chr11-61950428-G-T
Position:
Variant summary
Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PVS1PM2PP5_Moderate
The NM_004183.4(BEST1):c.-37+1G>T variant causes a splice donor 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. 3/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Likely pathogenic (★).
Frequency
Genomes: not found (cov: 33)
Exomes 𝑓: 0.0 ( 0 hom. )
Failed GnomAD Quality Control
Consequence
BEST1
NM_004183.4 splice_donor
NM_004183.4 splice_donor
Scores
1
1
Splicing: ADA: 0.9999
2
Clinical Significance
Conservation
PhyloP100: 2.46
Genes affected
BEST1 (HGNC:12703): (bestrophin 1) This gene encodes a member of the bestrophin gene family. This small gene family is characterized by proteins with a highly conserved N-terminus with four to six transmembrane domains. Bestrophins may form chloride ion channels or may regulate voltage-gated L-type calcium-ion channels. Bestrophins are generally believed to form calcium-activated chloride-ion channels in epithelial cells but they have also been shown to be highly permeable to bicarbonate ion transport in retinal tissue. Mutations in this gene are responsible for juvenile-onset vitelliform macular dystrophy (VMD2), also known as Best macular dystrophy, in addition to adult-onset vitelliform macular dystrophy (AVMD) and other retinopathies. Alternative splicing results in multiple variants encoding distinct isoforms.[provided by RefSeq, Nov 2008]
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ACMG classification
Classification made for transcript
Verdict is Pathogenic. Variant got 12 ACMG points.
PVS1
Splicing +-2 bp (donor or acceptor) variant, LoF is a know mechanism of disease, Cryptic splice site detected, with MaxEntScore 6, offset of 11, new splice context is: aagGTgccc. Cryptic site results in frameshift change. If cryptic site found is not functional and variant results in exon loss, it results in frameshift change.
PM2
Very rare variant in population databases, with high coverage;
PP5
Variant 11-61950428-G-T is Pathogenic according to our data. Variant chr11-61950428-G-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 438184.Status of the report is criteria_provided_single_submitter, 1 stars. Variant chr11-61950428-G-T is described in Lovd as [Pathogenic]. Variant chr11-61950428-G-T is described in Lovd as [Likely_pathogenic].
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | Protein | UniProt |
---|---|---|---|---|---|---|---|---|
BEST1 | NM_004183.4 | c.-37+1G>T | splice_donor_variant | ENST00000378043.9 | NP_004174.1 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Protein | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|---|
BEST1 | ENST00000378043.9 | c.-37+1G>T | splice_donor_variant | 1 | NM_004183.4 | ENSP00000367282 | P1 |
Frequencies
GnomAD3 genomes Cov.: 33
GnomAD3 genomes
Cov.:
33
GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0AN: 586Hom.: 0 Cov.: 0 AF XY: 0.00 AC XY: 0AN XY: 346
GnomAD4 exome
Data not reliable, filtered out with message: AC0
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586
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346
Gnomad4 AFR exome
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GnomAD4 genome Cov.: 33
GnomAD4 genome
Cov.:
33
ClinVar
Significance: Likely pathogenic
Submissions summary: Pathogenic:2
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
Autosomal recessive bestrophinopathy Pathogenic:1
Likely pathogenic, criteria provided, single submitter | clinical testing | Institute of Medical Molecular Genetics, University of Zurich | Jan 30, 2021 | - - |
Retinal dystrophy Pathogenic:1
Pathogenic, no assertion criteria provided | research | NIHR Bioresource Rare Diseases, University of Cambridge | Jan 01, 2015 | - - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
BayesDel_noAF
Benign
CADD
Pathogenic
DANN
Uncertain
Splicing
Name
Calibrated prediction
Score
Prediction
dbscSNV1_ADA
Pathogenic
dbscSNV1_RF
Pathogenic
SpliceAI score (max)
Details are displayed if max score is > 0.2
DS_DG_spliceai
Position offset: 10
DS_DL_spliceai
Position offset: -1
Find out detailed SpliceAI scores and Pangolin per-transcript scores at