™ EasySelect Pichia Expression Kit For Expression of Recombinant Proteins Using pPICZ and pPICZα in Pichia pastoris Cat. no. K1740-01 Rev. Date 18 June 2010 Manual part no. 25-0172 MAN0000042 User Manual ii Table of Contents Important Information.................................................................................................................................v Accessory Products .................................................................................................................................. viii Introduction ................................................................................................................... 1 Overview .......................................................................................................................................................1 Experimental Outline...................................................................................................................................4 Methods ......................................................................................................................... 7 Pichia Strains.................................................................................................................................................7 E. coli Strains................................................................................................................................................10 Selecting a Pichia Expression Vector .......................................................................................................11 General Cloning Information ...................................................................................................................15 Cloning into pPICZ....................................................................................................................................18 Cloning into pPICZα..................................................................................................................................21 Transformation into E. coli ........................................................................................................................24 Preparing Transforming DNA .................................................................................................................26 Electroporation of Pichia............................................................................................................................27 EasyComp™ Transformation.....................................................................................................................29 Determining the Mut Phenotype .............................................................................................................33 Expressing Recombinant Pichia Strains...................................................................................................37 Analysis by SDS-Polyacrylamide Gel Electrophoresis .........................................................................42 Optimizing Pichia Protein Expression .....................................................................................................45 Scale-up of Expression...............................................................................................................................47 Purification..................................................................................................................................................50 Protein Glycosylation.................................................................................................................................52 Appendix...................................................................................................................... 53 E. coli Media Recipes..................................................................................................................................53 Pichia Media Recipes..................................................................................................................................54 Proteins Expressed in Pichia......................................................................................................................60 Recombination and Integration in Pichia ................................................................................................62 Lithium Chloride Transformation Method.............................................................................................64 Zeocin™ ........................................................................................................................................................66 PCR Analysis of Pichia Integrants ............................................................................................................68 Direct PCR Screening of Pichia Clones ....................................................................................................70 Isolating Total DNA from Pichia ..............................................................................................................71 Determining the Copy Number of Multiple Integrants........................................................................73 Isolating Total RNA from Pichia...............................................................................................................75 β-Galactosidase Assay ...............................................................................................................................76 Technical Support.......................................................................................................................................78 Purchaser Notification...............................................................................................................................80 References................................................................................................................... 82 iii iv Important Information Kit Contents The EasySelect™ Pichia Expression Kit contains the following components. The Pichia EasyComp™ Kit. This kit contains sufficient reagents for 6 preparations of competent cells. Each competent cell preparation yields enough cells for 20 transformations. Upon receipt, store Solutions I and III at 4°C. You may store Solution II at 4°C or at room temperature. Component Description Quantity Solution I Sorbitol solution containing ethylene glycol and 75 ml DMSO for the preparation of competent cells Solution II PEG solution for the transformation of competent 150 ml cells (2 × 75 ml) Solution III Salt solution for washing and plating transformed 150 ml cells (2 × 75 ml) Stab Vials: Pichia and E. coli stabs. Store at 4°C. Strain Genotype Phenotype (Pichia only) X-33 wild-type Mut+ GS115 his4 His–, Mut+ KM71H arg4 aox1::ARG4 MutS, Arg+ GS115/Albumin HIS4 MutS GS115/pPICZ/lacZ his4 His–, Mut+ q TOP10F´ E. coli F´ {proAB, lacI , lacZΔM15, Tn10 (TetR)} mcrA, Δ(mrr- hsdRMS-mcrBC), φ80lacZΔM15, ΔlacX74, deoR, recA1, λ– araD139, Δ(ara-leu)7697, galU, galK, rpsL(StrR), endA1, nupG Box 3: Vectors and Zeocin™. Store at –20°C Reagent Amount pPICZ A, B, and C 20 μg of each vector in TE buffer, pH 8.0* (40 μl at 500 ng/μl) pPICZα A, B, and C 20 μg of each vector in TE buffer, pH 8.0 (40 μl at 500 ng/μl) Zeocin™ 2 × 1.25 ml, 100 mg/ml *TE buffer, pH 8.0: 10 mM Tris-HCl, 1 mM EDTA, pH 8.0 Continued on next page v Important Information, continued Kit Contents, Box 4: Primers. Store at –20°C. continued Reagent Sequence Amount 5´ AOX1 5´-GACTGGTTCCAATTGACAAGC-3´ 2 μg, lyophilized sequencing primer 312 pmoles (5´ Pichia primer) 3´ AOX1 5´-GCAAATGGCATTCTGACATCC-3´ 2 μg, lyophilized sequencing primer 314 pmoles (3´ Pichia primer) α-Factor 5´-TACTATTGCCAGCATTGCTGC-3´ 2 μg, lyophilized sequencing primer 315 pmoles Media The following prepackaged media is included for your convenience. Instructions for use are provided on the package. Keep the media dry and store at room temperature. Media Amount Yield YP Base Medium 2 pouches 2 liters of YP medium YP Base Agar Medium 2 pouches 2 liters of YP agar medium Yeast Nitrogen Base 1 pouch 500 ml of 10X YNB The Pichia and TOP10F´ E. coli stabs supplied with the kit are guaranteed until the expiration date marked on tube when stored at 4°C. We recommend you prepare a set of glycerol master stocks prior to using your Pichia (page 9) and TOP10F´ E. coli cells (page 10). vi Important Information, continued Materials Supplied For the procedures described in this manual, you will need the following by the User reagents and equipment. Additional reagents may be required. Please check each experiment to ensure you have all the reagents necessary. • 30°C and 37°C rotary shaking incubator • Water baths capable of 16°C, 37°C, and 65°C • Centrifuge suitable for 50 ml conical tubes (floor or table-top) • Baffled culture flasks with metal covers (50 ml, 250 ml, 500 ml, 1000 ml, and 3 liters) • 50 ml sterile, conical tubes • 6 ml and 15 ml sterile snap-top tubes (Falcon 2059 or similar) • UV Spectrophotometer • Restriction enzymes and appropriate buffers • Agarose and low-melt agarose • Mini agarose gel apparatus and buffers • Glass milk • Sterile water • CIAP (calf intestinal alkaline phosphatase, 1 unit/μl) • 10X CIAP Buffer • Phenol/chloroform • 3 M sodium acetate • 100% ethanol • 80% ethanol • T4 Ligase (2.5 units/μl) • 10X Ligation Buffer (with ATP) • Low Salt LB medium (see page 53 for recipe) • Zeocin™ antibiotic (see page viii for ordering information) • Low Salt LB plates containing 25 μg/ml Zeocin™ • YPDS plates containing 100 μg/ml Zeocin™ plates