Anti-PSPC1 Antibody Picoband® Fluoro594 Conjugated

This gene encodes a nucleolar protein that localizes to punctate subnuclear structures that occur close to splicing speckles, known as paraspeckles. These paraspeckles are composed of RNA-protein structures that include a non-coding RNA, NEAT1/Men epsilon/beta, and the Drosophila Behavior Human Splicing family of proteins, which include the product of this gene and the P54NRB/NONO and PSF/SFPQ proteins. Paraspeckles may function in the control of gene expression via an RNA nuclear retention mechanism. The protein encoded by this gene is found in paraspeckles in transcriptionally active cells, but it localizes to unique cap structures at the nucleolar periphery when RNA polymerase II transcription is inhibited, or during telophase. Alternative splicing of this gene results in multiple transcript variants. A related pseudogene, which is also located on chromosome 13, has been identified.

Actin Assembly, Actin, etc., Cytoskeleton, Cytoskeleton/ECM, G Protein Signaling, Microfilaments, Ras Family, Signal Transduction, Signaling Pathway, Small G Proteins

Lacks intrinsic GTPase activity. Has a low affinity for GDP, and constitutively binds GTP. Controls rearrangements of the actin cytoskeleton. Induces the Rac-dependent neuritic process formation in part by disruption of the cortical actin filaments. Causes the formation of many neuritic processes from the cell body with disruption of the cortical actin filaments. .

1. Andersen, J. S., Lyon, C. E., Fox, A. H., Leung, A. K. L., Lam, Y. W., Steen, H., Mann, M., Lamond, A. I. ed proteomic analysis of the human nucleolus. Curr. Biol. 12: 1-11, 2002. 2. Fox, A. H., Bond, C. S., Lamond, A. I. P54nrb forms a heterodimer with PSP1 that localizes to paraspeckles in an RNA-dependent manner. Molec. Biol. Cell 16: 5304-5315, 2005. 3. Fox, A. H., Lam, Y. W., Leung, A. K. L., Lyon, C. E., Andersen, J., Mann, M., Lamond, A. I. Paraspeckles: a novel nuclear domain. Curr. Biol. 12: 13-25, 2002.