Abstract

Previously we investigated the effects of membrane-spanning peptides L24 with a sequence KKL24KK and LA12 with a sequence KK(LA)12KK on POPC membranes. We used PC-spin labels with nitroxide moiety located at the 5-, 7-, 10-, 12-, and 16-positions Both peptides ordered the lipid bilayer, decreased motional freedom of alkyl chains, and significantly increased the hydrophobicity of the membrane interior. This year we confirmed our previous results by studying the accessibility of ferricyanide ion dissolved in water into POPC-peptide membranes. In the presence of peptide the level of penetration of ferricyanide decreased significantly. These results obtained in fluid-phase membranes are consistent with previously obtained at -150C hydrophobicity profiles. Our studies give insight to protein-protein interaction in the membrane, and folding of membrane proteins in the membrane as they relate to the peptide structure, surface roughness, and structural conformability of two peptide drains or of a peptide and lipid when they are adjacently placed in the membrane. ?

  Funding Agency

Agency
National Institute of Health (NIH)
Institute
National Center for Research Resources (NCRR)
Type
Biotechnology Resource Grants (P41)
Project #
5P41RR001008-23
Application #
6279874
Study Section
Project Start
1998-04-01
Project End
1999-02-28
Budget Start
1997-10-01
Budget End
1998-09-30
Support Year
23
Fiscal Year
1998
Total Cost
Indirect Cost

  Institution

Name
Medical College of Wisconsin
Department
Type
DUNS #
073134603
City
Milwaukee
State
WI
Country
United States
Zip Code
53226

  Publications

Mao, Li; Liu, Yu-Xiang; Huang, Chun-Hua et al. (2015) Intrinsic Chemiluminescence Generation during Advanced Oxidation of Persistent Halogenated Aromatic Carcinogens. Environ Sci Technol 49:7940-7
Shan, Guo-Qiang; Yu, Ao; Zhao, Chuan-Fang et al. (2015) A combined experimental and computational investigation on the unusual molecular mechanism of the Lossen rearrangement reaction activated by carcinogenic halogenated quinones. J Org Chem 80:180-9
Li, Yan; Huang, Chun-Hua; Liu, Yu-Xiang et al. (2014) Detoxifying polyhalogenated catechols through a copper-chelating agent by forming stable and redox-inactive hydrogen-bonded complexes with an unusual perpendicular structure. Chemistry 20:13028-33
Qin, Hao; Huang, Chun-Hua; Mao, Li et al. (2013) Molecular mechanism of metal-independent decomposition of lipid hydroperoxide 13-HPODE by halogenated quinoid carcinogens. Free Radic Biol Med 63:459-66
Huang, Chun-Hua; Shan, Guo-Qiang; Mao, Li et al. (2013) The first purification and unequivocal characterization of the radical form of the carbon-centered quinone ketoxy radical adduct. Chem Commun (Camb) 49:6436-8
Sheng, Zhi-Guo; Huang, Wei; Liu, Yu-Xiang et al. (2013) Ofloxacin induces apoptosis via ?1 integrin-EGFR-Rac1-Nox2 pathway in microencapsulated chondrocytes. Toxicol Appl Pharmacol 267:74-87
Sheng, Zhi-Guo; Huang, Wei; Liu, Yu-Xiang et al. (2013) Bisphenol A at a low concentration boosts mouse spermatogonial cell proliferation by inducing the G protein-coupled receptor 30 expression. Toxicol Appl Pharmacol 267:88-94
Shao, Jie; Huang, Chun-Hua; Kalyanaraman, Balaraman et al. (2013) Potent methyl oxidation of 5-methyl-2'-deoxycytidine by halogenated quinoid carcinogens and hydrogen peroxide via a metal-independent mechanism. Free Radic Biol Med 60:177-82
Sheng, Zhi-Guo; Li, Yan; Fan, Rui-Mei et al. (2013) Lethal synergism between organic and inorganic wood preservatives via formation of an unusual lipophilic ternary complex. Toxicol Appl Pharmacol 266:335-44
Liddle, Brendan J; Wanniarachchi, Sarath; Hewage, Jeewantha S et al. (2012) Electronic communication across diamagnetic metal bridges: a homoleptic gallium(III) complex of a redox-active diarylamido-based ligand and its oxidized derivatives. Inorg Chem 51:12720-8

Showing the most recent 10 out of 368 publications