Dichroizm kołowy kwasów nukleinowych. Cz.2. Polimery

Boczkowska, M.

Artykuł - szczegóły

Tytuł artykułu

Dichroizm kołowy kwasów nukleinowych. Cz.2. Polimery

Autorzy

Boczkowska M.

Wybrane pełne teksty z tego czasopisma

Identyfikatory

Warianty tytułu

Circular dichroism of nucleic acids. Part 2. Polymers

Języki publikacji

Abstrakty

The review presents the theoretical basis for interpretations of CD spectra of polynucleotides. A simplified version of quantum theory of circular dichroism of a polynucleotide by Tinoco and Johnson is presented in details. It is generally assumed that the optical activity of these polymers is dominated by interactions between dipoles of in-plane transitions occuring at neighbouring bases. The interaction of dipoles coming from different bases strictly depends on geometrical arrangement of bases within the helix. As a result information about geometry of the helix can be inferred from the CD spectra. The circular dichroism caused by the disturbance of the electronic system of a base by the presence of a sugar ring is usually omitted in calculations. Such a theoretical approach allows to understand differences between CD spectra of random DNA and RNA. The distance of a base pair from helix axis appeared to be the main factor responsible for these differences]. The approach fails in a case of polymers of non-random sequences, for example containing a repetitive motif of two bases. It is exemplified for the d(CG)n oligomers forming left-handed double helix called Z-DNA, where none of the theoretical calculations is able to predict the inversion of a CD spectrum characteristic for the Z form .

Słowa kluczowe

dichroizm kołowy kwas nukleinowy polimery aktywność optyczna

circular dichroism nucleic acids polymers

Wydawca

Polskie Towarzystwo Chemiczne

Czasopismo

Wiadomości Chemiczne

Rocznik

2002

Tom

[Z] 56, 3-4

Strony

203--221

Opis fizyczny

wykr., bibliogr. 41 poz.

Twórcy

autor

Boczkowska M.

Centrum Badań Molekularnych i Makromolekularnych PAN ul. Sienkiewicza 112, 90-363 Łódź

Centrum Badań Molekularnych i Makromolekularnych PAN ul. Sienkiewicza 112, 90-363 Łódź

Bibliografia

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Typ dokumentu

Bibliografia

Identyfikator YADDA

bwmeta1.element.baztech-article-BUS1-0010-0058