Structural Biology Techniques
Structural Biology Techniques - Related Videos
09:23
Assessing Two-dimensional Crystallization Trials of Small Membrane Proteins for Structural Biology Studies by Electron Crystallography
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Cited by 7 •
2010
Evaluating two-dimensional (2D) crystallization trials for the formation of ordered membrane protein arrays is a highly critical and difficult task in electron crystallography. Here we describe our approach in screening for and identifying 2D crystals of predominantly small membrane proteins in the range of 15 – 90kDa.
08:57
A Novel Technique for Generating and Observing Chemiluminescence in a Biological Setting
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2017
This protocol describes a new intraoperative imaging technique that uses a ruthenium complex as a source of chemiluminescent light emission, thereby producing high signal-to-noise ratios during in vivo imaging. Intraoperative imaging is an expanding field that could revolutionize the way that surgical procedures are performed.
07:28
Synthetic Biology
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2023
This video presents synthetic biology and its role in bioengineering. Synthetic biology refers to the methods used to genetically modify organisms in order to make them capable of producing large quantities of a product. This product could be a protein that the cell already makes or a new protein that has been encoded in a newly-inserted DNA sequence. Here, we discuss how an organism's genetic material is modified using transformation or transfection. Then, the process is shown in the...
09:02
SEM Imaging of Biological Samples
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2023
Source: Peiman Shahbeigi-Roodposhti and Sina Shahbazmohamadi, Biomedical Engineering Department, University of Connecticut, Storrs, Connecticut A scanning electron microscope (SEM) is an instrument that uses an electron beam to nondestructively image and characterize conductive materials in a vacuum. As an analogy, an electron beam is to the SEM as light is to the optical microscope. The difference is that the electron microscope yields images of much higher resolution and magnification. The...
12:51
Simultaneous Multicolor Imaging of Biological Structures with Fluorescence Photoactivation Localization Microscopy
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Cited by 13 •
2013
We demonstrate the use of fluorescence photo activation localization microscopy (FPALM) to simultaneously image multiple types of fluorescently labeled molecules within cells. The techniques described yield the localization of thousands to hundreds of thousands of individual fluorescent labeled proteins, with a precision of tens of nanometers within single cells.
FAQs
These methods differ primarily in the physical signal they analyze and the structural questions they can address. X-ray crystallography and cryo-electron microscopy obtain information through radiation-based measurements, whereas nuclear magnetic resonance uses magnetic fields. Their ability to resolve structures at different scales helps investigators select an approach suited to a particular biological molecule or complex.
Experimental measurements do not directly provide a complete three-dimensional structure. Computational reconstruction converts the recorded interactions into a structural representation, while model refinement improves how well that representation fits the measurements. This analysis connects raw experimental data with a molecular model that researchers can interpret in terms of binding, recognition, signaling, or other biological functions.
A structure may describe an individual biological molecule or a larger molecular complex, and those scales reveal different aspects of function. Smaller-scale views can clarify molecular architecture, while complex-level structures can show how partners associate. Considering both levels helps researchers relate specific contact sites to broader processes such as immune recognition or host-pathogen interaction.
Researchers first select a structural method according to the molecule or complex and the type of measurement required. They then collect radiation- or magnetic-field-based data, reconstruct a three-dimensional representation computationally, and refine the resulting model. The final structure is interpreted alongside the biological question, such as how a binding event changes recognition or signaling.
Structural analysis can show the molecular architecture of an antibody-antigen complex and identify how the two partners fit together. These observations connect physical contacts with immune recognition, helping researchers understand why a particular antibody binds its target. In immunology, that information can guide vaccine design or the engineering of molecules intended to interfere with disease-related interactions.
Structures of immune receptors and their associated molecular partners can clarify how binding interactions are organized at the molecular level. By examining these arrangements, researchers can relate receptor architecture to signaling behavior rather than treating recognition as an isolated event. Such insights support investigation of immune activation and the design of molecules that disrupt harmful signaling interactions.
Viral or bacterial proteins often depend on binding host factors to support disease-related processes. Determining the architecture of those complexes can expose the interaction surfaces that connect pathogen proteins with host molecules. Researchers can then use the structural information to support antiviral or antimicrobial development and to engineer molecules that interfere with pathogen-host binding.