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ICln is essential for cellular and early embryonic viability.
W T Pu1, K Wickman, D E Clapham
1Cardiovascular Division, Howard Hughes Medical Institute, Children's Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA.
The Journal of Biological Chemistry
|April 25, 2000
Summary
The protein pICln is essential for embryonic development and cell viability. Gene disruption in mice leads to early embryonic lethality, highlighting pICln's critical role in cellular functions.
Area of Science:
- Molecular and Cellular Biology
- Developmental Biology
Background:
- The protein pICln (26-kDa) is ubiquitously expressed and highly conserved across species.
- The physiological functions of pICln have not been fully elucidated.
Purpose of the Study:
- To investigate the essential functions of pICln by disrupting the ICln gene in embryonic stem cells.
- To determine the role of pICln in embryonic development and cellular viability.
Main Methods:
- Gene disruption of ICln in murine embryonic stem cells.
- Analysis of embryonic development and stem cell viability in knockout models.
Main Results:
- Murine embryos lacking ICln exhibit lethality between embryonic stages E3.5 and E7.5.
- ICln is indispensable for the viability of embryonic stem cells.
- pICln interacts with a protein kinase homolog involved in cell morphology and cell cycle regulation.
- pICln forms complexes with spliceosomal proteins, suggesting a role in spliceosomal biogenesis.
Conclusions:
- pICln is a critical protein essential for early embryonic development and embryonic stem cell survival.
- pICln plays significant roles in regulating the cell cycle and RNA processing pathways.