Abstract:
:Bacteriorhodopsin (BR) is the photoactive proton pump found in the purple membrane of the salt marsh archaeon Halobacterium salinarum. Evolution has optimized this protein for high photochemical efficiency, thermal stability and cyclicity, as the organism must be able to function in a hot, stagnant and resource-limited environment. Photonic materials generated via organic chemistry have yet to surpass the native protein in terms of quantum efficiency or cyclicity. However, the native protein still lacks the overall efficiency necessary for commercial viability and virtually all successful photonic devices using bacteriorhodopsin are based on chemical or genetic variants of the native protein. We show that genetic engineering can provide significant improvement in the device capabilities of proteins and, in the case of bacteriorhodopsin, a 700-fold improvement has been realized in volumetric data storage. We conclude that semi-random mutagenesis and directed evolution will play a prominent role in future efforts in bioelectronic optimization.
journal_name
Trends Biotechnoljournal_title
Trends in biotechnologyauthors
Wise KJ,Gillespie NB,Stuart JA,Krebs MP,Birge RRdoi
10.1016/s0167-7799(02)02023-1subject
Has Abstractpub_date
2002-09-01 00:00:00pages
387-94issue
9eissn
0167-7799issn
1879-3096pii
S0167-7799(02)02023-1journal_volume
20pub_type
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