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Detection of Correlated Mutations
Ižák, Tomáš ; Bendl, Jaroslav (oponent) ; Martínek, Tomáš (vedoucí práce)
This work explores existing possibilities and methods of correlated mutations detection in proteins. At the beginning a theoretical background into explored area is provided. Exploitation of detected correlated mutations lies in a protein's tertiary structure prediction or searching functionally important sites. A state-of-the-art of existing tools and methods follows. In this work, methods based on statistics (for example Pearson correlation coefficient or Pearson's chi^2 test), Information theory (Mutual information - MI) and likelihood models (ELSC or Spidermonkey) are examined. The next part is devoted to the searching for an optimal algorithm for correlated mutations detection. To combine results from multiple different algorithms, is proposed as an optimal solution. It is also advised to exploit physico-chemical properties of amino acids during the detection. In practical part, the algorithm for detection of correlated mutations was developed. It is based on physico-chemical properties of amino acids and phylogenetic trees. Results gained using this method were compared with results gained from CAPS, CRASP and CMAT tools.
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Bioinformatic methods of detection of protein coevolution
Pařízková, Hana ; Schneider, Bohdan (vedoucí práce) ; Hampl, Vladimír (oponent)
Slovem koevoluce popisujeme stav, kdy dva či více druhů nebo biomolekul vzá- jemně ovlivňují svou evoluci. Na proteinové úrovni je koevoluce považována za jeden z hlavních mechanismů zajišťujících správné sbalení, interakce a funkci pro- teinů. Pozorována může být jak na úrovni interagujících proteinových rodin, tak na úrovni jednotlivých aminokyselinových residuí. Studium koevoluce může být užitečným nástrojem při predikci struktury proteinů, jejich funkce, interakčních partnerů, apod. V této práci jsou popsány algoritmy, které jsou používány k detekci koevoluce proteinů, stejně jako jejich možné aplikace a omezení. Klíčová slova: koevoluce, proteinová rodina, predikce struktury proteinů, in- terakční partneři, korelované mutace, mirrortree, vzájemná informace, analýza přímého párování
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Detection of Correlated Mutations
Ižák, Tomáš ; Bendl, Jaroslav (oponent) ; Martínek, Tomáš (vedoucí práce)
This work explores existing possibilities and methods of correlated mutations detection in proteins. At the beginning a theoretical background into explored area is provided. Exploitation of detected correlated mutations lies in a protein's tertiary structure prediction or searching functionally important sites. A state-of-the-art of existing tools and methods follows. In this work, methods based on statistics (for example Pearson correlation coefficient or Pearson's chi^2 test), Information theory (Mutual information - MI) and likelihood models (ELSC or Spidermonkey) are examined. The next part is devoted to the searching for an optimal algorithm for correlated mutations detection. To combine results from multiple different algorithms, is proposed as an optimal solution. It is also advised to exploit physico-chemical properties of amino acids during the detection. In practical part, the algorithm for detection of correlated mutations was developed. It is based on physico-chemical properties of amino acids and phylogenetic trees. Results gained using this method were compared with results gained from CAPS, CRASP and CMAT tools.
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