Turkish Journal of Biology
Abstract
In this study, transformation of BrCHS var 2 into B. rotunda cell suspension culture, followed by chalcone synthase enzymatic assay and HPLC analysis was conducted to investigate whether the substrate specificity for BrCHS var 2 is either cinnamoyl-CoA or p-coumaroyl-CoA. The HPLC profile showed an increase in the amount of pinocembrin chalcone when cinnamoyl-CoA and malonyl-CoA were added but not p-coumaroyl-CoA. Molecular docking was performed to explore the binding of cinnamoyl-CoA and p-coumaroyl-CoA to BrCHS var 2 receptor and the docking results showed that cinnamoyl-CoA formed numerous hydrogen bonds and more negative docked energy than p-coumaroyl-CoA. Cinnamoyl-CoA showed good interactions with Cys 164 to initiate the subsequent formation of pinocembrin chalcone, whereas the hydroxyl group of p-coumaroyl-CoA formed an unfavorable interaction with Gln 161 that caused steric hindrance to subsequent formation of naringenin chalcone. Docked conformation analysis results also showed that malonyl-CoA formed hydrogen bonding with Cys 164, His 303, and Asn 336 residues in BrCHS var 2. The results show that cinnamoyl-CoA is the preferred substrate for BrCHS var 2.
DOI
10.3906/biy-1710-107
Keywords
Chalcone synthase, cell suspension culture, homology modelling, molecular docking
First Page
213
Last Page
223
Recommended Citation
SANMUGAVELAN, RAGAVENTHAN; TEOH, TEOW CHONG; ROSLAN, NURNADIAH; and MOHAMED, ZULQARNAIN
(2018)
"In vitro and in silico studies of chalcone synthase variant 2 in Boesenbergia rotunda and its substrate specificity,"
Turkish Journal of Biology: Vol. 42:
No.
3, Article 2.
https://doi.org/10.3906/biy-1710-107
Available at:
https://journals.tubitak.gov.tr/biology/vol42/iss3/2
