Youtor
Cyclin and CDK
>> YOUR LINK HERE: ___ http://youtube.com/watch?v=amZ9VqMpoK4
This cell cycle regulation lecture explains about role of cyclin and cdks in cell cycle control. http://shomusbiology.com/ • Download the study materials here- • http://shomusbiology.com/bio-material... • Remember Shomu’s Biology is created to spread the knowledge of life science and biology by sharing all this free biology lectures video and animation presented by Suman Bhattacharjee in YouTube. All these tutorials are brought to you for free. Please subscribe to our channel so that we can grow together. You can check for any of the following services from Shomu’s Biology- • Buy Shomu’s Biology lecture DVD set- www.shomusbiology.com/dvd-store • Shomu’s Biology assignment services – www.shomusbiology.com/assignment -help • Join Online coaching for CSIR NET exam – www.shomusbiology.com/net-coaching • We are social. Find us on different sites here- • Our Website – www.shomusbiology.com • Facebook page- / shomusbiology • Twitter - / shomusbiology • SlideShare- www.slideshare.net/shomusbiology • Google plus- https://plus.google.com/1136485849827... • LinkedIn - / suman-bhattacharjee-2a051661 • Youtube- / thefunsuman • Thank you for watching • Cyclins were originally named because their concentration varies in a cyclical fashion during the cell cycle. (Note that the cyclins are now classified according to their conserved cyclin box structure, and not all these cyclins alter in level through the cell cycle.[2]) The oscillations of the cyclins, namely fluctuations in cyclin gene expression and destruction by the ubiquitin mediated proteasome pathway, induce oscillations in Cdk activity to drive the cell cycle. A cyclin forms a complex with Cdk, which begins to activate the Cdk, but the complete activation requires phosphorylation, as well. Complex formation results in activation of the Cdk active site. Cyclins themselves have no enzymatic activity but have binding sites for some substrates and target the Cdks to specific subcellular locations.[3] • They were discovered by R. Timothy Hunt in 1982 while studying the cell cycle of sea urchins.[4][5] • In an interview for the BBC4 documentary The Life Scientific (aired on 13/12/2011) hosted by Jim Al-Khalili, R. Timothy Hunt explained that the name cyclin was originally named after his hobby cycling. It was only after the naming did its importance in the cell cycle become apparent. As it was appropriate the name stuck.[6] R.Timothy Hunt: By the way the name cyclin, which I coined, was really a joke, it's because I like cycling so much at the time but they did come and go in the cell... [7] • Cyclins, when bound with the dependent kinases, such as the p34 (cdc2) or cdk1 proteins, form the maturation-promoting factor. MPFs activate other proteins through phosphorylation. These phosphorylated proteins, in turn, are responsible for specific events during cycle division such as microtubule formation and chromatin remodeling. Cyclins can be divided into four classes based on their behavior in the cell cycle of vertebrate somatic cells and yeast cells: G1/S cyclins, S cyclins, M cyclins, G1 cyclins. This division is useful when talking about most cell cycles, but it is not universal as some cyclins have different functions or timing in different cell types. Source of the article published in description is Wikipedia. I am sharing their material. © by original content developers of Wikipedia. • Link- http://en.wikipedia.org/wiki/Main_Page
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