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Hannick, Linda lhannick at
Thu Jun 13 10:50:08 PDT 2002

We are currently looking at dirigent proteins, and are not experts in lignan
biosynthesis.  Maybe someone with more expertise in this field can help us
come up with a GO term to accurately describe the function of this protein
and where it fits in the DAG (GO:0009807 accurately describes the process
that it is involved in).  
Dirigent proteins, in the presence of an oxidase or one electron oxidant,
affect stereoselective biomolecular phenoxy radical coupling (See Gang et
al. (1999) Chem Biol 6, 143-151).  They do not have a catalytically active
(oxidative) center, but they orient free radical substrates in such a way
that random coupling cannot occur, and only the 8-8'-coupled intermediate
(+)-pinoresinol is formed.  Any suggestions on where this should be added?
Roger Smith
The Institute for Genomic Research
Bioinformatics Analyst
rsmith at
Linda I. Hannick, Ph.D.
The Institute for Genomic Research
Bioinformatics Analyst
9712 Medical Center Drive
Rockville  MD  20850 
301-838-5857 voice
301-838-0208 fax
lhannick at 
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