Method for disrupting seaweed cells by using yeast display pectinase cooperated with ultrasonic waves
A technology of pectinase and ultrasound, applied in the field of bioengineering, can solve problems affecting the efficiency of laver cell crushing, unfavorable laver polysaccharide and laver protein extraction, etc.
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Embodiment 1
[0026] Example 1 Preparation of Yeast Displayed Pectinase and Yeast Displayed Protease
[0027] By artificial synthesis, pectinase gene (Genbank number: GU277799.1), protease gene (Genbank number: NM_012708.2) and cell wall α-lectin gene of Pichia pastoris GS115 (Genbank number: M28164) were synthesized. The C-terminus of the pectinase gene (or protease gene) is added with the connecting peptide sequence GSSGGSGGSGGSGGSGS (linker), and the nucleotide sequence PEC-linker-α-agglutinin (or PRO-linker-α-agglutinin) is obtained after the connection, and the two Add EcoR I and Not I restriction sites at the end, where PEC is the pectinase gene (PRO is the protease gene), and α-agglutinin is the cell wall α-lectin gene.
[0028] Using the above artificially synthesized sequences as templates, PCR amplification was carried out using the following primer pairs respectively,
[0029] Primer pairs for pectinase:
[0030] Upstream primer: 5'-TGGCCCTGGACATGGAATCAGTGTTGGGAG-3';
[0031] ...
Embodiment 2
[0039] Example 2 Yeast Displayed Pectinase Collaborative Ultrasonic Disruption of Porphyra Cells
example 1
[0040] Example 1 Prepare a mixed suspension with 1000 grams of water, 20 grams of dried seaweed powder, and 1 gram of yeast-displayed pectinase. The stirring speed of the system is 100 rpm, the temperature is 35°C, and the treatment time is 30 minutes. The power was 730W, the ultrasonic treatment time was 65min, and the treatment temperature was 30°C to obtain a cell disruption solution, which was centrifuged (4000g for 30min) to remove the precipitate, and then the yield of laver protein and laver polysaccharide in the supernatant was measured.
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