Investigation of Cyc1 protein structure stability after H53I mutation using computational approaches to improve redox potential

Shojapour, Mahnaz; Fatemi, Faezeh; Farahmand, Somayeh; Shasaltaneh, Marzieh Dehghan

doi:10.1016/j.jmgm.2021.107864

Cited by 5 publications

(1 citation statement)

References 36 publications

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“…Variations in the secondary structure of the protein during the simulations are shown in Figure 4 . The aim of DSSP analysis is to measure the number of amino acids involved in the different secondary structures of the peptides as a function of time [ 37 ]. The secondary structure of VNAVLH is mainly composed of coils, bends, and turns, while that of VNAVL is mainly composed of coils and turns.…”

Section: Resultsmentioning

confidence: 99%

C-Terminal Modification on the Immunomodulatory Activity, Antioxidant Activity, and Structure–Activity Relationship of Pulsed Electric Field (PEF)-Treated Pine Nut Peptide

Zhang

Liu

Bao

et al. 2022

Foods

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In this study, a novel peptide VNAVL was synthesized by removing the C-terminal histidine on the basis of a bioactive peptide VNAVLH obtained from pine nut (Pinus koraiensis Sieb. et Zucc) protein. The effects of removing histidine on antioxidant activity, immunomodulatory activity, and secondary structure of the PEF-treated peptide were discussed. Compared with VNAVLH, VNAVL only exhibited lower antioxidant activity, but no immunomodulatory activity to release TNF-α, IL-6, and NO by activating RAW 264.7 cells. In addition, both antioxidant and immune activities of VNAVLH were significantly more sensitive to treatment with 40 kV/cm than other field intensities, whereas VNAVL was not sensitive to field strength changes. CD spectra and DSSP analysis verified that both peptides consisted of a β structure and random coil, but the ability of VNAVL to transform the random coil via PEF treatment is weaker than that of VNAVLH. Therefore, PEF treatment might expose the key active site located on the C-terminal histidine by altering the secondary structure of the peptide.

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Section: Resultsmentioning

confidence: 99%