JoVE Journal

Biochemistry

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Concanavalin A-Based Sedimentation Assay to Measure Substrate Binding of Glucan Phosphatases

This method describes a lectin-based in vitro sedimentation assay to quantify the binding affinity of glucan phosphatase and amylopectin. This co-sedimentation assay is reliable for measuring glucan phosphatase substrate binding and can be applied to various solubilized glucan substrates.

Chapters in this video

0:04

Introduction

1:03

Preparation of ConA‐Sepharose Beads and ConA‐Sepharose: Amylopectin Beads

2:19

Starch Excess4 (SEX4) Protein Binding with ConA‐Sepharose: Amylopectin Beads

3:41

Running SDS‐PAGE Gels

4:27

Western Blotting for Chemiluminescence Detection and Data Analysis

6:28

Results: Binding Affinity of SEX4 to ConA‐Sepharose‐Amylopectin Beads

8:18

Conclusion

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