11-26441971-C-G

Position:

• chr11-26441971-C-G

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_Moderate BS2

The NM_031418.4(ANO3):​c.100C>G​(p.Arg34Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000431 in 1,461,828 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 Uncertain significance (★★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.000043 (0 hom.)
• Consequence: ANO3 NM_031418.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: -0.849

Genes affected

ANO3 (HGNC:14004): (anoctamin 3) The protein encoded by this gene belongs to the TMEM16 family of predicted membrane proteins, that are also known as anoctamins. While little is known about the function of this gene, mutations in this gene have been associated with some cases of autosomal dominant craniocervical dystonia. Cells from individuals with a mutation in this gene exhibited abnormalities in endoplasmic reticulum-dependent calcium signaling. Studies in rat show that the rat ortholog of this protein interacts with, and modulates the activity of a sodium-activated potassium channel. Deletion of this gene caused increased pain sensitivity in the rat model system. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Aug 2015]

ACMG classification

Verdict is Likely_benign. Variant got -6 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.2171219).
• BS2: High AC in GnomAdExome4 at 63 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ANO3	NM_031418.4	c.100C>G	p.Arg34Gly	missense_variant	2/27	ENST00000256737.8
ANO3	NM_001313726.2	c.283C>G	p.Arg95Gly	missense_variant	3/28
ANO3	XM_047427399.1	c.100C>G	p.Arg34Gly	missense_variant	2/26

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ANO3	ENST00000256737.8	c.100C>G	p.Arg34Gly	missense_variant	2/27	1	NM_031418.4	P3
ANO3	ENST00000672621.1	c.283C>G	p.Arg95Gly	missense_variant	3/28
ANO3	ENST00000525139.5	c.52C>G	p.Arg18Gly	missense_variant	2/27	5
ANO3	ENST00000531646.1	c.100C>G	p.Arg34Gly	missense_variant	2/5	4

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD3 exomes AF: 0.00000796 AC: 2 AN: 251232 Hom.: 0 AF XY: 0.0000147 AC XY: 2 AN XY: 135762

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000176

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000431 AC: 63 AN: 1461828 Hom.: 0 Cov.: 30 AF XY: 0.0000385 AC XY: 28 AN XY: 727212

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: 0.0000116

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000495

Gnomad4 OTH exome AF: 0.000116

GnomAD4 genome Cov.: 33

Alfa AF: 0.0000564 Hom.: 0

Bravo AF: 0.00000756

ESP6500AA AF: 0.00 AC: 0

ESP6500EA AF: 0.000349 AC: 3

ExAC AF: 0.0000165 AC: 2

EpiCase AF: 0.000109

EpiControl AF: 0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Oct 07, 2019

In silico analysis, which includes protein predictors and evolutionary conservation, supports a deleterious effect; Has not been previously published as pathogenic or benign to our knowledge -

Dystonic disorder Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Apr 01, 2022

Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt ANO3 protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. ClinVar contains an entry for this variant (Variation ID: 1308907). This variant has not been reported in the literature in individuals affected with ANO3-related conditions. This variant is present in population databases (rs373387931, gnomAD 0.004%). This sequence change replaces arginine, which is basic and polar, with glycine, which is neutral and non-polar, at codon 34 of the ANO3 protein (p.Arg34Gly). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.44
BayesDel_addAF	Uncertain	0.050	T
BayesDel_noAF	Uncertain	-0.060
CADD	Benign	18
DANN	Uncertain	1.0
DEOGEN2	Benign	0.080	T;T;T
Eigen	Benign	-0.19
Eigen_PC	Benign	-0.31
FATHMM_MKL	Benign	0.15	N
LIST_S2	Benign	0.81	T;T;T
M_CAP	Benign	0.052	D
MetaRNN	Benign	0.22	T;T;T
MetaSVM	Benign	-0.60	T
MutationTaster	Benign	0.98	D;D;D;D
PrimateAI	Benign	0.46	T
PROVEAN	Benign	-1.3	N;N;D
REVEL	Benign	0.28
Sift	Uncertain	0.0050	D;D;D
Sift4G	Uncertain	0.018	D;D;T
Polyphen		1.0	.;D;.
Vest4		0.38
MVP		0.46
MPC		0.28
ClinPred		0.79	D
GERP RS		-4.3
Varity_R		0.27
gMVP		0.53

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: rs373387931; hg19: chr11-26463518;