Regulation of signaling directionality revealed by 3D snapshots of a kinase: Regulator complex in action
Two-component systems (TCS) are protein machineries that enable cells to respond to input signals. Histidine kinases (HK) are the sensory component, transferring information toward downstream response regulators (RR). HKs transfer phosphoryl groups to their specific RRs, but also dephosphorylate the...
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paper:paper_2050084X_v5_nDECEMBER2016_p_Trajtenberg2023-06-08T16:33:49Z Regulation of signaling directionality revealed by 3D snapshots of a kinase: Regulator complex in action Martí, Marcelo Adrián Buschiazzo, Alejandro phosphatase phosphotransferase protein histidine kinase protein histidine kinase transcription factor amino acid sequence Article Bacillus subtilis cloning computer model crystal structure crystallization entropy isothermal titration calorimetry molecular dynamics mutagenesis phosphate transport point mutation protein conformation protein dephosphorylation protein expression protein purification signal transduction size exclusion chromatography structure analysis three dimensional imaging X ray crystallography X ray diffraction chemistry enzymology metabolism molecular model phosphorylation protein processing Bacillus subtilis Crystallography, X-Ray Histidine Kinase Models, Molecular Phosphorylation Protein Conformation Protein Processing, Post-Translational Signal Transduction Transcription Factors Two-component systems (TCS) are protein machineries that enable cells to respond to input signals. Histidine kinases (HK) are the sensory component, transferring information toward downstream response regulators (RR). HKs transfer phosphoryl groups to their specific RRs, but also dephosphorylate them, overall ensuring proper signaling. The mechanisms by which HKs discriminate between such disparate directions, are yet unknown. We now disclose crystal structures of the HK:RR complex DesK:DesR from Bacillus subtilis, comprising snapshots of the phosphotransfer and the dephosphorylation reactions. The HK dictates the reactional outcome through conformational rearrangements that include the reactive histidine. The phosphotransfer center is asymmetric, poised for dissociative nucleophilic substitution. The structural bases of HK phosphatase/phosphotransferase control are uncovered, and the unexpected discovery of a dissociative reactional center, sheds light on the evolution of TCS phosphotransfer reversibility. Our findings should be applicable to a broad range of signaling systems and instrumental in synthetic TCS rewiring. © Trajtenberg et al. Fil:Marti, M.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Buschiazzo, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2016 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_2050084X_v5_nDECEMBER2016_p_Trajtenberg http://hdl.handle.net/20.500.12110/paper_2050084X_v5_nDECEMBER2016_p_Trajtenberg |
institution |
Universidad de Buenos Aires |
institution_str |
I-28 |
repository_str |
R-134 |
collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
topic |
phosphatase phosphotransferase protein histidine kinase protein histidine kinase transcription factor amino acid sequence Article Bacillus subtilis cloning computer model crystal structure crystallization entropy isothermal titration calorimetry molecular dynamics mutagenesis phosphate transport point mutation protein conformation protein dephosphorylation protein expression protein purification signal transduction size exclusion chromatography structure analysis three dimensional imaging X ray crystallography X ray diffraction chemistry enzymology metabolism molecular model phosphorylation protein processing Bacillus subtilis Crystallography, X-Ray Histidine Kinase Models, Molecular Phosphorylation Protein Conformation Protein Processing, Post-Translational Signal Transduction Transcription Factors |
spellingShingle |
phosphatase phosphotransferase protein histidine kinase protein histidine kinase transcription factor amino acid sequence Article Bacillus subtilis cloning computer model crystal structure crystallization entropy isothermal titration calorimetry molecular dynamics mutagenesis phosphate transport point mutation protein conformation protein dephosphorylation protein expression protein purification signal transduction size exclusion chromatography structure analysis three dimensional imaging X ray crystallography X ray diffraction chemistry enzymology metabolism molecular model phosphorylation protein processing Bacillus subtilis Crystallography, X-Ray Histidine Kinase Models, Molecular Phosphorylation Protein Conformation Protein Processing, Post-Translational Signal Transduction Transcription Factors Martí, Marcelo Adrián Buschiazzo, Alejandro Regulation of signaling directionality revealed by 3D snapshots of a kinase: Regulator complex in action |
topic_facet |
phosphatase phosphotransferase protein histidine kinase protein histidine kinase transcription factor amino acid sequence Article Bacillus subtilis cloning computer model crystal structure crystallization entropy isothermal titration calorimetry molecular dynamics mutagenesis phosphate transport point mutation protein conformation protein dephosphorylation protein expression protein purification signal transduction size exclusion chromatography structure analysis three dimensional imaging X ray crystallography X ray diffraction chemistry enzymology metabolism molecular model phosphorylation protein processing Bacillus subtilis Crystallography, X-Ray Histidine Kinase Models, Molecular Phosphorylation Protein Conformation Protein Processing, Post-Translational Signal Transduction Transcription Factors |
description |
Two-component systems (TCS) are protein machineries that enable cells to respond to input signals. Histidine kinases (HK) are the sensory component, transferring information toward downstream response regulators (RR). HKs transfer phosphoryl groups to their specific RRs, but also dephosphorylate them, overall ensuring proper signaling. The mechanisms by which HKs discriminate between such disparate directions, are yet unknown. We now disclose crystal structures of the HK:RR complex DesK:DesR from Bacillus subtilis, comprising snapshots of the phosphotransfer and the dephosphorylation reactions. The HK dictates the reactional outcome through conformational rearrangements that include the reactive histidine. The phosphotransfer center is asymmetric, poised for dissociative nucleophilic substitution. The structural bases of HK phosphatase/phosphotransferase control are uncovered, and the unexpected discovery of a dissociative reactional center, sheds light on the evolution of TCS phosphotransfer reversibility. Our findings should be applicable to a broad range of signaling systems and instrumental in synthetic TCS rewiring. © Trajtenberg et al. |
author |
Martí, Marcelo Adrián Buschiazzo, Alejandro |
author_facet |
Martí, Marcelo Adrián Buschiazzo, Alejandro |
author_sort |
Martí, Marcelo Adrián |
title |
Regulation of signaling directionality revealed by 3D snapshots of a kinase: Regulator complex in action |
title_short |
Regulation of signaling directionality revealed by 3D snapshots of a kinase: Regulator complex in action |
title_full |
Regulation of signaling directionality revealed by 3D snapshots of a kinase: Regulator complex in action |
title_fullStr |
Regulation of signaling directionality revealed by 3D snapshots of a kinase: Regulator complex in action |
title_full_unstemmed |
Regulation of signaling directionality revealed by 3D snapshots of a kinase: Regulator complex in action |
title_sort |
regulation of signaling directionality revealed by 3d snapshots of a kinase: regulator complex in action |
publishDate |
2016 |
url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_2050084X_v5_nDECEMBER2016_p_Trajtenberg http://hdl.handle.net/20.500.12110/paper_2050084X_v5_nDECEMBER2016_p_Trajtenberg |
work_keys_str_mv |
AT martimarceloadrian regulationofsignalingdirectionalityrevealedby3dsnapshotsofakinaseregulatorcomplexinaction AT buschiazzoalejandro regulationofsignalingdirectionalityrevealedby3dsnapshotsofakinaseregulatorcomplexinaction |
_version_ |
1768544060769828864 |