Holocarboxylase synthetase interacts physically with nuclear receptor co-repressor, histone deacetylase 1 and a novel splicing variant of histone deacetylase.

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Holocarboxylase synthetase interacts physically with nuclear receptor co-repressor, histone deacetylase 1 and a novel splicing variant of histone deacetylase 1 to repress repeats by Dandan Liu, and Janos Zempleni Biochem. J. Volume 461(3): August 1, 2014 ©2014 by Portland Press Ltd

HLCS-containing multi-protein gene repression complex The binding of HLCS to chromatin depends on physical interactions of HLCS with the maintenance DNA methyltransferase DNMT1 and MeCP2. Dandan Liu, and Janos Zempleni Biochem. J. 2014;461: ©2014 by Portland Press Ltd

Schematic diagrams of domains in N-CoR and luciferase constructs used in the split luciferase complementation assays (A) The N-terminus of N-CoR contains transcriptional repression domains (RDs) responsible for the recruitment of additional components of th... Dandan Liu, and Janos Zempleni Biochem. J. 2014;461: ©2014 by Portland Press Ltd

HLCS interacts physically with N-CoR (A) In co-immunoprecipitation assays, Myc–HLCS and HA–N-CoR-CT were overexpressed in HEK-293 cells and cell lysates were precipitated with anti- Myc or anti-HA antibodies. Dandan Liu, and Janos Zempleni Biochem. J. 2014;461: ©2014 by Portland Press Ltd

Split luciferase complementation assays for detection of HLCS and N-CoR interaction in HEK- 293 cells Fusion constructs of TP53 and MDM2 were used as positive controls and TP53 and CDK3 were used as negative controls. Dandan Liu, and Janos Zempleni Biochem. J. 2014;461: ©2014 by Portland Press Ltd

HLCS interacts physically with HDAC1 (A) In co-immunoprecipitation assays, Myc–HLCS and HA–HDAC1 were overexpressed in HEK-293 cells and cell lysates were precipitated with anti- Myc or anti-HA antibodies. Dandan Liu, and Janos Zempleni Biochem. J. 2014;461: ©2014 by Portland Press Ltd

Split luciferase complementation assays for detection of HLCS and HDAC1 interaction in HEK- 293 cells Fusion constructs of TP53 and MDM2 were used as positive controls and TP53 and CDK3 were used as negative controls. Dandan Liu, and Janos Zempleni Biochem. J. 2014;461: ©2014 by Portland Press Ltd

The roles of HLCS domains in mediating interactions with N-CoR and HDAC1 Myc-tagged HLCS and HA-tagged N-CoR C-terminus (A) or HDAC1 (B) were overexpressed in HEK-293 cells. Dandan Liu, and Janos Zempleni Biochem. J. 2014;461: ©2014 by Portland Press Ltd

N-CoR and HDAC1 are targets for biotinylation of HLCS (A) Recombinant N-terminus, central domain and C-terminus in N-CoR were incubated with recombinant (r) HLCS, biotin and cofactors for biotinylation for up to 2 h. Dandan Liu, and Janos Zempleni Biochem. J. 2014;461: ©2014 by Portland Press Ltd

Transcriptional repression of repeats by HLCS overexpression (A) Transfection with the plasmid p3XFLAG-Myc-CMV-26-HLCS produced a stable overexpression of HLCS in HEK-293 cells, judged by qPCR (n=3; *P<0.05 compared with the untransfected controls) and West... Dandan Liu, and Janos Zempleni Biochem. J. 2014;461: ©2014 by Portland Press Ltd