Recombinant expression of Ole e 6, a Cys-enriched pollen allergen, in Pichia pastoris yeast: detection of partial oxidation of methionine by NMR.
Related Articles Recombinant expression of Ole e 6, a Cys-enriched pollen allergen, in Pichia pastoris yeast: detection of partial oxidation of methionine by NMR.
Protein Expr Purif. 2004 Oct;37(2):336-43
Authors: Barral P, Tejera ML, Treviño MA, Batanero E, Villalba M, Bruix M, Rodríguez R
Olive pollen is one of the main causes of allergy in Mediterranean countries. Ole e 6, an olive pollen allergen, is a small (5.8 kDa) and acidic protein (pI 4.2) and no homologous proteins have been isolated or characterized so far. Ole e 6 has been efficiently expressed in the methylotrophic yeast Pichia pastoris. The cDNA encoding Ole e 6 was inserted into the plasmid vector pPIC9 and overexpressed in GS115 yeast cells. The recombinant product was purified by size-exclusion chromatography followed by reverse-phase HPLC. N-terminal sequencing, amino acid composition analysis, CD, NMR, and IgG-binding experiments were employed to characterize the purified protein. NMR data revealed the oxidation of the methionine at position 28 in approximately 50% of the recombinant protein but, although this alters its electrophoretic behavior, it did not affect folding or IgG-binding properties of rOle e 6. The recombinant form of Ole e 6 expressed in P. pastoris can be employed for structural and biochemical studies.
PMID: 15358355 [PubMed - indexed for MEDLINE]
Source:
PubMed