| Title: | "A region corresponding to second aspartate-rich motif in tryptophan isoprenylating enzyme, ComQ, serves as a substrate-binding site" |
| Author(s): | Okada M; Ishihara A; Yamasaki R; Tsuji F; Hayashi S; Usami S; Sakagami Y; |
| Address: | "a Graduate School of Bioscience and Biotechnology, Chubu University , Kasugai , Japan" |
| Journal Title: | Biosci Biotechnol Biochem |
| DOI: | 10.1080/09168451.2014.891932 |
| ISSN/ISBN: | 1347-6947 (Electronic) 0916-8451 (Linking) |
| Abstract: | "Posttranslational isoprenylation of a tryptophan residue identified from Bacillus quorum sensing pheromone, ComX pheromone, is unique and essential for the bioactivity. A modifying enzyme, ComQ, forms ComX pheromone from the ComX precursor and isoprenyl pyrophosphate and exhibits moderate similarity to isoprenyl pyrophosphate synthases. We investigated non-conserved region in ComQ, corresponding to isopentenyl pyrophosphate binding region of the synthases, using in vitro cell-free isoprenylation. These results suggested that the only conserved aspartic acid residue in the region of ComQ is critical for enzyme activity and responsible for ComX binding. Our findings should contribute to basic understanding of the mechanism of tryptophan isoprenylation" |
| Keywords: | "Amino Acid Motifs Amino Acid Sequence Amino Acid Substitution *Aspartic Acid Bacillus subtilis Bacterial Proteins/*chemistry/genetics/*metabolism Binding Sites Membrane Proteins/*chemistry/genetics/*metabolism Molecular Sequence Data Mutagenesis, Site-Dir;" |
| Notes: | "MedlineOkada, Masahiro Ishihara, Ayako Yamasaki, Risa Tsuji, Fumitada Hayashi, Shunsuke Usami, Syohei Sakagami, Youji eng Research Support, Non-U.S. Gov't England 2014/07/19 Biosci Biotechnol Biochem. 2014; 78(4):550-5. doi: 10.1080/09168451.2014.891932. Epub 2014 Apr 29" |
