Bond distances support double bonded nature of peptide bond Peptide bond resonance structures H 1.0A 1.51A 1.32A 1.45A 1.24A
Bond distances support double bonded nature of peptide bond
The carbonyl oxygen has a partial negative charge and the amide nitrogen a partial positive charge,setting up a small electric dipole. Virtually all peptide bonds in proteins occur in this trans configuration;an exception is noted in Figure 6-8b. H (a)
Trans configuration of peptide bond is favored for all amino acids except proline Trans Trans cis
Trans configuration of peptide bond is favored for all amino acids except proline
Structure of the peptide bond (M5.12) πorbital 0151 1102 116 120 0.1455 122 123.5 0124 5 πorbital a)Partial doub le-bond character (b)Bond angles and lengths ofpeptide bond Notice the planar nature of the peptide bond.The trans form is favored. Delocalization of the n-electron orbital over the O-C-N accounts for the partial double bond character of the peptide bond
Structure of the peptide bond (M5.12) Notice the planar nature of the peptide bond. The trans form is favored. Delocalization of the -electron orbital over the O-C-N accounts for the partial double bond character of the peptide bond
Although the peptide bond is planar, there is rotation around the bonds to the alpha carbon of each amino acid residue (A) (B) (C) 0=-80° Ψ=+85°
Although the peptide bond is planar, there is rotation around the bonds to the alpha carbon of each amino acid residue