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Updated: Feb 22, 2026

Studying Cell Cycle-regulated Gene Expression by Two Complementary Cell Synchronization Protocols
Published on: June 6, 2017
Cell cycle-dependent regulation of cytoglobin by Skp2
Rince John1, Yama Atri1, Vaibhav Chand1
1Department of Biochemistry, University of Delhi South Campus, New Delhi, India.
Abstract:
Cytoglobin (Cygb) is a cellular haemoprotein belonging to the globin family with ambiguous biological functions. Downregulation of Cygb in many cancers is indicative of its tumour-suppressive role. This is the first report showing the cell cycle regulation of Cygb, which was found to peak at G1 and rapidly decline in S phase. Importantly, Skp2-mediated degradation of Cygb was identified as the key mechanism for controlling its oscillating levels during the cell cycle. Moreover, overexpression of Cygb stimulates hypophosphorylation of Rb causing delayed cell cycle progression. Overall, the study reveals a novel mechanism for the regulated expression of Cygb and also assigns a new role to Cygb in cell cycle control.
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