Gene therapy involves putting genes into cells in the body, often to replace native genes that are malfunctioning.
The team had begun by cloning the native genes that allow E. coli to soak up stearic acid in the gut.
The new bacteria were completely devoid of their native genes and, after cell division, became phenotypically equivalent (similar in their observable characteristics) to M. mycoides.
Cloning and expression of native genes and synthetic artificial variants of the consensus sequence repeats from the native genes has been accomplished.
In each of these cases, this engineering was achieved mainly by modulating expression of native genes.
Expression levels and biological activities of both the genes matched the levels of respective native genes.
Native genes and regulatory elements can be reintroduced into plants without the need to use selectable markers.
For example, several microbial strains recently developed for enzyme production have been engineered to increase enzyme yield by deleting native genes encoding extracellular proteases.
We establish the applicability of these methods both for the control of exogenous genes as well as for the control of native genes.
Finally, a systematically chromosomally engineered E. coli strain EB243, in which 33 native genes were deleted and 5 heterologous genes were introduced, was developed.
Similar results that VHb expression did not equally influence the expression of all native genes were also reported in E. coli and A. sojae (Mora-Lugo et al. 2015; Roos et al. 2004).
