Curved Carbon Fragment of C60 as a Ligand

Synfacts ◽  
2006 ◽  
Vol 2006 (11) ◽  
pp. 1122-1122 ◽  
Author(s):  
J. Siegel ◽  
R. Dorta ◽  
K. Baldridge ◽  
A. Linden
Keyword(s):  
Carbon Fragment

scholarly journals Biosynthesis of vitamin B12: Concerning the identity of the two-carbon fragment eliminated during anaerobic formation of cobyrinic acid

1996 ◽  
Vol 93 (25) ◽  
pp. 14320-14322 ◽  
Author(s):  
J. Wang ◽  
N. J. Stolowich ◽  
P. J. Santander ◽  
J. H. Park ◽  
A. I. Scott
Keyword(s):  
Vitamin B12 ◽  
Carbon Fragment

BIOCHEMISTRY OF THE USTILAGINALES: XIV. BIOASSIMILATION OF L-ERYTHRULOSE INTO 4-O-β-D-MANNOPYRANOSYL-D-ERYTHRITOL

1960 ◽  
Vol 38 (1) ◽  
pp. 953-956
Author(s):  
P. A. J. Gorin ◽  
R. H. Haskins ◽  
J. F. T. Spencer
Keyword(s):  
Distribution Pattern ◽  
Carbon Fragment

L-Erythrulose-1-C14 and -4-C14 were used as precursors in the biosynthesis of 4-O-β-D-mannopyranosyl-D-erythritol. The ketose was utilized efficiently and the C14 distribution pattern in the product indicated that the 4-carbon fragment was transferred intact to C-3, C-4, C-5, and C-6 of the mannose moiety and was also reduced intact to the erythritol portion.A method for the degradation of D-mannose for determination of the C14 distribution in the molecule is described.

BIOCHEMISTRY OF THE USTILAGINALES: XIV. BIOASSIMILATION OF L-ERYTHRULOSE INTO 4-O-β-D-MANNOPYRANOSYL-D-ERYTHRITOL

1960 ◽  
Vol 38 (9) ◽  
pp. 953-956
Author(s):  
P. A. J. Gorin ◽  
R. H. Haskins ◽  
J. F. T. Spencer
Keyword(s):  
Distribution Pattern ◽  
Carbon Fragment

L-Erythrulose-1-C14 and -4-C14 were used as precursors in the biosynthesis of 4-O-β-D-mannopyranosyl-D-erythritol. The ketose was utilized efficiently and the C14 distribution pattern in the product indicated that the 4-carbon fragment was transferred intact to C-3, C-4, C-5, and C-6 of the mannose moiety and was also reduced intact to the erythritol portion.A method for the degradation of D-mannose for determination of the C14 distribution in the molecule is described.

THE BIOSYNTHESIS OF ERYTHRITOL AND GLYCEROL BY TORULOPSIS MAGNOLIAE. STUDIES WITH C14-LABELLED GLUCOSE

1960 ◽  
Vol 38 (2) ◽  
pp. 157-164 ◽  
Author(s):  
J. F. T. Spencer ◽  
P. A. J. Gorin
Keyword(s):  
Major Part ◽  
Radioactive Carbon ◽  
Complex Series ◽  
Acetobacter Suboxydans ◽  
Carbon Fragment

D-Glucose-1-C14, D-glucose-2-C14, D-glucose-3, 4-C14, and D-glucose-6-C14 were dissimilated aerobically by washed cells of Torulopsis magnoliae. The major products formed were erythritol and glycerol.A method for the stepwise degradation of erythritol, after oxidation with Acetobacter suboxydans to L-erythrulose, is described. The distribution of radioactive carbon in the erythritol suggests that it is formed by a complex series of reactions in which enzymes of the transaldolase and transketolase type play a major part to give a four-carbon fragment which is then reduced to the tetritol. Enzymes of the Embden–Meyerhof pathway are probably concerned to a lesser extent.

Evidence for the occurrence of a novel pathway of benzoic acid metabolism involving the addition of a two carbon fragment

1981 ◽  
Vol 30 (13) ◽  
pp. 1879-1882 ◽  
Author(s):  
Mary Varwell Marsh ◽  
Andrew J. Hutt ◽  
John Caldwell ◽  
Robert L. Smith ◽  
Marion W. Horner ◽  
...  
Keyword(s):  
Benzoic Acid ◽  
Acid Metabolism ◽  
Carbon Fragment

Aerobic degradation of choline by Proteus mirabilis: enzymatic requirements and pathway

1986 ◽  
Vol 32 (9) ◽  
pp. 743-750 ◽  
Author(s):  
Sukhvinder S. Sandhu ◽  
Theodore Chase Jr.
Keyword(s):  
Proteus Mirabilis ◽  
Reaction System ◽  
Divalent Metal ◽  
Vitamin B ◽  
Aerobic Degradation ◽  
Divalent Metal Cation ◽  
Carbon Fragment ◽  
Tightly Coupled ◽  
Lag Period ◽  
Lactobacillus Leichmannii

Cleavage of choline to trimethylamine and acetaldehyde by extracts of Proteus mirabilis requires both particulate and soluble protein fractions, K+, and a bound divalent metal cation. The reaction shows a long lag period, abolished only by preincubation of the particulate fraction in the complete reaction system. The two-carbon fragment produced is acetaldehyde; choline cleavage appears to be tightly coupled to dismutation of the acetaldehyde to ethanol and acetate, as indicated by stimulation by NAD+, ADP. and Fe2+ and inhibition by reagents reacting with acetaldehyde. The system is thus similar to that previously described in anaerobes (Desulfovibrio, Clostridium). Attempts to demonstrate a cobamide coenzyme requirement (as in the similar ethanolamine ammonia-lyase reaction) were unsuccessful; the reaction was carried out by fractions devoid of vitamin B12 activity (not supporting growth of Lactobacillus leichmannii) and insensitive to light.

Biosynthesis of Lycomarasmin

1973 ◽  
Vol 51 (23) ◽  
pp. 3943-3949 ◽  
Author(s):  
C. R. POPPLESTONE ◽  
A. M. Unrau
Keyword(s):  
Carbon Source ◽  
Liquid Medium ◽  
Fusarium Oxysporum ◽  
Acid Hydrolysis ◽  
Aspartic Acid ◽  
Pyruvic Acid ◽  
Tracer Studies ◽  
Direct Route ◽  
Carbon Fragment ◽  
Hydrolysis Of

Cultures of Fusarium oxysporum Schl. emend. Sny. et Hans. f lycopersici (Sacc.) Sny. et Hans. grown on a liquid medium with glucose as the principal carbon source produce, among other products, the phytotoxin lycomarasmin. Acid hydrolysis of lycomarasmin results in the formation of aspartic acid, glycine, and pyruvic acid. Tracer studies showed that glycine-U-I4C, L-serine-U-14C, DL-aspartic acid-4-14C, DL-alanine-1-14C, and glucose-U-14C served as relatively efficient precursors of the lycomarasmin molecule. DL-Aspartic acid-4-I4C was incorporated into the 4-carbon fragment without label scrambling. Glycine was found to be the most efficient precursor of the 2-carbon fragment while glucose afforded the most efficient and direct route for the 3-carbon fragment.

Neopterin und Neopterin-3′-phosphat als Vorläufer der Folsäure bei Mycobacterium smegmatis

1969 ◽  
Vol 24 (5) ◽  
pp. 569-574 ◽  
Author(s):  
L. Jaenicke ◽  
Ch. Molzberger ◽  
I. Schlie ◽  
R. Tschesche ◽  
K. Brandau ◽  
...  
Keyword(s):  
Mycobacterium Smegmatis ◽  
Side Chain ◽  
Isotopic Data ◽  
Carbon Fragment ◽  
Folate Biosynthesis ◽  
Methylene Group

Extracts of Mycobacterium smegmatis synthesise dihydro-pteroate and dihydro-folate from dihydro-pteridine-6-carbinol as well as from dihydro-neopterin and dihydro-neopterin-3′-phosphate. The 7-isomers of the pteridine precursors are neither substrates nor inhibitors of folate biosynthesis. Side-chain 14C-labelled dihydro-neopterin yields similarly labelled dihydro-folate. From the isotopic data it is concluded that a two-carbon fragment is split off the chain and that C-1′ of dihydroneopterin becomes the bridging methylene group between the pteridine and the p-aminobenzoyl moiety of the compound produced.

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