rs1554919178

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 0P and 2B. BP4_Moderate

The NM_213599.3(ANO5):​c.87G>A​(p.Glu29Glu) variant causes a splice region, synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000409 in 1,467,852 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 predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)
Exomes 𝑓: 0.0000038 ( 0 hom. )

Consequence

ANO5
NM_213599.3 splice_region, synonymous

Scores

2
Splicing: ADA: 0.1698
2

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 1.76

Publications

0 publications found
Variant links:
Genes affected
ANO5 (HGNC:27337): (anoctamin 5) This gene encodes a member of the anoctamin family of transmembrane proteins. The encoded protein is likely a calcium activated chloride channel. Mutations in this gene have been associated with gnathodiaphyseal dysplasia. Alternatively spliced transcript variants have been described. [provided by RefSeq, Nov 2009]
ANO5 Gene-Disease associations (from GenCC):
  • autosomal recessive limb-girdle muscular dystrophy
    Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
  • gnathodiaphyseal dysplasia
    Inheritance: AD Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), G2P
  • autosomal recessive limb-girdle muscular dystrophy type 2L
    Inheritance: AR Classification: STRONG, SUPPORTIVE, LIMITED Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), G2P
  • Miyoshi muscular dystrophy 3
    Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

BP4
Computational evidence support a benign effect (BayesDel_noAF=-0.27).

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect Exon rank MANE Protein UniProt
ANO5NM_213599.3 linkc.87G>A p.Glu29Glu splice_region_variant, synonymous_variant Exon 2 of 22 ENST00000324559.9 NP_998764.1 Q75V66

Ensembl

Gene Transcript HGVSc HGVSp Effect Exon rank TSL MANE Protein Appris UniProt
ANO5ENST00000324559.9 linkc.87G>A p.Glu29Glu splice_region_variant, synonymous_variant Exon 2 of 22 1 NM_213599.3 ENSP00000315371.9 Q75V66

Frequencies

GnomAD3 genomes
AF:
0.00000659
AC:
1
AN:
151782
Hom.:
0
Cov.:
32
show subpopulations
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
AF:
0.00000380
AC:
5
AN:
1316070
Hom.:
0
Cov.:
25
AF XY:
0.00000152
AC XY:
1
AN XY:
658762
show subpopulations
⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.
African (AFR)
AF:
0.00
AC:
0
AN:
30352
American (AMR)
AF:
0.00
AC:
0
AN:
42854
Ashkenazi Jewish (ASJ)
AF:
0.00
AC:
0
AN:
24274
East Asian (EAS)
AF:
0.00
AC:
0
AN:
38166
South Asian (SAS)
AF:
0.00
AC:
0
AN:
82438
European-Finnish (FIN)
AF:
0.00
AC:
0
AN:
51336
Middle Eastern (MID)
AF:
0.00
AC:
0
AN:
5366
European-Non Finnish (NFE)
AF:
0.00000406
AC:
4
AN:
986420
Other (OTH)
AF:
0.0000182
AC:
1
AN:
54864
⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.0000000399846), which strongly suggests a high chance of mosaicism in these individuals.
Allele Balance Distribution
Red line indicates average allele balance
Average allele balance: 0.305
Heterozygous variant carriers
0
1
1
2
2
3
0.00
0.20
0.40
0.60
0.80
0.95
Allele balance

Age Distribution

Exome Het
Variant carriers
0
2
4
6
8
10
<30
30-35
35-40
40-45
45-50
50-55
55-60
60-65
65-70
70-75
75-80
>80
Age
GnomAD4 genome
AF:
0.00000659
AC:
1
AN:
151782
Hom.:
0
Cov.:
32
AF XY:
0.00
AC XY:
0
AN XY:
74104
show subpopulations
⚠️ 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:
41376
American (AMR)
AF:
0.00
AC:
0
AN:
15224
Ashkenazi Jewish (ASJ)
AF:
0.00
AC:
0
AN:
3466
East Asian (EAS)
AF:
0.00
AC:
0
AN:
5164
South Asian (SAS)
AF:
0.00
AC:
0
AN:
4812
European-Finnish (FIN)
AF:
0.00
AC:
0
AN:
10548
Middle Eastern (MID)
AF:
0.00
AC:
0
AN:
316
European-Non Finnish (NFE)
AF:
0.0000147
AC:
1
AN:
67886
Other (OTH)
AF:
0.00
AC:
0
AN:
2080
⚠️ 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.
Allele Balance Distribution
Red line indicates average allele balance
Average allele balance: 0.375
Heterozygous variant carriers
0
0
1
1
2
2
0.00
0.20
0.40
0.60
0.80
0.95
Allele balance
Alfa
AF:
0.00
Hom.:
0

ClinVar

Significance: Uncertain significance
Submissions summary: Uncertain:2
Revision: criteria provided, multiple submitters, no conflicts
LINK: link

Submissions by phenotype

not provided Uncertain:1
Jan 24, 2018
Athena Diagnostics
Significance:Uncertain significance
Review Status:criteria provided, single submitter
Collection Method:clinical testing

- -

Gnathodiaphyseal dysplasia;C1969785:Autosomal recessive limb-girdle muscular dystrophy type 2L Uncertain:1
Jul 19, 2022
Labcorp Genetics (formerly Invitae), Labcorp
Significance:Uncertain significance
Review Status:criteria provided, single submitter
Collection Method:clinical testing

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. Variants that disrupt the consensus splice site are a relatively common cause of aberrant splicing (PMID: 17576681, 9536098). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. ClinVar contains an entry for this variant (Variation ID: 468846). This variant has been observed in individual(s) with clinical features of autosomal recessive limb-girdle muscular dystrophy (PMID: 30919934). This variant is not present in population databases (gnomAD no frequency). This sequence change affects codon 29 of the ANO5 mRNA. It is a 'silent' change, meaning that it does not change the encoded amino acid sequence of the ANO5 protein. This variant also falls at the last nucleotide of exon 2, which is part of the consensus splice site for this exon. -

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction
BayesDel_noAF
Benign
-0.27
CADD
Benign
17
DANN
Benign
0.73
PhyloP100
1.8
Mutation Taster
=52/48
polymorphism

Splicing

Name
Calibrated prediction
Score
Prediction
dbscSNV1_ADA
Benign
0.17
dbscSNV1_RF
Benign
0.43
SpliceAI score (max)
0.56
Details are displayed if max score is > 0.2
DS_DL_spliceai
0.56
Position offset: 0

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

Publications

Other links and lift over

dbSNP: rs1554919178; hg19: chr11-22225396; API