Evaluation of diverse α/β-backbone patterns for functional α-helix mimicry: analogues of the Bim BH3 domain.
Evaluation of diverse α/β-backbone patterns for functional α-helix mimicry: analogues of the Bim BH3 domain.
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DOI:
10.1021/ja207148m
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发表时间:
2012-01-11
影响因子:
15
通讯作者:
Gellman, Samuel H.
中科院分区:
文献类型:
--
作者:
Boersma, Melissa D.;Haase, Holly S.;Peterson-Kaufman, Kimberly J.;Lee, Erinna F.;Clarke, Oliver B.;Colman, Peter M.;Smith, Brian J.;Horne, W. Seth;Fairlie, W. Douglas;Gellman, Samuel H.
Peptidic oligomers that contain both α- and β-amino acid residues, in regular patterns throughout the backbone, are emerging as structural mimics of α-helix-forming conventional peptides (composed exclusively of α-amino acid residues). Here we describe a comprehensive evaluation of diverse α/β-peptide homologues of the Bim BH3 domain in terms of their ability to bind to the BH3-recognition sites on two partner proteins, Bcl-xL and Mcl-1. These proteins are members of the anti-apoptotic Bcl-2 family, and both bind tightly to the Bim BH3 domain itself. All α/β-peptide homologues retain the side chain sequence of the Bim BH3 domain, but each homologue contains periodic α-residue → β3-residue substitutions. Previous work has shown that the ααβαααβ pattern, which aligns the β3-residues in a 'stripe' along one side of the helix, can support functional α-helix mimicry, and the results reported here support this conclusion. The present study provides the first evaluation of functional mimicry by ααβ and αααβ patterns, which cause the β3-residues to spiral around the helix periphery. We find that the αααβ pattern can support effective mimicry of the Bim BH3 domain, as manifested by the crystal structure of an α/β-peptide bound to Bcl-xL, affinity for a variety of Bcl-2 family proteins, and induction of apoptotic signaling in mouse embryonic fibroblast extracts. The best αααβ homologue shows substantial protection from proteolytic degradation relative to the Bim BH3 α-peptide.
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影响因子:
4
作者:
Buhrlage, Sara J.;Bates, Caleb A.;Rowe, Steven P.;Minter, Aaron R.;Brennan, Brian B.;Majmudar, Chinmay Y.;Wemmer, David E.;Al-Hashimi, Hashim;Mapp, Anna K.
通讯作者:
Mapp, Anna K.
DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
Emsley, P;Cowtan, K
通讯作者:
Cowtan, K
影响因子:
15
作者:
Hara, T;Durell, SR;Appella, DH
通讯作者:
Appella, DH
DOI:
10.1073/pnas.0701297104
发表时间:
2007-04-10
影响因子:
11.1
作者:
Czabotar, Peter E.;Lee, Erinna F.;Colman, Peter M.
通讯作者:
Colman, Peter M.
影响因子:
50.3
作者:
Certo, Michael;Moore, Victoria Del Gaizo;Letai, Anthony
通讯作者:
Letai, Anthony