Abstract
The glycation of silver carp myosin (Ms) with konjac oligo-glucomannan (KOG) of different degrees of deacetylation (DD) was investigated. As DD increased, the physico-chemical and functional properties of glycoconjugates changed. The available lysine content decreased, while grafting degree and total sulfhydryl group increased, andmeanwhile, the isoelectric point (pI) reduced. SDS-PAGE analysis indicated that glycation can be promoted as the increase of DD. The solubility increased significantly both in 0.1 M and 0.5 M NaCl solution, and the thermal stability increased when heated for 60 min at 80 °C. The emulsifying activity index (EAI) and emulsifying stability index (ESI) increased as well. These results showed that the highly deacetylated KOG (DKOG) was easier to glycate with myosin, leading to a great improvement in functional properties of myosin. It can be suggested that the reduction in steric hindrance of DKOG as a result of removal of acetyl groups facilitated the glycation.
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