ATAR Notes: Forum
VCE Stuff => VCE Science => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Chemistry => Topic started by: kate26 on June 04, 2010, 08:26:31 pm
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so i came across a question asking about what variable group within a protein would be likely to rely on dispersion forces to be attracted to neighbouring sections and i was kinda like whaaaa?
so i was hoping someone would be able to help out with what causes the different bonding within the tertiary structure of protein.
any help will be greatly appreciated
cheers
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Usually its the interactions of the Z group with other Z groups.
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yeaaah i know that :) i was kinda hoping to find out what atoms exactly were involved ... ?
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Disulfide == S
Polar bonds == O-H or COOH
Dispersion == CH3, CH2
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righteo :) thanks
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Well the R group can have basically anything on it. And it is the interaction on these side groups which constitutes the tertiary structure of a protein.
Something which will only have dispersion will be non-polar; I'd say a methyl group.
Another kind of bonding is covalent; this can be di-sulfide, for example, where two S-H groups combine to form an S-S link. There are probably other kinds of covalent bonding possible between side chains, but this is the only example I can think of presently.
There's also Hydrogen bonding. Which could be between carbonyl groups(C=O) and hydroxyl groups(O-H) or Amine groups(N-H2)
Finally(I think) there can be ionic interaction. This happens between a negatively charged species and a positively charged one. A possible combination could be the deprotonated carboxyl group(COO-) and the cationic amine group(NH3+).
I think that is basically it.
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thanks that really clears it up :)