Biology-Online • View topic - confusion over protein tertiary structre (and enzymes)

Join for Free!
122503 members

confusion over protein tertiary structre (and enzymes)

Discussion of all aspects of biological molecules, biochemical processes and laboratory procedures in the field.

Moderator: BioTeam

confusion over protein tertiary structre (and enzymes)

Postby chartsy » Wed Apr 06, 2011 7:18 pm

Hey, i'm a bit confused, let me explain:
according to my biology notes my teacher give me, the tertiary structure is the final structure for proteins with only one polypeptide chain. Nextly, they state that globular proteins(in particular enzymes) have a tertiary structure, i thought this meant that globular proteins only have one polypeptide chain, but later the notes say how globular proteins such has haem contain 4 polypeptide chains, given that this is more than one should they not hav a quaternary structure?
Posts: 1
Joined: Wed Apr 06, 2011 7:09 pm

Postby canalon » Wed Apr 06, 2011 9:17 pm

Your guess is correct, there are (many) proteins composed of multiple chains, and the resulting assembly is dubbed the quaternary structure.

Science has proof without any certainty. Creationists have certainty without
any proof. (Ashley Montague)
User avatar
Inland Taipan
Inland Taipan
Posts: 3909
Joined: Thu Feb 03, 2005 2:46 pm
Location: Canada

Postby JackBean » Thu Apr 07, 2011 8:39 am

chartsy: even if they have the tertiary structure, they still, of course, have also the secondary structure (some alpha-helices and beta-sheets) 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.

Cis or trans? That's what matters.
User avatar
Inland Taipan
Inland Taipan
Posts: 5694
Joined: Mon Sep 14, 2009 7:12 pm

Return to Molecular Biology

Who is online

Users browsing this forum: No registered users and 2 guests