title: Expression of the avian gene cNOC2 encoding nucleolar complex associated protein 2 during embryonic development.
abstract: Genetic information that directs a cell during different phases of embryogenesis is locked up in the genome. Therein is contained the road map for growth, proliferation, differentiation and morphogenesis. The cellular transportation machinery plays a major role to ensure that all the components for transcription and translation are available at the right place at the right time. Nucleolar complex associated protein2 (NOC2) has a highly conserved UPF0120 domain, and is an element involved in ribosome transportation from the nucleoplasm to the cytoplasm. However, its gene expression pattern is still unknown. We chose the developing chick embryo to investigate the possible involvement of avian NOC2 (cNOC2) in developmental processes, particularly neurogenesis and myogenesis. For this purpose, we constructed a fragment of chicken cNOC2, which contains the UPF0120 domain coding sequence, into pDrive vector, and performed in situ hybridization on chicken embryos of different stages with this gene probe. A dynamic expression pattern of cNOC2 transcripts can be seen beginning as early as from stage HH7 until stage HH32. Using in situ hybridization we could detect that cNOC2 transcripts were expressed ubiquitously, but prominent expression could be found in the neural tissue, the somites and in the developing limbs. Comparison of cNOC2 gene expression with the proliferation marker gene cPCNA, muscle specific marker genes cMyf5 and cMyoD in single or double in situ hybridisation show that cNOC2 is expressed in the myotome, similar to cMyf5 and cMyoD, but not like cPCNA, which is hardly detectable in the myotome. Our results suggest that cNOC2 is involved in the development of neural tissue, somites and limbs.
authors.affiliation: School of Life Science, Lanzhou University, 730000 Lanzhou, China.
authors.forename: Xiaobing
authors.initials: X
authors.lastname: Zhang
authors.forename: Fangping
authors.initials: F
authors.lastname: Dai
authors.forename: Claudia
authors.initials: C
authors.lastname: Weise
authors.forename: Faisal
authors.initials: F
authors.lastname: Yusuf
authors.forename: Alexander
authors.initials: A
authors.lastname: Bonafede
authors.forename: Gabriela
authors.initials: G
authors.lastname: Morosan-Puopolo
authors.forename: Rizwan
authors.initials: R
authors.lastname: Rehimi
authors.forename: Jianlin
authors.initials: J
authors.lastname: Wang
authors.forename: Beate
authors.initials: B
authors.lastname: Brand-Saberi
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D002352:Carrier Proteins / Q000235:genetics / Q000378:metabolism*; D002642:Chick Embryo; D017124:Conserved Sequence; D004625:Embryo, Nonmammalian; D005121:Extremities / Q000196:embryology; D018507:Gene Expression Regulation, Developmental; D008969:Molecular Sequence Data; D017570:MyoD Protein / Q000378:metabolism; D051787:Myogenic Regulatory Factor 5 / Q000378:metabolism; D009474:Neurons / Q000378:metabolism; D009687:Nuclear Proteins / Q000235:genetics / Q000378:metabolism*; D018809:Proliferating Cell Nuclear Antigen / Q000378:metabolism; D017434:Protein Structure, Tertiary / Q000235:genetics; D016601:RNA-Binding Proteins; D029701:Saccharomyces cerevisiae Proteins / Q000235:genetics / Q000378:metabolism*; D017386:Sequence Homology, Amino Acid; D019170:Somites / Q000378:metabolism
chemical_list: D002352:Carrier Proteins; D017570:MyoD Protein; D051787:Myogenic Regulatory Factor 5; C429647:NOC2 protein, S cerevisiae; D009687:Nuclear Proteins; D018809:Proliferating Cell Nuclear Antigen; D016601:RNA-Binding Proteins; D029701:Saccharomyces cerevisiae Proteins