rs545993723
Variant summary
Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2PP3_Moderate
The NM_000093.5(COL5A1):c.4339-3C>G variant causes a splice region, splice polypyrimidine tract, intron 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. 2/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).
Frequency
Genomes: not found (cov: 32)
Consequence
COL5A1
NM_000093.5 splice_region, splice_polypyrimidine_tract, intron
NM_000093.5 splice_region, splice_polypyrimidine_tract, intron
Scores
2
Splicing: ADA: 0.9999
2
Clinical Significance
Conservation
PhyloP100: 2.63
Genes affected
COL5A1 (HGNC:2209): (collagen type V alpha 1 chain) This gene encodes an alpha chain for one of the low abundance fibrillar collagens. Fibrillar collagen molecules are trimers that can be composed of one or more types of alpha chains. Type V collagen is found in tissues containing type I collagen and appears to regulate the assembly of heterotypic fibers composed of both type I and type V collagen. This gene product is closely related to type XI collagen and it is possible that the collagen chains of types V and XI constitute a single collagen type with tissue-specific chain combinations. The encoded procollagen protein occurs commonly as the heterotrimer pro-alpha1(V)-pro-alpha1(V)-pro-alpha2(V). Mutations in this gene are associated with Ehlers-Danlos syndrome, types I and II. Alternative splicing of this gene results in multiple transcript variants. [provided by RefSeq, May 2013]
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ACMG classification
Classification made for transcript
Verdict is Uncertain_significance. Variant got 4 ACMG points.
PM2
?
Very rare variant in population databases, with high coverage;
PP3
?
Splicing scoreres supports a deletorius effect: Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF. Scorers claiming Uncertain: max_spliceai. No scorers claiming Benign.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
COL5A1 | NM_000093.5 | c.4339-3C>G | splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant | ENST00000371817.8 | |||
COL5A1 | NM_001278074.1 | c.4339-3C>G | splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant | ||||
COL5A1 | XM_017014266.3 | c.4339-3C>G | splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
COL5A1 | ENST00000371817.8 | c.4339-3C>G | splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant | 1 | NM_000093.5 | P4 | |||
COL5A1 | ENST00000371820.4 | c.4339-3C>G | splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant | 2 | A2 |
Frequencies
GnomAD3 genomes ? Cov.: 32
GnomAD3 genomes
?
Cov.:
32
GnomAD4 exome Cov.: 33
GnomAD4 exome
Cov.:
33
GnomAD4 genome ? Cov.: 32
GnomAD4 genome
?
Cov.:
32
ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:1
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
Ehlers-Danlos syndrome, classic type, 1 Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | May 04, 2020 | This variant has not been reported in the literature in individuals with COL5A1-related disease. This variant is not present in population databases (ExAC no frequency). This sequence change falls in intron 55 of the COL5A1 gene. It does not directly change the encoded amino acid sequence of the COL5A1 protein, but it affects a nucleotide within the consensus splice site of the intron. 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. Nucleotide substitutions within 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, but this prediction has not been confirmed by published transcriptional studies. - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
BayesDel_noAF
Benign
Cadd
Benign
Dann
Benign
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_AG_spliceai
Position offset: 13
Find out detailed SpliceAI scores and Pangolin per-transcript scores at