Are disulfide bonds only tertiary or also primary?

[510586]

---

Members don't see this ad.

Are disulfide bonds primary and tertiary or only tertiary? Just came across a problem in my DAT studying saying it was primary as well

 

[virtualmaster999]

Are disulfide bonds primary and tertiary or only tertiary? Just came across a problem in my DAT studying saying it was primary as well

From what I've learned, it's tertiary and quaternary. I believe the interactions in tert. apply to quaternary. Someone correct me if I'm wrong, but I'm pretty sure that's how I remember it in detail from biochem.

 

[510586]

From what I've learned, it's tertiary and quaternary. I believe the interactions in tert. apply to quaternary. Someone correct me if I'm wrong, but I'm pretty sure that's how I remember it in detail from biochem.

Organic Odyssey states that it is primary as well. I always thought it was tertiary before thid

 

[virtualmaster999]

Organic Odyssey states that it is primary as well. I always thought it was tertiary before thid

It cant be primary though, because primary is the sequence of amino acids held by covalent bonds.

 

[DAT Destroyer]

Are disulfide bonds primary and tertiary or only tertiary? Just came across a problem in my DAT studying saying it was primary as well

Disulfide bonds can exist in primary, tertiary and quaternary structures.

 

[510586]

Disulfide bonds can exist in primary, tertiary and quaternary structures.

Do they exist as side chains or something?

 

[dental deezle]

Disulfide bonds can exist in primary, tertiary and quaternary structures.

I'm really confused, I took bio chemistry and that was never taught to us. I thought the primary structure was simply a chain of amino acids how can there be a covalent bond involved with sulfur groups if the chain is by the N group and the O group of each A.A?

 

[DAT Destroyer]

Do they exist as side chains or something?

Yes. Side chains are in Amino acids, that is not a primary structure.
Disulfide bonds can stabilize to peptide chains.

 

[ywcywc]

For protein, disulfide bonds primarily contribute to tertiary structure. Definitely it is not in primary structure, the polypeptide chain.

 

[DAT Destroyer]

I'm really confused, I took bio chemistry and that was never taught to us. I thought the primary structure was simply a chain of amino acids how can there be a covalent bond involved with sulfur groups if the chain is by the N group and the O group of each A.A?

Primary structure is mostly just a sequencr of amino acids, not only the sequence of amino acids. Disulfide bonds, are covalent bonds, that can hold 2 peptide chains together before secondary or tertiary structure forms. That is how they can be seen in primary structure.

 

[DAT Destroyer]

Are disulfide bonds primary and tertiary or only tertiary? Just came across a problem in my DAT studying saying it was primary as well

More information on why Disulfide bonds are also part of primary structure.

http://academic.brooklyn.cuny.edu/biology/bio4fv/page/disulfi.htm

 

[Premed411.com]

I'm really confused, I took bio chemistry and that was never taught to us. I thought the primary structure was simply a chain of amino acids how can there be a covalent bond involved with sulfur groups if the chain is by the N group and the O group of each A.A?

It is more accurate to describe primary structure as the covalent bonds which link amino acids. This includes disulfide and peptide bonds, so disulfide bonds are part of primary structure, but since they also are responsible for non-local folding, they are part of tertiary structure as well.