Identification Of Aldehyde Oxidase 3 As A Binding Protein For Squid Ink Polysaccharides Using Magnetic Nanoparticles

To explore the interactive molecules of squid ink polysaccharides (SIP) for further understanding the action mechanisms of SIP bio-function, this study prepared SIP binding proteins from mouse liver using superparamagnetic nanometer beads. Michaelis-Menten constant (K-m) was detected from a Lineweaver-Burk double reciprocal plot to assess effect of SIP on activity of aldehyde oxidase (AOX). Results showed that three proteins, AOX-3, regucalcin (RGN) and alpha 1-antitrypsin (A1AT3) were separated from mouse liver by magnetic nanoparticles conjugated with SIP. Contents of AOX-3 were much more than RGN and A1AT3. SIP (0.5 mg mL(-1)) reduced K-m value of aldehyde oxidase of mouse liver from 91.79 mu mol L-1 to 43.70 mu mol L-1.