Module 1 Dihedral angles Flashcards
1
Q
What is the omega angle
A
Between the alpha carbon of one residue and the other alpha carbon by the C–N bond
2
Q
What is the phi angle
A
Looking through N–C bond to compare between carbon on C=O to alpha carbon
3
Q
What is the psi angle
A
Looking through C–C bond to compare N from one residue to the other N in the other residue
4
Q
Why is psi and phi angle important
A
Folding of proteins and allow all conformational freedom in carbon backbone
5
Q
The values of omega for trans/cis
A
trans - 180
cis - 0
6
Q
Why is trans isomers favoured and by how much
A
Favoured energetically due to steric hindrance in cis form (trans 1000:1)
- Proline is a smaller ratio since both forms have similar steric hindrance
7
Q
How is the character of peptide bonds like
A
40% covalent bond character
