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- Edlund, Petra, et al.
(författare)
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The room temperature crystal structure of a bacterial phytochrome determined by serial femtosecond crystallography
- 2016
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Ingår i: Scientific Reports. - : Springer Science and Business Media LLC. - 2045-2322. ; 6
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Tidskriftsartikel (refereegranskat)abstract
- Phytochromes are a family of photoreceptors that control light responses of plants, fungi and bacteria. A sequence of structural changes, which is not yet fully understood, leads to activation of an output domain. Time-resolved serial femtosecond crystallography (SFX) can potentially shine light on these conformational changes. Here we report the room temperature crystal structure of the chromophore-binding domains of the Deinococcus radiodurans phytochrome at 2.1 angstrom resolution. The structure was obtained by serial femtosecond X-ray crystallography from microcrystals at an X-ray free electron laser. We find overall good agreement compared to a crystal structure at 1.35 angstrom resolution derived from conventional crystallography at cryogenic temperatures, which we also report here. The thioether linkage between chromophore and protein is subject to positional ambiguity at the synchrotron, but is fully resolved with SFX. The study paves the way for time-resolved structural investigations of the phytochrome photocycle with time-resolved SFX.
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| 2. |
- Huang, L., et al.
(författare)
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Road traffic accident and its characteristics in Kathmandu valley
- 2016
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Ingår i: Journal of Nepal Medical Association. - : Journal of Nepal Medical Association (JNMA). - 0028-2715 .- 1815-672X. ; 55:203, s. 1-6
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Tidskriftsartikel (refereegranskat)abstract
- Introduction: Road traffic accident is alarming in Nepal. The objective of this research is to find out the characteristics of RTA in central part of Nepal. Methods: A prospective descriptive study was taken from 1 August 2014 to 31 July 2015. Data were collected from postmortem department and nine hospitals in Kathmandu Valley. Inventory sheets with targeted variables for secondary sources were created. Results: A total of 3461 morbidity cases from hospitals and 265 mortality cases from postmortem department were included in this study. The ratio of male victim to female was 2.3:1. Around 75% of victims were between 15-49 years old. Pedestrians were the most vulnerable (33%) followed by riders of motorized 2-3 wheelers. Two wheeler motorized vehicles were most frequently (67.2%) involved in RTAs. More RTA occurred on daytime, Saturdays, July and November. Around half of the victims did not arrive in hospitals in one hour. The most common injury type was soft tissue injury (37.6%), followed by open wound (20.9%), fracture (18%) and traumatic brain injuries (12.7%). Conclusions: According to the characteristic of RTA found in this study, following preventive measures are recommended Helmet was necessary for two wheeled backseat riders. Road safety education towards age group of 15-49 was compulsory. Precaution should neither be omitted regarding road safety on weekends, holidays, nor in rainy and festival season. Future studies could be focused on estimation of burden of disease caused by RTA and its determinants in Nepal. © 2016, Nepal Medical Association. All right reserved.
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