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Related Experiment Video

Updated: Jun 15, 2026

Covalent Binding of BMP-2 on Surfaces Using a Self-assembled Monolayer Approach

Covalent Binding of BMP-2 on Surfaces Using a Self-assembled Monolayer Approach

Published on: August 26, 2013

Nuclear variants of bone morphogenetic proteins.

Jenny E Felin¹, Jaime L Mayo, Trina J Loos

¹Department of Microbiology and Molecular Biology, Brigham Young University, Provo, Utah, USA.

BMC Cell Biology

|March 17, 2010

Summary

Bone morphogenetic proteins (BMPs) are newly found in cell nuclei. These nuclear BMP variants, like nBmp2, have distinct cell cycle localization, suggesting novel functions in cellular processes.

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Area of Science:

Cell Biology
Molecular Biology
Developmental Biology

Background:

Bone morphogenetic proteins (BMPs) are crucial for development, including mesoderm, heart, and skeletal formation.
Previously considered solely secreted growth factors, this study investigates nuclear localization of BMPs.

Purpose of the Study:

To investigate the presence and function of BMPs within the cell nucleus.
To identify the mechanism of nuclear localization for specific BMPs.

Main Methods:

Immunocytochemistry and immunoblotting of nuclear extracts to detect BMPs.
Mutational analyses to study protein variants and localization signals.
Cell cycle analysis of nuclear BMP distribution.

Main Results:

Bmp2, Bmp4, and Gdf5 were detected in the nuclei of cultured cells.
Nuclear variants (nBmp2, nBmp4, nGdf5) lack signal peptides and are translated in the cytoplasm.
Nuclear localization signals (NLS) were identified, and nBmp2 localization varied with cell cycle phase.

Conclusions:

Novel nuclear variants of BMPs (nBmp2, nBmp4, nGdf5) exist and possess functional nuclear localization signals.
The cell cycle-dependent localization of nBmp2 suggests a role in cell cycle regulation.
The conserved nuclear localization mechanism points to important, yet undiscovered, nuclear functions for BMPs.