Ty1 integrase is composed of an active N-terminal domain and a large disordered C-terminal module dispensable for its activity $in\ vitro$ - Aix-Marseille Université
Article Dans Une Revue Journal of Biological Chemistry Année : 2021

Ty1 integrase is composed of an active N-terminal domain and a large disordered C-terminal module dispensable for its activity $in\ vitro$

Résumé

Long-terminal repeat (LTR) retrotransposons are genetic elements that, like retroviruses, replicate by reverse transcription of an RNA intermediate into a complementary DNA (cDNA) that is next integrated into the host genome by their own integrase. The Ty1 LTR retrotransposon has proven to be a reliable working model to investigate retroelement integration site preference. However, the low yield of recombinant Ty1 integrase production reported so far has been a major obstacle for structural studies. Here we analyze the biophysical and biochemical properties of a stable and functional recombinant Ty1 integrase highly expressed in $E.coli$. The recombinant protein is monomeric and has an elongated shape harboring the three-domain structure common to all retroviral integrases at the N-terminal half, an extra folded region, and a large intrinsically disordered region at the C-terminal half. Recombinant Ty1 integrase efficiently catalyzes concerted integration $in\ vitro$, and the N-terminal domain displays similar activity. These studies that will facilitate structural analyses may allow elucidating the molecular mechanisms governing Ty1 specific integration into safe places in the genome.
Fichier principal
Vignette du fichier
pho1.pdf (2.39 Mo) Télécharger le fichier
Origine Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-03402697 , version 1 (26-10-2021)

Licence

Identifiants

Citer

Phong Quoc Nguyen, Christine Conesa, Elise Rabut, Gabriel Bragagnolo, Célia Gouzerh, et al.. Ty1 integrase is composed of an active N-terminal domain and a large disordered C-terminal module dispensable for its activity $in\ vitro$. Journal of Biological Chemistry, 2021, 297 (4), pp.101093. ⟨10.1016/j.jbc.2021.101093⟩. ⟨hal-03402697⟩
124 Consultations
58 Téléchargements

Altmetric

Partager

More