 6294

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Benign:1

Benign, criteria provided, single submitter

clinical testing

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Mar 28, 2016

Variant identified in a genome or exome case(s) and assessed due to predicted null impact of the variant or pathogenic assertions in the literature or databases. Disclaimer: This variant has not undergone full assessment. The following are preliminary notes: Fails quality filter; no convincing gene-disease relationship -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.60
BayesDel_addAF	Pathogenic	0.19	D
BayesDel_noAF	Uncertain	0.040
CADD	Benign	23
DANN	Benign	0.57
DEOGEN2	Uncertain	0.78	.;D;D;.;.;D;.
Eigen	Benign	-0.30
Eigen_PC	Benign	-0.26
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Benign	0.56	T;T;T;T;T;T;T
MetaRNN	Benign	0.012	T;T;T;T;T;T;T
MetaSVM	Benign	-0.38	T
MutationTaster	Benign	0.99	D;D;D;D;D;D;D;D
PrimateAI	Benign	0.45	T
PROVEAN	Uncertain	-3.8	D;D;D;D;D;.;.
REVEL	Uncertain	0.47
Sift	Benign	0.085	T;T;T;T;T;.;.
Sift4G	Benign	0.075	T;D;T;.;T;T;T
Polyphen		0.0080, 0.0040, 0.014, 0.0060	.;B;B;.;B;B;.
Vest4		0.22
MPC		0.31
ClinPred		0.090	T
GERP RS		3.9
Varity_R		0.74

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs201773300; hg19: chr9-33385740; COSMIC: COSV53005868; COSMIC: COSV53005868;