Protein structures

7 important questions on Protein structures

What are the 4 requirements for a hydrogen bond?

1. H-bond donor (D): Nitrogen, oxygen
2. H-bond acceptor (A): Oxygen
3. Correct distance
4. Correct angle: 180 is a stronger H-bond

The direction of the helic is from the N-terminus to the C-terminus. But what is the direction of the dipole?

C-terminus to N-terminus

When do we speak of a B-sheet?

When 2 or more B-strands are interacting
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Which residues prefer to be in a strand?

VITWYF

Which residues prefer to be in a turn?

PGSND

What is a protein domain?

A group of residues with high contact density

Can a protein domain be active on it own when it is removed form the rest of the protein?

Yes

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