Kaposi's sarcoma herpesvirus C-terminal LANA concentrates at pericentromeric and peri-telomeric regions of a subset of mitotic chromosomes

Virology. 2007 Jan 20;357(2):149-57. doi: 10.1016/j.virol.2006.07.052. Epub 2006 Sep 18.

Abstract

The Kaposi's sarcoma-associated herpesvirus (KSHV) latency-associated nuclear antigen (LANA) tethers KSHV terminal repeat (TR) DNA to mitotic chromosomes to efficiently segregate episomes to progeny nuclei. LANA contains N- and C-terminal chromosome binding regions. We now show that C-terminal LANA preferentially concentrates to paired dots at pericentromeric and peri-telomeric regions of a subset of mitotic chromosomes through residues 996-1139. Deletions within C-terminal LANA abolished both self-association and chromosome binding, consistent with a requirement for self-association to bind chromosomes. A deletion abolishing TR DNA binding did not affect chromosome targeting, indicating LANA's localization is not due to binding its recognition sequence in chromosomal DNA. LANA distributed similarly on human and non-human mitotic chromosomes. These results are consistent with C-terminal LANA interacting with a cell factor that concentrates at pericentromeric and peri-telomeric regions of mitotic chromosomes.

Publication types

  • Research Support, N.I.H., Extramural

MeSH terms

  • Antigens, Viral / genetics
  • Antigens, Viral / metabolism*
  • Cell Line
  • Centromere / metabolism*
  • Chromosomes / metabolism
  • Chromosomes / virology*
  • DNA, Viral / chemistry
  • DNA, Viral / metabolism
  • DNA-Binding Proteins / metabolism
  • Herpesvirus 8, Human / genetics*
  • Herpesvirus 8, Human / physiology
  • Humans
  • Mitosis / genetics*
  • Nuclear Proteins / genetics
  • Nuclear Proteins / metabolism*

Substances

  • Antigens, Viral
  • DNA, Viral
  • DNA-Binding Proteins
  • Nuclear Proteins
  • latency-associated nuclear antigen