chr11-26441918-G-A

Variant names:

• chr11-26441918-G-A
• rs1408780131
• NM_031418.4:c.47G>A

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2 PP3

The NM_031418.4(ANO3):​c.47G>A​(p.Gly16Asp) variant causes a missense, splice region change. The variant allele was found at a frequency of 0.00000658 in 152,026 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 2/3 splice prediction tools predicting alterations to normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G16C) has been classified as Uncertain significance.

• Frequency: Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
• Consequence: ANO3 NM_031418.4 missense, splice_region
• Scores: Splicing: ADA: 0.9996
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 5.83
• Publications: 0 publications found

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]

ANO3 Gene-Disease associations (from GenCC):

• dystonia 24

  Inheritance: AD Classification: STRONG, SUPPORTIVE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Genomics England PanelApp, G2P, Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: Splicing predictors support a deleterious effect. Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF. No scorers claiming Uncertain. Scorers claiming Benign: max_spliceai.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_031418.4. 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
	ANO3	NM_031418.4	MANE Select	c.47G>A	p.Gly16Asp	missense splice_region	Exon 2 of 27	NP_113606.2	Q9BYT9-1
	ANO3	NM_001313726.2		c.230G>A	p.Gly77Asp	missense splice_region	Exon 3 of 28	NP_001300655.1	A0A5F9ZHL6

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ANO3	ENST00000256737.8	TSL:1 MANE Select	c.47G>A	p.Gly16Asp	missense splice_region	Exon 2 of 27	ENSP00000256737.3	Q9BYT9-1
	ANO3	ENST00000672621.1		c.230G>A	p.Gly77Asp	missense splice_region	Exon 3 of 28	ENSP00000500506.1	A0A5F9ZHL6
	ANO3	ENST00000525139.5	TSL:5	c.-2G>A		splice_region	Exon 2 of 27	ENSP00000432576.1	E9PQ79

Frequencies

GnomAD3 genomes AF: 0.00000658 AC: 1 AN: 152026 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000147

Gnomad OTH AF: 0.00

GnomAD4 exome Cov.: 30

GnomAD4 genome AF: 0.00000658 AC: 1 AN: 152026 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 74258

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 41368

American (AMR) AF: 0.00 AC: 0 AN: 15274

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3466

East Asian (EAS) AF: 0.00 AC: 0 AN: 5178

South Asian (SAS) AF: 0.00 AC: 0 AN: 4824

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10588

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.0000147 AC: 1 AN: 68010

Other (OTH) AF: 0.00 AC: 0 AN: 2090

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.24
BayesDel_addAF	Pathogenic	0.19	D
BayesDel_noAF	Uncertain	0.030
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Benign	0.076	T
Eigen	Benign	0.16
Eigen_PC	Uncertain	0.35
FATHMM_MKL	Uncertain	0.91	D
LIST_S2	Benign	0.79	T
M_CAP	Benign	0.069	D
MetaRNN	Benign	0.41	T
MetaSVM	Benign	-0.98	T
MutationAssessor	Benign	1.4	L
PhyloP100		5.8
PrimateAI	Uncertain	0.78	T
PROVEAN	Benign	-0.91	N
REVEL	Benign	0.19
Sift	Uncertain	0.012	D
Sift4G	Benign	0.12	T
Polyphen		0.39	B
Vest4		0.66
MutPred		0.19		Gain of ubiquitination at K12 (P = 0.0198)
MVP		0.54
MPC		0.44
ClinPred		0.95	D
GERP RS		5.6
Varity_R		0.30
gMVP		0.42
Mutation Taster		=39/61	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	0.82
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: rs1408780131; hg19: chr11-26463465;