Microhydration of guanine base pairs

被引：41

作者：

Abo-Riziq, A ^{[1
]}

Crews, B ^{[1
]}

Grace, L ^{[1
]}

de Vries, MS ^{[1
]}

机构：

[1] Univ Calif Santa Barbara, Dept Chem & Biochem, Santa Barbara, CA 93106 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2005年 / 127卷 / 08期

关键词：

D O I：

10.1021/ja043000y

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report spectroscopy of clusters of guanine base pairs with one and two water molecules. We recorded the vibronic spectra of the mass-selected GG(H2O) and GG(H2O)2 clusters using resonant two photon ionization (R2PI) and we used IR-UV double resonance spectroscopy to obtain ground state IR spectra of these clusters. We found that a single water molecule stabilizes one of two structures we had previously found for guanine dimers. Addition of a second water molecule causes no further structural change. Copyright © 2005 American Chemical Society.

引用

页码：2374 / 2375

页数：2

共 15 条

[1] Photochemical selectivity in guanine-cytosine base-pair structures [J].

Abo-Riziq, A ;

Grace, L ;

Nir, E ;

Kabelac, M ;

Hobza, P ;

de Vries, MS .

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2005, 102 (01) :20-23

[2] Gas phase rotamers of the nucleobase 9-methylguanine enol and its monohydrate: Optical spectroscopy and quantum mechanical calculations [J].

Chin, W ;

Mons, M ;

Piuzzi, F ;

Tardivel, B ;

Dimicoli, I ;

Gorb, L ;

Leszczynski, J .

JOURNAL OF PHYSICAL CHEMISTRY A, 2004, 108 (40) :8237-8243

Hanus, M ;

Ryjacek, F ;

Kabelac, M ;

Kubar, T ;

Bogdan, TV ;

Trygubenko, SA ;

Hobza, P .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2003, 125 (25) :7678-7688

[4] Photophysics of methyl-substituted uracils and thymines and their water complexes in the gas phase [J].

He, YG ;

Wu, CY ;

Kong, W .

JOURNAL OF PHYSICAL CHEMISTRY A, 2004, 108 (06) :943-949

[5] True stabilization energies for the optimal planar hydrogen-bonded and stacked structures of guanine•••cytosine, adenine•••thymine, and their 9-and 1-methyl derivatives:: Complete basis set calculations at the MP2 and CCSD(T) levels and comparison with experiment [J].

Jurecka, P ;

Hobza, P .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2003, 125 (50) :15608-15613

[6] Already two water molecules change planar H-bonded structures of the adenine•••thymine base pair to the stacked ones:: a molecular dynamics simulations study [J].

Kabelác, M ;

Ryjácek, F ;

Hobza, P .

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2000, 2 (21) :4906-4909

[7]

Kabelác M, 2001, CHEM-EUR J, V7, P2067, DOI 10.1002/1521-3765(20010518)7:10<2067::AID-CHEM2067>3.0.CO

[8]

2-S

[9] Femtosecond real time dynamics of hydrogen bond dissociation in photoexcited adenine-water clusters [J].

Kang, H ;

Lee, KT ;

Kim, SK .

CHEMICAL PHYSICS LETTERS, 2002, 359 (3-4) :213-219

[10] Cluster beam chemistry: Hydration of nucleic acid bases; Ionization potentials of hydrated adenine and thymine [J].

Kim, SK ;

Lee, W ;

Herschbach, DR .

JOURNAL OF PHYSICAL CHEMISTRY, 1996, 100 (19) :7933-7937

← 1 2 →