Fragments of the HIV-1 Tat protein specifically bind TAR RNA.
Proteolytically produced carboxyl-terminal fragments of the human immunodeficiency virus type-1 (HIV-1) Tat protein that include a conserved region rich in arginine and lysine bind specifically to transactivation response RNA sequences (TAR). A chemically synthesized 14-residue peptide spanning the basic subdomain also recognizes TAR, identifying this subdomain as central for RNA interaction. TAR RNA forms a stable hairpin that includes a six-residue loop, a trinucleotide pyrimidine bulge, and extensive duplex structure. Competition and interference experiments show that the Tat-derived fragments bind to double-stranded RNA and interact specifically at the pyrimidine bulge and adjacent duplex of TAR.
Weeks
K M
KM
Department of Chemistry, Yale University, New Haven, CT.
Ampe
C
C
Schultz
S C
SC
Steitz
T A
TA
Crothers
D M
DM
D000595:Amino Acid Sequence; D001483:Base Sequence; D001667:Binding, Competitive; D015696:Gene Products, tat / Q000378:metabolism*; D015497:HIV-1 / Q000235:genetics*; D008969:Molecular Sequence Data; D009690:Nucleic Acid Conformation; D010446:Peptide Fragments / Q000302:isolation & purification / Q000378:metabolism; D010447:Peptide Hydrolases; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism*; D012367:RNA, Viral / Q000235:genetics / Q000378:metabolism*; D011993:Recombinant Fusion Proteins / Q000302:isolation & purification / Q000378:metabolism; D012045:Regulatory Sequences, Nucleic Acid / Q000235:genetics / Q000502:physiology; D013329:Structure-Activity Relationship; D015534:Trans-Activators / Q000378:metabolism*; D015533:Transcriptional Activation / Q000235:genetics; D054322:tat Gene Products, Human Immunodeficiency Virus
D015696:Gene Products, tat; D010446:Peptide Fragments; D012333:RNA, Messenger; D012367:RNA, Viral; D011993:Recombinant Fusion Proteins; D015534:Trans-Activators; D054322:tat Gene Products, Human Immunodeficiency Virus; D010447:Peptide Hydrolases