Unusual cell division- Identifying mutant protein and genes
February 18, 2011 at 9:27 pm #14532Bex23Participant
I have a hypothetical situation where a mutation has arisen in a mammalian cell culture causing the production of giant multinucleate cells. It seems most likely that the problem is a result of a mutation in the cytoskeleton but since a number of proteins could have caused this mutation how do I narrow it down? And once you have identified what protein has been mutated how would you identify the gene?
The second part of the hypothetical situation is that once the mutant line has been isolated after a period of time mononucleate cells begin to appears. I’ve been racking my brain but I can’t think of a possible explanation, can anyone help?!
February 19, 2011 at 3:07 pm #103554
Let’s try and discuss this problem. I find this interesting, but ain’t no expert.
I’ll tell you what I know. The only instance of multinucleate cells I can think of are fusion cells – which were used to study the cell cycle. Which also reminds me that it is possible the multi nuclei cells might just as well be a reuslt of improper cell division – that is, the cells replicate their DNA, divide the nucleus and get ready for the final phase and divide into two separate daughter cells.
So my thoughts were : it was a result of the final phase of cell division going wrong. I looked up Cell division on wikipedia and I got the following. (See quote, and highlights)
This leads me to think the proteins that were mutated were involved with Cytokinesis. It also mentions the role of golgi apparatus in the cell, which makes me think that those would be invovled. Go through it, tell me what you think and we’ll proceed.quote :
February 19, 2011 at 3:09 pm #103555
I guess you didn’t want more possibilities but a way to narrow things down. I’m clueless, but I got a feeling for narrowing down – you need more data about the situation. Either that, or documented information about the things that you already know!
I’m saying this because you mentioned cytoskeleton and the wiki article also mentions microtubules in Cytokinesis, which makes me think you kind of made it already!
February 19, 2011 at 3:59 pm #103558Bex23Participant
Yeah, I was thinking of cytokinesis as well although I didn’t realise the golgi apparatus was involved so thanks for that info.
I was thinking of using some kind of microscopy to visualise the mitotic phase so I could see exactly where the cell was arresting. As since cytokinesis consists of more than one stage it would help narrow down the possible protein or proteins that have been affected. Can you think of any other possible test I could do to narrow down the mutated protein/proteins?
Also, aside from sequencing the whole cell genome and comparing it to a normal cell I’m not sure how I would specifically find the protein and subsequently the gene that is involved.
February 23, 2011 at 6:29 pm #103617
Hey sorry, forgot about this post altogether! Will get back to this. In the meanwhile, please give me a reply if it worked!
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