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Mendeliome v1.4496 TDP1 Zornitza Stark Publications for gene: TDP1 were set to 31182267; 12244316
Mendeliome v1.4493 TDP1 Zornitza Stark changed review comment from: Spinocerebellar ataxia with axonal neuropathy-1 (SCAN1) is an autosomal recessive neurologic disorder characterized by onset of gait disturbances in the first or second decades of life. Affected individuals have cerebellar ataxia associated with cerebellar atrophy on brain imaging, as well as an axonal sensorimotor neuropathy with distal sensory impairment, hypo- or areflexia, pes cavus, and steppage gait.

Three families reported, however all from Middle East and had same homozygous missense variant.; to: Spinocerebellar ataxia with axonal neuropathy-1 (SCAN1) is an autosomal recessive neurologic disorder characterized by onset of gait disturbances in the first or second decades of life. Affected individuals have cerebellar ataxia associated with cerebellar atrophy on brain imaging, as well as an axonal sensorimotor neuropathy with distal sensory impairment, hypo- or areflexia, pes cavus, and steppage gait.

Three families reported, however all from Middle East and had same homozygous missense variant p.H493R.
Mendeliome v1.4493 TDP1 Zornitza Stark edited their review of gene: TDP1: Added comment: Additional family reported in PMID 39576382 with different homozygous missense, c.1432C>T (p.His478Tyr). The affected individual had severe hypotonia, ataxia, distal axonal neuropathy, seizures at 9‑10 months, kyphoscoliosis, hearing/vision loss and moderate cognitive impairment. No other supportive data.; Changed publications: 31182267, 12244316, 39576382
Mendeliome v0.14667 TDP1 Elena Savva Marked gene: TDP1 as ready
Mendeliome v0.14667 TDP1 Elena Savva Gene: tdp1 has been classified as Amber List (Moderate Evidence).
Mendeliome v0.11973 TDP1 Zornitza Stark Tag founder tag was added to gene: TDP1.
Mendeliome v0.11973 TDP1 Zornitza Stark Phenotypes for gene: TDP1 were changed from to Spinocerebellar ataxia, autosomal recessive, with axonal neuropathy 1 , MIM# 607250
Mendeliome v0.11972 TDP1 Zornitza Stark Publications for gene: TDP1 were set to
Mendeliome v0.11971 TDP1 Zornitza Stark Mode of inheritance for gene: TDP1 was changed from Unknown to BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.11970 TDP1 Zornitza Stark Classified gene: TDP1 as Amber List (moderate evidence)
Mendeliome v0.11970 TDP1 Zornitza Stark Gene: tdp1 has been classified as Amber List (Moderate Evidence).
Mendeliome v0.11969 TDP1 Zornitza Stark reviewed gene: TDP1: Rating: AMBER; Mode of pathogenicity: None; Publications: 31182267, 12244316; Phenotypes: Spinocerebellar ataxia, autosomal recessive, with axonal neuropathy 1 , MIM# 607250; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.10295 CTDP1 Zornitza Stark Marked gene: CTDP1 as ready
Mendeliome v0.10295 CTDP1 Zornitza Stark Gene: ctdp1 has been classified as Green List (High Evidence).
Mendeliome v0.10295 CTDP1 Zornitza Stark Phenotypes for gene: CTDP1 were changed from to Congenital cataracts, facial dysmorphism, and neuropathy, MIM# 604168
Mendeliome v0.10294 CTDP1 Zornitza Stark Publications for gene: CTDP1 were set to
Mendeliome v0.10293 CTDP1 Zornitza Stark Mode of inheritance for gene: CTDP1 was changed from Unknown to BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.10292 CTDP1 Zornitza Stark Tag deep intronic tag was added to gene: CTDP1.
Tag founder tag was added to gene: CTDP1.
Mendeliome v0.10292 CTDP1 Zornitza Stark reviewed gene: CTDP1: Rating: GREEN; Mode of pathogenicity: None; Publications: 14517542, 24690360, 25529582; Phenotypes: Congenital cataracts, facial dysmorphism, and neuropathy, MIM# 604168; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.788 TDP2 Zornitza Stark gene: TDP2 was added
gene: TDP2 was added to Mendeliome_VCGS. Sources: Expert list
Mode of inheritance for gene: TDP2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: TDP2 were set to 31410782; 30109272; 24658003
Phenotypes for gene: TDP2 were set to Spinocerebellar ataxia, autosomal recessive 23; OMIM #616949
Review for gene: TDP2 was set to GREEN
Added comment: ID is part of the phenotype: 4 families with 6 affected patients, with functional evidence.

1 family with 3 affected sibs with homozygous splice site mutation in the TDP2 gene. Patient cell extracts showed absence of the full-length TDP2 protein and absence of 5-prime TDP activity, consistent with a loss of function, although 3-prime TDP activity, conferred by TDP1, was normal. In addition, patient lymphoblastoid cells were hypersensitive to the TOP2 poison etoposide. The findings indicated impaired capacity for double-strand break repair.

1 unrelated Egyptian patient with a similar disorder was homozygous for a truncating mutation in the TDP2 gene

1 unrelated Caucasian patient with same homozygous splice site mutation in the TDP2 gene. Western blot analysis did not detect TDP2 protein in patient primary skin fibroblasts. Patient fibroblasts showed an inability to rapidly repair topoisomerase-induced DNA double-strand breaks in the nucleus and also showed a profound hypersensitivity to this type of DNA damage. Complementation of patient cells with recombinant human TDP2 restored normal rates of nuclear DSB repair.
Sources: Expert list
Mendeliome v0.0 TDP1 Zornitza Stark gene: TDP1 was added
gene: TDP1 was added to Mendeliome_VCGS. Sources: Expert Review Green,Victorian Clinical Genetics Services
Mode of inheritance for gene: TDP1 was set to Unknown
Mendeliome v0.0 CTDP1 Zornitza Stark gene: CTDP1 was added
gene: CTDP1 was added to Mendeliome_VCGS. Sources: Expert Review Green,Victorian Clinical Genetics Services
Mode of inheritance for gene: CTDP1 was set to Unknown