The Lumio reagent is hydrophobic and can easily pass through the membrane. There is no need to permeabilize the membrane in order to get this reagent into cells.
Dynamic fluorescent imaging of human immunodeficiency virus type 1 gag in live cells by biarsenical labeling.
Authors:Rudner L, Nydegger S, Coren LV, Nagashima K, Thali M, Ott DE,
Journal:J Virol
PubMed ID:15767407
'Human immunodeficiency virus type 1 (HIV-1) Gag is the primary structural protein of the virus and is sufficient for particle formation. We utilized the recently developed biarsenical-labeling method to dynamically observe HIV-1 Gag within live cells by adding a tetracysteine tag (C-C-P-G-C-C) to the C terminus of Gag in both ... More
Stimulation of hepatitis C virus (HCV) nonstructural protein 3 (NS3) helicase activity by the NS3 protease domain and by HCV RNA-dependent RNA polymerase.
Authors:Zhang C, Cai Z, Kim YC, Kumar R, Yuan F, Shi PY, Kao C, Luo G,
Journal:J Virol
PubMed ID:15994762
'Hepatitis C virus (HCV) nonstructural protein 3 (NS3) possesses multiple enzyme activities. The N-terminal one-third of NS3 primarily functions as a serine protease, while the remaining two-thirds of NS3 serve as a helicase and nucleoside triphosphatase. Whether the multiple enzyme activities of NS3 are functionally interdependent and/or modulated by other ... More
Monitoring protein stability and aggregation in vivo by real-time fluorescent labeling.
Authors:Ignatova Z, Gierasch LM,
Journal:Proc Natl Acad Sci U S A
PubMed ID:14701904
'In vivo fluorescent labeling of an expressed protein has enabled the observation of its stability and aggregation directly in bacterial cells. Mammalian cellular retinoic acid-binding protein I (CRABP I) was mutated to incorporate in a surface-exposed omega loop the sequence Cys-Cys-Gly-Pro-Cys-Cys, which binds specifically to a biarsenical fluorescein dye (FlAsH). ... More
Multicolor and electron microscopic imaging of connexin trafficking.
Authors: Gaietta Guido; Deerinck Thomas J; Adams Stephen R; Bouwer James; Tour Oded; Laird Dale W; Sosinsky Gina E; Tsien Roger Y; Ellisman Mark H;
Journal:Science
PubMed ID:11964472
'Recombinant proteins containing tetracysteine tags can be successively labeled in living cells with different colors of biarsenical fluorophores so that older and younger protein molecules can be sharply distinguished by both fluorescence and electron microscopy. Here we used this approach to show that newly synthesized connexin43 was transported predominantly in ... More
Visualization of mRNA translation in living cells.
The role of mRNA localization is presumably to effect cell asymmetry by synthesizing proteins in specific cellular compartments. However, protein synthesis has never been directly demonstrated at the sites of mRNA localization. To address this, we developed a live cell method for imaging translation of beta-actin mRNA. Constructs coding for ... More