INFLUENCE OF ENERGY TRANSFER ON THE PHOTOIONIZATION OF TRYPTOPHAN AND TYROSINE IN BASIC MEDIA †
@article{Santus1972INFLUENCEOE,
title={INFLUENCE OF ENERGY TRANSFER ON THE PHOTOIONIZATION OF TRYPTOPHAN AND TYROSINE IN BASIC MEDIA †},
author={Rene C. Santus and Marc Bazin and M. Aubailly and R Guermonprez},
journal={Photochemistry and Photobiology},
year={1972},
volume={15}
}Abstract— The luminescence studies of the delayed isothermal and light stimulated recombinations of photoejected electrons with photoionized chromophores at 77°K show that in the peptide tryptophyltyrosine, where energy transfer occurs at the singlet level from tryptophan to tyrosine and at the triplet level from tyrosine to tryptophan, tryptophan photoionization is greatly enhanced. This increase in photoionization efficiency is attributed to triplet‐triplet transfer.
9 Citations
Factors affecting the luminescence of tryptophan at 77 K.
- ChemistryBiochimica et biophysica acta
- 1976
FLASH PHOTOLYSIS OF AQUEOUS TRYPTOPHAN, ALANYL TRYPTOPHAN AND TRYPTOPHYL ALANINE
- Chemistry, PhysicsPhotochemistry and photobiology
- 1976
Abstract— Tryptophan has been flash photolysed in deoxygenated and air equilibrated solutions. The kinetics of the subsequent reactions of the tryptophyl radical and the hydrated electron have been…
THE PHOTOLYSIS OF TRYPTOPHAN IN THE PRESENCE OF OXYGEN
- PhysicsPhotochemistry and photobiology
- 1973
Oxygen is playing a major role in the photochemical decomposition and it is proposed that the major reaction which occurs, under normal atmospheric conditions, is the reaction of the lowest triplet excited state of tryptophan with oxygen.
Effect of amino group charge on the photooxidation kinetics of aromatic amino acids.
- ChemistryThe journal of physical chemistry. A
- 2014
It has been established that the presence of charged amino group changes oxidation rates by a significant factor; i.e., His with a positively charge amino group quenches the TCBP triplets 5 times more effectively than N-AcHis and His withA neutral amino group.
THE PHOTOLYSIS RATES OF SOME DI‐ AND TRIPEPTIDES OF TRYPTOPHAN
- Chemistry, Biology
- 1980
The products appeared to differ greatly among the various peptides studied; Trp,trp‐Gly, and Trp‐Leu gave oxidation products, while Gly‐Trp and Leu‐TrP apparently gave ring closure products, not requiring oxygen.
SPIN‐TRAPPING and ESR STUDIES OF THE DIRECT PHOTOLYSIS OF AROMATIC AMINO ACIDS, DIPEPTIDES, TRIPEPTIDES and POLYPEPTIDES IN AQUEOUS SOLUTIONS—III. TRYPTOPHAN and RELATED COMPOUNDS
- Chemistry
- 1981
Abstract— The UV photolysis of tryptophan (Trp) and Trp‐containing peptides in aerated aqueous solutions has been studied by ESR and spin‐trapping techniques using f‐nitrosobutane as the spin‐trap.…
Free radical initiation in proteins and amino acids by ionizing and ultraviolet radiations and lipid oxidation--Part 22: ultraviolet radiation and photolysis.
- Chemistry, Biology
- 1980
This review is a detailed comparison of gamma radiation, UV radiation, and lipid oxidation for what is presently known concerning the specific modes of energy deposition and free radical formation, the free radicals formed in proteins and amino acids, and the typical damage correlating with these radicals.
Ultraviolet Radiation Effects on the Human Eye
- Medicine
- 1977
This chapter comprehensively cover what is known about UV radiation damage to all ocular tissues and studies the question of UV radiation-induced aging or damage to the retina, perhaps one of the most exciting new directions in ophthalmology and human biology research.
References
SHOWING 1-10 OF 13 REFERENCES
ELECTRON SPIN RESONANCE OF TRIPLET STATES AND FREE RADICALS APPEARING IN PORPHYRINS, AROMATIC AMINO‐ACIDS AND PROTEINS UNDER THE EFFECT OF LIGHT
- Chemistry, Physics
- 1966
Abstract— The electron paramagnetic resonance (EPR) of the triplet excited state of solutions of a series of porphyrins and aromatic amino‐acids has been studied at 77°K. It has been shown that for…
Photochemical Generation of the Hydrated Electron
- ChemistryScience
- 1963
A transient species with properties similar to the hydrated electron produced previously by electron irradiation has been observed by flash photolysis of aqueous solutions of inorganic salts and…
On the Nature of Stimulated Emission in Rigid Organic Solutions
- Chemistry
- 1965
A dilute solution of an aromatic amine in a saturated hydrocarbon is frozen to a rigid state in liquid nitrogen and irradiated with ultraviolet light in the absorption band of the amine. The amine…
Long‐Lifetime Phosphorescence and the Diffusion Process
- Physics
- 1952
The long‐lifetime phosphorescence of certain, easily oxidizable organic compounds in rigid media at the temperature of liquid nitrogen has been found to decay by an inverse power function of the…
PHOTOCHEMICAL REACTIONS IN AMINO ACID RESIDUES AND INACTIVATION OF ENZYMES DURING U.V.‐IRRADIATION. A REVIEW
- BiologyPhotochemistry and photobiology
- 1970
It was found by different methods that the effective destruction of cystine, trypsin, tryptophan as well as tyrosine and phenylalanine and Phenylalanines occurs on u.v.-irradiation of proteins, which means that those groups which absorb light energy are the ones mainly photolyzed on the u.V.v.'s of proteins.
ETUDE PAR RESONANCE PARAMAGNETIQUE ELECTRONIQUE ET PAR SPECTROPHOTOMETRIE D'ABSORPTION DES PROCESSUS PRIMAIRES DANS LA PHOTOCHIMIE DE SOLUTIONS AQUEUSES CONGELEES A 77°K D'ACIDES AMINES AROMATIQUES ET DE POLYPEPTIDES *
- Physics, Chemistry
- 1968
Abstract— Neutral, acidic or basic frozen aqueous solutions of aromatic amino acids undergo photoionisation under u.v. irradiation, at 77°K. In neutral or basic solutions, photo‐ejected electrons are…
Fluorescence-polarization spectrum and electronic-energy transfer in tyrosine, tryptophan and related compounds.
- Biology, Computer ScienceThe Biochemical journal
- 1960
It is shown here how to identify the Na6(CO3(SO4)2(SO3)2, Na2SO4, and Na2CO3 (Na2CO4) deposits in the Na2O2 mixture using a simple, straightforward, and inexpensive apparatus.
Conformations and interactions of excited states. II. Polystyrene, polypeptides, and proteins
- Materials ScienceBiopolymers
- 1966
It is concluded that at room temperature absorption of light can cause local “melting” of regular structures and thus, in some polymers, permit the attainment of a face‐to‐face arrangement of aromatic rings within the radiative lifetime of their excited singlet states.