Parallel β-sheet secondary structure is stabilized and terminated by interstrand disulfide cross-linking.

Parallel β-sheet secondary structure is stabilized and terminated by interstrand disulfide cross-linking.
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DOI:
10.1021/ja208856c
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发表时间:
2012-01-11
影响因子:
15
通讯作者:
Gellman, Samuel H.
Gellman, Samuel H.
中科院分区:
化学1区
文献类型:
--
作者:
Almeida, Aaron M.;Li, Rebecca;Gellman, Samuel H.

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Disulfide bonds between Cys residues in adjacent strands of parallel β-sheet are rare among proteins, which suggests that parallel β-sheet structure is not stabilized by such disulfide crosslinks. We report experimental results that show, surprisingly, that an inter-strand disulfide bond can stabilize parallel β-sheet formed by an autonomously folding peptide in aqueous solution. NMR analysis reveals that parallel β-sheet structure is terminated beyond the disulfide bond, which causes deviation from the extended backbone conformation at one of the Cys residues.
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