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Protein that induces cell differentiation causes nicks in double-stranded DNA
FEBS Letters
|May 5, 1986
Summary
Macrophage and granulocyte inducing proteins regulate myeloid cell development. Differentiation-inducing proteins, unlike growth-inducers, bind DNA and cause nicks, potentially initiating gene expression changes for cell differentiation.
Area of Science:
- Cellular biology
- Molecular biology
- Hematopoiesis
Background:
- Myeloid hematopoietic cell growth and differentiation are governed by specific inducing proteins.
- Differentiation-inducing proteins bind double-stranded DNA, unlike growth-inducing proteins.
Purpose of the Study:
- To investigate the interaction between myeloid cell differentiation-inducing proteins and DNA.
- To determine if these proteins affect DNA structure.
Main Methods:
- Purification of myeloid cell differentiation-inducing protein.
- Assay to detect DNA strand breaks.
Main Results:
- Purified myeloid cell differentiation-inducing protein was found to induce single-strand breaks (nicks) in double-stranded DNA.
- This DNA nicking activity was observed with the purified protein.
Conclusions:
- Myeloid cell differentiation-inducing proteins may initiate differentiation by causing DNA nicks.
- This DNA modification could be a key step in regulating gene expression for myeloid cell differentiation.