rs1555574638
Positions:
Variant summary
Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PVS1PM2PP5_Moderate
The NM_000088.4(COL1A1):c.678del(p.Gly227GlufsTer38) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (★). Variant results in nonsense mediated mRNA decay.
Frequency
Genomes: not found (cov: 32)
Consequence
COL1A1
NM_000088.4 frameshift
NM_000088.4 frameshift
Scores
Not classified
Clinical Significance
Conservation
PhyloP100: 1.60
Genes affected
COL1A1 (HGNC:2197): (collagen type I alpha 1 chain) This gene encodes the pro-alpha1 chains of type I collagen whose triple helix comprises two alpha1 chains and one alpha2 chain. Type I is a fibril-forming collagen found in most connective tissues and is abundant in bone, cornea, dermis and tendon. Mutations in this gene are associated with osteogenesis imperfecta types I-IV, Ehlers-Danlos syndrome type VIIA, Ehlers-Danlos syndrome Classical type, Caffey Disease and idiopathic osteoporosis. Reciprocal translocations between chromosomes 17 and 22, where this gene and the gene for platelet-derived growth factor beta are located, are associated with a particular type of skin tumor called dermatofibrosarcoma protuberans, resulting from unregulated expression of the growth factor. Two transcripts, resulting from the use of alternate polyadenylation signals, have been identified for this gene. [provided by R. Dalgleish, Feb 2008]
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ACMG classification
Classification made for transcript
Verdict is Pathogenic. Variant got 12 ACMG points.
PVS1
?
Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
PM2
?
Very rare variant in population databases, with high coverage;
PP5
?
Variant 17-50197749-CA-C is Pathogenic according to our data. Variant chr17-50197749-CA-C is described in ClinVar as [Pathogenic]. Clinvar id is 456793.Status of the report is criteria_provided_single_submitter, 1 stars.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
COL1A1 | NM_000088.4 | c.678del | p.Gly227GlufsTer38 | frameshift_variant | 9/51 | ENST00000225964.10 | |
COL1A1 | XM_011524341.2 | c.678del | p.Gly227GlufsTer38 | frameshift_variant | 9/48 | ||
COL1A1 | XM_005257058.5 | c.678del | p.Gly227GlufsTer38 | frameshift_variant | 9/49 | ||
COL1A1 | XM_005257059.5 | c.678del | p.Gly227GlufsTer38 | frameshift_variant | 9/38 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
COL1A1 | ENST00000225964.10 | c.678del | p.Gly227GlufsTer38 | frameshift_variant | 9/51 | 1 | NM_000088.4 | P1 | |
COL1A1 | ENST00000495677.1 | n.405del | non_coding_transcript_exon_variant | 4/8 | 3 |
Frequencies
GnomAD3 genomes ? Cov.: 32
GnomAD3 genomes
?
Cov.:
32
GnomAD4 exome Cov.: 32
GnomAD4 exome
Cov.:
32
GnomAD4 genome ? Cov.: 32
GnomAD4 genome
?
Cov.:
32
ClinVar
Significance: Pathogenic
Submissions summary: Pathogenic:1
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
Osteogenesis imperfecta type I Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | Invitae | Sep 20, 2021 | For these reasons, this variant has been classified as Pathogenic. While this particular variant has not been reported in the literature, loss-of-function variants in COL1A1 are known to be pathogenic (PMID: 9443882, 9295084, 7942841). This sequence change deletes 1 nucleotide from exon 9 of the COL1A1 mRNA (c.678delT), causing a frameshift at codon 227. This creates a premature translational stop signal (p.Gly227Glufs*38) and is expected to result in an absent or disrupted protein product. - |
Computational scores
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Calibrated prediction
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Prediction
Splicing
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Calibrated prediction
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SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at