A manually curated database of peptides containing Dehydro-Phenyl-Alanine and Amino-Iso-Butyric Acid
Protein Data Bank[PDB] Structured Data File [SDF]

AIB37

tert-Butyloxycarbonyl-Valine-Alanine-Leucine-Alpha amino iso butyric acid-Valine-Alanine-Leucine-Alpha amino iso butyric acid-Methyl ester

Sequence: Boc-V-A-L-Aib-V-A-L-Aib-OMe

Core Sequence: V-A-L-Aib-V-A-L-Aib

R Value: 0.0663

Residue Involved: Valine| Alanine| Leucine| Alpha amino iso butyric acid | Valine| Alanine| Leucine| Alpha amino iso butyric acid

Conformation: Helical

Reference

Karle, I., Flippen-Anderson, J., Uma, K. and Balaram, P. (1990). Apolar peptide models for conformational heterogeneity, hydration, and packing of polypeptide helices: Crystal structure of hepta- and octapeptides containing α-aminoisobutyric acid. Proteins: Structure, Function, and Genetics, 7(1), pp.62-73.

Chemical Component Summary

Name of Peptide: tert-Butyloxycarbonyl-Valine-Alanine-Leucine-Alpha amino iso butyric acid-Valine-Alanine-Leucine-Alpha amino iso butyric acid-Methyl ester
Sequence: Boc-V-A-L-Aib-V-A-L-Aib-OMe
Core Sequence: V-A-L-Aib-V-A-L-Aib
Sequence Length: 8
Molecular Weight (amu): 869.1 + 8.0
Molecular Formula: C42-H76-N8-O11.1/4CH3-0H
R Value: 0.0663
N-Terminal Modification: tert-Butyloxycarbonyl
C-Terminal Modification: Methyl ester
Conformation: Helical
Method: X - Ray Diffraction
Core Residue Involved Phi Psi Omega
Valine -60 -44 -179
Alanine -62 -36 175
Leucine -66 -49 -179
Alpha amino iso butyric acid -48 -52 -172
Valine -70 -34 -172
Alanine -72 -25 179
Leucine -134 -22 -179
Alpha amino iso butyric acid Unmeasured -178 -169