Preliminary characterization of a light-rare-earth-element-binding peptide of a natural perennial fern <Emphasis Type="Italic"> Dicranopteris dichotoma</Emphasis> |
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Authors: | Haiou?Wang Email author" target="_blank">Xiao-quan?ShanEmail author Shuzhen?Zhang Bei?Wen |
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Institution: | Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, 100085, Beijing, China. |
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Abstract: | A light-rare-earth-element (LREE)-binding peptide was isolated from LREE hyperaccumulator Dicranopteris dichotomaleaves and characterized in terms of molecular weight and ultraviolet absorption spectrum. The molecular weight of the LREE-binding peptide was determined to be 2208 Da by matrix-assisted laser-desorption ionization-time of flight mass spectrometry (MALDI-TOFMS). The characteristic ultraviolet absorption spectrum of the peptide was observed at 220-300 nm, suggesting that the peptide chain contained aromatic amino acids. Compared to the unique features of the phytochelatins with a low absorption at 280 nm, the LREE-binding peptide is unlikely to be a typical phytochelatin. The present study suggests that the LREE-binding peptide is probably a natural peptide in D. dichotoma, and it may play an important role in hyperaccumulation of LREEs. |
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