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 JoVE Biology

A Protocol for Computer-Based Protein Structure and Function Prediction

1Center for Computational Medicine and Bioinformatics, University of Michigan, 2Center for Bioinformatics and Department of Molecular Bioscience, University of Kansas


JoVE 3259

Guidelines for computer based structural and functional characterization of protein using the I-TASSER pipeline is described. Starting from query protein sequence, 3D models are generated using multiple threading alignments and iterative structural assembly simulations. Functional inferences are thereafter drawn based on matches to proteins with known structure and functions.

 JoVE Biology

Rapid Synthesis and Screening of Chemically Activated Transcription Factors with GFP-based Reporters

1The Lewis-Sigler Institute for Integrative Genomics, Princeton University, 2Department of Molecular Biology, Princeton University, 3Division of Chemistry and Chemical Engineering, California Institute of Technology


JoVE 51153

This protocol describes an experimental procedure for the rapid construction of artificial transcription factors (ATFs) with cognate GFP reporters and quantification of the ATFs ability to stimulate GFP expression via flow cytometry.

 JoVE Biology

Efficient Production and Purification of Recombinant Murine Kindlin-3 from Insect Cells for Biophysical Studies

1Division of Structural Biology, Wellcome Trust Centre for Human Genetics, University of Oxford


JoVE 51206

Kindlins are fundamental to cell adhesion through integrins but studies of them have been hampered by the difficulty encountered in expressing them recombinantly in bacterial hosts. We describe here methods for their efficient production in baculovirus-infected insect cells.

 JoVE Biology

Metabolic Labeling of Leucine Rich Repeat Kinases 1 and 2 with Radioactive Phosphate

1Laboratory for Neurobiology and Gene Therapy, Department of Neurosciences, KU Leuven and Leuven Institute for Neuroscience and Disease (LIND)


JoVE 50523

Leucine rich repeat kinases 1 and 2 (LRRK1 and LRRK2) are multidomain proteins which encode both GTPase and kinase domains and which are phosphorylated in cells. Here, we present a protocol to label LRRK1 and LRRK2 in cells with 32P orthophosphate, thereby providing a means to measure their overall cellular phophorylation levels.

 JoVE Biology

Affinity-based Isolation of Tagged Nuclei from Drosophila Tissues for Gene Expression Analysis

1Department of Biochemistry, Purdue University


JoVE 51418

Drosophila tissues often contain a heterogeneous mixture of cell types. To examine gene expression in specific cell types from a particular tissue, nuclei can be genetically tagged and subsequently isolated using an affinity-based approach. Isolated nuclei can be used for downstream applications such as gene expression analysis and chromatin immunoprecipitation.

 JoVE Biology

Chemically-blocked Antibody Microarray for Multiplexed High-throughput Profiling of Specific Protein Glycosylation in Complex Samples

1Institute for Hepatitis and Virus Research, 2Department of Microbiology and Immunology, Thomas Jefferson University, 3Drexel University College of Medicine, 4Van Andel Research Institute, 5Institute for Hepatitis and Virus Research, Serome Biosciences Inc.


JoVE 3791

In this study, we describe an improved protocol for a multiplexed high-throughput antibody microarray with lectin detection method that can be used in glycosylation profiling of specific proteins. This protocol features new reliable reagents and significantly reduces the time, cost, and lab equipment requirements as compared to the previous procedure.

 JoVE Immunology and Infection

Peptide-based Identification of Functional Motifs and their Binding Partners

1Department of Microbiology, Biochemistry, & Immunology, Morehouse School of Medicine, 2Institute for Systems Biology, 3Advanced Medical & Dental Institute, Universiti Sains Malaysia


JoVE 50362

Techniques to dissect the mechanisms underlying the secretion of HIV-1 Nef in exosomes are described. Specific short peptides derived from Nef and protein transfection were exploited to determine the structure, function, and binding partners of Nef’s Secretion Modification Region. These procedures have general relevance in many mechanistic studies.

 JoVE Biology

Pull-down of Calmodulin-binding Proteins

1Department of Cell Biology, Neurobiology and Anatomy, Medical College of Wisconsin


JoVE 3502

Calmodulin (CaM) pull-down assay is an effective way to investigate the interaction of CaM with various proteins. This method uses CaM-sepharose beads for efficient and specific analysis of CaM-binding proteins. This provides an important tool to explore CaM signaling in cellular function.

 JoVE Biology

Identification of Post-translational Modifications of Plant Protein Complexes

1School of Life Sciences, University of Warwick, 2The Sainsbury Laboratory, Norwich Research Park, 3Research School of Biology, The Australian National University


JoVE 51095

We describe here a protocol for the purification and characterization of plant protein complexes. We demonstrate that by immunoprecipitating a single protein within a complex, so we can identify its post-translational modifications and its interacting partners.

 JoVE Biology

Reconstitution of a Kv Channel into Lipid Membranes for Structural and Functional Studies

1Department of Cell Biology, University of Texas Southwestern Medical Center at Dallas


JoVE 50436

Procedures for complete reconstitution of a prototype voltage-gated potassium channel into lipid membranes are described. The reconstituted channels are suitable for biochemical assays, electrical recordings, ligand screening and electron crystallographic studies. These methods may have general applications to the structural and functional studies of other membrane proteins.

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