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Master's Dissertation
DOI
https://doi.org/10.11606/D.43.2011.tde-30092011-163810
Document
Author
Full name
Philippe Alexandre Divina Petersen
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2011
Supervisor
Committee
Petrilli, Helena Maria (President)
Ferreira, Ana Maria da Costa
Rentería, Mario
Title in Portuguese
Cálculos ab initio de interações entre Cd e bases nitrogenadas do DNA
Keywords in Portuguese
DFT
DNA
Doença de chagas
Gradiente de campo elétrico
Interações hiperfinas
Método PAW
Organometálicos
Abstract in Portuguese
As interações hiperfinas são uma ótima ferramenta para estudar um sítio específico e obter informações importantes sobre o sistema. No presente trabalho analisamos de forma teórica as propriedades eletrônicas, estruturais e hiper nas do Cádmio (Cd) ligado às bases nitrogenadas do DNA. A motivação surgiu da colaboração com o grupo do prof. Artur W. Carbonari do Instituto de Pesquisas Energéticas e Nucleares (IPEN) e que tem como objetivo investigar o DNA e anticorpos de linhagens de camundongos infectados pela cepa Y de Trypanosoma cruzi, protozoário causador da doença de Chagas. A técnica Time Differential Perturbed Angular Correlation (TDPAC) foi utilizada para obter as medidas das interações hiperfinas do DNA. O núcleo de prova das medidas foi o 111Cd. Utilizamos uma abordagem quântica ab initio all-electron, dentro da Teoria do Funcional da Densidade (DFT), através do código computacional CP-PAW que combina o método Projector Augmented Wave (PAW) e a dinâmica molecular quântica de Car-Parrinello (CPMD). Ressaltamos que, até o presente momento, nenhum estudo com esta abordagem teórica e com este código computacional foi realizado para investigar as propriedades hiper nas do Cd ligado as bases nitrogenadas do DNA.
Title in English
Ab Initio calculations of interactions betweeen Cd and nitrogenous bases o DNA
Keywords in English
Chagas disease
DFT
DNA
Electric field gradient
Hyperfine interactions
Organometallic
PAW method
Abstract in English
The Hyperfine interactions are good tools to study speci c sites and obtain important information about a given system. In this work we study electronic, structural and hyper ne properties of the Cadmium (Cd) coordinated to the DNA nitrogenous bases. The motivation for this study arose from a collaboration with the group of prof. Arthur W. Carbonari at the Institute of Energy and Nuclear Research (IPEN), which aims to investigate DNA and antibodies to strains of mice infected with the Trypanosoma cruzi, the protozoan that causes Chagas disease. The Time Differential Perturbed Angular Correlation (TDPAC) technique was used to obtain hypefine interactions measurements at a Cd probe bonded to DNA. We use ab initio all-electron calculations, within the Density Functional Theory (DFT) and we use the computer code CP-PAW that combines the Projector Augmented Wave (PAW) method and the Car-Parrinello (CP) quantum molecular dynamics approach to. We emphasize that, until now, no study with this theorectical approach and with this computer code was conducted to investigate the hyper ne properties of the Cd binding to the DNA bases.
 
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Petersen.pdf (5.88 Mbytes)
Publishing Date
2011-11-18
 
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