chr21-45405239-G-A
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Variant summary
Our verdict is Benign. Variant got -7 ACMG points: 0P and 7B. BP4_StrongBP6_ModerateBP7
The NM_001379500.1(COL18A1):c.9G>A(p.Pro3=) variant causes a splice region, synonymous change involving the alteration of a non-conserved nucleotide. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).
Frequency
Genomes: 𝑓 0.0 ( 0 hom., cov: 0)
Exomes 𝑓: 0.0 ( 0 hom. )
Failed GnomAD Quality Control
Consequence
COL18A1
NM_001379500.1 splice_region, synonymous
NM_001379500.1 splice_region, synonymous
Scores
2
Clinical Significance
Conservation
PhyloP100: -0.726
Genes affected
COL18A1 (HGNC:2195): (collagen type XVIII alpha 1 chain) This gene encodes the alpha chain of type XVIII collagen. This collagen is one of the multiplexins, extracellular matrix proteins that contain multiple triple-helix domains (collagenous domains) interrupted by non-collagenous domains. A long isoform of the protein has an N-terminal domain that is homologous to the extracellular part of frizzled receptors. Proteolytic processing at several endogenous cleavage sites in the C-terminal domain results in production of endostatin, a potent antiangiogenic protein that is able to inhibit angiogenesis and tumor growth. Mutations in this gene are associated with Knobloch syndrome. The main features of this syndrome involve retinal abnormalities, so type XVIII collagen may play an important role in retinal structure and in neural tube closure. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Dec 2014]
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ACMG classification
Classification made for transcript
Verdict is Benign. Variant got -7 ACMG points.
BP4
Computational evidence support a benign effect (BayesDel_noAF=-0.6).
BP6
Variant 21-45405239-G-A is Benign according to our data. Variant chr21-45405239-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 1529763.Status of the report is criteria_provided_single_submitter, 1 stars.
BP7
Synonymous conserved (PhyloP=-0.726 with no splicing effect.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
COL18A1 | NM_001379500.1 | c.9G>A | p.Pro3= | splice_region_variant, synonymous_variant | 1/42 | ENST00000651438.1 | |
BNAT1 | NR_183526.1 | n.197-743C>T | intron_variant, non_coding_transcript_variant | ||||
BNAT1 | NR_183527.1 | n.181+121C>T | intron_variant, non_coding_transcript_variant |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
COL18A1 | ENST00000651438.1 | c.9G>A | p.Pro3= | splice_region_variant, synonymous_variant | 1/42 | NM_001379500.1 |
Frequencies
GnomAD3 genomes AF: 0.00 AC: 0AN: 43324Hom.: 0 Cov.: 0 FAILED QC
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GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0AN: 89772Hom.: 0 Cov.: 3 AF XY: 0.00 AC XY: 0AN XY: 46742
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GnomAD4 genome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0AN: 43324Hom.: 0 Cov.: 0 AF XY: 0.00 AC XY: 0AN XY: 20934
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ClinVar
Significance: Likely benign
Submissions summary: Benign:1
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
not provided Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Labcorp Genetics (formerly Invitae), Labcorp | Aug 24, 2023 | - - |
Computational scores
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Prediction
BayesDel_noAF
Benign
CADD
Benign
DANN
Benign
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at
Publications
No publications associated with this variant yet.