Talk:CRISPR activation

Untitled

LuigiAG (talk) 02:53, 10 October 2017 (UTC)A good future addition to the components section in addition to the 3 I've put in already is for Expression Systems since dCas9 activation systems require a means of being expressed and introduced into their cells. It's an important piece of using them.

K.K.

Topic Peer Review 1

Dear Minshik, Kunal, and Naveen

It is very good that you chose to create a new wikipedia article instead of editing another.

For the introduction I think if you added more about the contents that will be shown throughout the wikipedia article it would want the author to continue to read the rest of the article. I would The definition of Crispr I think should also be more in depth on what it is and how its relation to dCas9 tool. I would also give a brief sentence about Cas9.

I think that the information for dCas9 is very well done as well as the Transcriptional Activators as there is a lot of good information in both of these sections, and is very interesting to read.

For the small guide RNA I think there needs to be a lot more information added. There could be more detail on how the sgRNAs are used to direct the Cas9 and dCas9.

For Applications and Future Directions I think it should go more in depth on how this technology will be able to help certain genetic mutations in the future. I would also bring up studies being done today with these tools.

Topic Peer Review 1

Dear Minshik, Kunal, and Naveen

dCas9 is a highly interesting topic, and I am glad you chose to make a Wikipedia entry on it. Finding a new choice to add to Wikipedia is very helpful.

One point of interest is that I would like to know a bit more about how dCas9 mutates from Cas9. I understand it is the result of point mutations, but where exactly do these point mutations occur and how potent must they be? Additionally, is there any other sort of mutation that can cause Cas9 to "die" and result in dCas9? Other than that, I thought you did a fantastic job comparing and contrasting dCas9 and Cas9.

A little bit more information on small guide RNA would be useful; I understand sgRNAs are used to direct Cas9 to its target, but the method by which it works is not delved into. I'm not sure if there is more information available on it, but if there is, having it in this article would be interesting.

The best part of this entry was by far your writing on transcriptional activators. Your group gave copious details on the importance of transcriptional activators, specific activation systems, and systems that amplify recruitment. The one critique I would have about that is the organization; I believe transcriptional activators should be its own heading and the specific examples should be included under this heading. That would help with the readability of the entry instead of having the two entities separated.

Finally, the applications portion could be a bit more fleshed out. The concept of genome wide screen in particular was very interesting; I would love to learn more about it and I believe that would be the main future use of dCas9.

So far, you guys have done an fantastic job. Just a few more details to ease understanding would make this excellent article even better.

Best of luck, Arjun Ponduri — Preceding unsigned comment added by Arjunponduri (talk • contribs) 22:46, 23 October 2017 (UTC)

Topic Peer Review 1

Dear Minshik, Kunal, and Naveen

• Dcas9 is associated with CRISPRi and it would be helpful to mention it and thereby linked to CRISPRi wiki page.
• A good figure for this wiki page would be a cartoon image of dcas9 role in both transcriptional repression and activation.
• Majority of your body is devoted to activation systems. It could be beneficial to mention some repression system such as the dCas9-Krab repressor system. This can broaden the versatility of dCas9 technology to readers.
• An interesting idea to discuss in applications for this technology is epigentic regulation . dCas9 is a versatile tool for epigenetic editing by fusing histone modifiers or dna methylation modifiers to the dCas9.

-Phu Phutruong (talk) 04:47, 24 October 2017 (UTC)

MLibrarian's Topic Review

Great idea for a new topic! And a nice Table of contents! And excellent job hyperlinking concepts!

Some suggestions:

1. The article would benefit from figures

2. Please hyperlink to their corresponding Wiki pages: CRISP, RNA, DNA, RNA Polymerase

Good job! MLibrarian (talk) 15:05, 27 October 2017 (UTC)

Nils' Comments

Nice job! Indeed, please create and add a couple of figures that illustrate in particular the function of the guideRNA in finding a binding site and how an activator domain is fused to dCas9 to induce activation. Explain in some more detail upfront how an enzyme (dCas9) that can by itself block transcription, can at the same time be used for activation (by inducing transcription initiation through the fused activator domain when binding to a different part of the DNA). Also, be mindful of the many other applications of the CRISPR-Cas systems and embed your articles with any other related articles.

Gillian's Comments

Nice work! I have a few points that you may want to consider: 1. I would add to your first paragraph and give a little bit more of an introduction. Also after you write guide RNA, include: "(gRNA)" to define it. 2. Please add some figures throughout 3. As some others have said, I would echo the same by saying that the applications area could use some work. You could fill your applications and introduction with work from some of the following groups, including for example: Dr. Jennifer Doudna's group (Cell 2013), Dr. Fang Zhang's group (Nature Biotech 2015), Dr. David Liu's group (Nature biotech 2014), or Dr. Rudolf Jaenisch group (Cell 2013).

Capitalization

I justed moved the page so the title is no longer restricted to dCas9, but there seem to be something wrong with the capital letter. I am not sure how to fix that... Antovigo (talk) 16:56, 25 October 2020 (UTC)