Инд. авторы:	Gaydamaka A.A., Arkhipov S.G., Zakharov B.A., Seryotkin Y.V., Boldyreva E.V.
Заглавие:	Effect of pressure on slit channels in guanine sodium salt hydrate: a link to nucleobase intermolecular interactions
Библ. ссылка:	Gaydamaka A.A., Arkhipov S.G., Zakharov B.A., Seryotkin Y.V., Boldyreva E.V. Effect of pressure on slit channels in guanine sodium salt hydrate: a link to nucleobase intermolecular interactions // Crystengcomm. - 2019. - Vol.21. - Iss. 30. - P.4484-4492. - ISSN 1466-8033.
Внешние системы:	DOI: 10.1039/c9ce00476a; РИНЦ: 41622627; SCOPUS: 2-s2.0-85070073870; WoS: 000477776100005;
Реферат:	eng: The crystal structure of a hydrate of the sodium salt of guanine (2Na(+)center dot C5H3N5O2-center dot 7H(2)O) was studied using single-crystal X-ray diffraction and Raman spectroscopy up to similar to 2.5 GPa, after which the structure distorted and the diffraction pattern from single crystal fragments disappeared along with the appearance of powder ring fragments. On increasing the pressure the distances between the double walls of the slit channels formed by the guanine moieties became more equal, with the longer one shortening and the shorter one expanding. The topology of the Na+-water intra-channel infinite clusters was preserved, although these clusters became distorted on compression. Among several types of OH center dot center dot center dot O and OH center dot center dot center dot N hydrogen bonds, only two practically did not change with increasing pressure, namely the bonds connecting the guanine walls to the intra-channel water molecules. A possible relationship to the interactions in the ion channels with the walls formed by the guanine species in biological systems is discussed.
Ключевые слова:	VISUALIZATION; RAMAN; AMINO-ACIDS; PHASE-TRANSITIONS; CRYSTAL-STRUCTURE; X-RAY-DIFFRACTION; OXIDATIVE DNA-DAMAGE; NUCLEOSIDES;
Издано:	2019
Физ. характеристика:	с.4484-4492