The phrase "acting as key" is correct and usable in written English.
It can be used to describe something that plays a crucial or essential role in a particular context or situation.
Example: "The new software is acting as key to improving our team's productivity and efficiency."
Alternatives: "serving as crucial" or "functioning as essential".
The miRNAs validated by RT-PCR in our cohort of patients (miR146a-5p, miR-16-5p, miR-125b-5pmiR-125b-5p, miR223-3p; miR126-3p) have been previously reported to act as relevant regulators of immune cells development, playing crucial roles in the inflammatory response, and acting as key players in the pathogenesis of various chronic and autoimmune disorders, including RA itself [ 24].
Joyce and James travelled internationally for many years lecturing, showing the films and acting as key speakers at conferences in the US, Australia, New Zealand and Europe.
Once court artists, they are today a predominantly hereditary caste of traditional West African troubadour-historians who perform a variety of social and cultural functions from genealogy and praise singing to acting as key celebrants of village ceremonies.
Moreover, net proteolytic activity relies upon direct interactions between the different protease and protease inhibitor families, interconnected in a complex protease web, with MMPs acting as key nodal components.
Jessica Silver-Greenberg, a banking and consumer finance reporter for The Times, disclosed on Feb. 23 that major banks, including JPMorgan Chase, Bank of America and Wells Fargo, have been acting as key intermediaries, allowing online lenders to directly collect money from the bank accounts of those borrowers who have accounts.
The Transactional Stress Model supports that there are two processes acting as key mediators between events experienced by an individual and the perception that they are stressors: cognitive assessment (thought processes that sustain how events are interpreted and the cause attributed to them) and coping (efforts made by an individual to face a stressful event) (Wallbank & Robertson, 2013).
Another key solution is acting as soon as a child goes missing.
The artist made a series of unadorned copies of each key, acting as blank keys waiting to have personal information imprinted on them, although they are in fact incapable of opening anything.
Besides acting as a key molecular switch in the gonads, recent data has shown that SRY may also act as a transcriptional regulator in the brain.
Thailand profits by buying Myanmar's gas, as does Singapore by acting as a key trading link and safe haven for the generals' wealth.
Iron availability limits phytoplankton growth throughout the oceans, acting as a key influence on the global carbon cycle and the oceanic response to changing climate.
