Journal of Chemical Information and Modeling, volume 61, issue 3, pages 1215-1225

Light-Induced Change of Arginine Conformation Modulates the Rate of Adenosine Triphosphate to Cyclic Adenosine Monophosphate Conversion in the Optogenetic System Containing Photoactivated Adenylyl Cyclase

Publication typeJournal Article
Publication date2021-03-08
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor5.6
ISSN15499596, 1549960X
General Chemistry
Computer Science Applications
General Chemical Engineering
Library and Information Sciences
Abstract
We report the first computational characterization of an optogenetic system composed of two photosensing BLUF (blue light sensor using flavin adenine dinucleotide) domains and two catalytic adenylyl cyclase (AC) domains. Conversion of adenosine triphosphate (ATP) to the reaction products, cyclic adenosine monophosphate (cAMP) and pyrophosphate (PPi), catalyzed by ACs initiated by excitation in photosensing domains has emerged in the focus of modern optogenetic applications because of the request in photoregulated enzymes that modulate cellular concentrations of signaling messengers. The photoactivated AC from the soil bacterium Beggiatoa sp. (bPAC) is an important model showing a considerable increase in the ATP to cAMP conversion rate in the catalytic domain after the illumination of the BLUF domain. The 1 μs classical molecular dynamics simulations reveal that the activation of the BLUF domain leading to tautomerization of Gln49 in the chromophore-binding pocket results in switching of the position of the side chain of Arg278 in the active site of AC. Allosteric signal transmission pathways between Gln49 from BLUF and Arg278 from AC were revealed by the dynamical network analysis. The Gibbs energy profiles of the ATP → cAMP + PPi reaction computed using QM(DFT(ωB97X-D3/6-31G**))/MM(CHARMM) molecular dynamics simulations for both Arg278 conformations in AC clarify the reaction mechanism. In the light-activated system, the corresponding arginine conformation stabilizes the pentacoordinated phosphorus of the α-phosphate group in the transition state, thus lowering the activation energy. Simulations of the bPAC system with the Tyr7Phe replacement in the BLUF demonstrate occurrence of both arginine conformations in an equal ratio, explaining the experimentally observed intermediate catalytic activity of the bPAC-Y7F variant as compared with the dark and light states of the wild-type bPAC.

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Khrenova M. G. et al. Light-Induced Change of Arginine Conformation Modulates the Rate of Adenosine Triphosphate to Cyclic Adenosine Monophosphate Conversion in the Optogenetic System Containing Photoactivated Adenylyl Cyclase // Journal of Chemical Information and Modeling. 2021. Vol. 61. No. 3. pp. 1215-1225.
GOST all authors (up to 50) Copy
Khrenova M. G., Kulakova A. M., Nemukhin A. Light-Induced Change of Arginine Conformation Modulates the Rate of Adenosine Triphosphate to Cyclic Adenosine Monophosphate Conversion in the Optogenetic System Containing Photoactivated Adenylyl Cyclase // Journal of Chemical Information and Modeling. 2021. Vol. 61. No. 3. pp. 1215-1225.
RIS |
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TY - JOUR
DO - 10.1021/ACS.JCIM.0C01308
UR - https://doi.org/10.1021%2FACS.JCIM.0C01308
TI - Light-Induced Change of Arginine Conformation Modulates the Rate of Adenosine Triphosphate to Cyclic Adenosine Monophosphate Conversion in the Optogenetic System Containing Photoactivated Adenylyl Cyclase
T2 - Journal of Chemical Information and Modeling
AU - Khrenova, Maria G.
AU - Nemukhin, Alexander
AU - Kulakova, Anna M
PY - 2021
DA - 2021/03/08 00:00:00
PB - American Chemical Society (ACS)
SP - 1215-1225
IS - 3
VL - 61
SN - 1549-9596
SN - 1549-960X
ER -
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@article{2021_Khrenova
author = {Maria G. Khrenova and Alexander Nemukhin and Anna M Kulakova},
title = {Light-Induced Change of Arginine Conformation Modulates the Rate of Adenosine Triphosphate to Cyclic Adenosine Monophosphate Conversion in the Optogenetic System Containing Photoactivated Adenylyl Cyclase},
journal = {Journal of Chemical Information and Modeling},
year = {2021},
volume = {61},
publisher = {American Chemical Society (ACS)},
month = {mar},
url = {https://doi.org/10.1021%2FACS.JCIM.0C01308},
number = {3},
pages = {1215--1225},
doi = {10.1021/ACS.JCIM.0C01308}
}
MLA
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Khrenova, Maria G., et al. “Light-Induced Change of Arginine Conformation Modulates the Rate of Adenosine Triphosphate to Cyclic Adenosine Monophosphate Conversion in the Optogenetic System Containing Photoactivated Adenylyl Cyclase.” Journal of Chemical Information and Modeling, vol. 61, no. 3, Mar. 2021, pp. 1215-1225. https://doi.org/10.1021%2FACS.JCIM.0C01308.
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