A chemical synthesis of LNA-2,6-diaminopurine riboside, and the influence of 2'-O-methyl-2,6-diaminopurine and LNA-2,6-diaminopurine ribosides on the thermodynamic properties of 2'-O-methyl RNA/RNA heteroduplexes.
A chemical synthesis of LNA-2,6-diaminopurine riboside, and the influence of 2'-O-methyl-2,6-diaminopurine and LNA-2,6-diaminopurine ribosides on the thermodynamic properties of 2'-O-methyl RNA/RNA heteroduplexes.
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DOI:
10.1093/nar/gkm421
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发表时间:
2007
影响因子:
14.9
通讯作者:
Kierzek R
中科院分区:
文献类型:
--
作者:
Pasternak A;Kierzek E;Pasternak K;Turner DH;Kierzek R
Modified nucleotides are useful tools to study the structures, biological functions and chemical and thermodynamic stabilities of nucleic acids. Derivatives of 2,6-diaminopurine riboside (D) are one type of modified nucleotide. The presence of an additional amino group at position 2 relative to adenine results in formation of a third hydrogen bond when interacting with uridine. New method for chemical synthesis of protected 3′-O-phosphoramidite of LNA-2,6-diaminopurine riboside is described. The derivatives of 2′-O-methyl-2,6-diaminopurine and LNA-2,6-diaminopurine ribosides were used to prepare complete 2′-O-methyl RNA and LNA-2′-O-methyl RNA chimeric oligonucleotides to pair with RNA oligonucleotides. Thermodynamic stabilities of these duplexes demonstrated that replacement of a single internal 2′-O-methyladenosine with 2′-O-methyl-2,6-diaminopurine riboside (DM) or LNA-2,6-diaminopurine riboside (DL) increases the thermodynamic stability (ΔΔG°37) on average by 0.9 and 2.3 kcal/mol, respectively. Moreover, the results fit a nearest neighbor model for predicting duplex stability at 37°C. D-A and D-G but not D-C mismatches formed by DM or DL generally destabilize 2′-O-methyl RNA/RNA and LNA-2′-O-methyl RNA/RNA duplexes relative to the same type of mismatches formed by 2′-O-methyladenosine and LNA-adenosine, respectively. The enhanced thermodynamic stability of fully complementary duplexes and decreased thermodynamic stability of some mismatched duplexes are useful for many RNA studies, including those involving microarrays.
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影响因子:
56.9
作者:
Lagos-Quintana, M;Rauhut, R;Tuschl, T
通讯作者:
Tuschl, T
影响因子:
3.6
作者:
Koshkin, AA
通讯作者:
Koshkin, AA
影响因子:
2.1
作者:
Koshkin, AA;Singh, SK;Wengel, J
通讯作者:
Wengel, J
影响因子:
2.1
作者:
GAFFNEY, BL;MARKY, LA;JONES, RA
通讯作者:
JONES, RA
影响因子:
14.9
作者:
Kierzek, Elzbieta;Mathews, David H.;Ciesielska, Anna;Turner, Douglas H.;Kierzek, Ryszard
通讯作者:
Kierzek, Ryszard