Conservation and Expression of IQ-Domain-Containing Calpacitin Gene Products (Neuromodulin/GAP-43, Neurogranin/RC3) in the Adult and Developing Oscine Song Control System

被引:11
作者
Clayton, David F. [1 ,2 ]
George, Julia M. [1 ,2 ]
Mello, Claudio V. [2 ]
Siepka, Sandra M. [1 ]
机构
[1] Univ Illinois, Dept Cell & Dev Biol, Urbana, IL 61801 USA
[2] Rockefeller Univ, Lab Anim Behav, New York, NY 10021 USA
关键词
GAP-43; neuromodulin; critical period; canary; zebra finch; song control system; RA; Area X; HAT-14; songbird; neurogranin; RC3; NRGN; neural plasticity; IQ domain; calpacitin; PROTEIN-KINASE-C; GROWTH-ASSOCIATED PROTEIN; CALMODULIN-BINDING PROTEIN; LONG-TERM POTENTIATION; ZEBRA FINCH BRAIN; CANARIES SERINUS-CANARIA; AMINO-ACID-SEQUENCE; CONTROL NUCLEI; MESSENGER-RNA; PHOSPHORYLATION SITE;
D O I
10.1002/dneu.20686
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
Songbirds are appreciated for the insights they provide into regulated neural plasticity. Here, we describe the comparative analysis and brain expression of two gene sequences encoding probable regulators of synaptic plasticity in songbirds: neuromodulin (GAP-43) and neurogranin (RC3). Both are members of the calpacitin family and share a distinctive conserved core domain that mediates interactions between calcium, calmodulin, and protein kinase C signaling pathways. Comparative sequence analysis is consistent with known phylogenetic relationships, with songbirds most closely related to chicken and progressively more distant from mammals and fish. The C-terminus of neurogranin is different in birds and mammals, and antibodies to the protein reveal high expression in adult zebra finches in cerebellar Purkinje cells, which has not been observed in other species. RNAs for both proteins are generally abundant in the telencephalon yet markedly reduced in certain nuclei of the song control system in adult canaries and zebra finches: neuromodulin RNA is very low in RA and HVC (relative to the surrounding pallial areas), whereas neurogranin RNA is conspicuously low in Area X (relative to surrounding striatum). In both cases, this selective downregulation develops in the zebra finch during the juvenile song learning period, 25-45 days after hatching. These results suggest molecular parallels to the robust stability of the adult avian song control circuit. (C) 2008 Wiley Periodicals, Inc. Develop Neurobiol 69: 124-140, 2009
引用
收藏
页码:124 / 140
页数:17
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