Pichia pastoris GS115 was cultured in YPD medium and protein were extracted and separated on SDS-PAGE followed by in-gel trypsin digestion. Protein were also digested in-solution using trypsin and fractionated using SCX and bRPLC. A total of 101 peptide fractions were analyzed on LTQ-Orbitrap Velos mass spectrometer. The raw data was searched using Mascot, Sequest and MS Amanda search algorithms against P. pastorisGS115 NCBI RefSeq database through Proteome Discoverer software suite.