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Mendeliome v1.3070 TFCP2L1 Zornitza Stark gene: TFCP2L1 was added
gene: TFCP2L1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: TFCP2L1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: TFCP2L1 were set to 40569305; 33097957
Phenotypes for gene: TFCP2L1 were set to CAKUT, MONDO:0019719, TFGP2L1-related
Review for gene: TFCP2L1 was set to AMBER
Added comment: PMID 40569305: consanguineous preterm male infant with a clinical picture of advanced kidney dysfunction and severe renal salt-wasting, highly suggestive of prenatal onset Bartter syndrome. Patient's follow-up was characterized by severe polyuria; episodes of hyponatremia, hypokalemia, and hypochloremia; and metabolic alkalosis and hyperuricemia. Homozygous variant in the TFCP2L1 gene identified. TFCP2L1 is a transcription factor required for normal kidney development, that regulates acid-base and salt-water homeostasis.

PMID 33097957: infant who developed CKD by the age of 2 months and had episodes of severe hypochloraemic, hyponatraemic and hypokalaemic alkalosis, seizures, developmental delay and hypotonia together with cataracts. Homozygous LoF variant.

TFCP2L1 is localized throughout kidney development particularly in the distal nephron. TFCP2L1 induced the growth and development of renal tubules from rat mesenchymal cells. Conversely, the deletion of TFCP2L1 in mice was previously shown to lead to reduced expression of renal cell markers including ion transporters and cell identity proteins expressed in different segments of the distal nephron. TFCP2L1 localized to the nucleus in HEK293T cells only upon coexpression with its paralog upstream-binding protein 1 (UBP1). A TFCP2L1 mutant complementary DNA (cDNA) clone that represented the patient's mutation failed to form homo- and heterodimers with UBP1, an essential step for its transcriptional activity.
Sources: Literature
Mendeliome v1.973 ITFG2 Chirag Patel Classified gene: ITFG2 as Green List (high evidence)
Mendeliome v1.973 ITFG2 Chirag Patel Gene: itfg2 has been classified as Green List (High Evidence).
Mendeliome v1.972 ITFG2 Chirag Patel reviewed gene: ITFG2: Rating: GREEN; Mode of pathogenicity: None; Publications: ; Phenotypes: ; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal; Current diagnostic: yes
Mendeliome v0.6720 TFG Zornitza Stark Marked gene: TFG as ready
Mendeliome v0.6720 TFG Zornitza Stark Gene: tfg has been classified as Green List (High Evidence).
Mendeliome v0.6720 TFG Zornitza Stark Phenotypes for gene: TFG were changed from to Hereditary motor and sensory neuropathy, Okinawa type, MIM# 604484; Spastic paraplegia 57, autosomal recessive, MIM# 615658
Mendeliome v0.6719 TFG Zornitza Stark Mode of inheritance for gene: TFG was changed from Unknown to BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.6718 TFG Zornitza Stark reviewed gene: TFG: Rating: GREEN; Mode of pathogenicity: None; Publications: 30467354, 30157421, 28124177, 27601211, 27492651, 23479643, 25098539, 23553329, 22883144, 31449671, 31111683; Phenotypes: Hereditary motor and sensory neuropathy, Okinawa type, MIM# 604484, Spastic paraplegia 57, autosomal recessive, MIM# 615658; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.5331 ITFG2 Zornitza Stark Publications for gene: ITFG2 were set to 28397838; https://doi.org/10.1038/s41525-020-00150-z
Mendeliome v0.5330 ITFG2 Zornitza Stark edited their review of gene: ITFG2: Changed publications: 28397838, 33083013
Mendeliome v0.4875 ITFG2 Zornitza Stark Marked gene: ITFG2 as ready
Mendeliome v0.4875 ITFG2 Zornitza Stark Gene: itfg2 has been classified as Amber List (Moderate Evidence).
Mendeliome v0.4875 ITFG2 Zornitza Stark Classified gene: ITFG2 as Amber List (moderate evidence)
Mendeliome v0.4875 ITFG2 Zornitza Stark Gene: itfg2 has been classified as Amber List (Moderate Evidence).
Mendeliome v0.4874 ITFG2 Zornitza Stark gene: ITFG2 was added
gene: ITFG2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: ITFG2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: ITFG2 were set to 28397838; https://doi.org/10.1038/s41525-020-00150-z
Phenotypes for gene: ITFG2 were set to Neurodevelopmental abnormality; Intellectual disability; Developmental regression; Ataxia
Review for gene: ITFG2 was set to AMBER
Added comment: ITFG2 was suggested to be a candidate gene for autosomal recessive ID in the study by Harripaul et al (2018 - PMID: 28397838). The authors performed microarray and exome sequencing in 192 consanguineous families and identified a homozygous ITGF2 stopgain variant (NM_018463.3:c.472G>T / p.Glu158*) along with 3 additional variants segregating with ID within an investigated family (PK51). Cheema et al (2020 - https://doi.org/10.1038/s41525-020-00150-z) report briefly on a male, born to consanguineous parents presenting with NDD, seizures, regression and ataxia. There was a similarly affected female sibling. Evaluation of ROH revealed a homozygous ITFG2 nonsense variant [NM_018463.3:c.361C>T / p.(Gln121*)]. Families in this study were investigated by trio WES or WGS. Evaluation of data of the same lab revealed 3 additional unrelated subjects with overlapping phenotypes, notably NDD and ataxia. These individuals were - each - homozygous for pLoF variants [NM_018463.3:c.848-1G>A; NM_018463.3:c.704dupC, p.(Ala236fs), NM_018463.3:c.1000_1001delAT, p.(Ile334fs)]. As discussed in OMIM, ITFG2 encodes a subunit of the KICSTOR protein complex, having a role in regulating nutrient sensing by MTOR complex-1 (Wolfson et al 2017 - PMID : 28199306).

Rated Amber as Cheema et al report on diagnostic outcomes and multiple candidate genes as part of a heterogenous cohort and details are therefore limited.
Sources: Literature
Mendeliome v0.0 TFG Zornitza Stark gene: TFG was added
gene: TFG was added to Mendeliome_VCGS. Sources: Expert Review Green,Victorian Clinical Genetics Services
Mode of inheritance for gene: TFG was set to Unknown