BioMAX is the first X-ray macromolecular crystallography beamline of MAX IV Laboratory, which begins its user operations in 2017. It is a state-of-the-art resource accommodating multiple cutting edge experimental possibilities. The design goal for BioMAX was to create a stable and reliable beamline that is user friendly. The beamline experiment set-up is highly automated, in terms of both sample handling hardware and data analysis, including feedback on the data collection.
The X-ray beam focus is 20 x 5 μm2 at the sample position with a photon flux of 2 x 1013 ph/s at 500 mA ring current. The operational energy range of the beamline is 5–25 keV. Alternatively, using aperture overfilling it is possible to obtain a stable 5 x 5 μm2 beam at the sample position. Due to its extensive energy tunability, BioMAX is an ideal source for de novo phasing using the anomalous signal of heavy elements. Beam defocusing creates a practically parallel beam, which can be used to resolve extremely large unit cells > 1000 Å at high resolution. Due to its small beam cross-section and optional parallel beam, BioMAX is an optimal experimental set-up for X-ray crystallography using microcrystals and ultra large unit cells.
|Techniques||MX, MAD, SAD, SSAD, Atomic resolution data collection, Large sample ensemble screening, In situ crystal diffraction|
|Beam Size||20 x 5 μm2|
|Energy Range||5-25 keV|
|Samples||Single crystal (1 - 100 μm)|
First users at BioMAX
The first user experiment on FabG-NADP complex at BioMAX was carried out by Peter Vella, Robert Schnell, Gunter Schneider at the Division of Molecular Structural Biology, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden. The crystal structure of FabG from Acinetobacter baumannii was determined to 1.8 Å resolution from x-ray diffraction data collected at the