Formation of δ-aminolevulinic Acid from Glutamic Acid in Algal Extracts: Fractionation of Activities and Biological Constraints on the RNA Requirement

1987 ◽  
pp. 435-438
Author(s):  
Jon D. Weinstein ◽  
Sandra M. Mayer ◽  
Samuel I. Beale
Keyword(s):  
Glutamic Acid ◽  
Aminolevulinic Acid ◽  
Biological Constraints ◽  
Algal Extracts

scholarly journals Formation of δ-Aminolevulinic Acid from Glutamic Acid in Algal Extracts

1987 ◽  
Vol 84 (2) ◽  
pp. 244-250 ◽  
Author(s):  
Jon D. Weinstein ◽  
Sandra M. Mayer ◽  
Samuel I. Beale
Keyword(s):  
Glutamic Acid ◽  
Aminolevulinic Acid ◽  
Algal Extracts

Components of chlorophyll biosynthesis in a barley albina mutant unable to synthesize ?-aminolevulinic acid by utilizing the transfer RNA for glutamic acid

Planta ◽  
1992 ◽  
Vol 188 (1) ◽  
pp. 19-27 ◽  
Author(s):  
Wolfgang R. Hess ◽  
Rudolf Schendel ◽  
Wolfhart R�diger ◽  
Birte Fieder ◽  
Thomas B�rner
Keyword(s):  
Glutamic Acid ◽  
Aminolevulinic Acid ◽  
Chlorophyll Biosynthesis ◽  
Transfer Rna

Glutamic Acid-1-semialdehyde, a Hypothetical Intermediate in the Biosynthesis of 5-Aminolevulinic Acid

1987 ◽  
Vol 42 (3) ◽  
pp. 209-214 ◽  
Author(s):  
A. Kah ◽  
D. Dörnemann
Keyword(s):  
Chemical Synthesis ◽  
Glutamic Acid ◽  
Aminolevulinic Acid ◽  
Cyclic Compound ◽  
Pyroglutamic Acid ◽  
Chain Mechanism ◽  
Open Chain

Whether glutamate-1-semialdehyde (G-1-SA) or 4,5 dioxovalerate (DOVA) is the intermedi­ate between glutamate and ALA in the C-5 tetrapyrrol pathway is still a matter of controversy. Since no data characterizing G-1-SA are available it is not possible either to identify G-1-SA as intermediate or a precursor of ALA. Therefore, attempts were made to establish a chemical synthesis of this compound. Two strategies were developed: starting from protected glutamate via an open chain mechanism or from the cyclic compound pyroglutamic acid or derivatives. None of the attempts were successful. Both approaches yielded undefined polymeric products when it was tried to liberate G-1-SA from the last intermediate of the synthesis sequence.

scholarly journals Glutamic Acid and 5-Aminolevulinic Acid May Function as Precursors of System II Ethylene in Ripening Tomato Fruit

HortScience ◽  
1996 ◽  
Vol 31 (4) ◽  
pp. 641d-641
Author(s):  
H.P.V. Rupasinghe ◽  
Richard J. Gladon
Keyword(s):  
Glutamic Acid ◽  
Incubation Period ◽  
Ethylene Production ◽  
Aminolevulinic Acid ◽  
Tomato Fruit ◽  
Citrate Buffer ◽  
Tomato Fruit Ripening ◽  
Buffer Control ◽  
Ripe Stage ◽  
Acc Content

The ethylene biosynthetic pathway has been established as methionine (MET) to S-adenosylmethionine to 1-aminocyclopropane-1-carboxylic acid (ACC) to ethylene, and this pathway has been labeled System I. Another pathway to ethylene may exist during synthesis of massive amounts of ethylene, and this system has been labeled System II. Our objective was to evaluate the efficacy of several compounds as possible precursors of System II ethylene in ripening tomato fruit tissue. Discs of `Rutgers' tomato pericarp tissue at the mature green, pink, and red ripe stages were incubated continuously in 10, 25, or 40 mm solutions of MET, ACC, 5-aminolevulinic acid (ALA), homocysteine, glutamic acid (GLU), alpha-ketoglutarate, or citrate buffer (control). The ethylene production rate at 8-hour intervals during a 32-hour incubation period and free and conjugated ACC content at the end of the incubation period were quantified. Fruit discs at the mature green stage treated with MET and ACC exhibited increased ethylene production and increased free ACC content. These results confirmed the role of MET and ACC as the predominant precursors of ethylene during the early stages of fruit development in tomato (System I). At the pink stage (System II); however, ALA increased ethylene production by 75% and free ACC content by 46% over the control, and MET increased ethylene by 27% and free ACC content by 57% over the control. At the red ripe stage, ALA caused a 35% increase and GLU caused a 31% increase in ethylene production over the control. These results suggest that ALA and GLU may be metabolized to ethylene via an unknown pathway during tomato fruit ripening (System II).

Some factors influencing vitamin B12 production by Pseudomonas denitrificans

1970 ◽  
Vol 16 (9) ◽  
pp. 809-815 ◽  
Author(s):  
Horace J. Daniels
Keyword(s):  
Oxalic Acid ◽  
Glutamic Acid ◽  
Aminolevulinic Acid ◽  
Defined Medium ◽  
Vitamin B ◽  
Chemically Defined Medium ◽  
Mineral Salts ◽  
Pseudomonas Denitrificans ◽  
Factors Influencing ◽  
Vitamin Production

The effect of known precursors and cofactors on vitamin B12 production has been studied in a basal, chemically defined medium composed of sucrose, glutamic acid, and mineral salts. Only a carbon source, betaine, and Co2+ were found to be essential for vitamin B12 production. Known precursors such as methionine, δ-aminolevulinic acid, succinic acid, and 1-amino-2-propanol had no effect. Glycine was inhibitory to growth. Oxalic acid, lactic acid, 5,6-dimethylbenzimidazole, and Mo2+ stimulated vitamin B12 biosynthesis. Of special interest is oxalic acid, which at a level of 0.04% w/v increased vitamin production about 20%, and with washed cells could replace glutamic acid, which had been demonstrated to be essential for both growth and vitamin B12 production. When use of oxalate was followed, it was found that this acid disappeared during the period of rapid growth and vitamin production and then reappeared during the final stages of the fermentation cycle.

scholarly journals Stimulation of δ-Aminolevulinic Acid Formation in Algal Extracts by Heterologous RNA

1986 ◽  
Vol 82 (4) ◽  
pp. 1096-1101 ◽  
Author(s):  
Jon D. Weinstein ◽  
Sandra M. Mayer ◽  
Samuel I. Beale
Keyword(s):  
Aminolevulinic Acid ◽  
Acid Formation ◽  
Algal Extracts ◽  
Stimulation Of

Components of chlorophyll biosynthesis in a barley albina mutant unable to synthesize ?-aminolevulinic acid by utilizing the transfer RNA for glutamic acid

Planta ◽  
1992 ◽  
Vol 188 (1) ◽  
Author(s):  
WolfgangR. Hess ◽  
Rudolf Schendel ◽  
Wolfhart R�diger ◽  
Birte Fieder ◽  
Thomas B�rner
Keyword(s):  
Glutamic Acid ◽  
Aminolevulinic Acid ◽  
Chlorophyll Biosynthesis ◽  
Transfer Rna
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