title: Adsorption mechanism of ribosomal protein L2 onto a silica surface: a molecular dynamics simulation study.
abstract: A large-scale molecular dynamics simulation was carried out in order to investigate the adsorption mechanism of ribosomal protein L2 (RPL2) onto a silica surface at various pH values. RPL2 is a constituent protein of the 50S large ribosomal subunit, and a recent experimental report showed that it adsorbs strongly to silica surfaces and that it can be used to immobilize proteins on silica surfaces. The simulation results show that RPL2, especially domains 1 (residues 1-60) and 3 (residues 203-273), adsorbed more tightly to the silica surface above pH 7. We found that a major driving force for the adsorption of RPL2 onto the silica surface is the electrostatic interaction and that the structural flexibility of domains 1 and 3 may further contribute to the high affinity.
authors.affiliation: Faculty of Science and Engineering, Waseda University, 3-4-1 Ohkubo, Shinjuku-ku, Tokyo 169-8555, Japan. tosaka@watanabe.nano.waseda.ac.jp
authors.forename: Ryo
authors.initials: R
authors.lastname: Tosaka
authors.forename: Hideaki
authors.initials: H
authors.lastname: Yamamoto
authors.forename: Iwao
authors.initials: I
authors.lastname: Ohdomari
authors.forename: Takanobu
authors.initials: T
authors.lastname: Watanabe
mesh_terms: D000327:Adsorption; D006863:Hydrogen-Ion Concentration; D055767:Immobilized Proteins / Q000737:chemistry*; D056004:Molecular Dynamics Simulation; D018583:Pliability; D012269:Ribosomal Proteins / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry*; D055672:Static Electricity
chemical_list: D055767:Immobilized Proteins; D012269:Ribosomal Proteins; C029466:ribosomal protein L2; D012822:Silicon Dioxide