Protein interactions targeting the latency-associated nuclear antigen of Kaposi's sarcoma-associated herpesvirus to cell chromosomes.

Abstract:

:Maintenance of Kaposi's sarcoma-associated herpesvirus (KSHV) latent infection depends on the viral episomes in the nucleus being distributed to daughter cells following cell division. The latency-associated nuclear antigen (LANA) is constitutively expressed in all KSHV-infected cells. LANA binds sequences in the terminal repeat regions of the KSHV genome and tethers the viral episomes to chromosomes. To better understand the mechanism of chromosomal tethering, we performed glutathione S-transferase (GST) affinity and yeast two-hybrid assays to identify LANA-interacting proteins with known chromosomal association. Two of the interactors were the methyl CpG binding protein MeCP2 and the 43-kDa protein DEK. The interactions of MeCP2 and DEK with LANA were confirmed by coimmunoprecipitation. The MeCP2-interacting domain was mapped to the previously described chromatin binding site in the N terminus of LANA, while the DEK-interacting domain mapped to LANA amino acids 986 to 1043 in the C terminus. LANA was unable to associate with mouse chromosomes in chromosome spreads of transfected NIH 3T3 cells. However, LANA was capable of targeting to mouse chromosomes in the presence of human MeCP2 or DEK. The data indicate that LANA is tethered to chromosomes through two independent chromatin binding domains that interact with different protein partners.

journal_name

J Virol

journal_title

Journal of virology

authors

Krithivas A,Fujimuro M,Weidner M,Young DB,Hayward SD

doi

10.1128/jvi.76.22.11596-11604.2002

subject

Has Abstract

pub_date

2002-11-01 00:00:00

pages

11596-604

issue

22

eissn

0022-538X

issn

1098-5514

journal_volume

76

pub_type

杂志文章