Nanosecond Fluorescence Dynamic Stokes Shift of Tryptophan in a Protein Matrix

Michel Vincent; Anne-Marie Gilles; Inès M. Li de la Sierra; Pierre Briozzo; Octavian Bârzu; Jacques Gallay

doi:10.1021/jp000638x

An Ultra-Structural Study of Human Melanoma in Vivo and Vitro

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100091275 ◽

1976 ◽

Vol 34 ◽

pp. 258-259

Author(s):

James R. Gaylor ◽

Fredda Schafer ◽

Robert E. Nordquist

Keyword(s):

Endoplasmic Reticulum ◽

Golgi Apparatus ◽

Protein Aggregation ◽

Structural Study ◽

Human Melanoma ◽

Protein Matrix ◽

Early Form ◽

Endoplasmic Reticulum Protein ◽

Mitochondrial Origin

Several theories on the origin of the melanosome exist. These include the Golgi origin theory, in which a tyrosinase-rich protein is "packaged" by the Golgi apparatus, thus forming the early form of the melanosome. A second theory postulates a mitochondrial origin of melanosomes. Its author contends that the melanosome is a modified mitochondria which acquires melanin during its development. A third theory states that a pre-melanosome is formed in the smooth or rough endoplasmic reticulum. Protein aggregation is suggested by one author as a possible source of the melanosome. This fourth theory postulates that the melanosome originates when the protein products of several genetic loci aggregate in the cytoplasm of the melanocyte. It is this protein matrix on which the melanin is deposited. It was with these theories in mind that this project was undertaken.

Identification of a baculovirus polyhedron formation mutant with a novel phenotype

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100166440 ◽

1996 ◽

Vol 54 ◽

pp. 796-797

Author(s):

James M. Slavicek ◽

Melissa J. Mercer ◽

Mary Ellen Kelly

Keyword(s):

Viral Gene ◽

Gene Products ◽

Type Number ◽

Infection Cycle ◽

Wild Type ◽

Protein Matrix ◽

Insect Midgut ◽

Viral Particles ◽

Budded Virus ◽

Viral Form

Nucleopolyhedroviruses (NPV, family Baculoviridae) produce two morphological forms, a budded virus form and a viral form that is occluded into a paracrystalline protein matrix. This structure is termed a polyhedron and is composed primarily of the protein polyhedrin. Insects are infected by NPVs after ingestion of the polyhedron and release of the occluded virions through dissolution of the polyhedron in the alkaline environment of the insect midgut. Early after infection the budded virus form is produced. It buds through the plasma membrane and then infects other cells. Later in the infection cycle the occluded form of the virus is generated (reviewed by Blissard and Rohrmann, 1990).The processes of polyhedron formation and virion occlusion are likely to involve a number of viral gene products. However, only two genes, the polyhedrin gene and 25K FP gene, have been identified to date that are necessary for the wild type number of polyhedra to be formed and viral particles occluded.

Intrinsic doping limit and defect-assisted luminescence in Cs4PbBr6

10.26434/chemrxiv.7629467.v3 ◽

2019 ◽

Author(s):

Young-Kwang Jung ◽

Joaquin Calbo ◽

Ji-Sang Park ◽

Lucy D. Wahlley ◽

Sunghyun Kim ◽

...

Keyword(s):

First Principles ◽

Room Temperature ◽

Stokes Shift ◽

Green Luminescence ◽

Counter Ions ◽

Self Consistent ◽

Deep Ultraviolet ◽

Halide Perovskite ◽

Related Compounds ◽

Level Analysis

Cs4PbBr6 is a member of the halide perovskite family that is built from isolated (zero-dimensional) PbBr64- octahedra with Cs+ counter ions. The material exhibits anomalous optoelectronic properties: optical absorption and weak emission in the deep ultraviolet (310 - 375 nm) with efficient luminescence in the green region (~ 540 nm). Several hypotheses have been proposed to explain the giant Stokes shift including: (i) phase impurities; (ii) self-trapped exciton; (iii) defect emission. We explore, using first-principles theory and self-consistent Fermi level analysis, the unusual defect chemistry and physics of Cs4PbBr6. We find a heavily compensated system where the room-temperature carrier concentrations (< 109 cm-3) are more than one million times lower than the defect concentrations. We show that the low-energy Br-on-Cs antisite results in the formation of a polybromide (Br3) species that can exist in a range of charge states. We further demonstrate from excited-state calculations that tribromide moieties are photoresponsive and can contribute to the observed green luminescence. Photoactivity of polyhalide molecules is expected to be present in other halide perovskite-related compounds where they can influence light absorption and emission.

Intrinsic doping limit and defect-assisted luminescence in Cs4PbBr6

10.26434/chemrxiv.7629467 ◽

2019 ◽

Cited By ~ 1

Author(s):

Young-Kwang Jung ◽

Joaquin Calbo ◽

Ji-Sang Park ◽

Lucy D. Wahlley ◽

Sunghyun Kim ◽

...

Keyword(s):

First Principles ◽

Room Temperature ◽

Stokes Shift ◽

Green Luminescence ◽

Counter Ions ◽

Self Consistent ◽

Deep Ultraviolet ◽

Halide Perovskite ◽

Related Compounds ◽

Level Analysis

Cs4PbBr6 is a member of the halide perovskite family that is built from isolated (zero-dimensional) PbBr64- octahedra with Cs+ counter ions. The material exhibits anomalous optoelectronic properties: optical absorption and weak emission in the deep ultraviolet (310 - 375 nm) with efficient luminescence in the green region (~ 540 nm). Several hypotheses have been proposed to explain the giant Stokes shift including: (i) phase impurities; (ii) self-trapped exciton; (iii) defect emission. We explore, using first-principles theory and self-consistent Fermi level analysis, the unusual defect chemistry and physics of Cs4PbBr6. We find a heavily compensated system where the room-temperature carrier concentrations (< 109 cm-3) are more than one million times lower than the defect concentrations. We show that the low-energy Br-on-Cs antisite results in the formation of a polybromide (Br3) species that can exist in a range of charge states. We further demonstrate from excited-state calculations that tribromide moieties are photoresponsive and can contribute to the observed green luminescence. Photoactivity of polyhalide molecules is expected to be present in other halide perovskite-related compounds where they can influence light absorption and emission.

Faculty Opinions recommendation of An orange fluorescent protein with a large Stokes shift for single-excitation multicolor FCCS and FRET imaging.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.715697909.791202814 ◽

2012 ◽

Author(s):

Jacques Neefjes ◽

Malgorzata Garstka

Keyword(s):

Fluorescent Protein ◽

Stokes Shift ◽

Large Stokes Shift ◽

Orange Fluorescent Protein

Enhanced Multiplexing of Immunofluorescence Microscopy Using a Long‐Stokes‐Shift Fluorophore

Current Protocols ◽

10.1002/cpz1.214 ◽

2021 ◽

Vol 1 (8) ◽

Author(s):

Sydney J. Reitz ◽

Andrew D. Sauerbeck ◽

Terrance T. Kummer

Keyword(s):

Immunofluorescence Microscopy ◽

Stokes Shift

A phenanthrene[9,10-d]imidazole-phenol-based fluorescent probe combined ESIPT and AIE for “turn-on” detection of Cu2+ with a green-emitting and improved stokes shift and its application

New Journal of Chemistry ◽

10.1039/d1nj02177j ◽

2021 ◽

Author(s):

Jiahui Du ◽

Bing Zhao ◽

Wei Kan ◽

Haochun Yin ◽

Tianshu Song ◽

...

Keyword(s):

Fluorescent Probe ◽

Stokes Shift ◽

Fluorescent Sensors ◽

Turn On ◽

Highly Sensitive

Development of highly sensitive and selective fluorescent sensors toward Cu2+ has gained considerable attention in view of its application of environmental and biological fields. However, the strategy of sensing by...

Corrigendum to “A Schiff base-based ratiometric chemosensor conjugated NBD derivative with the large Stokes shift for formaldehyde detection” [Tetrahedron 76 (2020) 131411]

Tetrahedron ◽

10.1016/j.tet.2021.132139 ◽

2021 ◽

pp. 132139

Author(s):

Kanokorn Wechakorn ◽

Saichon Supalang ◽

Supattra Suanpai

Keyword(s):

Schiff Base ◽

Stokes Shift ◽

Large Stokes Shift

A sensitive bio-probe for tracking lipid droplets with large Stokes shift and its application in cell imaging

Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy ◽

10.1016/j.saa.2021.119988 ◽

2021 ◽

pp. 119988

Author(s):

Yizhe Yan ◽

Shaoqing Li ◽

Zhi-Hao Zhang ◽

Jianbo Qu ◽

Jian-Yong Wang

Keyword(s):

Lipid Droplets ◽

Cell Imaging ◽

Stokes Shift ◽

Large Stokes Shift

A novel near-infrared fluorescent probe based on isophorone for the bioassay of endogenous cysteine

Organic & Biomolecular Chemistry ◽

10.1039/d0ob02405h ◽

2021 ◽

Author(s):

Hong-Bo Liu ◽

Hai Xu ◽

Xin Guo ◽

Jian Xiao ◽

Zheng-Hong Cai ◽

...

Keyword(s):

Aqueous Solution ◽

Fluorescent Probe ◽

Near Infrared ◽

Stokes Shift ◽

Rapid Identification ◽

Large Stokes Shift

A near-infrared (NIR) fluorescent probe with a large Stokes shift (143 nm) for the rapid identification of Cys over Hcy and GSH in aqueous solution was developed.