title: Cell type-specific mRNA purification by translating ribosome affinity purification (TRAP).
abstract: Cellular diversity and architectural complexity create barriers to understanding the function of the mammalian CNS at a molecular level. To address this problem, we have recently developed a methodology that provides the ability to profile the entire translated mRNA complement of any genetically defined cell population. This methodology, which we termed translating ribosome affinity purification, or TRAP, combines cell type-specific transgene expression with affinity purification of translating ribosomes. TRAP can be used to study the cell type-specific mRNA profiles of any genetically defined cell type, and it has been used in organisms ranging from Drosophila melanogaster to mice and human cultured cells. Unlike other methodologies that rely on microdissection, cell panning or cell sorting, the TRAP methodology bypasses the need for tissue fixation or single-cell suspensions (and the potential artifacts that these treatments introduce) and reports on mRNAs in the entire cell body. This protocol provides a step-by-step guide to implement the TRAP methodology, which takes 2 d to complete once all materials are in hand.
authors.affiliation: 1] Laboratory of Molecular and Cellular Neuroscience, The Rockefeller University, New York, New York, USA. [2].
authors.forename: Myriam
authors.initials: M
authors.lastname: Heiman
authors.affiliation: 1] Laboratory of Molecular and Cellular Neuroscience, The Rockefeller University, New York, New York, USA. [2].
authors.forename: Ruth
authors.initials: R
authors.lastname: Kulicke
authors.affiliation: 1] Laboratory of Molecular and Cellular Neuroscience, The Rockefeller University, New York, New York, USA. [2].
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Fenster
authors.affiliation: Laboratory of Molecular and Cellular Neuroscience, The Rockefeller University, New York, New York, USA.
authors.forename: Paul
authors.initials: P
authors.lastname: Greengard
authors.affiliation: Laboratory of Molecular Biology, Howard Hughes Medical Institute, The Rockefeller University, New York, New York, USA.
authors.forename: Nathaniel
authors.initials: N
authors.lastname: Heintz
mesh_terms: D000818:Animals; D002478:Cells, Cultured; D020869:Gene Expression Profiling / Q000379:methods*; D006801:Humans; D051379:Mice; D011132:Polyribosomes / Q000235:genetics / Q000378:metabolism; D012333:RNA, Messenger / Q000302:isolation & purification*; D012270:Ribosomes / Q000235:genetics*; D059010:Single-Cell Analysis / Q000379:methods*
chemical_list: D012333:RNA, Messenger