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Titolo:
EPSTEIN-BARR-VIRUS INFECTION INDUCES EXPRESSION IN B-LYMPHOCYTES OF ANOVEL GENE ENCODING AN EVOLUTIONARILY CONSERVED 55-KILODALTON ACTIN-BUNDLING PROTEIN
Autore:
MOSIALOS G; YAMASHIRO S; BAUGHMAN RW; MATSUDAIRA P; VARA L; MATSUMURA F; KIEFF E; BIRKENBACH M;
Indirizzi:
BRIGHAM & WOMENS HOSP,DIV INFECT DIS,75 FRANCIS ST BOSTON MA 02115 HARVARD UNIV,SCH MED,DEPT MED BOSTON MA 02115 HARVARD UNIV,SCH MED,DEPT MOLEC GENET & MICROBIOL BOSTON MA 02115 HARVARD UNIV,SCH MED,DEPT NEUROBIOL BOSTON MA 02115 RUTGERS STATE UNIV,DEPT MOLEC BIOL & BIOCHEM PISCATAWAY NJ 08854 MIT,WHITEHEAD INST BIOMED RES CAMBRIDGE MA 02142 MIT,DEPT BIOL CAMBRIDGE MA 02142
Titolo Testata:
Journal of virology
fascicolo: 11, volume: 68, anno: 1994,
pagine: 7320 - 7328
SICI:
0022-538X(1994)68:11<7320:EIIEIB>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
NUCLEAR ANTIGEN-2; KINASE-C; LYMPHOMA-CELLS; MEMBRANE; ACTIVATION; SUBSTRATE; CD23; FILOPODIA; EBNA-2; GAP-43;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
35
Recensione:
Indirizzi per estratti:
Citazione:
G. Mosialos et al., "EPSTEIN-BARR-VIRUS INFECTION INDUCES EXPRESSION IN B-LYMPHOCYTES OF ANOVEL GENE ENCODING AN EVOLUTIONARILY CONSERVED 55-KILODALTON ACTIN-BUNDLING PROTEIN", Journal of virology, 68(11), 1994, pp. 7320-7328

Abstract

A novel human mRNA whose expression is induced over 200-fold in B lymphocytes by latent Epstein-Barr virus (EBV) infection was reverse transcribed, cloned, and sequenced. The mRNA is predicted to encode a protein containing four peptides which precisely match amino acid sequences from a previously identified 55-kDa actin-bundling protein, p55. In vitro translation of the cDNA results in a 55-kDa protein which binds to actin filaments in the presence of purified p55 from HeLa cells. The p55 mRNA is undetectable in non-EBV-infected B- and T-cell lines or in a myelomonocytic cell line (U937). Newly infected primary human B lymphocytes, EBV-transformed B-cell lines, latently infected Burkitt tumor cells expressing EBNA2 and LMP1, a chronic myelogenous leukemia cell line (K562), and an osteosarcoma cell line (TK143) contain high levels of p55 mRNA or protein. In EBV-transformed B cells, p55 localizes to perinuclear cytoplasm and to cell surface processes that resemble filopodia. The p55 mRNA is detected at high levels in spleen and brain tissues, at moderate levels in lung and placenta tissues, and at low levels in skeletal muscle, liver, and tonsil tissues and is undetectable in heart, kidney, pancreas, and bone marrow tissues. Immunohistochemical staining of human brain tissue demonstrates p55 localization to the perinuclear cytoplasm and dendritic processes of many, but not all,types of cortical or cerebellar neurons, to glial cells, and to capillary endothelial cells. In cultured primary rat neurons, p55 is distributed throughout the perinuclear cytoplasm and in subcortical filamentous structures of dendrites and growth cones. p55 is highly evolutionarily conserved since it shows 40% amino acid sequence identity to the Drosophila singed gene product and 37% identity to fascin, an echinoderm actin bundling protein. The evolutionary conservation of p55 and its lack of extensive homology to other actin-binding proteins suggest that p55 has specific microfilament-associated functions in cells in which it is differentially expressed, including neural cells and EBV-transformed B lymphocytes.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/07/20 alle ore 22:16:42