1dff: Difference between revisions

Protein synthesis in bacteria involves the formylation and deformylation, of the N-terminal methionine. As eukaryotic organisms differ in their, protein biosynthetic mechanisms, peptide deformylase, the bacterial enzyme, responsible for deformylation, represents a potential target for, antibiotic studies. Here we report the crystallization and 2.9 A X-ray, structure solution of the zinc containing Escherichia coli peptide, deformylase. While the primary sequence, tertiary structure, and use of, coordinated cysteine suggest that E. coli deformylase belongs to a new, subfamily of metalloproteases, the environment around the metal appears to, have strong geometric similarity to the active sites of the thermolysin, family. This suggests a possible similarity in their hydrolytic, mechanisms. Another important issue is the origin of the enzyme's, specificity for N-formylated over N-acetylated substrates. Based on the, structure, the specificity appears to result from hydrogen-bonding, interactions which orient the substrate for cleavage, and steric factors, which physically limit the size of the N-terminal carbonyl group.

1DFF is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli] with ZN as [http://en.wikipedia.org/wiki/ligand ligand]. Active as [http://en.wikipedia.org/wiki/Formylmethionine_deformylase Formylmethionine deformylase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.5.1.31 3.5.1.31] Structure known Active Site: CAT. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1DFF OCA].  

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