A reversible protection strategy to improve Fmoc-SPPS of peptide thioesters by the N-Acylurea approach.
A reversible protection strategy to improve Fmoc-SPPS of peptide thioesters by the N-Acylurea approach.
复制标题
DOI:
10.1002/cbic.201100472
复制
发表时间:
2011-11-04
期刊:
影响因子:
3.2
通讯作者:
Ottesen, Jennifer J.
中科院分区:
文献类型:
--
作者:
Mahto, Santosh K.;Howard, Cecil J.;Shimko, John C.;Ottesen, Jennifer J.
C-terminal peptide thioesters are an essential component of the native chemical ligation approach for the preparation of fully- or semi-synthetic proteins. However, efficient generation of C-terminal thioesters via Fmoc solid phase peptide synthesis remains a challenge. The recent N-acylurea approach to thioester synthesis relies on deactivation of one amine of 3,4-diaminobenzoic acid (Dbz) during Fmoc-SPPS. Here, we demonstrate that this approach results in the formation of side products by over-acylation of Dbz, particularly when applied to Gly-rich sequences. We find that orthogonal allyloxycarbonyl (Alloc) protection of a single Dbz amine eliminates these side products. We introduce a protected Fmoc-Dbz(Alloc) base resin that may be directly used for synthesis with most C-terminal amino acids. Following synthesis, quantitative removal of the Alloc group allows conversion to the active N-acyl-benzimidazolinone (Nbz) species, which may be purified and converted in situ to thioester under ligation conditions. This method is compatible with automated preparation of peptide-Nbz conjugates. We demonstrate that Dbz protection improves synthetic purity of Gly-rich peptide sequences derived from histone H4, as well as a 44-residue peptide from histone H3.
登录
查看更多内容
影响因子:
8
作者:
Berrade, Luis;Camarero, Julio A.
通讯作者:
Camarero, Julio A.
影响因子:
5.2
作者:
Bang, D;Pentelute, BL;Kent, SB
通讯作者:
Kent, SB
影响因子:
56.9
作者:
DAWSON, PE;MUIR, TW;KENT, SBH
通讯作者:
KENT, SBH
影响因子:
3.6
作者:
Camarero, JA;Hackel, BJ;Mitchell, AR
通讯作者:
Mitchell, AR
DOI:
10.1111/j.1399-3011.2001.00816.x
发表时间:
2001-03-01
期刊:
JOURNAL OF PEPTIDE RESEARCH
影响因子:
--
作者:
Grieco, P;Gitu, PM;Hruby, VJ
通讯作者:
Hruby, VJ