Cloning, purification and preliminary X-ray analysis of the C-terminal domain of Helicobacter pylori MotB

Cloning, purification and crystallization of MotB, a stator component of the proton-driven bacterial flagellar motor

MotB is an essential component of the proton motive force-driven bacterial flagellar motor. It binds to the stress-bearing layer of peptidoglycan in the periplasm, anchoring the MotA/MotB stator unit to the cell wall. Proton flow through the channel formed by the transmembrane helices of MotA and MotB generates the turning force (torque) applied to the rotor. Crystals of recombinant Helicobacte...

Antigenic and immunogenic evaluation of Helicobacter pylori FlaA epitopes

Objective(s): Helicobacter pyloriare among most common human pathogens affecting at least half of the world’s population. Mobility is one of the important primary factors in bacterial colonization and invasion. The purpose of this research is cloning, expression, and purification of FlaA protein specific epitopes in order to evaluate their antigenicity and immunogenicity. Materials and Methods:...

Crystallographic and Molecular Dynamics Analysis of Loop Motions Unmasking the Peptidoglycan-Binding Site in Stator Protein MotB of Flagellar Motor

BACKGROUND The C-terminal domain of MotB (MotB-C) shows high sequence similarity to outer membrane protein A and related peptidoglycan (PG)-binding proteins. It is believed to anchor the power-generating MotA/MotB stator unit of the bacterial flagellar motor to the peptidoglycan layer of the cell wall. We previously reported the first crystal structure of this domain and made a puzzling observa...

Cloning and Expression of the Heterogenic Vacuolating Cytotoxin From an Iranian Helicobacter pylori Strain

Expression and Antigenic Evaluation of VacA Antigenic Fragment of Helicobacter Pylori

Objective(s): Helicobacter pylori, a human specific gastric pathogen is a causative agent of chronic active gastritis. The vacuolating cytotoxin (VacA) is an effective virulence factor involved in gastric injury. The aim of this study was to construct a recombinant protein containing antigenic region of VacA gene and determine its antigenicity.   Materials and Methods: The antigenic region of V...