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. 2001 Dec 20;291(2):241-59.
doi: 10.1006/viro.2001.1202.

The Kaposi's sarcoma-associated herpesvirus latency-associated nuclear antigen binds to specific sequences at the left end of the viral genome through its carboxy-terminus

M A Cotter 2nd  1 , C Subramanian, E S Robertson
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Free article

The Kaposi's sarcoma-associated herpesvirus latency-associated nuclear antigen binds to specific sequences at the left end of the viral genome through its carboxy-terminus

M A Cotter 2nd et al. Virology. .
Free article

Abstract

Latent infection by members of the gammaherpesvirus family is typically characterized by stable episomal maintenance of genomic viral DNA. In the case of Epstein--Barr virus (EBV), this is dependent upon binding of the Epstein-Barr nuclear antigen 1 (EBNA1) to sites which lie within the origin of plasmid replication (OriP). The recently discovered Kaposi's sarcoma-associated herpesvirus (KSHV) encodes the latency-associated nuclear antigen (LANA), which appears to be important for supporting the latent infection of human cells by KSHV. The present work describes site-specific binding of the LANA protein to multiple different elements at the left end of the genome, a region which appears to be critical for maintenance of KSHV episomes. Of the three sites, terminal LANA-binding region 4 (TLBR4) binds LANA with the highest affinity when compared to the other sites. Further characterization of this cis-acting element by mutagenesis studies indicates that the minimal TLBR4-binding sequence is represented by a 13-bp sequence 5prime prime or minute CGCCCGGGCATGG 3prime prime or minute. Furthermore, this specific binding to TLBR4 was mediated by the distal 200 amino acid C-terminus of the LANA protein.

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