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Quaternary structure

Definition

noun

A structural level wherein several proteins (or polypeptide subunits) interact through non-covalent bonds to form one functional protein complex.


Supplement

In proteins, there are four recognized levels of protein structure: primary structure, secondary structure, tertiary structure, and quaternary structure.

A quaternary structure of a protein refers to the assembly of multiple folded protein molecules in a multi-subunit complex.


See also: protein structure


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Re: Protein structure

... also is correct. If it helps, I understand it as follows: 1 The primary structure gives no information on folding; it is order of the linked amino ... typically what one sees when one sees a ribbon structure picture. 4. (Quaternary) - many many proteins do not function without dimerisation, (trimerisation, ...

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by merv
Sun Oct 02, 2011 3:29 pm
 
Forum: Molecular Biology
Topic: Protein structure
Replies: 4
Views: 13499

Re: Protein structure

the definitions seem fine to me. The primary structure is like Asp-Gly-Glu-His-Gly-Phe blah, blah the secondary structure is ... with helix 3 and both are covered with beta-sheets 4-6) To my knowledge, the quaternary structure applies only for the multi-subunit proteins and shows, how ...

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by JackBean
Thu Sep 29, 2011 8:51 am
 
Forum: Molecular Biology
Topic: Protein structure
Replies: 4
Views: 13499

Protein structure

i dont understand the difference between primary,secondary, Tertiary and Quaternary so far this is what i understand by the following terms ok so far i know the primary structure is linear arrange of the amino acids in a peptide chain to show the sequence ...

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by ccBiologist
Thu Sep 29, 2011 8:15 am
 
Forum: Molecular Biology
Topic: Protein structure
Replies: 4
Views: 13499

confusion over protein tertiary structre (and enzymes)

chartsy: even if they have the tertiary structure, they still, of course, have also the secondary structure (some alpha-helices ... and the primary structure (AA sequence). By this logic, they can have both quaternary and tertiary structure. If that's what you didn't understand.

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by JackBean
Thu Apr 07, 2011 8:39 am
 
Forum: Molecular Biology
Topic: confusion over protein tertiary structre (and enzymes)
Replies: 2
Views: 2398

confusion over protein tertiary structre (and enzymes)

... composed of multiple chains, and the resulting assembly is dubbed the quaternary structure.

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by canalon
Wed Apr 06, 2011 9:17 pm
 
Forum: Molecular Biology
Topic: confusion over protein tertiary structre (and enzymes)
Replies: 2
Views: 2398
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