The carbon-nitrogen peptide bond is rigid, but rotation can take place about the N-Ca and the Ca-C bonds in a protein (Ca is the a carbon atom). These bond angles define the conformation of the peptide chain. Consider the Ramachandran plot to answer both questions. Which dihedral angles and residues would not likely occur in a ß sheet? 180 120 60 -60 -120 -180 -180 180 o (degrees) O=-51°; Q=+153°; many Gly and Pro residues OA. O B. D=+60°; Y=+60°; many Gly residues OC. ®=-57"; y-49°; many Ala residues OD. D=-139°; =+135°; many Val residues O=-120°; y-+120°; many Tyr residues (səəBəp)
The carbon-nitrogen peptide bond is rigid, but rotation can take place about the N-Ca and the Ca-C bonds in a protein (Ca is the a carbon atom). These bond angles define the conformation of the peptide chain. Consider the Ramachandran plot to answer both questions. Which dihedral angles and residues would not likely occur in a ß sheet? 180 120 60 -60 -120 -180 -180 180 o (degrees) O=-51°; Q=+153°; many Gly and Pro residues OA. O B. D=+60°; Y=+60°; many Gly residues OC. ®=-57"; y-49°; many Ala residues OD. D=-139°; =+135°; many Val residues O=-120°; y-+120°; many Tyr residues (səəBəp)
Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:The carbon-nitrogen peptide bond is rigid, but rotation can take place about the N-Ca and the Ca-C bonds in a protein (Ca is the a carbon atom). These bond
angles define the conformation of the peptide chain.
Consider the Ramachandran plot to answer both questions.
Which dihedral angles and residues would not likely occur in a ß sheet?
180
120
60
-60
-120
-180
-180
180
+ (degrees)
OA.
0=-51°; U=+153°; many Gly and Pro residues
D=+60°; u=+60°; many Gly residues
В.
OC.
D=-57°; W=-49°; many Ala residues
D=-139°; W=+135°; many Val residues
OD.
D=-120°; U=+120°; many Tyr residues
DE.
(səəbap)
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