rs137853883
Variant summary
Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1PM2PP5_Very_Strong
The NM_021939.4(FKBP10):c.831delC(p.Gly278AlafsTer20) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000806 in 1,613,172 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Pathogenic (★★). Variant results in nonsense mediated mRNA decay.
Frequency
Consequence
NM_021939.4 frameshift
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Pathogenic. Variant got 18 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | MANE | Protein | UniProt |
---|---|---|---|---|---|---|---|---|
FKBP10 | NM_021939.4 | c.831delC | p.Gly278AlafsTer20 | frameshift_variant | Exon 5 of 10 | ENST00000321562.9 | NP_068758.3 | |
FKBP10 | XM_011525099.4 | c.831delC | p.Gly278AlafsTer20 | frameshift_variant | Exon 5 of 11 | XP_011523401.1 | ||
FKBP10 | XM_011525100.3 | c.558delC | p.Gly187AlafsTer20 | frameshift_variant | Exon 4 of 10 | XP_011523402.1 | ||
FKBP10 | XM_047436515.1 | c.558delC | p.Gly187AlafsTer20 | frameshift_variant | Exon 4 of 9 | XP_047292471.1 |
Ensembl
Frequencies
GnomAD3 genomes AF: 0.0000132 AC: 2AN: 151468Hom.: 0 Cov.: 31
GnomAD3 exomes AF: 0.00000400 AC: 1AN: 250308Hom.: 0 AF XY: 0.00 AC XY: 0AN XY: 135638
GnomAD4 exome AF: 0.00000753 AC: 11AN: 1461704Hom.: 0 Cov.: 32 AF XY: 0.00000688 AC XY: 5AN XY: 727140
GnomAD4 genome AF: 0.0000132 AC: 2AN: 151468Hom.: 0 Cov.: 31 AF XY: 0.0000135 AC XY: 1AN XY: 73918
ClinVar
Submissions by phenotype
not provided Pathogenic:2
This sequence change creates a premature translational stop signal (p.Gly278Alafs*20) in the FKBP10 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in FKBP10 are known to be pathogenic (PMID: 22689593, 22949511). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This premature translational stop signal has been observed in individual(s) with osteogenesis imperfecta (PMID: 28492130). ClinVar contains an entry for this variant (Variation ID: 503914). For these reasons, this variant has been classified as Pathogenic. -
The c.831delC variant in the FKBP10 gene has been previously reported in multiple individuals with osteogenesis imperfecta type 3 who carry a second FKBP10 pathogenic variant (Vorster et al., 2017). This deletion causes a frameshift starting with codon Glycine 278, changes this amino acid to an Alanine residue and creates a premature Stop codon at position 20 of the new reading frame, denoted p.Gly278AlafsX20. This variant is predicted to cause loss of normal protein function either through protein truncation or nonsense-mediated mRNA decay. Based on currently available evidence, we consider c.831delC to be pathogenic. -
Osteogenesis imperfecta type 11 Pathogenic:1
The FKBP10 c.831delC (p.Gly278AlafsTer20) variant results in a frameshift and is predicted to result in a premature truncation of the protein. The p.Gly278AlafsTer20 variant has been reported in a compound heterozygous state in eight individuals with osteogenesis imperfecta, including in three siblings and in at least three different families, and in a heterozygous state in one healthy parent of an affected individual (Vorster et al. 2017; Zhang et al. 2018; Chetty et al. 2019). In the seven individuals reported by Voster et al. (2017) and Chetty et al. (2019), all of whom were from southern Africa, the p.Gly278AlafsTer20 variant was identified in trans with another frameshift variant that occurs at the same nucleotide position, c.831dupC (p.Gly278ArgfsTer95), a pathogenic variant that Voster et al. (2017) suggest to be a founder variant in black southern African populations. In the remaining case, a male of Chinese heritage, the p.Gly278AlafsTer20 variant was found in trans with a different frameshift variant (Zhang et al. 2018). Control data are unavailable for this variant, which is reported at a frequency of 0.000081 in the African population of the Genome Aggregation Database. Chetty et al. (2019) indicate that the p.Gly278AlafsTer20 variant results in the loss of two peptidylprolyl isomerase domains and two EF-hand domains, which are important for appropriate protein localization. Based on the available evidence, the c.831delC (p.Gly278AlafsTer20) variant is classified as pathogenic for osteogenesis imperfecta with or without joint contractures. -
Bruck syndrome 1;C3151218:Osteogenesis imperfecta type 11 Pathogenic:1
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Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at