CD Biosynsis provides professional sequence design and optimization services for synthetic biology researchers around the world to facilitate their cutting-edge research.
After protein backbone building, the next step is to generate a sequence that will fold well in the desired topology. The most general and widely used sequence design algorithm in Rosetta is the Packer, which performs a simulated annealing optimization of the side chain placement in a fixed backbone. In order to find the best sequence for a given backbone, fixed backbone sequence design is usually alternated with smaller backbone perturbation and minimization. The iteration of this approach allows the achievement of lower energy structures and more diverse sequences.
Although the Packer is a very powerful side chain optimization algorithm, it is well known that it may be severely affected by the limitations of energy functions and sequence sampling algorithms, which in turn may lead to undesirable/suboptimal design features. To avoid these problems, different strategies have been conceived, such as layer design, consensus loop design, disulfide search, custom selections, to bias the Packer to find the best solutions.
Figure 1. Model-based rotamer repacking and sequence design. (Anand N, et al., 2020)
CD Biosynsis uses advanced bioinformatics tools and calculation methods to provide customers with high-quality sequence design and optimization services.
CD Biosynsis is here to conduct reasonable sequence design and optimization according to customer scientific research requirements, and to provide sequence space search and candidate sequence identification services.
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