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  • A generalized strategy for immobilizing uniformly oriented membrane proteins at solid interfaces.

A generalized strategy for immobilizing uniformly oriented membrane proteins at solid interfaces.

Chemical communications (Cambridge, England) (2013-02-26)
Amit Vaish, Vitalii Silin, Marlon L Walker, Kristen L Steffens, Susan Krueger, Alexei A Yeliseev, Klaus Gawrisch, David J Vanderah
ABSTRACT

We have developed a method based on self-assembly of thiols on Au substrates to immobilize membrane proteins at interfaces. Using water soluble nitrilotriacetic acid (NTA)-terminated oligo(ethylene glycol) thiols, a histidine-tagged G protein-coupled membrane receptor (GPCR) was captured in a defined orientation with little nonspecific binding.

MATERIALS
Product Number
Brand
Product Description

Supelco
Ethylene glycol, Pharmaceutical Secondary Standard; Certified Reference Material
Supelco
Ethylene glycol solution, suitable for NMR (reference standard), 80% in DMSO-d6 (99.9 atom % D), NMR tube size 5 mm × 8 in.
Sigma-Aldrich
Nitrilotriacetic acid, BioUltra, ≥99.0% (T)
Sigma-Aldrich
Nitrilotriacetic acid, ACS reagent, ≥99.0%
Sigma-Aldrich
Ethylene glycol, anhydrous, 99.8%
Sigma-Aldrich
Ethylene glycol, BioUltra, ≥99.5% (GC)
Supelco
Ethylene glycol, analytical standard
Sigma-Aldrich
Nitrilotriacetic acid, Sigma Grade, ≥99%
Sigma-Aldrich
Ethylene glycol, ReagentPlus®, ≥99%
Sigma-Aldrich
Ethylene glycol, spectrophotometric grade, ≥99%
Sigma-Aldrich
Ethylene glycol, Vetec, reagent grade, 98%
Sigma-Aldrich
Ethylene glycol 5 M solution