Characterization of the minimal replicator of Kaposi's sarcoma-associated herpesvirus latent origin.
The latency-associated nuclear antigen (LANA) of Kaposi's sarcoma-associated herpesvirus (KSHV) binds to two sites within the 801-bp-long terminal repeat (TR) and is the only viral protein required for episomal maintenance. While two or more copies of TR are required for long-term maintenance, a single TR confers LANA-dependent origin activity on plasmid DNA. Deletion mapping revealed a 71-bp-long minimal replicator containing two distinctive sequence elements: LANA binding sites (LBS1/2) and an adjacent 29- to 32-bp-long GC-rich sequence which we termed the replication element. Furthermore, the transcription factor Sp1 can bind to TR outside the minimal replicator and contributes to TR's previously reported enhancer activity.
Hu
Jianhong
J
Division of Hematology/Oncology and Department of Molecular Genetics and Microbiology, Case Western Reserve University, Cleveland, OH, USA.
Renne
Rolf
R
D000956:Antigens, Viral / Q000502:physiology; D004261:DNA Replication; D004279:DNA, Viral / Q000378:metabolism*; D004742:Enhancer Elements, Genetic / Q000235:genetics; D019288:Herpesvirus 8, Human / Q000235:genetics / Q000502:physiology*; D006801:Humans; D009687:Nuclear Proteins / Q000502:physiology; D018741:Replication Origin / Q000235:genetics / Q000502:physiology*; D012514:Sarcoma, Kaposi / Q000821:virology; D020079:Terminal Repeat Sequences / Q000235:genetics; D017735:Virus Latency / Q000502:physiology*
D000956:Antigens, Viral; D004279:DNA, Viral; D009687:Nuclear Proteins; C109540:latency-associated nuclear antigen