Search Results - "Viviani, Vadim"

Looking into luciferin by Viviani, Vadim R.

“…Organisms that glow are perhaps eerie. Vadim Viviani ponders on the luciferin–luciferase systems responsible for their intriguing bioluminescence…”
Get full text

Biophosphorescence in fluorescent millipedes (Diplopoda: Xystodesmidae) and its relationships with bioluminescence by Viviani, Vadim R.

“…Three types of luminescence have been reported in living organisms: bioluminescence (BL), ultraweak chemiluminescence and biofluorescence (FL). In millipedes,…”
Get full text

Enhanced beetle luciferase for high-resolution bioluminescence imaging by Nakajima, Yoshihiro, Yamazaki, Tomomi, Nishii, Shigeaki, Noguchi, Takako, Hoshino, Hideto, Niwa, Kazuki, Viviani, Vadim R, Ohmiya, Yoshihiro

“…We developed an enhanced green-emitting luciferase (ELuc) to be used as a bioluminescence imaging (BLI) probe. ELuc exhibits a light signal in mammalian cells…”
Get full text

Editorial: Bioluminescent indicators and sensors for biomedicine and environmental analysis by Viviani, Vadim R.

Get full text

Biosensing firefly luciferin synthesis in bacteria reveals a cysteine-dependent quinone detoxification route in Coleoptera by de Souza, Daniel Rangel, Silva, Jaqueline Rodrigues, Moreira, Ariele, Viviani, Vadim R.

“…Luciferin biosynthetic origin and alternative biological functions during the evolution of beetles remain unknown. We have set up a bioluminescent sensing…”
Get full text

Organization and comparative analysis of the mitochondrial genomes of bioluminescent Elateroidea (Coleoptera: Polyphaga) by Amaral, Danilo T., Mitani, Yasuo, Ohmiya, Yoshihiro, Viviani, Vadim R.

“…Mitochondrial genome organization in the Elateroidea superfamily (Coleoptera), which include the main families of bioluminescent beetles, has been poorly…”
Get full text

Role of Histidine 310 in Amydetes vivianii firefly luciferase pH and metal sensitivities and improvement of its color tuning properties by Pelentir, Gabriel F, Tomazini, Atílio, Bevilaqua, Vanessa R, Viviani, Vadim R

“…Firefly luciferases emit yellow-green light and are pH-sensitive, changing the bioluminescence color to red in the presence of heavy metals, acidic pH and high…”
Get more information

Bioluminescence Color-Tuning Firefly Luciferases: Engineering and Prospects for Real-Time Intracellular pH Imaging and Heavy Metal Biosensing by Viviani, Vadim R, Pelentir, Gabriel F, Bevilaqua, Vanessa R

“…Firefly luciferases catalyze the efficient production of yellow-green light under normal physiological conditions, having been extensively used for…”
Get full text

Spectroscopic Properties of Amine‐substituted Analogues of Firefly Luciferin and Oxyluciferin by Kakiuchi, Michio, Ito, Soichiro, Yamaji, Minoru, Viviani, Vadim R., Maki, Shojiro, Hirano, Takashi

“…Spectroscopic and photophysical properties of firefly luciferin and oxyluciferin analogues with an amine substituent (NH2, NHMe and NMe2) at the C6' position…”
Get full text

Author Correction: A new brilliantly blue-emitting luciferin-luciferase system from Orfelia fultoni and Keroplatinae (Diptera) by Viviani, Vadim R., Silva, Jaqueline R., Amaral, Danilo T., Bevilaqua, Vanessa R., Abdalla, Fabio C., Branchini, Bruce R., Johnson, Carl H.

Get full text

Effect of pH on the secondary structure and thermostability of beetle luciferases: structural origin of pH-insensitivity by Tomazini, Atílio, Carvalho, Mariele, Murakami, Mario T, Viviani, Vadim R

“…Beetle luciferases were classified into three functional groups: (1) pH-sensitive yellow-green-emitting (fireflies) which change the bioluminescence color to…”
Get more information

A Very Bright Far-Red Bioluminescence Emitting Combination Based on Engineered Railroad Worm Luciferase and 6'-Amino-Analogs for Bioimaging Purposes by Viviani, Vadim R, Bevilaqua, Vanessa R, de Souza, Daniel R, Pelentir, Gabriel F, Kakiuchi, Michio, Hirano, Takashi

“…Beetle luciferases produce bioluminescence (BL) colors ranging from green to red, having been extensively used for many bioanalytical purposes, including…”
Get full text

Comparison of the thermostability of recombinant luciferases from Brazilian bioluminescent beetles: Relationship with kinetics and bioluminescence colours by Oliveira, Gabriela, Viviani, Vadim R.

“…Firefly luciferases have been used extensively as bioanalytical reagents and their cDNAs as reporter genes for biosensors and bioimaging, but they are in…”
Get full text

The proton and metal binding sites responsible for the pH-dependent green-red bioluminescence color tuning in firefly luciferases by Viviani, Vadim R., Gabriel, Gabriele V. M., Bevilaqua, Vanessa R., Simões, A. F., Hirano, T., Lopes-de-Oliveira, P. S.

“…Firefly luciferases produce yellow-green light under physiological and alkaline conditions, however at acidic pH, higher temperatures or in the presence of…”
Get full text

Circadian Control Sheds Light on Fungal Bioluminescence by Oliveira, Anderson G., Stevani, Cassius V., Waldenmaier, Hans E., Viviani, Vadim, Emerson, Jillian M., Loros, Jennifer J., Dunlap, Jay C.

“…Bioluminescence, the creation and emission of light by organisms, affords insight into the lives of organisms doing it. Luminous living things are widespread…”
Get full text

A new brilliantly blue-emitting luciferin-luciferase system from Orfelia fultoni and Keroplatinae (Diptera) by Viviani, Vadim R., Silva, Jaqueline R., Amaral, Danilo T., Bevilaqua, Vanessa R., Abdalla, Fabio C., Branchini, Bruce R., Johnson, Carl H.

“…Larvae of O. fultoni (Keroplatidae: Keroplatinae), which occur along river banks in the Appalachian Mountains in Eastern United States, produce the bluest…”
Get full text

Bioluminescence of Beetle Luciferases with 6′-Amino‑d‑luciferin Analogues Reveals Excited Keto-oxyluciferin as the Emitter and Phenolate/Luciferin Binding Site Interactions Modulate Bioluminescence Colors by Viviani, Vadim R, Neves, Deimison Rodrigues, Amaral, Danilo Trabuco, Prado, Rogilene A, Matsuhashi, Takuto, Hirano, Takashi

“…Beetle luciferases produce different bioluminescence colors from green to red using the same d-luciferin substrate. Despite many studies of the mechanisms and…”
Get full text

Inventory and ecological aspects of bioluminescent beetles in the Cerrado ecosystem and its decline around Emas National Park (Brazil) by Viviani, Vadim R., Rosa, Simone P., Prado, Rogilene A., Pelentir, Gabriel F., Souza, Daniel R. de, Reis, Raone M., Bechara, E.J.H., Costa, C.

“…Among the richest ecosystems in bioluminescent Coleoptera in Brazil, the Cerrado (savannas) is the most threatened one by agricultural expansion. The Emas…”
Get full text

Engineering the metal sensitive sites in Macrolampis sp2 firefly luciferase and use as a novel bioluminescent ratiometric biosensor for heavy metals by Gabriel, Gabriele V. M., Viviani, Vadim R.

“…Most luminescent biosensors for heavy metals are fluorescent and rely on intensity measurements, whereas a few are ratiometric and rely on spectral changes…”
Get full text

A Novel Brighter Bioluminescent Fusion Protein Based on ZZ Domain and Amydetes vivianii Firefly Luciferase for Immunoassays by Viviani, Vadim R., Silva, Jaqueline Rodrigues, Ho, Paulo Lee

“…Immunoassays are widely used for detection of antibodies against specific antigens in diagnosis, as well as in electrophoretic techniques such as Western…”
Get full text