title: REGULATOR: a database of metazoan transcription factors and maternal factors for developmental studies.
abstract: BACKGROUND
  Genes encoding transcription factors that constitute gene-regulatory networks and maternal factors accumulating in egg cytoplasm are two classes of essential genes that play crucial roles in developmental processes. Transcription factors control the expression of their downstream target genes by interacting with cis-regulatory elements. Maternal factors initiate embryonic developmental programs by regulating the expression of zygotic genes and various other events during early embryogenesis.
  
  
  RESULTS
  This article documents the transcription factors of 77 metazoan species as well as human and mouse maternal factors. We improved the previous method using a statistical approach adding Gene Ontology information to Pfam based identification of transcription factors. This method detects previously un-discovered transcription factors. The novel features of this database are: (1) It includes both transcription factors and maternal factors, although the number of species, in which maternal factors are listed, is limited at the moment. (2) Ontological representation at the cell, tissue, organ, and system levels has been specially designed to facilitate development studies. This is the unique feature in our database and is not available in other transcription factor databases.
  
  
  CONCLUSIONS
  A user-friendly web interface, REGULATOR ( http://www.bioinformatics.org/regulator/ ), which can help researchers to efficiently identify, validate, and visualize the data analyzed in this study, are provided. Using this web interface, users can browse, search, and download detailed information on species of interest, genes, transcription factor families, or developmental ontology terms.
authors.affiliation: Department of Biological Sciences, Graduate School of Science, Osaka University, Toyonaka, Osaka, 560-0043, Japan. wangk@bio.sci.osaka-u.ac.jp.
authors.forename: Kai
authors.initials: K
authors.lastname: Wang
authors.affiliation: Department of Biological Sciences, Graduate School of Science, Osaka University, Toyonaka, Osaka, 560-0043, Japan. hnishida@bio.sci.osaka-u.ac.jp.
authors.forename: Hiroki
authors.initials: H
authors.lastname: Nishida
mesh_terms: D000818:Animals; D016208:Databases, Factual; D018507:Gene Expression Regulation, Developmental; D053263:Gene Regulatory Networks; D006801:Humans; D051379:Mice; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism*; D014584:User-Computer Interface
chemical_list: D014157:Transcription Factors