Use of azobenzene amino acids as photo-responsive conformational switches to regulate antibody–antigen interaction

Title data

Parisot, Judicaël ; Kurz, Katrin ; Hilbrig, Frank ; Freitag, Ruth:
Use of azobenzene amino acids as photo-responsive conformational switches to regulate antibody–antigen interaction.
In: Journal of Separation Science. Vol. 32 (2009) Issue 10 . - pp. 1613-1624.
ISSN 1615-9314
DOI: https://doi.org/10.1002/jssc.200800698

Official URL:

Abstract in another language

In an attempt to exploit the large geometry changes associated with azobenzene photo-isomerization for the modulation of antibody-antigen interaction, we introduced in the backbone of the FLAG peptide (DYKDDDDK), an azobenzene unit to photo-modulate its conformational states and consequently its interaction with the monoclonal anti-FLAG-tag antibody M1. The FLAG-tag system is an established technique for purifying and detecting the corresponding fusion proteins. In this context, conflicting evidence has been presented regarding the necessity of calcium for stable binding. Using surface plasmon resonance, we showed that not the initial recognition but certainly the stability of the complex improves in the presence of calcium. Subsequently, we substituted two or three of the central aspartate residues for an artificial, azobenzene-based, photo-responsive amino acid. Four structural isomers of the artificial amino acid were considered, in total twelve FLAG-tag analogues were synthesized. Two showed significant differences in their ability to bind to the antibody in their cis versus their trans state. Interestingly, these two peptides are the two shortest of the twelve photo-peptides investigated. Finally, it was shown that for these two FLAG-analogues switching between cis and trans states is possible in the presence of the antibody.

Further data

Item Type:	Article in a journal
Refereed:	Yes
Keywords:	Azobenzene; FLAG-tag, Monoclonal antibody; Photo-responsive peptide antigen, Surface plasmon resonance
Institutions of the University:	Faculties > Faculty of Engineering Science Faculties > Faculty of Engineering Science > Chair Process Biotechnology Faculties > Faculty of Engineering Science > Chair Process Biotechnology > Chair Process Biotechnology - Univ.-Prof. Dr. Ruth Freitag Faculties
Result of work at the UBT:	Yes
DDC Subjects:	600 Technology, medicine, applied sciences 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited:	24 Feb 2016 13:27
Last Modified:	14 Jul 2022 11:08
URI:	https://eref.uni-bayreuth.de/id/eprint/31033