4.7 Article

Rheological behavior, conformational changes and interactions of water-soluble myofibrillar protein during heating

Journal

FOOD HYDROCOLLOIDS
Volume 77, Issue -, Pages 524-533

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.foodhyd.2017.10.030

Keywords

Water-soluble myofibrillar protein; Myosin; High-pressure homogenization; Thermal stability; Protein aggregation

Funding

  1. National Natural Science Foundation of China [31671875]
  2. Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD) [080-809001]

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For greater utilization of meat as a source of high-quality protein supplements, we investigated the effects of heating (30-80 degrees C) on the solubility, rheological behavior, conformational changes and interactions of water-soluble chicken breast myofibrillar protein (WSMP) prepared by high-pressure homogenization (HPH) in comparison with those of salt-soluble myofibrillar protein (SSMP) and HPH-treated SSMP (H-SSMP). Upon heating above 40 degrees C, WSMP exhibited a shear-thinning behavior with relatively high solubility and flow ability. The thermal gelling ability appeared to be impaired, probably due to weak myosin-head aggregation (30-50 degrees C) and less interaction between myosin tails (70 degrees C). WSMP was less prone to unfolding during heating and resulted in smaller protein aggregates in comparison to SSMP and H-SSMP. Moreover, the lower extent of thermally induced disulfide cross-links and hydrophobic and electrostatic interactions led to improved colloidal stability in WSMP. The enhanced solubility and flow ability of WSMP after heating are beneficial to the development of new meat-based products. (C) 2017 Elsevier Ltd. All rights reserved.

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