Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UNIPROT:P62988 (Ubiquitin)
 4,326 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

BAG-1 (Bcl-2-associated athanogene 1), a multifunctional anti-apoptotic protein known to interact with various cellular proteins, was isolated using its interaction with the anti-apoptotic protein, Bcl-2. A 97-amino acid segment that includes the ubiquitin homology (UBH) domain of mouse BAG-1 (mBAG-1) interacts with a peptide corresponding to the cytoplasmic tail (CT) domain of proHB-EGF. This protein-peptide interaction is likely to have functional significance, as the two species exhibit a synergistic cytoprotective effect. In this study, we determined the solution structure of mBAG-1-UBH and investigated its interaction with the proHB-EGF-CT peptide using isothermal titration calorimetry and NMR spectroscopy. The solution structure of mBAG-1-UBH was shown to be similar to the previously reported structure of hBAG-1-UBH (PDB code 1WXV). However, their electrostatic potential maps demonstrated some differences in the UBH motifs that may be important for protein-peptide interaction. An NMR titration experiment demonstrated that residues 23-26 and residues 89-94 of mBAG-1-UBH are important for its molecular interaction with the peptide proHB-EGF-CT. BAG-1-UBH shares some biological functions with ubiquitin including the formation of polyubiquitin chain and the proteasomal protein degradation. The unique cytoprotective activity suggests mBAG-1-UBH to be an interesting ubiquitin-like protein with distinct biological functions. Here, we first reported the solution structure of mBAG-1-UBH and the growth factor precursor-interacting motif on the protein. For detail understanding about the binding interface and the mechanism of interaction, the study on mBAG-1-UBH/proHB-EGF-CT complex structure is necessary.
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PMID:The NMR solution structure of the ubiquitin homology domain of Bcl-2-associated athanogene 1 (BAG-1-UBH) from Mus musculus. 2327 1

Ubiquitin-like containing plant homeodomain and RING finger domains 1 (UHRF1) is an anti-apoptotic protein involved in the silencing of several tumor suppressor genes (TSGs) through epigenetic modifications including DNA methylation and histone post-translational alterations, and also epigenetic-independent mechanisms. UHRF1 overexpression is observed in a number of solid tumors and hematological malignancies, and is considered a primary mechanism in inhibiting apoptosis. UHRF1 exerts its inhibitory activity on TSGs by binding to functional domains and therefore influences several epigenetic actors including DNA methyltransferase, histone deacetylase 1, histone acetyltransferase Tat-interacting protein 60 and histone methyltransferases G9a and Suv39H1. UHRF1 is considered to control a large macromolecular protein complex termed epigenetic code replication machinery, in order to maintain epigenetic silencing of TSGs during cell division, thus enabling cancer cells to escape apoptosis. MicroRNAs (miRNAs) are able to regulate the expression of its target gene by functioning as either an oncogene or a tumor suppressor. In the present review, the role of tumor suppressive miRNAs in the regulation of UHRF1, and the importance of targeting the microRNA/UHRF1 pathways in order to induce the reactivation of silenced TSGs and subsequent apoptosis are discussed.
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PMID:Targeting microRNA/UHRF1 pathways as a novel strategy for cancer therapy. 2928 83