484-42-4Relevant articles and documents
HPLC FREE PURIFICATION OF PEPTIDES BY THE USE OF NEW CAPPING AND CAPTURE REAGENTS
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Page/Page column 17; 21, (2020/07/25)
The present disclosure relates to the use of a capping and capture reagent in solid phase peptide synthesis. The present disclosure further relates to a method of solid phase peptide synthesis, wherein a capping and capture reagent according to the present disclosure is used. The present disclosure further relates to a method for purification of a (full-length) synthetic peptide via use of a capping and capture reagent according to the present disclosure. The present disclosure also relates to a kit comprising a capping and capture reagent according to the present disclosure and an amino oxy resin or a hydrazine resin and the use of the kit.
A Vinylogous Photocleavage Strategy Allows Direct Photocaging of Backbone Amide Structure
Mangubat-Medina, Alicia E.,Martin, Samuel C.,Hanaya, Kengo,Ball, Zachary T.
supporting information, p. 8401 - 8404 (2018/06/29)
Side-chain modifications that respond to external stimuli provide a convenient approach to control macromolecular structure and function. Responsive modification of backbone amide structure represents a direct and powerful alternative to impact folding and function. Here, we describe a new photocaging method using histidine-directed backbone modification to selectively modify peptides and proteins at the amide N-H bond. A new vinylogous photocleavage method allows photorelease of the backbone modification and, with it, restoration of function.
Solid-phase peptide synthesis in highly loaded conditions
Nakaie, Clovis R.,Oliveira, Eliandre,Vicente, Eduardo F.,Jubilut, Guita N.,Souza, Sinval E.G.,Marchetto, Reinaldo,Cilli, Eduardo M.
experimental part, p. 101 - 109 (2011/06/25)
The use of very highly substituted resins has been avoided for peptide synthesis due to the aggravation of chain-chain interactions within beads. To better evaluate this problem, a combined solvation-peptide synthesis approach was herein developed taking as models, several peptide-resins and with peptide contents values increasing up to near 85%. Influence of peptide sequence and loading to solvation characteristics of these compounds was observed. Moreover, chain-chain distance and chain concentration within the bead were also calculated in different loaded conditions. Of note, a severe shrinking of beads occurred during the α-amine deprotonation step only when in heavily loaded resins, thus suggesting the need for the modification of the solvent system at this step. Finally, the yields of different syntheses in low and heavily loaded conditions were comparable, thus indicating the feasibility of applying this latter "prohibitive" chemical synthesis protocol. We thought these results might be basically credited to the possibility, without the need of increasing molar excess of reactants, of carrying out the coupling reaction in higher concentration of reactants - near three to seven folds - favored by the use of smaller amount of resin. Additionally, the alteration in the solvent system at the α-amine deprotonation step might be also improving the peptide synthesis when in heavily loaded experimental protocol.
