rs104886251
Variant summary
Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PM1PM2PM5PP3_StrongPP5_Very_Strong
The ENST00000328300.11(COL4A5):c.3659G>A(p.Gly1220Asp) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G1220V) has been classified as Likely pathogenic.
Frequency
Consequence
ENST00000328300.11 missense
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/exons | MANE | Protein | UniProt |
---|---|---|---|---|---|---|---|---|
COL4A5 | NM_033380.3 | c.3659G>A | p.Gly1220Asp | missense_variant | 41/53 | ENST00000328300.11 | NP_203699.1 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Protein | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|---|
COL4A5 | ENST00000328300.11 | c.3659G>A | p.Gly1220Asp | missense_variant | 41/53 | 1 | NM_033380.3 | ENSP00000331902 | ||
COL4A5 | ENST00000361603.7 | c.3659G>A | p.Gly1220Asp | missense_variant | 41/51 | 2 | ENSP00000354505 | P1 |
Frequencies
GnomAD3 genomes Cov.: 22
GnomAD4 exome Cov.: 30
GnomAD4 genome Cov.: 22
ClinVar
Submissions by phenotype
X-linked Alport syndrome Pathogenic:3
Pathogenic, criteria provided, single submitter | clinical testing | INGEBI, INGEBI / CONICET | Jul 15, 2021 | Based on ACMG/AMP guidelines and Hearing Loss Expert Panel specific criteria: The c.3659 G>A (p.Gly1220Asp) in COL4A5 gene is absent from population databases, so PM2 applied. This variant impacts a glycine residue in the Gly-X-Y motifs of the collagene gene which are criticial for triple helical structure formation meeting PM1 rule. Computational evidence predicted a damage impact of the mutation to the protein (PP3; REVEL:0.98). G1220D variant has been found twice in Alport Syndromes's patients (PMID: 10094548 and this report), applying to PP4 and PS4_Sup. Considering the infromation: PM2, PM1, PP3, PP4 and Ps4_Sup the variant is classified as Pathogenic. - |
Pathogenic, criteria provided, single submitter | research | Precision Medicine Center, Zhengzhou University | - | PM1:Located in a mutational hot spot PM2:not found in gnomAD PM5: Novel missense change at an amino acid residue where a different missense change determined to be pathogenic has been seen before PP2:Missense variant in a gene that has a low rate of benign missense variation and in which missense variants are a common mechanism of disease PP3:Multiple lines of computational evidence support a deleterious effect on the gene or gene product - |
Likely pathogenic, criteria provided, single submitter | research | Molecular Biology Laboratory, Fundació Puigvert | Feb 01, 2020 | - - |
not provided Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | Labcorp Genetics (formerly Invitae), Labcorp | May 30, 2021 | For these reasons, this variant has been classified as Pathogenic. This variant disrupts the triple helix domain of COL4A5. Glycine residues within the Gly-Xaa-Yaa repeats of the triple helix domain are required for the structure and stability of fibrillar collagens (PMID: 7695699, 8218237, 19344236). In COL4A5, missense variants at these glycine residues are significantly enriched in individuals with disease (PMID: 23720012, 27627812) compared to the general population (ExAC). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt COL4A5 protein function. This variant has been observed in individual(s) with Alport syndrome (PMID: 22921432, 33532864, 10094548). ClinVar contains an entry for this variant (Variation ID: 24666). This variant is also known as c.3861G>A. This variant is not present in population databases (ExAC no frequency). This sequence change replaces glycine with aspartic acid at codon 1220 of the COL4A5 protein (p.Gly1220Asp). The glycine residue is highly conserved and there is a moderate physicochemical difference between glycine and aspartic acid. - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at