Pichia pastoris wall protein Gcw49, surface display system constructed by same and construction method of surface display system
A surface display system and construction method technology, applied in chemical instruments and methods, botanical equipment and methods, biochemical equipment and methods, etc., can solve the problems of low expression of Pir protein and general effect of anchoring protein, etc., and achieve high The effect of expressive efficiency
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Embodiment 1
[0036] Example 1: Cloning, expression and identification of Pichia pastoris wall protein GCW49 gene
[0037] (1) Cloning of Pichia pastoris wall protein GCW49 gene
[0038] According to the gene sequence SEQ NO.4 of the Pichia pastoris wall protein GCW49 and the characteristics of the multiple cloning site on the Pichia pastoris plasmid pPIC9K, synthetic primers were designed:
[0039]
[0040] The box part of primer P1 is EcoR I restriction site, the underlined part is Mlu I restriction site, the italic part is the FLAG tag sequence; the underlined part of primer P2 is notI restriction site. Using Pichia pastoris GS115 genomic DNA as a template and P1 and P2 as primers, the wall protein GCW49 gene sequence was amplified by PCR. The amplification conditions were: pre-denaturation at 94°C for 5 minutes; followed by 30 more cycles : Denaturation at 94°C for 30 seconds, annealing at 55°C for 30 seconds, extension at 72°C for 1 minute; finally extension at 72°C for 7 m...
Embodiment 2
[0045] Example 2: Construction of Pichia pastoris wall protein GCW49 surface display vector p9KGCW49
[0046] (1) Cloning of Pichia pastoris wall protein GCW49 gene
[0047] According to the gene sequence of Pichia pastoris wall protein GCW49 and the characteristics of multiple cloning sites on Pichia pastoris plasmid pPIC9K, synthetic primers were designed:
[0048]
[0049] The underlined part of primer P2 is not I enzyme cleavage site; the box part of primer P3 is EcoR I restriction site, the underlined part is Mlu I restriction site. Using Pichia pastoris GS115 genomic DNA as a template and P2 and P3 as primers, the wall protein GCW49 gene sequence was amplified by PCR. The amplification conditions were: pre-denaturation at 94°C for 5 minutes; followed by 30 cycles or less : Denaturation at 94°C for 30 seconds, annealing at 55°C for 30 seconds, extension at 72°C for 1 minute; finally extension at 72°C for 7 minutes. The Pichia pastoris wall protein GCW49 ...
Embodiment 3
[0052] Example 3: Construction of Pichia pastoris wall protein GCW49 surface display vector pZαAGCW49
[0053] (1) Cloning of Pichia pastoris wall protein GCW49 gene
[0054] According to the gene sequence of Pichia pastoris wall protein GCW49 and the characteristics of multiple cloning sites on Pichia pastoris plasmid pPIC9K, synthetic primers were designed:
[0055] P2: 5'-TATATA GCGGCCGC TCAAGCCAATAACACC-3' (SEQ NO: 3)
[0056] P4: 5'-GCGC CTCGAG GACTCAGTGGAATTTTACAT-3' (SEQ NO: 6)
[0057] The underlined part of primer P2 is not I restriction site; the underlined part of primer P4 is xho I restriction site. Using Pichia pastoris GS115 genomic DNA as a template and P2 and P4 as primers, the gene sequence of the wall protein GCW49 was amplified by PCR method. The amplification conditions were: pre-denaturation at 94°C for 5 minutes; followed by 30 cycles: 94°C Denaturation for 30 seconds, annealing at 55°C for 30 seconds, extension at 72°C for 1 minute; final ex...
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