title: RFHVMn ORF73 is structurally related to the KSHV ORF73 latency-associated nuclear antigen (LANA) and is expressed in retroperitoneal fibromatosis (RF) tumor cells.
abstract: Retroperitoneal fibromatosis herpesvirus (RFHV), the macaque homolog of the human rhadinovirus, Kaposi's sarcoma-associated herpesvirus (KSHV), was first identified in retroperitoneal fibromatosis (RF) tumor lesions of macaques with simian AIDS. We cloned and sequenced the ORF73 latency-associated nuclear antigen (LANA) of RFHVMn from the pig-tailed macaque. RFHVMn LANA is structurally analogous to KSHV ORF73 LANA and contains an N-terminal serine-proline-rich region, a large internal glutamic acidic-rich repeat region and a conserved C-terminal domain. RFHVMn LANA reacts with monoclonal antibodies specific for a glutamic acid-proline dipeptide motif and a glutamic acid-glutamine-rich motif in the KSHV LANA repeat region. Immunohistochemical and immunofluorescence analysis revealed that RFHVMn LANA is a nuclear antigen which is highly expressed in RF spindloid tumor cells. These data suggest that RFHV LANA is an ortholog of KSHV LANA and will function similarly to maintain viral latency and play a role in tumorigenicity in macaques.
authors.affiliation: Department of Pathobiology, School of Public Health and Community Medicine, HSB Rm F161E, Box 357238, University of Washington, Seattle, WA 98195, USA.
authors.forename: Kellie L
authors.initials: KL
authors.lastname: Burnside
authors.forename: Jonathan T
authors.initials: JT
authors.lastname: Ryan
authors.forename: Helle
authors.initials: H
authors.lastname: Bielefeldt-Ohmann
authors.forename: A
authors.initials: A
authors.lastname: Gregory Bruce
authors.forename: Margaret E
authors.initials: ME
authors.lastname: Thouless
authors.forename: Che-Chung
authors.initials: CC
authors.lastname: Tsai
authors.forename: Timothy M
authors.initials: TM
authors.lastname: Rose
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D000911:Antibodies, Monoclonal; D000956:Antigens, Viral / Q000737:chemistry / Q000235:genetics* / Q000276:immunology / Q000378:metabolism; D002467:Cell Nucleus / Q000737:chemistry; D003001:Cloning, Molecular; D004279:DNA, Viral / Q000737:chemistry / Q000235:genetics; D005350:Fibroma / Q000473:pathology / Q000821:virology*; D007150:Immunohistochemistry; D008254:Macaca nemestrina; D008856:Microscopy, Fluorescence; D008969:Molecular Sequence Data; D009687:Nuclear Proteins / Q000737:chemistry / Q000235:genetics* / Q000276:immunology / Q000378:metabolism; D016366:Open Reading Frames; D017433:Protein Structure, Secondary; D017434:Protein Structure, Tertiary; D012186:Retroperitoneal Neoplasms / Q000821:virology*; D018144:Rhadinovirus / Q000235:genetics* / Q000302:isolation & purification; D017422:Sequence Analysis, DNA; D017386:Sequence Homology, Amino Acid; D014407:Tumor Cells, Cultured
chemical_list: D000911:Antibodies, Monoclonal; D000956:Antigens, Viral; D004279:DNA, Viral; D009687:Nuclear Proteins; C109540:latency-associated nuclear antigen