Возможно ли, что именно вирусы сформировали животных и растения, принося и соединяя в клетках различные гены?
Viruses - who are they? Dispassionate killers who don't choos their victims, killing everyone they can?
- Thread starter ольга
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Pinball1970
Valued Senior Member
I have read that. I think that is dangerous myself but what do I know?
Pinball1970
Valued Senior Member
Yes if you see the diagram from the Koonin paper.
Pinball1970
Valued Senior Member
This from 2021
Endogenous retroviruses in the origins and treatment of cancer - Genome Biology
Endogenous retroviruses (ERVs) are emerging as promising therapeutic targets in cancer. As remnants of ancient retroviral infections, ERV-derived regulatory elements coordinate expression from gene networks, including those underpinning embryogenesis and immune cell function. ERV activation can...
genomebiology.biomedcentral.com
Пин, а Вы знали, что при определённых условиях, например, в открытом космосе, вирусы кристаллизуются в форме призмы? Т.е. вирус может стать кристаллом, и наоборот.This from 2021
Endogenous retroviruses in the origins and treatment of cancer - Genome Biology
Endogenous retroviruses (ERVs) are emerging as promising therapeutic targets in cancer. As remnants of ancient retroviral infections, ERV-derived regulatory elements coordinate expression from gene networks, including those underpinning embryogenesis and immune cell function. ERV activation can...
Pinball1970
Valued Senior Member
I'm not aware of that.
exchemist
Valued Senior Member
According to the paper I linked earlier in the thread, the suggestion is made that viruses may have "invented" DNA!
This would have been by an early "reverse" transcription mechanism, from RNA viruses, in the hypothesised RNA world. So what we call the reverse process may actually have been the "forward"process, initially.
There certainly seem to be reasons for thinking that viruses played a key role in the evolution of early life.
(I'm ploughing my way through the paper. If I come across any more dramatic claims for the role of viruses I will post them.)
This would have been by an early "reverse" transcription mechanism, from RNA viruses, in the hypothesised RNA world. So what we call the reverse process may actually have been the "forward"process, initially.
There certainly seem to be reasons for thinking that viruses played a key role in the evolution of early life.
(I'm ploughing my way through the paper. If I come across any more dramatic claims for the role of viruses I will post them.)
I've read that viruses crystallize under unfavorable conditions. So viruses can be both living and inanimate objects?According to the paper I linked earlier in the thread, the suggestion is made that viruses may have "invented" DNA!
This would have been by an early "reverse" transcription mechanism, from RNA viruses, in the hypothesised RNA world. So what we call the reverse process may actually have been the "forward"process, initially.
There certainly seem to be reasons for thinking that viruses played a key role in the evolution of early life.
(I'm ploughing my way through the paper. If I come across any more dramatic claims for the role of viruses I will post them.)
exchemist
Valued Senior Member
It is notoriously difficult to arrive at any definition of "life" that includes everything we intuitively regard as alive and excludes everything we would not. Viruses need a host to reproduce and they do not have a metabolism, so they might generally be said not to be alive. Yet, as the paper I linked shows, they are a critical part of the web of life on this planet.
Science often shows us we cannot always force-fit nature into the categories we are comfortable with. As a chemist by training I am very much aware of this, relying, as one does in chemistry, on concepts from quantum theory all the time.
Viruses have a protein shell called a capsid, which generally has a geometrical shape, often iscohedral or spiral. They are also often small enough for van der Waals' forces to provide a significant force of attraction between them. Those two features, between them, would account for why they can clump together in a geometrical array - which is a crystal.
Write4U
Valued Senior Member
Interestig tidbit.
Bacteriophages are viruses that kill bacteria. It's turtles all the way down. Moreover, viruses do employ quorum sensing to communicate.
Note the body of the phage. Phages have DNA and undergo mitosis
Viruses can respond to quorum sensing and other bacterial chemical signals, according to research by Bonnie Bassler and her team12.
Bacteriophages are viruses that kill bacteria. It's turtles all the way down. Moreover, viruses do employ quorum sensing to communicate.
Note the body of the phage. Phages have DNA and undergo mitosisViruses can respond to quorum sensing and other bacterial chemical signals, according to research by Bonnie Bassler and her team12.
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Учёные сейчас всё более склоняются к мнению о том, что онкологические заболевания вызываются вирусами. Они могут нарушать и изменять ДНК. Вирусов в организме больше, чем клеточной ткани. Я сейчас разные статьи про них читаю. Много интересного узнаю.