Open AccessLoss of cks1 homeostasis deregulates cell division cycle
Author(s) -
Krishnan Anand,
Nair S. Asha,
Pillai M. Radhakrishna
Publication year - 2010
Publication title -
journal of cellular and molecular medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.44
H-Index - 130
eISSN - 1582-4934
pISSN - 1582-1838
DOI - 10.1111/j.1582-4934.2009.00698.x
Subject(s) - biology , cell cycle , proteasome , regulator , microbiology and biotechnology , ubiquitin , cell division , skp2 , cyclin dependent kinase , cyclin , cell cycle protein , ubiquitin ligase , computational biology , cell , genetics , gene
• Introduction • Functional analyses of cks1 • cks1 linking the unlinked • cks1 acts as a transcriptional regulator • cks1 turnover • Human cks1 ‐ Structural basis for docking functions ‐ Targeting function of skp2‐p27 interaction ‐ Other targets of human cks1 ‐ Mitotic functions of human cks1 ‐ Human cks1 and cancer• Future directionsGenetic and biochemical studies have provided considerable insight into the multiple functions of cyclin‐dependent kinase subunit (cks)1 in cell division cycle. In addition to enhanced substrate targeting by specific ubiquitin ligases SCF skp2 and APC/C, its direct interaction with proteasome components normalizes multiple cell cycle regulators. Importantly, it also acts as a transcriptional regulator. cks1 overexpression reflects poor prognosis in malignancy thus indicating its possible role in tumour diagnosis and management. The present review compiles the multiple functional roles of cks1 in cell division with specific emphasis on its molecular mechanisms. Its docking functions and the possible downstream proteolytic and transcriptional targets are described. The spatial configuration of cks1–cdk2 complex and the structural organization of cks1–p27–skp2 assembly required for p27 ubiquitination are discussed in detail. In addition to enhanced p27 degradation, the possible other mechanisms which underlie its pathological functions in human cancer progression are also discussed. Though there are apparent gaps in information, the turnover mechanism of cks1 is well addressed and presents opportunity to exploit the target for disease management.