BMD409: Structural Bioinformatics Lecture 5 - Protein Structure Modeling
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Questions and Answers

What is the primary goal of protein threading in structure modeling?

  • To identify the fold of proteins with unknown structures (correct)
  • To model proteins with known structures
  • To determine the sequence of proteins with known folds
  • To predict the structure of proteins without known structures

What is the difference between ab initio modeling and template-based modeling?

  • Ab initio modeling does not use known structures, while template-based modeling does (correct)
  • Ab initio modeling uses known structures, while template-based modeling does not
  • Ab initio modeling is used for protein sequencing, while template-based modeling is for protein structure prediction
  • Ab initio modeling is used for protein structure prediction, while template-based modeling is for protein sequencing

What is the term used to describe the collection of proteins used in protein threading?

  • Sequence archive
  • Protein repository
  • Fold library (correct)
  • Structure database

What is the purpose of the 'goodness of fit' score in protein threading?

<p>To evaluate the alignment of the target sequence with the template structures (C)</p> Signup and view all the answers

Which of the following methods is used when there is no available structure for a protein?

<p>Ab initio modeling (C)</p> Signup and view all the answers

What is the basis of the 'goodness of fit' score in protein threading?

<p>Empirical energy function based on statistics derived from known protein structures (A)</p> Signup and view all the answers

What is a crucial aspect of successful ab initio modeling?

<p>An efficient search method (C)</p> Signup and view all the answers

What is the primary purpose of ab initio modeling?

<p>To understand the folding process of proteins (C)</p> Signup and view all the answers

What type of scoring function is particularly useful in protein threading?

<p>Scoring function with pairwise and solvation terms (D)</p> Signup and view all the answers

What is the main difference between fragment-based and biophysics-based ab initio modeling methods?

<p>The type of energy function used (B)</p> Signup and view all the answers

What is the advantage of using ab initio modeling over template-based modeling?

<p>Ab initio modeling can be used for proteins with no known homologs (C)</p> Signup and view all the answers

What is the role of molecular mechanics and quantum mechanics in protein engineering?

<p>To improve the accuracy of scoring functions (C)</p> Signup and view all the answers

What is the primary goal of ab initio modeling approaches in protein structure prediction?

<p>To build protein structures from small structural pieces (D)</p> Signup and view all the answers

What is the process of finding the conformation of a protein that minimizes its total energy?

<p>Energy minimization (B)</p> Signup and view all the answers

What is the purpose of gathering a collection of known protein structures in protein threading?

<p>To serve as templates for modeling (B)</p> Signup and view all the answers

What is the primary difference between ab initio modeling and template-based modeling?

<p>The use of homologous structures or templates (C)</p> Signup and view all the answers

What is the purpose of choosing the best-fitting template in template-based modeling?

<p>To construct a model of the target protein based on the alignment (D)</p> Signup and view all the answers

What is the goal of protein threading?

<p>To model proteins by aligning their sequences with known protein folds and calculating a goodness-of-fit score (B)</p> Signup and view all the answers

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