de Sanctis D, Zubieta C, Felisaz F, Caserotto H, Nanao MH. Radiation-damage-induced phasing: a case study using UV irradiation with light-emitting diodes.
Acta Crystallogr D Struct Biol 2016;
72:395-402. [PMID:
26960126 PMCID:
PMC4784670 DOI:
10.1107/s2059798315021658]
[Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Accepted: 11/15/2015] [Indexed: 11/16/2022] Open
Abstract
Exposure to X-rays, high-intensity visible light or ultraviolet radiation results in alterations to protein structure such as the breakage of disulfide bonds, the loss of electron density at electron-rich centres and the movement of side chains. These specific changes can be exploited in order to obtain phase information. Here, a case study using insulin to illustrate each step of the radiation-damage-induced phasing (RIP) method is presented. Unlike a traditional X-ray-induced damage step, specific damage is introduced via ultraviolet light-emitting diodes (UV-LEDs). In contrast to UV lasers, UV-LEDs have the advantages of small size, low cost and relative ease of use.
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