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Enzymes

  • 06-03-2013 10:01am
    #1
    okman
    Registered Users, Registered Users 2 Posts: 17 ✭


    Can someone please explain to me what the equatorial positions of an enzymes are.

    What does it mean if an enzyme is equatorially arranged!?

    Thanks
    Tagged:


Comments

  • #2
    Woodward
    Registered Users, Registered Users 2 Posts: 219 ✭✭Woodward


    Never heard of it. Are you sure they arent referring to the stereochemistry at a particular site?


  • #3
    okman
    Registered Users, Registered Users 2 Posts: 17 ✭okman


    ah well.. no in context... the paper is saying that the enzyme prefers equatorially arranged substrate ions? What might you make of this?


  • #4
    Woodward
    Registered Users, Registered Users 2 Posts: 219 ✭✭Woodward


    okman wrote: »
    ah well.. no in context... the paper is saying that the enzyme prefers equatorially arranged substrate ions? What might you make of this?

    It could mean many things. Is there a porphyrin ring or any other large planer region at the active site? It could mean it prefers approach from the sides rather than the top or bottom. It could also refer to the stereochemistry of the substrate for example glucose which has all OH groups equatorially arranged compared to mannose which has axial groups


  • #5
    SOL
    Registered Users, Registered Users 2 Posts: 1,155 ✭✭✭SOL


    Cyclohexane and other saturated 6 membered rings (such as sugars) adopt conformations such that the ring substituents are described as either axial or equatorial, so I guess they are describing the enzymes selectivity for a particular substrate with these characteristics.

    Any chance of a look at the paper? Just post up the DOI or citation and I can look it up...


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