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Target intelligence / Profile preview
Transforming growth factor beta regulator 1 (TBRG1)
- Target
- TBRG1
- Molecular classification
- Nuclear protein, Intracellular signaling peptide/protein, Other (not a classical receptor, enzyme, transporter, ion channel, or transcription factor)
01
Overview
Transforming growth factor beta regulator 1 (TBRG1) is a nuclear growth-inhibitory protein with established tumor-suppressing activity in human cancers and key roles in cell cycle regulation. It can activate p53/TP53, induce G1 cell cycle arrest, and restrict cell proliferation in cooperation with CDKN2A, but its growth-inhibitory function does not require either p53 or CDKN2A. TBRG1 also contributes to chromosomal stability maintenance and can regulate innate immunity, as demonstrated in invertebrates. Currently, no drugs are known to directly target TBRG1 for therapeutic purposes.
- Other names
- Nuclear interactor of ARF and MDM2 (NIAM)FLJ14621TB-5NIAMNIAM, nuclear interactor of ARF and Mdm2nuclear interactor of ARF and MDM2transforming growth factor beta regulator 1
02
Mechanism of action
Not applicable—no known drugs targeting TBRG1 directly. Its biological mechanisms include activation of p53/TP53, induction of G1 cell cycle arrest, and cooperation with CDKN2A to restrict proliferation.
03
Biological functions
Cell cycle arrest (G1 phase)Growth inhibitionp53/TP53 activationRestriction of cell proliferationChromosomal stability maintenanceInnate immune response regulation (especially in invertebrates)
04
Disease associations
Cancer (tumor suppressor role—loss or dysregulation implicated in human cancers)Acromicric dysplasiaGeleophysic dysplasia 2Other roles in immune response, as described in invertebrate studies
05
Safety considerations
None documented for targeting TBRG1 directly; main therapeutic challenge is that loss of TBRG1 promotes tumorigenesis, highlighting its tumor suppressor functions
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