Ecm11 is located in the cell nucleus throughout mitosis

Area of Science:

• Cell Biology
• Molecular Biology
• Genetics

Background:

• Previous two-hybrid screening identified interactions between Ecm11 and Cdc6.
• The cellular localization and function of Ecm11 remain largely uncharacterized.

Purpose of the Study:

• To investigate the cellular localization of Ecm11.
• To explore the potential function of Ecm11 in nuclear processes.
• To confirm the interaction between Ecm11 and Cdc6 in vivo.

Main Methods:

• Ecm11 was expressed as a Green Fluorescent Protein (GFP) fusion protein.
• Subcellular localization was determined using fluorescence microscopy throughout mitosis.
• Functional assays involved LexA DNA-binding domain fusions to assess transcriptional activity.

Main Results:

• The Ecm11-GFP fusion protein localized to the cell nucleus during all stages of mitosis.
• Ecm11 was observed in discrete nuclear clusters, potentially indicating polymerization or association with nuclear structures.
• Two Ecm11 molecules interact in a two-hybrid assay, suggesting functional dimer formation.
• Ecm11 did not exhibit transcriptional activation of a reporter gene.

Conclusions:

• Ecm11 is a nuclear protein.
• Ecm11 may be involved in maintaining chromatin structure.
• The observed nuclear localization and clustering suggest a role in organizing nuclear components.