Mapping of transcribed regions of Euglena gracilis chloroplast DNA
- 1 October 1978
- journal article
- research article
- Published by American Chemical Society (ACS) in Biochemistry
- Vol. 17 (20), 4239-4244
- https://doi.org/10.1021/bi00613a020
Abstract
RNA transcription from defined regions of the E. gracilis chloroplast genome was characterized by hybridization of total cell RNA to 3H-labeled chloroplast DNA restriction endonuclease fragments. Chloroplast DNA was digested into 5 fragments of 53, 35, 25, 10 and 6.9 kilobase pairs (kbp) with Pst1. The 53 kbp DNA was also subfractionated by BamHI digestion. The extent of transcription of the Pst1 fragments was found to be 30, 17, 15, 2.2 and 2.3 kb of RNA, respectively. The total amount of RNA transcription of 67 kb represents 26% of the double-strand information content of the genome. Transcribed regions are dispersed throughout the DNA. The RNA transcripts are present in 2 major abundance classes in the cell. High abundance transcripts of approximately 106 copies/cell were mapped in the rRNA gene region of the 53 kbp fragment and in the 35 kbp fragment. Low abundance transcripts of approximately 1000-4000 copies/cell were mapped in all 5 Pst fragments.This publication has 7 references indexed in Scilit:
- Chloroplast ribosomal RNA genes in Euglena gracilis exist as three clustered tandem repeatsGene, 1978
- Physical mapping of the Euglena gracilis chloroplast DNA and ribosomal RNA gene regionBiochemistry, 1978
- Restriction endonuclease map of Euglena gracilis chloroplast DNABiochemistry, 1977
- Cellular content of chloroplast DNA and chloroplast ribosomal RNA genes in Euglena gracilis during chloroplast developmentBiochemistry, 1977
- Expression of the chloroplast ribosomal RNA genes of Euglena gracilis during chloroplast developmentBiochemistry, 1977
- Influence of growth conditions upon the number of chloroplast DNA molecules in Euglena gracilisProceedings of the National Academy of Sciences, 1976
- Transcriptional origin of Euglena chloroplast tRNAsProceedings of the National Academy of Sciences, 1976