Activity
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18 actions
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| Mendeliome v1.1992 | RFC4 |
Chirag Patel gene: RFC4 was added gene: RFC4 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: RFC4 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: RFC4 were set to PMID: 39106866 Phenotypes for gene: RFC4 were set to RFC4-related multisystem disorder Review for gene: RFC4 was set to GREEN gene: RFC4 was marked as current diagnostic Added comment: 9 affected individuals (aged birth to 47yrs) from 8 unrelated families with a multisystem disorder. Clinical features included: muscle weakness/myopathy (9/9), motor incoordination/gait disturbance (8/8), delayed gross motor development (6/9), dysarthria (5/5), peripheral neuropathy (3/3 adults), bilateral sensorineural hearing impairment (6/9), decreased body weight (8/9), short stature (5/9), microcephaly (4/9), respiratory issues/insufficiency (6/9), cerebellar atrophy (4/9), pituitary hypoplasia (3/9). WES or WGS identified biallelic loss-of-function variants in RFC4 (3 frameshift, 2 splice site, 1 single AA duplication, 2 single AA deletions, 2 missense), and almost all are likely to disrupt the C-terminal domain indispensable for Replication factor C (RFC) complex formation. All variants segregated with the disease. The RFC complex (with 5 subunits) is central to process of regulation of DNA replication, and it loads proliferating cell nuclear antigen onto DNA to facilitate the recruitment of replication and repair proteins and enhance DNA polymerase processivity. RFC1 is associated with CANVAS but the contributions of RFC2-5 subunits on human Mendelian disorders is unknown. Analysis of a previously determined cryo-EM structure of RFC bound to proliferating cell nuclear antigen suggested that the variants disrupt interactions within RFC4 and/or destabilize the RFC complex. Cellular studies using RFC4-deficient HeLa cells and primary fibroblasts demonstrated decreased RFC4 protein, compromised stability of the other RFC complex subunits, and perturbed RFC complex formation. Additionally, functional studies of the RFC4 variants affirmed diminished RFC complex formation, and cell cycle studies suggested perturbation of DNA replication and cell cycle progression. Sources: Literature |
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| Mendeliome v1.1692 | CANVAS_ACAGG | Bryony Thompson Classified STR: CANVAS_ACAGG as Green List (high evidence) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.1692 | CANVAS_ACAGG | Bryony Thompson Str: canvas_acagg has been classified as Green List (High Evidence). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.1691 | CANVAS_ACAGG | Bryony Thompson edited their review of STR: CANVAS_ACAGG: Added comment: Additional 4 unrelated cases homozygous for the (ACAGG)exp and one compound het with AAGGG/ACAGG expansion in a Japanese neuropathy cohort.; Changed rating: GREEN; Changed publications: 33103729, 36061987; Changed phenotypes: cerebellar ataxia with neuropathy and bilateral vestibular areflexia syndrome MONDO:0044720; Set clinically relevant: yes | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.1071 | CANVAS | Dean Phelan reviewed STR: CANVAS: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID: 37450567; Phenotypes: Cerebellar ataxia, neuropathy, and vestibular areflexia syndrome (MIM:614575); Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.5601 | CANVAS_ACAGG |
Bryony Thompson changed review comment from: A novel RFC1 repeat expansion motif, (ACAGG)exp, identified in three affected individuals from 2 families in an Asian-Pacific cohort for CANVAS. Southern blot was used to identify the repeat was ~1000kb in one of the cases, equivalent to ~1000 repeats. Sources: Literature; to: A novel RFC1 repeat expansion motif, (ACAGG)exp, identified homozygous in three affected individuals from 2 families in an Asian-Pacific cohort for CANVAS. Southern blot was used to identify the repeat was ~1000kb in one of the cases, equivalent to ~1000 repeats. Sources: Literature |
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| Mendeliome v0.5601 | CANVAS_ACAGG | Bryony Thompson Marked STR: CANVAS_ACAGG as ready | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.5601 | CANVAS_ACAGG | Bryony Thompson Str: canvas_acagg has been classified as Amber List (Moderate Evidence). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.5601 | CANVAS_ACAGG | Bryony Thompson Classified STR: CANVAS_ACAGG as Amber List (moderate evidence) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.5601 | CANVAS_ACAGG | Bryony Thompson Added comment: Comment on list classification: Used the pathogenic cut-off of 400 repeats from original CANVAS repeat | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.5601 | CANVAS_ACAGG | Bryony Thompson Str: canvas_acagg has been classified as Amber List (Moderate Evidence). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.5600 | CANVAS_ACAGG |
Bryony Thompson STR: CANVAS_ACAGG was added STR: CANVAS_ACAGG was added to Mendeliome. Sources: Literature Mode of inheritance for STR: CANVAS_ACAGG was set to BIALLELIC, autosomal or pseudoautosomal Publications for STR: CANVAS_ACAGG were set to 33103729 Phenotypes for STR: CANVAS_ACAGG were set to Cerebellar ataxia, neuropathy, and vestibular areflexia syndrome; fasciculations; elevated serum creatine kinase levels; denervation Review for STR: CANVAS_ACAGG was set to AMBER Added comment: A novel RFC1 repeat expansion motif, (ACAGG)exp, identified in three affected individuals from 2 families in an Asian-Pacific cohort for CANVAS. Southern blot was used to identify the repeat was ~1000kb in one of the cases, equivalent to ~1000 repeats. Sources: Literature |
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| Mendeliome v0.5599 | CANVAS | Bryony Thompson Marked STR: CANVAS as ready | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.5599 | CANVAS | Bryony Thompson Str: canvas has been classified as Green List (High Evidence). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.5599 | CANVAS | Bryony Thompson Classified STR: CANVAS as Green List (high evidence) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.5599 | CANVAS | Bryony Thompson Str: canvas has been classified as Green List (High Evidence). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.5598 | CANVAS |
Bryony Thompson STR: CANVAS was added STR: CANVAS was added to Mendeliome. Sources: Expert list Mode of inheritance for STR: CANVAS was set to BIALLELIC, autosomal or pseudoautosomal Publications for STR: CANVAS were set to 30926972; 32851396 Phenotypes for STR: CANVAS were set to Cerebellar ataxia, neuropathy, and vestibular areflexia syndrome MIM#614575 Review for STR: CANVAS was set to GREEN STR: CANVAS was marked as clinically relevant Added comment: Simple tandem repeat (AAAAG)11 replaced with (AAGGG)n in intron 2 of RFC1. Loss of function is not the mechanism of disease. Maori population-specific CANVAS configuration (AAAGG)10-25(AAGGG)exp. (AAAGG)n repeat alone is not pathogenic. Sources: Expert list |
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| Mendeliome v0.5552 | RFC1 | Teresa Zhao reviewed gene: RFC1: Rating: GREEN; Mode of pathogenicity: None; Publications: 33103729; Phenotypes: Cerebellar ataxia, neuropathy and vestibular areflexia syndrome (CANVAS); Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||