Protein Information

Name thioredoxin reductase
Synonyms ACR 1; PLP; ACR1; AOEB166; Alu corepressor 1; Antioxidant enzyme B166; B166; Liver tissue 2D page spot 71B…

Compound Information

Name azobenzene
CAS diphenyldiazene

Reference List

PubMed Abstract RScore(About this table)
10984402 Renner C, Cramer J, Behrendt R, Moroder L: Photomodulation of conformational states. Biopolymers. 2000 Dec;54(7):501-14.

Correspondingly, the active-site octapeptide fragment H-Ala-Cys-Ala-Thr-Cys-Asp-Gly-Phe-OH [134-141] of thioredoxin reductase, with its high preference for a 3 (10)-helix turn conformation centered on the Thr-Cys sequence, was backbone cyclized with this azobenzene moiety in the attempt to design a photoresponsive system where the conformational states of the peptide backbone are dictated by the configuration of the azobenzene and can be further modulated by the disulfide bridge.
31(0,1,1,1) Details
10984401 Renner C, Behrendt R, Sporlein S, Wachtveitl J, Moroder L: Photomodulation of conformational states. Biopolymers. 2000 Dec;54(7):489-500.

The thioredoxin reductase active-site fragment H-Ala-Cys-Ala-Thr-Cys-Asp-Gly-Phe-OH [134-141], which is known for its high tendency to assume an almost identical conformation as in the intact enzyme, was backbone cyclized with the photoresponsive (4-amino) phenylazobenzoic acid (APB) to produce a monocyclic and disulfide-bridged bicyclic APB-peptide.
First femtosecond spectroscopic analysis of the dynamics of the photoreaction confirm a fast first phase on the femtosecond time scale related to the cis/trans isomerization of the azobenzene moiety followed by a slower phase in the picosecond time scale that involves an adjustment of the peptide backbone.
1(0,0,0,1) Details
11920439 Renner C, Behrendt R, Heim N, Moroder L: Photomodulation of conformational states. Biopolymers. 2002 May;63(6):382-93.

In previous studies we have shown that light-induced cis/trans isomerization of the azobenzene moiety in cyclo-[Ala-Cys-Ala-Thr-Cys-Asp-Gly-Phe-AMPB] [AMPB: (4-aminomethyl) phenylazobenzoic acid] leads both in the monocyclic and in the oxidized bicyclic form to markedly differentiated conformational states in DMSO, a fact that lends itself for photomodulation of the redox potential of such bis-cysteinyl-peptides.
For this purpose water-soluble systems are required, and this was achieved by replacing three residues outside the Cys-Ala-Thr-Cys active-site motif of thioredoxin reductase with lysines.
1(0,0,0,1) Details
15637699 Milbradt AG, Loweneck M, Krupka SS, Reif M, Sinner EK, Moroder L, Renner C: Photomodulation of conformational states. Biopolymers. 2005 Apr 5;77(5):304-13.

In previous studies we have investigated octapeptides backbone-cyclized by (4-amino) phenyl azobenzoic acid (APB) or (4-aminomethyl) phenylazobenzoic acid (AMPB) and containing the active-site sequence Cys-Ala-Thr-Cys-Asp from the thioredoxin reductase.
The conformational and redox properties of these peptides were strongly dependent on the isomeric state of the azobenzene chromophore.
1(0,0,0,1) Details