The Directed Cooperative Assembly of Proteorhodopsin into 2D and 3D Polarized Arrays
Overview
Affiliations
Proteorhodopsin is the membrane protein used by marine bacterioplankton as a light-driven proton pump. Here, we describe a rapid cooperative assembly process directed by universal electrostatic interactions that spontaneously organizes proteorhodopsin molecules into ordered arrays with well defined orientation and packing density. We demonstrate the charge density-matching mechanism that selectively controls the assembly process. The interactions among different components in the system are tuned by varying their charge densities to yield different organized transmembrane protein arrays: (i) a bacteriorhodopsin purple membrane-like structure where proteorhodopsin molecules are cooperatively arranged with charged lipids into a 2D hexagonal lattice; (ii) selected liquid-crystalline states in which crystalline lamellae made up of the coassembled proteorhodopsin and charged lipid molecules are coupled three-dimensionally with polarized proteorhodopsin orientation persisting through the macroscopic scale. Understanding this rapid electrostatically driven assembly process sheds light on organizing membrane proteins in general, which is a prerequisite for membrane protein structural and mechanistic studies as well as in vitro applications.
A natural killer cell mimic against intracellular pathogen infections.
Ge M, Ruan Z, Zhu Y, Wu W, Yang C, Lin H Sci Adv. 2024; 10(44):eadp3976.
PMID: 39475620 PMC: 11524181. DOI: 10.1126/sciadv.adp3976.
Functionally Active Membrane Proteins Incorporated in Mesostructured Silica Films.
Jahnke J, Idso M, Hussain S, Junk M, Fisher J, Phan D J Am Chem Soc. 2018; 140(11):3892-3906.
PMID: 29533066 PMC: 6040920. DOI: 10.1021/jacs.7b06863.
A Usual G-Protein-Coupled Receptor in Unusual Membranes.
Chawla U, Jiang Y, Zheng W, Kuang L, Perera S, Pitman M Angew Chem Int Ed Engl. 2015; 55(2):588-92.
PMID: 26633591 PMC: 5233722. DOI: 10.1002/anie.201508648.
Membrane proteins in their native habitat as seen by solid-state NMR spectroscopy.
Brown L, Ladizhansky V Protein Sci. 2015; 24(9):1333-46.
PMID: 25973959 PMC: 4570529. DOI: 10.1002/pro.2700.
In situ structural studies of Anabaena sensory rhodopsin in the E. coli membrane.
Ward M, Wang S, Munro R, Ritz E, Hung I, Gorkov P Biophys J. 2015; 108(7):1683-1696.
PMID: 25863060 PMC: 4390784. DOI: 10.1016/j.bpj.2015.02.018.