Elucidating changes in interfacial water structure upon protein adsorption.
نویسندگان
چکیده
A coat to fit the body: Although protein adsorption onto surfaces is a complicated process, sum-frequency generation (SFG) spectroscopy probes the interfacial water structure around a silica surface as a model protein (bovine serum albumin, BSA) adsorbs onto it from solution. At pH 8.0, the attenuated SFG intensity after BSA adsorption indicates that interfacial water molecules are less ordered due to a reduction in surface ξ-potential. The SFG spectrum shows the C-O stretching vibrations subject to stronger ([symbol: see text]≈3200 cm(-1)) and weaker (3200 cm(-1)) hydrogen bonds.
منابع مشابه
Protein adsorption at the oil/water interface: characterization of adsorption kinetics by dynamic interfacial tension measurements.
The dynamics of protein adsorption at an oil/water interface are examined over time scales ranging from seconds to several hours. The pendant drop technique is used to determine the dynamic interfacial tension of several proteins at the heptane/aqueous buffer interface. The kinetics of adsorption of these proteins are interpreted from tension/log time plots, which often display three distinct r...
متن کاملA Study on Structure and Property of Special Sulfonated Petroleum as a Complicated Anionic Surfactant
Alkaline/surfactant/polymer (ASP) flooding has been extensively applied to enhancing oil recovery. As an oil displacement agent, pe1troleum sulfonate (PS) is widely used in ASP pilot experiments. It is very important to find a petroleum sulfonate with a high interfacial activity and low adsorption loss. Anionic surfactant petroleum sulfonate is synthesized in a single-tube film sulfonation reac...
متن کاملAdsorption and conformations of lysozyme and α-lactalbumin at a water-octane interface.
As proteins contain both hydrophobic and hydrophilic amino acids, they will readily adsorb onto interfaces between water and hydrophobic fluids such as oil. This adsorption normally causes changes in the protein structure, which can result in loss of protein function and irreversible adsorption, leading to the formation of protein interfacial films. While this can be advantageous in some applic...
متن کاملTemperature-induced hydrophobic-hydrophilic transition observed by water adsorption.
The properties of nanoconfined and interfacial water in the proximity of hydrophobic surfaces play a pivotal role in a variety of important phenomena such as protein folding. Water inside single-walled carbon nanotubes (SWNTs) can provide an ideal system for investigating such nanoconfined interfacial water on hydrophobic surfaces, provided that the nanotubes can be opened without introducing e...
متن کاملInterfacial behaviour of bovine testis hyaluronidase.
The interfacial properties of bovine testicular hyaluronidase were investigated by demonstrating the association of hyaluronidase activity with membranes prepared from bovine testis. Protein adsorption to the air/water interface was investigated using surface pressure-area isotherms. In whichever way the interfacial films were obtained (protein injection or deposition), the hyaluronidase exhibi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Chemphyschem : a European journal of chemical physics and physical chemistry
دوره 2 8-9 شماره
صفحات -
تاریخ انتشار 2001