关键词: β-甘露聚糖酶, 嗜热酶, 基因资源, 分子改良

Abstract: β-Mannanase has important application prospect in bioenergy，feed， food，textile and other industries. β-Mannanase which belongs to hemicellulose enzymes exists in a wide variety of plants，animals and especially in microorganisms. With the extensive research of extremophiles and extreme enzymes，thermophilic mannanases receive much concern  because of their high enzyme activity and stability at high temperature. This paper reviewed the source and classification of β-mannanases and the hydrolysis pattern of thermophilic β-mannanase，as well the gene cloning，expression and molecular improvement. The research orientation and development prospects were also elucidated in this paper.

Key words: β-mannanases, thermophilic enzyme, genetic resources, molecular improvement