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Protein-Protein Interaction Assay by X-ray Crystallography Service

Creative Biolabs currently pushes out X-ray crystallography with rational designs, facilities, and expertise to assist scientists to crystallize biological macromolecules and determine their three-dimensional structures. Based on the technique of X-ray crystallography, Creative Biolabs can obtain interactions between attractive proteins from customers. This precise imaging technology not only reveals the best visualization of protein structures at the atomic level but also accelerates the comprehending of protein’s interaction and function.

A Brief Introduction

X-ray crystallography is essentially a form of extreme high-resolution microscopy and represents the fact that X-ray is diffracted by crystal. With X-rays, the wavelength of electromagnetic radiation is around 0.1 nm to 1 Å long, which is just the right size to measure the distance between atoms in a molecule. Besides, the specificity of protein’s active and binding sites is completely dependent on the precise conformations of molecules. That’s why X-ray crystallography is chosen.

Protein-Protein Interaction Assay by X-ray Crystallography Service Fig.1 An X-ray diffraction pattern of a crystallized enzyme.

Before running this assay, a purified protein sample at high concentration is crystallized. X-rays strike the single crystal exposed to a diffractometer, where the crystalline atoms cause a beam of incident rays to diffract into numerous specific directions. As the crystal is gradually rotated, the intensities and angles of diffractive beams are recorded and fed into a computer, which utilizes mathematical equation with Fourier transforms to calculate the position of each atom and then produces a 3D digital image of electron density. Lately, a model of the protein is constructed, adjusted and refined by the electron density maps and X-ray diffraction patterns.

Protein-Protein Interaction Assay by X-ray Crystallography Service Fig.2 Overview of X-ray crystallographic method.

Features and Benefits

Crystallography can reliably provide the answer to structure related questions, from global folds to atomic details of bonding and the information from X-ray diffraction has enhanced the availability of protein structures and development on medicinal chemistry design greatly.

Functions of X-ray crystallography


Strengths on X-ray crystallography


The utilization of X-ray crystallography to measure protein structure has led to a significant breakthrough in the area of structural biochemistry and specifically provides extensional insights on protein-protein interactions within cellular processes.

X-ray crystallography provides a novel sight to explore interesting interactions of various proteins. The lab teams in Creative Biolabs have efficiently achieved high-resolution protein structure determination via X-ray crystallography to facilitate both structural biology and modern medical advancements. Armed with the results of X-ray crystallography services from Creative Biolabs, including sample purification, crystallization, and structure solution, combined with experienced operators and statistics analysis, clients will be guided to detail subsequent studies of relevant protein or complex crystals at structural, kinetic and thermodynamic aspects.

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