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An unexpectedly branched biosynthetic pathway for bacteriochlorophyll b capable of absorbing near-infrared light
TLDR
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
Oxygen sensitivity of a nitrogenase-like protochlorophyllide reductase from the cyanobacterium Leptolyngbya boryana.
TLDR
The results suggested that the DPOR from an oxygenic photosynthetic organism did not acquire oxygen tolerance during evolution; but that the cyanobacterial cell developed a mechanism to protectDPOR from oxygen. Expand
Completion of biosynthetic pathways for bacteriochlorophyll g in Heliobacterium modesticaldum: The C8-ethylidene group formation.
TLDR
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
Loss of cytochrome cM stimulates cyanobacterial heterotrophic growth in the dark.
TLDR
Results suggest a suppressive role(s) for Cyt cM in regulation of heterotrophic activity in cyanobacterial species that grow heterotrophically in the dark. Expand
Cobalamin's (Vitamin B12) Surprising Function as a Photoreceptor.
TLDR
Bioinformatics analysis reveals other transcription factors, photoreceptors, kinases, and oxygen sensors that harbor a B12-binding domain that could also regulate activity in response to light absorption. Expand
Functional expression of nitrogenase-like protochlorophyllide reductase from Rhodobacter capsulatus in Escherichia coli.
TLDR
These E. coli strains provide a promising system for structural and kinetic analyses of the nitrogenase-like enzymes, and two overexpression plasmids for L-protein and NB-protein were constructed. Expand
Formation of prolamellar-body-like ultrastructures in etiolated cyanobacterial cells overexpressing light-dependent protochlorophyllide oxidoreductase in Leptolyngbya boryana.
TLDR
Cyanobacterial LPOR exhibited an intrinsic ability to form PLB-like ultrastructures in the presence of the co-accumulation of Pchlide; however, the PLB -like structure differed from the authentic PLB regarding NADPH deficiency. Expand
The Effect of Two Amino acid Residue Substitutions via RNA Editing on Dark-operative Protochlorophyllide Oxidoreductase in the Black Pine Chloroplasts
TLDR
RNA editing efficiency was markedly greater in the dark than in the light in cotyledons of the black pine Pinus thunbergii, indicating that RNA editing on chlB mRNA is important to maintain appropriate DPOR activity in black pine chloroplasts. Expand
Reconstitution of a sequential reaction of two nitrogenase-like enzymes in the bacteriochlorophyll biosynthetic pathway of Rhodobacter capsulatus.
TLDR
This reconstitution system confirmed the recent finding that COR catalyzes 8-vinyl reduction of 8.vinyl chlorophyllide a in addition to the known activity of C7C8 double bond reduction, and provides a promising model to investigate how two nitrogenase-like enzymes are coordinated in bacteriochlorophyll biosynthesis. Expand
Rhodobacter sphaeroides mutants overexpressing chlorophyllide a oxidoreductase of Blastochloris viridis elucidate functions of enzymes in late bacteriochlorophyll biosynthetic pathways
TLDR
The results suggest that BchJ enhances activity of the intrinsic COR, which is the first example of an anoxygenic photosynthetic bacterium producing BChls a and b together. Expand
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