Open AccessSpecific Regions of β-Globin RNA Are Resistant to Nuclease Digestion in RNA-Protein Complexes in Chicken Reticulocyte Nuclei
Author(s) -
Jeffrey R. Patton,
Deborah Ross,
ChiBom Chae
Publication year - 1985
Publication title -
molecular and cellular biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.14
H-Index - 327
eISSN - 1067-8824
pISSN - 0270-7306
DOI - 10.1128/mcb.5.6.1220-1228.1985
Subject(s) - rna , biology , micrococcal nuclease , nuclease , microbiology and biotechnology , nuclease protection assay , globin , reticulocyte , non coding rna , biochemistry , dna , gene , chromatin , nucleosome
The interaction between beta-globin RNA and proteins in chicken reticulocyte nuclei was studied by determining the sequence of nuclease-resistant beta-globin RNA. Two types of nuclease-resistant RNAs were isolated for this study: endogenous nuclease-resistant RNA from 50S heterogeneous nuclear RNA-protein complexes and micrococcal nuclease-resistant nuclear RNA from whole nuclei. The nuclease-resistant regions were identified with the use of a RNA mapping method we recently developed (J.R. Patton and C.-B. Chae, J. Biol. Chem. 258:3991-3995, 1983). We found that beta-globin RNA is assembled into heterogeneous nuclear RNA-protein complexes in a specific manner. There are several regions of nuclease resistance in the first and third exons interrupted at regular intervals by sensitive regions. The second exon has only one nuclease-resistant region. The resistant regions range in size from 20 to 50 nucleotides. This organization may reflect a specific mode of assembly for heterogeneous nuclear RNA-protein complexes.