The phrase "a productive orientation" is correct and usable in written English.
It can be used to describe a mindset or approach that focuses on achieving results and efficiency in a particular context, such as work or learning.
Example: "In our team meetings, we emphasize a productive orientation to ensure that we meet our goals effectively."
Alternatives: "a results-driven approach" or "an efficiency-focused mindset."
In particular, PTEN associates with the bilayer in a nonproductive orientation, but the initial encounter was followed by rotational reorientation to move PTEN in a productive orientation.
It is likely that these substituents are too bulky for a productive orientation of the substrate in the active site of the enzyme.
Assuming that the other substrates (phenylalanine and pterin) can still bind the active site in a productive orientation, the hydroxylation reaction would not be catalyzed by an enzyme deficient in iron.
Altogether, our results seem to indicate that the conserved acidic side chain plays a more prominent role in stabilizing the transition state by placing pterin in a productive orientation with respect to the metal center, most likely by direct hydrogen bonding.
To this end, simulations [ pten-bound-1– 3 (Table 1)] were initiated with PTEN bound to a POPC/POPS bilayer in a productive orientation (as derived from the simulations described above), but with PIP3 molecules placed in the bilayer away (∼60 Å) from the bound PTEN molecule.
In OYE1, binding of carvone in a catalytically productive orientation (Cβ near N5) is facilitated by hydrogen bonding of its carbonyl group with H191 and N194.
The resultant productive orientation was retained for the remainder of the simulation.
The productive orientation of PTEN on the membrane has been suggested to involve association of the C2 domain loops with the lipids.
PTEN continued to interact with the bilayer in the productive orientation described for the CG-MD simulations with the C2 domain loops penetrating into the bilayer.
To further determine the stability of the final orientation, all six repeat simulations of the pten_away-2 system were extended from 3 to 4 μs, resulting in PTEN adopting the productive orientation in five of six simulations.
Note that in all cases PTEN did not initially bind to the bilayer in the productive orientation but the initial encounter was followed by rotational reorientation (see Figure 2) to form more specific interactions via the residues implicated by mutational and computational studies.
