Upstream sequences within the terminal hairpin positively regulate the P6 promoter of B19 parvovirus.
For the B19 parvovirus P6 promoter, a 96-nt minimal truncation mutant retained activity in transient reporter gene assays. Deletion of sequences further upstream from this minimal promoter markedly diminished reporter activity in certain cell lines. This upstream region lies within the terminal hairpin from -249 to -157 and contains a 14-nt sequence that is protected by DNase I footprinting. The exact sequence is directly repeated further within the hairpin, suggesting a regulatory role. The hairpin termini of parvoviruses were known to serve as origins of replication and to catalyze virion packaging. We now suggest that, in addition to these functions, they exert cis-acting effects on B19 P6-promoted gene expression.
Clinical Hematology Branch, National Heart, Lung and Blood Institute, Bethesda, Maryland 20892.
J M
JM
Liu
S W
SW
Green
Y S
YS
Hao
K T
KT
McDonagh
N S
NS
Young
T
T
Shimada
D001483:Base Sequence; D002460:Cell Line; D015500:Chloramphenicol O-Acetyltransferase / Q000235:genetics / Q000378:metabolism; D002872:Chromosome Deletion; D004261:DNA Replication; D004279:DNA, Viral / Q000235:genetics; D003850:Deoxyribonuclease I; D015870:Gene Expression; D006367:HeLa Cells; D006801:Humans; D004915:Leukemia, Erythroblastic, Acute; D008156:Luciferases / Q000235:genetics / Q000378:metabolism; D008969:Molecular Sequence Data; D016254:Mutagenesis, Insertional; D009690:Nucleic Acid Conformation; D010321:Parvoviridae / Q000235:genetics*; D010957:Plasmids; D011401:Promoter Regions, Genetic; D011993:Recombinant Fusion Proteins / Q000235:genetics / Q000378:metabolism; D012045:Regulatory Sequences, Nucleic Acid; D014162:Transfection
D004279:DNA, Viral; D011993:Recombinant Fusion Proteins; D008156:Luciferases; D015500:Chloramphenicol O-Acetyltransferase; D003850:Deoxyribonuclease I