DNA-directed spatial assembly of photosynthetic light-harvesting proteins

Henry, Sarah L. and Withers, Jamie M. and Singh, Ishwar and Cooper, Jonathan M. and Clark, Alasdair W. and Burley, Glenn A. and Cogdell, Richard J. (2016) DNA-directed spatial assembly of photosynthetic light-harvesting proteins. Organic and Biomolecular Chemistry, 14 (4). pp. 1359-1362. ISSN 1477-0520 (https://doi.org/10.1039/c5ob02351c)

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This manuscript describes the surface immobilization of a light-harvesting complex to prescribed locations directed by the sequence-selective recognition of duplex DNA. An engineered light-harvesting complex (RC-LH1) derived from Rhodopseudomonas (Rps.) palustris containing the zinc finger (ZF) domain zif268 was prepared. The zif268 domain directed the binding of zfRC-LH1 to target double-stranded DNA sequences both in solution and when immobilized on lithographically defined micro-patterns. Excitation energy transfer from the carotenoids to the bacteriochlorophyll pigments within zfRC-LH1 confirmed that the functional and structural integrity of the complex is retained after surface immobilization.