title: Solid phase synthesis of hydrophobic difficult sequence peptides on BDDMA-PS support.
abstract: This article illustrates the successful and efficient solid phase assembly of hydrophobic difficult sequence peptides following both t-Boc and Fmoc chemistry. The peptides were synthesized on an optimized 1,4-butanediol dimethacrylate-crosslinked polystyrene support (BDDMA-PS). Four difficult sequence test peptides, VAVAG, VIVIG, QVGQVELG and VQAAIDYING, were synthesized in relatively good yield and purity without any aggregation problems. The peptides were assembled on chloromethylated and 4-hydroxymethylphenoxymethyl (HMP) BDDMA-PS resins. The peptides were fabricated using Boc amino acid 1-hydroxybenzotriazolyl and Fmoc amino acid pentafluorophenyl active esters in coupling reactions. The peptides after synthesis were cleaved from the polymeric support by exposing the peptidyl resin to 90% trifluroacetic acid/5% thioanisole/5% EDT mixture. The HPLC and MALDI TOF MS studies of the peptides revealed the high homogeneity of the synthesized peptides. Chloromethylated resin having a functional group loading of 1.14 mmol Cl/g was used for the synthesis. The yield and homogeneity of these peptides synthesized using the new support were high when compared with the conventional DVB-PS resin.
authors.affiliation: School of Chemical Sciences, Mahatma Gandhi University, Kottayam, Kerala, India.
authors.forename: P K
authors.initials: PK
authors.lastname: Ajikumar
authors.forename: K S
authors.initials: KS
authors.lastname: Devaky
mesh_terms: D002851:Chromatography, High Pressure Liquid; D010452:Peptide Biosynthesis; D010455:Peptides / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; D013343:Styrenes / Q000737:chemistry; D013997:Time Factors
chemical_list: D010455:Peptides; D011108:Polymers; D013343:Styrenes