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Full-Text Articles in Medicine and Health Sciences
Regulation Of Cks1 Protein Turnover In Cancer Cells, Vinayak Khattar
Regulation Of Cks1 Protein Turnover In Cancer Cells, Vinayak Khattar
All ETDs from UAB
Cks1 is a crucial cell cycle regulator which plays pleiotropic roles in cancer cell growth and is highly expressed at both the protein, and mRNA levels, in cancer cells. In contrast, normal cells exhibit barely detectable levels of this protein, even though they express substantial Cks1 mRNA. One reason for high Cks1 protein in cancers appears to be its stabilization in these cells. Cks1 is known to be ubiquitinated and degraded by the proteasome. Coordinated ubiquitination dependent proteasomal degradation of cell cycle proteins is a major mechanism that regulates their activity. Therefore aberrant accumulation of Cks1, frequently observed in cancer, …
Usp16 And Histone H2a Deubiquitination In Mouse Embryonic Stem Cell Function, Wei Yang
Usp16 And Histone H2a Deubiquitination In Mouse Embryonic Stem Cell Function, Wei Yang
All ETDs from UAB
In eukaryotic cells, genomic DNA is packaged into a chromatin structure by association with histone and non-histone proteins. Posttranslational modifications of histones play important roles in the regulation of chromatin structure and function. Ubiquitination of histone H2A (ubH2A) represents a predominate modification, occurring on ~10% of total cellular H2A. While H2A ubiquitination is primarily conferred by Polycomb Repressive Complex 1 (PRC1), H2A deubiquitination has been attributed to multiple H2A deubiquitinases. Our laboratory previously reported the purification and functional characterization of a H2A-specific deubiquitinase, USP16 (initially named as Ubp-M) in human cells. However, whether USP16 represents a general and important regulator …