The Functional Complexity of [NiFe] Hydrogenases in Sulfate Reducing Bacteria (Genus; Desulforvibrio spp)

Protein–peptide interactions are involved in a wide range of biological processes and are attractive targets for therapeutic purposes because of their small interfaces. Therefore, effective protein–peptide docking techniques can provide the basis for potential therapeutic applications by enabling an atomic-level understanding of protein interactions. With the increasing number of protein–peptide structures deposited in the protein data bank, the prediction accuracy of protein-peptide docking can be enhanced by utilizing the information provided by the database. The GalaxyPepDock web server, which is freely accessible at http://galaxy.seoklab.org/pepdock, performs similarity-based docking by finding templates from the database of experimentally determined structures and building models using energy-based optimization that allows for structural flexibility. The server can therefore effectively model the structural differences between the template and target protein–peptide complexes. The performance of GalaxyPepDock is superior to those of the other currently available web servers when tested on the PeptiDB set and on recently released complex structures. When tested on the CAPRI target 67, GalaxyPepDock generates models that are more accurate than the best server models submitted during the CAPRI blind prediction experiment.

show abstract

GalaxyPepDock: a protein–peptide docking tool based on interaction similarity and energy optimization

Lee¹,

Heo²,

Lee³

et al. 2015

Nucleic Acids Res

241

173

View full text Add to dashboard Cite

show abstract

Galaxy7TM: flexible GPCR–ligand docking by structure refinement

Lee

Seok

2016

Nucleic Acids Res

View full text Add to dashboard Cite

G-protein-coupled receptors (GPCRs) play important physiological roles related to signal transduction and form a major group of drug targets. Prediction of GPCR–ligand complex structures has therefore important implications to drug discovery. With previously available servers, it was only possible to first predict GPCR structures by homology modeling and then perform ligand docking on the model structures. However, model structures generated without explicit consideration of specific ligands of interest can be inaccurate because GPCR structures can be affected by ligand binding. The Galaxy7TM server, freely accessible at http://galaxy.seoklab.org/7TM, improves an input GPCR structure by simultaneous ligand docking and flexible structure refinement using GALAXY methods. The server shows better performance in both ligand docking and GPCR structure refinement than commonly used programs AutoDock Vina and Rosetta MPrelax, respectively.

show abstract

Downregulation of a cell polarity protein potentiates Chikungunya Virus infection in host cells

Kumar

Tatiya

Dey

et al. 2023

Preprint

View full text Add to dashboard Cite

Downregulation of the host cell pro-apoptotic pathways confers a selective advantage to viral pathogens, and many viruses interfere with such regulatory mechanisms in order to enhance their propagation in infected cells. The Scribble cell polarity complex, which is composed of multiple adapter proteins including human Scribble, Dlg and MAGI, controls a variety of host cell functionalities including apoptosis, morphology, polarity, signaling and migration. In the recent years, components from several viral pathogens, including oncogenic viruses, have been found to associate with and modulate the activities of this complex, particularly that of the pro-apoptotic protein Scribble. Here, we establish a critical role for the downregulation of Scribble expression for the potentiation of Chikungunya Virus (CHIKV) infection. CHIKV is a well-known mosquito-borne alphavirus, which has caused outbreaks in more than 100 countries and constitutes a global health hazard. While the majority of the CHIKV proteome is well characterized, the role of a small structural protein 6K, and its transframe variant, TF, which is generated from the 6K sequence by ribosomal slippage and frameshifting, is not established as yet. We show that TF triggers the punctation, ubiquitination and degradation of Scribble during CHIKV infection, and that the downregulation of Scribble during CHIKV infection. We show that the association of TF with the PDZ domains of Scribble is mediated through a PDZ-domain binding motif at the C-terminus of TF. Thus, our work establishes a role for the downregulation of Scribble in alphavirus infections for the first time, while allocating a novel role in host modulation to the mysterious 6K/TF component of alphaviruses.

show abstract

The Functional Complexity of [NiFe] Hydrogenases in Sulfate Reducing Bacteria (Genus; Desulforvibrio spp)

Cited by 4 publications

References 43 publications

GalaxyPepDock: a protein–peptide docking tool based on interaction similarity and energy optimization

GalaxyPepDock: a protein–peptide docking tool based on interaction similarity and energy optimization

Galaxy7TM: flexible GPCR–ligand docking by structure refinement

Downregulation of a cell polarity protein potentiates Chikungunya Virus infection in host cells

Contact Info

Product

Resources

About