Issue 3, 2022

Design and engineering of neuroglobin to catalyze the synthesis of indigo and derivatives for textile dyeing

Abstract

The old dye indigo is still demanded worldwide, whereas chemical synthesis of indigo may cause environmental problems. Alternatively, the biosynthesis of indigo is an eco-friendly approach. In this study, by protein design and engineering, we showed that human neuroglobin (Ngb) can be converted into an enzyme capable of efficient synthesis of indigo from indole. Three mutations were rationally designed to stabilize the protein (A15C), enhance H2O2 activation (H64D), and facilitate electron transfer (F49Y), respectively. Kinetic studies and product analysis revealed that the triple mutant A15C/H64D/F49Y Ngb exhibits an activity much higher than those of the engineered myoglobin mutants, without the need of expensive cofactors required for cytochromes P450. This enzyme can also efficiently catalyze the coupling oxidation of indole derivatives containing –Cl/–Br/–NO2 groups, producing indigo derivative dyes, with a yield up to ∼90% and chemoselectivity up to ∼97%, respectively. Moreover, these synthesized dyes were successfully applied to dye cotton textiles with uniform colors such as blue, red, yellow, purple, and even green. Thus, we expect that the engineered enzyme of Ngb will have practical applications in the textile dyeing industry.

Graphical abstract: Design and engineering of neuroglobin to catalyze the synthesis of indigo and derivatives for textile dyeing

Supplementary files

Article information

Article type
Paper
Submitted
28 אוג 2021
Accepted
30 נוב 2021
First published
30 נוב 2021

Mol. Syst. Des. Eng., 2022,7, 239-247

Design and engineering of neuroglobin to catalyze the synthesis of indigo and derivatives for textile dyeing

L. Chen, J. Xu, L. Li, S. Gao, G. Wen and Y. Lin, Mol. Syst. Des. Eng., 2022, 7, 239 DOI: 10.1039/D1ME00123J

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements