5o4c
From Proteopedia
From macrocrystals to microcrystals: a strategy for membrane protein serial crystallography
Structural highlights
Function[RCEM_BLAVI] The reaction center is a membrane-bound complex that mediates the initial photochemical event in the electron transfer process of photosynthesis. [CYCR_BLAVI] The reaction center of purple bacteria contains a tightly bound cytochrome molecule which re-reduces the photo oxidized primary electron donor.[1] [RCEL_BLAVI] The reaction center is a membrane-bound complex that mediates the initial photochemical event in the electron transfer process of photosynthesis. [RCEH_BLAVI] The reaction center is a membrane-bound complex that mediates the initial photochemical event in the electron transfer process of photosynthesis. Publication Abstract from PubMedSerial protein crystallography was developed at X-ray free-electron lasers (XFELs) and is now also being applied at storage ring facilities. Robust strategies for the growth and optimization of microcrystals are needed to advance the field. Here we illustrate a generic strategy for recovering high-density homogeneous samples of microcrystals starting from conditions known to yield large (macro) crystals of the photosynthetic reaction center of Blastochloris viridis (RCvir). We first crushed these crystals prior to multiple rounds of microseeding. Each cycle of microseeding facilitated improvements in the RCvir serial femtosecond crystallography (SFX) structure from 3.3-A to 2.4-A resolution. This approach may allow known crystallization conditions for other proteins to be adapted to exploit novel scientific opportunities created by serial crystallography. From Macrocrystals to Microcrystals: A Strategy for Membrane Protein Serial Crystallography.,Dods R, Bath P, Arnlund D, Beyerlein KR, Nelson G, Liang M, Harimoorthy R, Berntsen P, Malmerberg E, Johansson L, Andersson R, Bosman R, Carbajo S, Claesson E, Conrad CE, Dahl P, Hammarin G, Hunter MS, Li C, Lisova S, Milathianaki D, Robinson J, Safari C, Sharma A, Williams G, Wickstrand C, Yefanov O, Davidsson J, DePonte DP, Barty A, Branden G, Neutze R Structure. 2017 Jul 27. pii: S0969-2126(17)30217-4. doi:, 10.1016/j.str.2017.07.002. PMID:28781082[2] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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