title: Identification of a nucleotide binding site in HIV-1 integrase.
abstract: HIV-1 integrase is essential for viral replication and can be inhibited by antiviral nucleotides. Photoaffinity labeling with the 3'-azido-3'-deoxythymidine (AZT) analog 3',5-diazido-2', 3'-dideoxyuridine 5'-monophosphate (5N3-AZTMP) and proteolytic mapping identified the amino acid 153-167 region of integrase as the site of photocrosslinking. Docking of 5N3-AZTMP revealed the possibility for strong hydrogen bonds between the inhibitor and lysines 156, 159, and 160 of the enzyme. Mutation of these residues reduced photocrosslinking selectively. This report elucidates the binding site of a nucleotide inhibitor of HIV-1 integrase, and possibly a component of the enzyme polynucleotide binding site.
authors.affiliation: Department of Biochemistry and Molecular Biology, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA. drakerichardr@exchange.uams.edu
authors.forename: R R
authors.initials: RR
authors.lastname: Drake
authors.forename: N
authors.initials: N
authors.lastname: Neamati
authors.forename: H
authors.initials: H
authors.lastname: Hong
authors.forename: A A
authors.initials: AA
authors.lastname: Pilon
authors.forename: P
authors.initials: P
authors.lastname: Sunthankar
authors.forename: S D
authors.initials: SD
authors.lastname: Hume
authors.forename: G W
authors.initials: GW
authors.lastname: Milne
authors.forename: Y
authors.initials: Y
authors.lastname: Pommier
mesh_terms: D000345:Affinity Labels; D000595:Amino Acid Sequence; D001483:Base Sequence; D001665:Binding Sites; D003198:Computer Simulation; D017124:Conserved Sequence; D017931:DNA Primers; D054306:Dideoxynucleotides; D019427:HIV Integrase / Q000737:chemistry* / Q000378:metabolism*; D015497:HIV-1 / Q000201:enzymology / Q000502:physiology*; D006860:Hydrogen Bonding; D008239:Lysine; D008958:Models, Molecular; D016297:Mutagenesis, Site-Directed; D010446:Peptide Fragments / Q000737:chemistry; D017433:Protein Structure, Secondary; D011994:Recombinant Proteins / Q000737:chemistry / Q000378:metabolism; D013942:Thymine Nucleotides / Q000737:chemistry / Q000494:pharmacology*; D014779:Virus Replication; D015215:Zidovudine / Q000031:analogs & derivatives* / Q000737:chemistry / Q000494:pharmacology
chemical_list: D000345:Affinity Labels; D017931:DNA Primers; D054306:Dideoxynucleotides; D010446:Peptide Fragments; D011994:Recombinant Proteins; D013942:Thymine Nucleotides; C057287:3'-azido-3'-deoxythymidine 5'phosphate; D015215:Zidovudine; D019427:HIV Integrase; D008239:Lysine