1
|
Ujfalusi-Pozsonyi K, Bódis E, Nyitrai M, Kengyel A, Telek E, Pécsi I, Fekete Z, Varnyuné Kis-Bicskei N, Mas C, Moussaoui D, Pernot P, Tully MD, Weik M, Schirò G, Kapetanaki SM, Lukács A. ATP-dependent conformational dynamics in a photoactivated adenylate cyclase revealed by fluorescence spectroscopy and small-angle X-ray scattering. Commun Biol 2024; 7:147. [PMID: 38307988 PMCID: PMC10837130 DOI: 10.1038/s42003-024-05842-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2023] [Accepted: 01/22/2024] [Indexed: 02/04/2024] Open
Abstract
Structural insights into the photoactivated adenylate cyclases can be used to develop new ways of controlling cellular cyclic adenosine monophosphate (cAMP) levels for optogenetic and other applications. In this work, we use an integrative approach that combines biophysical and structural biology methods to provide insight on the interaction of adenosine triphosphate (ATP) with the dark-adapted state of the photoactivated adenylate cyclase from the cyanobacterium Oscillatoria acuminata (OaPAC). A moderate affinity of the nucleotide for the enzyme was calculated and the thermodynamic parameters of the interaction have been obtained. Stopped-flow fluorescence spectroscopy and small-angle solution scattering have revealed significant conformational changes in the enzyme, presumably in the adenylate cyclase (AC) domain during the allosteric mechanism of ATP binding to OaPAC with small and large-scale movements observed to the best of our knowledge for the first time in the enzyme in solution upon ATP binding. These results are in line with previously reported drastic conformational changes taking place in several class III AC domains upon nucleotide binding.
Collapse
Affiliation(s)
- K Ujfalusi-Pozsonyi
- Department of Biophysics, Medical School, University of Pécs, 7624, Pécs, Hungary
| | - E Bódis
- Department of Biophysics, Medical School, University of Pécs, 7624, Pécs, Hungary
| | - M Nyitrai
- Department of Biophysics, Medical School, University of Pécs, 7624, Pécs, Hungary
| | - A Kengyel
- Department of Biophysics, Medical School, University of Pécs, 7624, Pécs, Hungary
| | - E Telek
- Department of Biophysics, Medical School, University of Pécs, 7624, Pécs, Hungary
| | - I Pécsi
- Department of Biophysics, Medical School, University of Pécs, 7624, Pécs, Hungary
| | - Z Fekete
- Department of Biophysics, Medical School, University of Pécs, 7624, Pécs, Hungary
| | | | - C Mas
- Univ. Grenoble Alpes, CNRS, CEA, EMBL, ISBG, F-38000, Grenoble, France
| | - D Moussaoui
- European Synchrotron Radiation Facility (ESRF), Grenoble, France
| | - P Pernot
- European Synchrotron Radiation Facility (ESRF), Grenoble, France
| | - M D Tully
- European Synchrotron Radiation Facility (ESRF), Grenoble, France
| | - M Weik
- Institut de Biologie Structurale (IBS), Université Grenoble Alpes, CEA, CNRS, Grenoble, France
| | - G Schirò
- Institut de Biologie Structurale (IBS), Université Grenoble Alpes, CEA, CNRS, Grenoble, France
| | - S M Kapetanaki
- Institut de Biologie Structurale (IBS), Université Grenoble Alpes, CEA, CNRS, Grenoble, France.
- Department of Biophysics, Medical School, University of Pécs, 7624, Pécs, Hungary.
| | - A Lukács
- Department of Biophysics, Medical School, University of Pécs, 7624, Pécs, Hungary.
| |
Collapse
|
2
|
Gupta A, Pandey P, Gupta R, Tiwari S, Singh SP. Responding to light signals: a comprehensive update on photomorphogenesis in cyanobacteria. Physiol Mol Biol Plants 2023; 29:1915-1930. [PMID: 38222287 PMCID: PMC10784256 DOI: 10.1007/s12298-023-01386-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 11/08/2023] [Accepted: 11/09/2023] [Indexed: 01/16/2024]
Abstract
Cyanobacteria are ancestors of chloroplast and perform oxygen-evolving photosynthesis similar to higher plants and algae. However, an obligatory requirement of photons for their growth results in the exposure of cyanobacteria to varying light conditions. Therefore, the light environment could act as a signal to drive the developmental processes, in addition to photosynthesis, in cyanobacteria. These Gram-negative prokaryotes exhibit characteristic light-dependent developmental processes that maximize their fitness and resource utilization. The development occurring in response to radiance (photomorphogenesis) involves fine-tuning cellular physiology, morphology and metabolism. The best-studied example of cyanobacterial photomorphogenesis is chromatic acclimation (CA), which allows a selected number of cyanobacteria to tailor their light-harvesting antenna called phycobilisome (PBS). The tailoring of PBS under existing wavelengths and abundance of light gives an advantage to cyanobacteria over another photoautotroph. In this work, we will provide a comprehensive update on light-sensing, molecular signaling and signal cascades found in cyanobacteria. We also include recent developments made in other aspects of CA, such as mechanistic insights into changes in the size and shape of cells, filaments and carboxysomes.
Collapse
Affiliation(s)
- Anjali Gupta
- Department of Botany, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, UP 221005 India
| | - Priyul Pandey
- Department of Botany, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, UP 221005 India
| | - Rinkesh Gupta
- Department of Botany, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, UP 221005 India
| | - Sapna Tiwari
- Department of Botany, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, UP 221005 India
| | - Shailendra Pratap Singh
- Department of Botany, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, UP 221005 India
| |
Collapse
|