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PLoS By Category | Recent PLoS Articles
Biochemistry - Hematology - Molecular Biology

Mediator Subunit 12 Is Required for Neutrophil Development in Zebrafish
Published: Thursday, August 25, 2011
Author: Maria-Cristina Keightley et al.

by Maria-Cristina Keightley, Judith E. Layton, John W. Hayman, Joan K. Heath, Graham J. Lieschke

Hematopoiesis requires the spatiotemporal organization of regulatory factors to successfully orchestrate diverse lineage specificity from stem and progenitor cells. Med12 is a regulatory component of the large Mediator complex that enables contact between the general RNA polymerase II transcriptional machinery and enhancer bound regulatory factors. We have identified a new zebrafish med12 allele, syr, with a single missense mutation causing a valine to aspartic acid change at position 1046. Syr shows defects in hematopoiesis, which predominantly affect the myeloid lineage. Syr has identified a hematopoietic cell-specific requirement for Med12, suggesting a new role for this transcriptional regulator.
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