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X-ray crystal structure of the light-independent protochlorophyllide reductase
A unique trans-specific reduction mechanism is proposed in which the distorted C17-propionate of Pchlide and an aspartate from BchB serve as proton donors for C18 and C17 of PChlide, respectively. Expand
A Second Nitrogenase-like Enzyme for Bacteriochlorophyll Biosynthesis
It is demonstrated that the B-ring of chlorin is reduced by a second nitrogenase-like enzyme and that the sequential actions of two nitrogen enzyme-like enzymes, DPOR and COR, convert porphyrin to bacteriochlorin. Expand
Identification of Two Homologous Genes, chlAI and chlAII, That Are Differentially Involved in Isocyclic Ring Formation of Chlorophyll a in the Cyanobacterium Synechocystis sp. PCC 6803*
Findings suggested that Chl AI is the sole MPE cyclase system under aerobic conditions and that the induced ChlAII operates together with ChlAI under micro-oxic conditions. Expand
An unexpectedly branched biosynthetic pathway for bacteriochlorophyll b capable of absorbing near-infrared light
The present data indicate that the plasticity of the nitrogenase-like enzyme caused the branched pathways of BChls a and b biosynthesis, ultimately leading to ecologically different niches of B Chl a- and b-based photosynthesis differentiated by more than 150 nm wavelength. Expand
Metabolic engineering of the Chl d-dominated cyanobacterium Acaryochloris marina: production of a novel Chl species by the introduction of the chlorophyllide a oxygenase gene.
A transformation system for a Chl d-dominated cyanobacterium, Acaryochloris marina, is established for the first time, demonstrating the flexibility of the Chl biosynthetic pathway for the production of novel Chl species, indicating that a new organism with a novel ChL might be discovered in the future. Expand
Ubiquity and quantitative significance of detoxification catabolism of chlorophyll associated with protistan herbivory
The herbivorous protists that convert chlorophyll a to cPPB-aE are suggested to play more significant roles in the modern oceanic carbon flux than was previously recognized, critically linking microscopic primary producers to the macroscopic food web and carbon sequestration in the ocean. Expand
Completion of biosynthetic pathways for bacteriochlorophyll g in Heliobacterium modesticaldum: The C8-ethylidene group formation.
The finding led to plausible biosynthetic pathways for 8(1)-hydroxy-chlorophyll a, a primary electron acceptor from the special pair in heliobacterial reaction centers, and proposed catalytic mechanisms on hydrogenation reaction of the ethylidene synthase-type CORs are discussed. Expand
Significant enhancement in the power-conversion efficiency of chlorophyll co-sensitized solar cells by mimicking the principles of natural photosynthetic light-harvesting complexes.
It is suggested that it is possible to apply multiple pigments and the energy transfer mechanism from natural photosynthetic systems in fabricating high-efficiency DSSCs. Expand
Non‐enzymatic conversion of chlorophyll‐a into chlorophyll‐d in vitro: A model oxidation pathway for chlorophyll‐d biosynthesis
This mild pathway can give insights into the yet unidentified Chl‐d biosynthesis. Expand
Synthetic Zinc and Magnesium Chlorin Aggregates as Models for Supramolecular Antenna Complexes in Chlorosomes of Green Photosynthetic Bacteria
Abstract— A comparison of the spectra of in vitro (3‐hydroxymethyl‐131‐oxometallochlorin) and in vivo chlorosomal (bacterio‐chlorophyll‐c) aggregates suggests a similar supramolecular structure forExpand