The phrase "assumed the function of" is correct and usable in written English.
It can be used when describing a role or responsibility that someone has taken on, often in a formal or professional context.
Example: "After the restructuring, she assumed the function of project manager, overseeing all team activities."
Alternatives: "took on the role of" or "fulfilled the duties of".
Like some other reality TV stars (the Bravo housewives come to mind), characters like Snooki have assumed the function of a new kind of stooge.
As a result, the emperor created the Zongli Yamen ("Office for General Management"), which assumed the function of a foreign affairs office and played an important role in the modernization of China over the next 40 years.
The regulatory process assumed the function of transmitting this information to industry and the scientific community, trying to influence design decisions in relation to products in response to social demands.
In 2013, he was Chief Creative Content Officer until he assumed the function of Creative Guide.
At the cell surface, the neoPGs assumed the function of native HSPGs, rescued FGF2-mediated signaling, and induced neural specification.
One possibility was that the paralog of Efg1, Efh1, had assumed the function of Efg1 in C. tropicalis.
The Superior Court of the District of Columbia, a single trial court, assumed the functions of the previous five courts.
Gentil has asked for Bellamy because he wishes the inspector to hear his confession the decent cop, in a godless world, having tacitly assumed the functions of a priest.
In 1835, therefore, when Ferdinand succeeded his father, Metternich, at first together with the archduke Louis (Ludwig), took the chair at the "conference," or council of state that assumed the functions of a regency.
There thus grew up, especially in the Midwest and Far West, "pastoral meetings" in which a paid minister assumed the functions of delivering a sermon and exercising pastoral care of members.
