Scientists have found that prion proteins can evolve in response to changes in their environment, despite the fact that they have no DNA

http://news.bbc.co.uk/2/hi/health/8435320.stm

Tags: evolution

Views: 23

Replies to This Discussion

I don't know enough about it, but the news report made it sound like a significant finding. Prions are not bacteria, by the way and they have no RNA.
Prions evolving are significant because they are, in essence, only malfunctioning proteins. But they reproduce by finding other proteins of the same gene and causing them to malfunction as well. That is all they do. By destroying one type of protein like that, you don't have it anymore and get sick (and die).

What is amazing is that if they are evolving and changing protein targets, we now have a mechanism that they can sustain themselves in populations for the long term and be a tree of "life" of their own. They aren't just malfunctioning proteins, they are disease vectors that change to continue to infect.
Yes, well, there are RNA-only bacteria

No, there aren't. Not unless there has been a HUGE breakthrough in biology in the last few years. I think you meant RNA-only viruses.
The function of DNA isn't really different, it functions as the genetic material in prokaryotes and eukaryotes. The packaging of the DNA is different, as are the evolutionary pressures due to population structures.
Another discussion was previously started over at the Origins group.
We are getting closer to solving the age old riddle, 'How did we get here?' Then we will be able to shame the creationists.
Please, the creationists were long ago shamed.
Somebody forgot to tell them that...
I think the defining characteristic of creationists is the inability to feel shame.
"getting closer"? We've already got it.

RSS

Support Atheist Nexus

Donate Today

Donate

 

Help Nexus When You Buy From Amazon

Amazon

AJY

 

Latest Activity

Freethinker 31 liked IAmTheBlog's blog post Indianapolis schools ban only selected religions, as well as atheist and LGBT sites, from students' Internet.
12 minutes ago
Freethinker 31 replied to Jeff Dempsey's discussion Atheist Advice For A Drug Addict or Alcoholic
25 minutes ago
Freethinker 31 liked Jeff Dempsey's discussion Atheist Advice For A Drug Addict or Alcoholic
32 minutes ago
Michael Penn commented on Donald R Barbera's blog post Skin Politics: Propaganda and Reality
38 minutes ago
Plinius commented on Ruth Anthony-Gardner's group Hang With Friends
48 minutes ago
Sentient Biped replied to Joe's discussion New Rule: Students Who Have a Same-Sex Wedding Can’t Be Mad When Their Christian Schools Expel Them For It in the group Atheist News
1 hour ago
Andrew Bradford Hoke commented on Andrew Bradford Hoke's blog post The Sociology of Religion
1 hour ago
Joseph P replied to Joe's discussion New Rule: Students Who Have a Same-Sex Wedding Can’t Be Mad When Their Christian Schools Expel Them For It in the group Atheist News
1 hour ago
Joe added a discussion to the group Atheist News
1 hour ago
Christine replied to Jeff Dempsey's discussion Atheist Advice For A Drug Addict or Alcoholic
2 hours ago
Christine replied to Luara's discussion religious magazine in doctors' office
2 hours ago
Luara commented on Donald R Barbera's blog post Skin Politics: Propaganda and Reality
2 hours ago

© 2014   Atheist Nexus. All rights reserved. Admin: Richard Haynes.

Badges  |  Report an Issue  |  Terms of Service