GENOMIC ORGANIZATION AND CHROMOSOMAL LOCALIZATION OF THE DUSP2 GENE, ENCODING A MAP KINASE PHOSPHATASE, TO HUMAN 2P11.2-Q11

The mitogen-induced gene, DUSP2, encodes a nuclear protein, PAC1, that acts as a dual-specific protein phosphatase with stringent substrate specificity for MAP kinase, MAP kinase phosphorylation and consequent enzymatic activation is a central and often obligatory component in si gnal transduction initiated by growth factor stimulation or resulting from various types of oncogenic transformation. DUSP2 downregulates in tracellular signal transduction through the dephosphorylation/inactiva tion of MAP kinases, To facilitate assessment of the possible role of DUSP2 in growth processes, the genomic structure and chromosomal locat ion of the gene have been determined. DUSP2 has been localized to the pericentromeric region of human chromosome 2 (2p11.2-q11) by analysis of somatic cell hybrids, in situ chromosome hybridization, and genetic linkage analysis using a single-strand conformational polymorphism (S SCP) that has been identified in the 3' UTR of the gene. No consistent translocations or deletions at this chromosomal site have been report ed in hematopoietic neoplasias or other tumors. (C) 1995 Academic Pres s, Inc.