About the Center

The Biomolecular X-Ray Crystallography Center in the Department of Structural Biology is a shared resource designed to facilitate studies of protein and macromolecular structure and function by investigators at St. Jude Children’s Research Hospital.  

The Center has determined thousands of structures from a myriad of biological systems. Those atomic-resolution structures, ranging from small molecules and peptides to macromolecular assemblies of proteins and nucleic acids, serve as foundation for drug discovery efforts at St. Jude and offer exquisite insight into molecular recognition in various biological processes.

The Center is staffed by expert scientists with extensive experience in all aspects of crystallography for high-quality structure determination. The staff is committed to training and supporting researchers at every level who wish to apply X-ray crystallography to their projects. Collaborations are welcomed. Please contact the director with requests for consultation and assistance with project planning, experimental design, crystallization, data collection, structure determination, structure interpretation and manuscript preparation.

The Biomolecular X-Ray Crystallography Center

The Center is equipped with numerous instruments that enable every aspect of macromolecular crystallography. 

Crystallization, imaging and storage. Two crystallization robots allow rapid nanoliter dispensing for efficient screening of a large number of conditions to identify crystal hits. The Mosquito LCP (SPT Labtech) with humidification chamber is the most versatile and allows crystallization of membrane proteins using lipidic mesophases. The Center houses 20 °C and 4 °C Rock Imager 1000 plate hotels (Formulatrix) automated for high-quality image capture using visible, cross-polarized and UV light. For efficient crystal optimization, the Dragonfly liquid handler (SPT Labtech) aids in custom 96-well screen formulation. Dedicated 20 °C and 4 °C walk-in rooms with stereomicroscopes are available for plate storage, visualization, and crystal manipulation.  

Data collection and computing. St. Jude researchers working with the Center routinely collect synchrotron data remotely using a dedicated workstation within the Center. As a member of the SouthEast Regional Collaborative Access Team (SER-CAT), St. Jude researchers enjoy regular access to the Advanced Photon Source (18 days annually). The Center also has access to cutting-edge National Synchtrotron Light Source II (NSLS-II) beamlines: Frontier Microfocusing Macromolecular Crystallography (FMX) for challenging protein crystals requiring the latest micro-focusing technology and Highly Automated Macromolecular Crystallography (AMX) for high-throughput drug-discovery. In addition, the Center maintains an in-house X-ray diffraction laboratory equipped with a Bruker AXS D8 Venture system for diffraction screening and data collection on larger well-diffracting crystals. The Center features full-service raw data management and extensive Linux computing infrastructure for efficient data processing, structure determination and post-structure analysis. 

The Biomolecular X-Ray Crystallography Center


About the Director

Darcie Miller received her BSc in Biochemistry from UNC Chapel Hill and her PhD from UT Austin. Her PhD training in drug discovery included protein X-ray crystallography, biochemistry, and molecular modeling. As an NIH postdoctoral trainee at the Northwestern University Feinberg School of Medicine, she was part of the NIH Protein Structure Initiative (MCSG), working with leaders in the crystallography field, solving de novo structures and characterizing proteins through structure and bioinformatics approaches. She joined St. Jude in 2004 to pursue science in a collaborative, disease-focused setting. She became a departmental staff scientist in 2007, performing independent research in collaboration with faculty across the institution and training junior scientists in all aspects of macromolecular X-ray crystallography. Having expanded crystallographic operations at St. Jude for ten years, Dr. Miller was appointed Director in 2017.

Darcie Miller

X-Ray Crystallography Center Staff

  • Seetharaman Jayaraman, PhD – Senior Scientist [Former beamline scientist at NSLS-II, Brookhaven National Laboratory]        
  • John Bollinger, PhD – Scientist [Computing and X-ray scientist; software architect and Red Hat certified system administrator]

Contact us

Darcie Miller, PhD – Director 

Structural Biology MS311

St. Jude Children Research Hospital

262 Danny Thomas Place
Memphis, TN, 38105-3678 USA

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