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The adenovirus protein Gam1 interferes with sumoylation of histone deacetylase 1.


ABSTRACT: The adenovirus early gene product Gam1 is crucial for virus replication and induces certain cellular genes by inactivating histone deacetylase 1 (HDAC1). We demonstrate that Gam1 (i) destroys promyelocitic leukemia nuclear bodies, (ii) delocalizes SUMO-1 into the cytoplasm and (iii) influences the SUMO-1 pathway. In addition, we show that Gam1 counteracts HDAC1 sumoylation both in vivo and in vitro. Sumoylation of HDAC1 does not seem to be absolutely required for HDAC1 biological activity but is part of a complex regulatory circuit that also includes phosphorylation of the deacetylase. Our data demonstrate that Gam1 is a viral protein that can affect simultaneously two signaling pathways: sumoylation and acetylation.

SUBMITTER: Colombo R 

PROVIDER: S-EPMC1307602 | biostudies-literature | 2002 Nov

REPOSITORIES: biostudies-literature

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The adenovirus protein Gam1 interferes with sumoylation of histone deacetylase 1.

Colombo Riccardo R   Boggio Roberto R   Seiser Christian C   Draetta Giulio F GF   Chiocca Susanna S  

EMBO reports 20021022 11


The adenovirus early gene product Gam1 is crucial for virus replication and induces certain cellular genes by inactivating histone deacetylase 1 (HDAC1). We demonstrate that Gam1 (i) destroys promyelocitic leukemia nuclear bodies, (ii) delocalizes SUMO-1 into the cytoplasm and (iii) influences the SUMO-1 pathway. In addition, we show that Gam1 counteracts HDAC1 sumoylation both in vivo and in vitro. Sumoylation of HDAC1 does not seem to be absolutely required for HDAC1 biological activity but is  ...[more]

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