Primary focus of proposed studies is detailed analysis of (autogenous) repression of splicing of the primary transcript of a presumptive regulatory gene, suppressor-of-white-apricot [su(wa)], by the protein product of that gene. Various studies are proposed including refinement of observations implicating the 3' splice site region of the regulated intron as the target for autorepression of splicing; in vitro splicing and binding studies to establish and characterize direct interaction between the su(wa) protein and primary transcript; and attempt (with Dr. Ann L. Beyer) to visualize splicing and autorepression of splicing of su(wa) transcripts in the electron microscope; and analysis of an unusual domain of the su(wa) protein which strongly resembles a domain in a second splicing regulator (the tra protein) with the objective of determining whether these domains are diagnostic of splicing regulators. Further, we propose to extend our analysis of the su(wa) promoter. Among other things these studies are expected, first, to provide the first documented case of a conventional enhancer core element in an arthropod and, second, to allow the construction of a maternal deposition vector system allowing specific, high level delivery of mRNAs (and proteins) from cloned genes to young embryos. This vector would have various important general applications including to analysis of embryonic pattern formation. If appropriate studies above are successful, they will result in a general strategy for molecular analysis of splicing regulation. Specifically, the maternal deposition vector should allow high level deposition of any cloned splicing regulator in young embryos. Young embryos, in turn, are appropriate material for electron microscopic visualization of splicing and splicing regulation as well as for preparation of nuclear splicing extracts for in vitro splicing studies.

Agency
National Institute of Health (NIH)
Institute
National Institute of General Medical Sciences (NIGMS)
Type
Research Project (R01)
Project #
5R01GM032003-11
Application #
2176403
Study Section
Molecular Biology Study Section (MBY)
Project Start
1983-04-01
Project End
1995-11-30
Budget Start
1993-12-01
Budget End
1995-11-30
Support Year
11
Fiscal Year
1994
Total Cost
Indirect Cost
Name
State University New York Stony Brook
Department
Biochemistry
Type
Schools of Arts and Sciences
DUNS #
804878247
City
Stony Brook
State
NY
Country
United States
Zip Code
11794
Zachar, Z; Chou, T B; Kramer, J et al. (1994) Analysis of autoregulation at the level of pre-mRNA splicing of the suppressor-of-white-apricot gene in Drosophila. Genetics 137:139-50
Zachar, Z; Kramer, J; Bingham, P M (1994) Looking at mRNA splicing and transport in situ. Methods Cell Biol 44:599-611
Spikes, D A; Kramer, J; Bingham, P M et al. (1994) SWAP pre-mRNA splicing regulators are a novel, ancient protein family sharing a highly conserved sequence motif with the prp21 family of constitutive splicing proteins. Nucleic Acids Res 22:4510-9
Zachar, Z; Kramer, J; Mims, I P et al. (1993) Evidence for channeled diffusion of pre-mRNAs during nuclear RNA transport in metazoans. J Cell Biol 121:729-42
Spikes, D; Bingham, P M (1992) Analysis of spliceosome assembly and the structure of a regulated intron in Drosophila in vitro splicing extracts. Nucleic Acids Res 20:5719-27
Zachar, Z; Bingham, P M (1989) Suppressible insertion-induced mutations in Drosophila. Prog Nucleic Acid Res Mol Biol 36:87-98
Bingham, P M; Chou, T B; Mims, I et al. (1988) On/off regulation of gene expression at the level of splicing. Trends Genet 4:134-8
Zachar, Z; Chou, T B; Bingham, P M (1987) Evidence that a regulatory gene autoregulates splicing of its transcript. EMBO J 6:4105-11
Zachar, Z; Garza, D; Chou, T B et al. (1987) Molecular cloning and genetic analysis of the suppressor-of-white-apricot locus from Drosophila melanogaster. Mol Cell Biol 7:2498-505
Bingham, P M; Chapman, C H (1986) Evidence that white-blood is a novel type of temperature-sensitive mutation resulting from temperature-dependent effects of a transposon insertion on formation of white transcripts. EMBO J 5:3343-51

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