Linked Life Data

20397161

Source:http://linkedlifedata.com/resource/pubmed/id/20397161

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
20
pubmed:dateCreated
2010-5-20
pubmed:abstractText
Model coniferyl alcohol lignin (the so-called dehydrogenative polymerisate, DHP) was produced in water under homogeneous conditions guaranteed by the presence of a micellised cationic surfactant. A complete study of the activity of the enzymatic system peroxidase/H(2)O(2) under our reaction conditions was reported and all the reaction products up to the pentamer were characterised by (1)H NMR spectroscopy and ESI mass spectrometry. Our system, and the molecules that have been generated in it, represent a closer mimicry of the natural microenvironment since an enzyme, under micellar conditions, reproduces the cell system better than in buffer alone. On the basis of the oligomers structures a new biosynthetic perspective was proposed that focused attention on a coniferyl alcohol dimeric quinone methide as the key intermediate of the reaction. A formal, strictly alternate sequence of a radical and an ionic step underlines the reaction, thus generating ordered oligolignols structures. Alternatively to other model lignins, our olignols present a lower degree of radical coupling between oligomeric units. This offers a closer biosynthetic situation to the observation of a low rate of radical generation in the cell wall.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
1521-3765
pubmed:author
pubmed:issnType
Electronic
pubmed:day
25
pubmed:volume
16
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
6077-87
pubmed:meshHeading
pubmed:year
2010
pubmed:articleTitle
Lignin chemistry: biosynthetic study and structural characterisation of coniferyl alcohol oligomers formed in vitro in a micellar environment.
pubmed:affiliation
Department of Chemistry, Chemical Engeeneering and Material, University of L'Aquila, Via Vetoio, I-67100 Coppito, L'Aquila, Italy.
pubmed:publicationType
Journal Article