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© A-M. Pais-Correia, M-I. Thoulouze, A. Alcover, A. Gessain
Mise en évidence de structures de type "biofilm ", formées par le rétrovirus HTLV-1 générés par des cellules infectées (cellules du haut), qui ont été transmis à un autre lymphocyte (cellule du bas). Micrographie en microscopie électronique à balayage. Image colorisée.
Publication : Retrovirology

Presence of a functional but dispensable nuclear export signal in the HTLV-2 Tax protein

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Retrovirology - 14 Nov 2005

Chevalier SA, Meertens L, Calattini S, Gessain A, Kiemer L, Mahieux R

Link to Pubmed [PMID] – 16285885

Retrovirology 2005;2:70

Human T-cell leukemia virus type 1 and type 2 are related human retroviruses. HTLV-1 is the etiological agent of the Adult T-cell Leukemia/Lymphoma and of the Tropical Spastic Paraparesis/HTLV-1 Associated Myelopathy, whereas, HTLV-2 infection has not been formally associated with any T-cell malignancy. HTLV-1 and 2 genomes encode, respectively, the Tax1 and Tax2 proteins whose role is to transactivate the viral promoter. HTLV-1 and HTLV-2 Tax sequences display 28% divergence at the amino acid level. Tax1 is a shuttling protein that possesses both a non canonical nuclear import (NLS) and a nuclear export (NES) signal. We have recently demonstrated that Tax1 and Tax2 display different subcellular localization and that residues 90-100 are critical for this process. We investigate in the present report, whether Tax2 also possesses a functional NES.

http://www.ncbi.nlm.nih.gov/pubmed/16285885