The mid-IR spectra of 9-ethyl guanine, guanosine, and 2-deoxyguanosine.

نویسندگان

  • Ali Abo-riziq
  • Bridgit O Crews
  • Isabelle Compagnon
  • Jos Oomens
  • Gerard Meijer
  • Gert Von Helden
  • Martin Kabelac
  • Pavel Hobza
  • Mattanjah S de Vries
چکیده

We present the mid-IR (400-1800 cm(-1)) spectra of 9-ethyl guanine, guanosine, and 2-deoxyguanosine measured by IR-UV double-resonance spectroscopy. We compare the recorded mid-IR spectra with the spectra of the most stable structures obtained from RI-MP2 and RI-DFT-D calculations. The results confirm the enol form for all structures and demonstrate the efficacy of a new approach to DFT calculations that includes dispersion interactions.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Conformers of guanosines and their vibrations in the electronic ground and excited states, as revealed by double-resonance spectroscopy and ab initio calculations.

Because of their biological importance the DNA bases have been the subject of many theoretical and experimental investigations. In the gas phase the intrinsic properties of the bases can be studied at vibrational or even rotational resolution without intermolecular interactions. Though small, these molecules are difficult to vaporize without extensive decomposition. Recently, the vibronic spect...

متن کامل

The alkylation of 2'-deoxyguanosine and of thymidine with diazoalkanes. Some observations on o-alkylation.

The reaction in ether-methanol between 2'-deoxyguanosine and diazomethane or its ethyl or n-butyl homologue gives 1-, O(6)- and 7-alkyl-2'-deoxyguanosine. N(2),O(6)-Dimethyl-2'-deoxyguanosine was also detected. The hydrolysis of the methyl and the ethyl derivatives gives the corresponding alkylguanines: the O(6)-alkyl-2'-deoxyguanosines were sequentially hydrolysed, first to 2-amino-6-alkoxypur...

متن کامل

8-Oxo-7,8-dihydro-2'-deoxyguanosine Forms a Relatively Unstable Tetrameric Structure Compared with 2'-Deoxyguanosine

The hydrogen-bonded guanine tetrad, or G-quartet has been implicated in a variety of biological roles, including the function of chromosome telomeres. Here effect of the hydroxylation of guanosine at the 8 position on the G-quartet formation was examined. Electrospray inonization mass (ESI-MS) spectra of 8-oxo-7,8-dihydro-2'-deoxyguanosine (8-oxodG) and 2'-deoxyguanosine (dG) were measured in o...

متن کامل

2'-deoxyguanosine toxicity for B and mature T lymphoid cell lines is mediated by guanine ribonucleotide accumulation.

Inherited deficiency of the enzyme purine nucleoside phosphorylase (PNP) results in selective and severe T lymphocyte depletion which is mediated by its substrate, 2'-deoxyguanosine. This observation provides a rationale for the use of PNP inhibitors as selective T cell immunosuppressive agents. We have studied the relative effects of the PNP inhibitor 8-aminoguanosine on the metabolism and gro...

متن کامل

Electrochemical and Spectroscopic Studies of Interactions of Mn(III) Complexes with Nucleic Bases and Nucleosides

The complexes of Mn(OAc)3 and/or Mn(acac)3 with nucleic bases and nucleosides (adenine, guanine, xanthine, adenosine and guanosine) have been synthesized in nonaqueous solution. Polarographic and spectroscopic (IR and Visible) methods have been used to establish the active site(s) on the imidazole and pyrimidine rings in the nucleic bases and nucleosides for the intera...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • The journal of physical chemistry. A

دوره 111 31  شماره 

صفحات  -

تاریخ انتشار 2007