Topic
Reflectin
About: Reflectin is a research topic. Over the lifetime, 42 publications have been published within this topic receiving 1115 citations.
Papers
TL;DR: This work reports proton conductivity for thin films composed of reflectin, a cephalopod structural protein, and finds it possible to use reflectin in protein-based protonic transistors, which may hold implications for the next generation of biocompatible proton-conducting materials and Protonic devices.
Abstract: Proton-conducting materials play a central role in many renewable energy and bioelectronics technologies, including fuel cells, batteries and sensors. Thus, much research effort has been expended to develop improved proton-conducting materials, such as ceramic oxides, solid acids, polymers and metal-organic frameworks. Within this context, bulk proton conductors from naturally occurring proteins have received somewhat less attention than other materials, which is surprising given the potential modularity, tunability and processability of protein-based materials. Here, we report proton conductivity for thin films composed of reflectin, a cephalopod structural protein. Bulk reflectin has a proton conductivity of ~2.6 × 10(-3) S cm(-1) at 65 °C, a proton transport activation energy of ~0.2 eV and a proton mobility of ~7 × 10(-3) cm(2) V(-1) s(-1). These figures of merit are similar to those reported for state-of-the-art artificial proton conductors and make it possible to use reflectin in protein-based protonic transistors. Our findings may hold implications for the next generation of biocompatible proton-conducting materials and protonic devices.
241 citations
TL;DR: It is demonstrated that these iridophores of the squid Loligo pealeii can be chemically tuned to reflect the entire visible spectrum, and it is shown that this dynamic optical function is facilitated by the hierarchical assembly of nanoscale protein particles that elicit large volume changes upon condensation.
95 citations
TL;DR: In this paper, the authors describe cloning structural characterization and optical properties of a reflectin-based domain, refCBA, from reflectin 1a of Hawaiian bobtail squid, Euprymna scolopes.
Abstract: : Reflectins are a unique group of structural proteins involved in dynamic optical systems in cephalopods that modulate incident light or bioluminescence. We describe cloning structural characterization, and optical properties of a reflectinbased domain, refCBA, from reflectin 1a of Hawaiian bobtail squid, Euprymna scolopes. Thin films created from the recombinant protein refCBA display interesting optical features when the recombinant protein is appropriately organized. RefCBA was cloned and expressed as a soluble protein enabling purification, with little structural organization found using Fourier transform infrared spectroscopy and circular dichroism. Single-layer and multi-layer thin films of refCBA were then produced by flow coating and spin coating, and displayed colors due to thin film interference. Diffraction experiments showed the assemblies were ordered enough to work as diffraction gratings to generate diffraction patterns. Nano-spheres and lamellar microstructures of refCBA samples were observed by scanning electron microscopy and atomic force microscopy. Despite the reduced complexity of the refCBA protein compared to natural reflectins, unique biomaterials with similar properties to reflectins were generated by self-assembled reflectin-based refCBA molecules.
65 citations
TL;DR: It is shown that reversible titration of the excess positive charges of the reflectins, comparable with that produced by phosphorylation, is sufficient to drive the reversible condensation and hierarchical assembly of these proteins.
59 citations
TL;DR: Differences in reflectin structures and phosphorylation determine the emergent photonic behavior of reflective squid tissues, and analysis of the tissue specificity of reflectin subtypes reveals that tunability is correlated with the presence of one specific reflectin sequence.
58 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 5 |
| 2020 | 6 |
| 2019 | 2 |
| 2018 | 2 |
| 2017 | 6 |
| 2016 | 4 |