Synthesis of peptide-oligonucleotide conjugates with single and multiple peptides attached to 2'-aldehydes through thiazolidine, oxime, and hydrazine linkages.
2'-Deoxyoligonucleotides and 2'-O-methyloligoribonucleotides carrying one or more 2'-aldehyde groups were synthesized and coupled to peptides containing an N-terminal cysteine, aminooxy, or hydrazide group to give peptide-oligonucleotide conjugates incorporating single or multiple peptides in good yield. The facile conjugation method allows specific coupling in aqueous solution of unprotected oligonucleotides containing aldehyde groups to unprotected N-terminally modified peptides and other small molecules. A 12-mer 2'-O-methyloligoribonucleotide complementary to the HIV-1 TAR RNA stem-loop and containing two conjugated copies of an 8-mer model laminin peptide was hardly affected in TAR RNA binding and showed a similar level of inhibition of HIV-1 Tat-dependent in vitro transcription compared to the unconjugated 2'-O-methyloligoribonucleotide. Advantages of this conjugation method include (1) the ability to attach more than one peptide or other small molecule to oligonucleotide at defined nucleoside residue locations; (2) a conjugation route that does not affect significantly oligonucleotide binding to RNA structures; and (3) three alternative, facile, and mild conjugation reaction types that do not require use of a large excess of peptide reagent.
Chemistry Department and A. N. Belozersky Institute of Physico-Chemical Biology, M. V. Lomonosov Moscow State University, Moscow, 119899, Russia.
Timofei S
TS
Zatsepin
Dmitry A
DA
Stetsenko
Andrey A
AA
Arzumanov
Elena A
EA
Romanova
Michael J
MJ
Gait
Tatiana S
TS
Oretskaya
D000447:Aldehydes / Q000737:chemistry*; D019380:Anti-HIV Agents / Q000138:chemical synthesis* / Q000494:pharmacology; D002474:Cell-Free System; D003432:Cross-Linking Reagents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D015696:Gene Products, tat / Q000037:antagonists & inhibitors / Q000235:genetics; D016325:HIV Long Terminal Repeat / Q000235:genetics; D006834:Hydrazines / Q000737:chemistry; D009693:Nucleic Acid Hybridization; D009841:Oligonucleotides / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D009842:Oligopeptides / Q000138:chemical synthesis / Q000737:chemistry; D010091:Oximes / Q000737:chemistry; D020135:Peptide Nucleic Acids / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D013844:Thiazoles / Q000737:chemistry; D014158:Transcription, Genetic / Q000187:drug effects
D000447:Aldehydes; D019380:Anti-HIV Agents; D003432:Cross-Linking Reagents; D015696:Gene Products, tat; D006834:Hydrazines; D009841:Oligonucleotides; D009842:Oligopeptides; D010091:Oximes; D020135:Peptide Nucleic Acids; D013844:Thiazoles