Notices
Results 1 to 7 of 7

Thread: Protein synthesis

  1. #1 Protein synthesis 
    Forum Sophomore Dkav's Avatar
    Join Date
    Dec 2010
    Posts
    183
    How do cell's know when it is time to make a specific protein or enzyme?


    Reply With Quote  
     

  2.  
     

  3. #2  
    Forum Cosmic Wizard i_feel_tiredsleepy's Avatar
    Join Date
    Mar 2008
    Location
    Montreal
    Posts
    2,256
    Well it's a really big question. The structure of DNA and RNA plays a big role, as do a number of other proteins, substrates, and hormones.

    Then there are a lot of ways transcription can be regulated.

    http://en.wikipedia.org/wiki/Transcriptional_regulation

    You could read up on this stuff for hours.


    "I almost went to bed
    without remembering
    the four white violets
    I put in the button-hole
    of your green sweater

    and how i kissed you then
    and you kissed me
    shy as though I'd
    never been your lover "
    - Leonard Cohen
    Reply With Quote  
     

  4. #3  
    Forum Sophomore Dkav's Avatar
    Join Date
    Dec 2010
    Posts
    183
    "A repressor is a DNA-binding protein that regulates the expression of one or more genes by binding to the operator and blocking the attachment of RNA polymerase to the promoter, thus preventing transcription of the genes. This blocking of expression is called repression."

    What influences the repressor to bind to the operator?
    The need for an intelligible world begins with the fearfulness of pre-philosophical, pre-literate societies facing an unpredictable world of change and trying to make sense of it.
    Reply With Quote  
     

  5. #4  
    Forum Cosmic Wizard i_feel_tiredsleepy's Avatar
    Join Date
    Mar 2008
    Location
    Montreal
    Posts
    2,256
    Usually its structure makes it bind certain sequences of DNA preferentially. An inducer will often cause a structural change in the repressor that makes it dissociate from DNA.

    Helix-turn-helix motifs are the one I can think of off the top of my head. It's been like 5 years since I took a biochemistry course on nucleic acids and my memory is getting foggy.
    http://en.wikipedia.org/wiki/Helix-turn-helix
    "I almost went to bed
    without remembering
    the four white violets
    I put in the button-hole
    of your green sweater

    and how i kissed you then
    and you kissed me
    shy as though I'd
    never been your lover "
    - Leonard Cohen
    Reply With Quote  
     

  6. #5  
    Forum Sophomore Dkav's Avatar
    Join Date
    Dec 2010
    Posts
    183
    Thanks. I am in biochem right now and it just seems like the more I know, the less I know.
    Reply With Quote  
     

  7. #6  
    New Member
    Join Date
    Mar 2011
    Posts
    2
    The process of building proteins is called Protein synthesis,sometimes used to refer alone to protein translation but divers frequently it refers to a multi-step process, which start with amino acid synthesis and imitation of nuclear DNA into messenger RNA, which is then used as input to translation.
    Reply With Quote  
     

  8. #7  
    New Member
    Join Date
    Apr 2011
    Posts
    2
    thanx

    nice discussion
    Reply With Quote  
     

Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •