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Light-Induced Liposomal Drug Delivery with an Amphiphilic Porphyrin and Its Chlorin and Bacteriochlorin Analogues.
Mol Pharm
February 2024
Institute of Biomedical Optics, University of Lübeck, Peter-Monnik-Weg 4, Lübeck 23562, Germany.
The development of targeted drug delivery mechanisms in the human body is a matter of growing interest in medical science. The selective release of therapeutic agents at a specific target site can increase the therapeutical efficiency and at the same time reduce the side effects. Light-sensitive liposomes can release a drug by an externally controlled light trigger.
View Article and Find Full Text PDFChlorophyll Synthesis in by Chlorophyll Synthase of .
Biology (Basel)
April 2023
Microbial Research Department, Nakdonggang National Institute of Biological Resources, Sangju 37242, Republic of Korea.
The production of phytylated chlorophyll (Chl ) in , which uses phytylated bacteriochlorophyll (BChl ), is the first step in expanding the light absorption spectra. Unlike the chlorophyll synthase (ChlG) of the sp. PCC6803, ChlGs of angiosperms, including , , , and , showed bacteriochlorophyll synthase activity and resistance to inhibition by bacteriochlorophyllide (BChlide ), geranylgeranylated BChl (BChl ), and BChl , collectively called bacteriochlorins.
View Article and Find Full Text PDFGenome sequence, metabolic properties and cyanobacterial attachment of Porphyrobacter sp. HT-58-2 isolated from a filamentous cyanobacterium-microbial consortium.
Microbiology (Reading)
October 2018
2Department of Plant and Microbial Biology, North Carolina State University, Raleigh, North Carolina 27695-7615, USA.
Tolyporphins are structurally diverse tetrapyrrole macrocycles produced by the cyanobacterial culture HT-58-2. Although tolyporphins were discovered over 25 years ago, little was known about the microbiology of the culture. The studies reported herein expand the description of the community of predominantly alphaproteobacteria associated with the filamentous HT-58-2 cyanobacterium and isolate a dominant bacterium, Porphyrobacter sp.
View Article and Find Full Text PDFSynthesis and Self-Aggregation of π-Expanded Chlorophyll Derivatives to Construct Light-Harvesting Antenna Models.
J Org Chem
April 2018
Graduate School of Life Sciences , Ritsumeikan University, Kusatsu , Shiga 525-8577 , Japan.
Chlorosomes are one of the elegant light-harvesting antenna systems in anoxygenic photosynthetic bacteria, whose core is constructed from J-type self-aggregation of bacteriochlorophyll- c, bacteriochlorophyll- d, bacteriochlorophyll- e, and bacteriochlorophyll- f molecules without the influence of polypeptides. Chlorosomal supramolecular models were built up using synthetic porphyrin-type bacteriochlorophyll- d analogues with a methoxycarbonylethenyl, formyl, vinyl, or ethyl group at the 8-position. Their chlorosomal self-aggregates in an aqueous micelle solution showed relatively intense absorption bands around 500-600 nm where antennas of natural oxygenic phototrophs, as well as green sulfur bacteria possessing bacteriochlorophylls- c/ d, absorb light less efficiently; this observation is called the "green gap".
View Article and Find Full Text PDFDatabase of Absorption and Fluorescence Spectra of >300 Common Compounds for use in PhotochemCAD.
Photochem Photobiol
March 2018
Department of Chemistry, North Carolina State University, Raleigh, NC.
The design of new molecules for photochemical studies typically requires knowledge of spectral features of pertinent chromophores beginning with the absorption spectrum (λ ) and accompanying molar absorption coefficient (ε, m cm ) and often extending to the fluorescence spectrum (λ ) and fluorescence quantum yield (Φ ), where the fluorescence properties may be of direct relevance or useful as proxies to gain insight into the nature of the first excited singlet state. PhotochemCAD databases, developed over a period of 30 years, are described here. The previous databases for 150 compounds have been expanded to encompass 339 compounds for which absorption spectra (including ε values), fluorescence spectra (including Φ values) and references to the primary literature have been included where available (552 spectra altogether).
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