Biology subjects

Sheik Amamuddy, O.

Publications and source records attributed to Sheik Amamuddy, O..

3 recordsLinked to original sources

bioRxiv2021

MDM-TASK-web: A web platform for protein dynamic residue networks and modal analysis

MDM-TASK-web is the web server for the MD-TASK and MODE-TASK software suites. It simplifies the set-up required to perform and visualize results from dynamic residue network analysis, perturbation-response scanning, dynamic cross-correlation, essential dynamics and normal mode analysis. In a nutshell, the server gives access to updated versions of the tool suites, and offers new functionalities and integrated 2D/3D visualization. An embedded work-flow, integrated documentation and visualization tools shortens the number of steps to follow, starting from calculations to result visualization. The web server (available at https://mdmtaskweb.rubi.ru.ac.za/) is powered by Django and a MySQL database, and is compatible with all major web browsers. All scripts implemented in the web platform are freely available at https://github.com/RUBi-ZA/MD-TASK/tree/mdm-task-web and https://github.com/RUBi-ZA/MODE-TASK/tree/mdm-task-web. HighlightsO_LIMDM-TASK-web is the web server for highly utilized MD-TASK and MODE-TASK with updates C_LIO_LIEight residue network centrality metrics are available to analyze static and dynamic proteins C_LIO_LINovel comparative essential dynamics is established to compare independent MD simulations C_LIO_LICommunication propensity tool to evaluate residue communication efficiency is implemented. C_LIO_LINormal mode analysis from static and protein MD simulations is provided C_LI

bioinformatics↗

bioRxiv2018

Characterizing drug resistance using geometric ensembles from HIV protease dynamics

The use of antiretrovirals (ARVs) has drastically improved the life quality and expectancy of HIV patients since their introduction in health care. Several millions are still afflicted worldwide by HIV and ARV resistance is a constant concern for both healthcare practitioners and patients, as while treatment options are finite, the virus constantly adapts and selects for resistant viral strains under the pressure of drug treatment. The HIV protease is a crucial enzyme that processes viral polyproteins into their functional form, and has been a game changing drug target since the first application. Due to similarities in protease inhibitor designs, drug cross-resistance is not uncommon across ARVs of the same class. It is known that resistance against protease inhibitors is associated with a wider active site, but results from our large scale molecular dynamics analysis further show, for the first time, that there are regions of local expansions and compactions associated with high levels of resistance conserved across eight different protease inhibitors visible in their complexed form in closed receptor conformations. The method developed here is novel, supplementary to the methods of nonsynonymous mutation analysis, and should be applicable in analyzing the structural consequences of mutations in other contexts.

bioinformatics↗

bioRxiv2017

MODE-TASK: Large-scale protein motion tools

SummaryMODE-TASK, a novel software suite, comprises Principle Component Analysis, Multidimensional Scaling, and t-Distributed Stochastic Neighbor Embedding techniques using molecular dynamics trajectories. MODE-TASK also includes a Normal Mode Analysis tool based on Anisotropic Network Model so as to provide a variety of ways to analyse and compare large-scale motions of protein complexes for which long MD simulations are prohibitive.\n\nAvailability and ImplementationMODE-TASK has been open-sourced, and is available for download from https://github.com/RUBi-ZA/MODE-TASK, implemented in Python and C++.\n\nSupplementary informationDocumentation available at http://mode-task.readthedocs.io.

bioinformatics↗