A tandem array of 5S ribosomal RNA genes in Pythium irregulare |
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| Institution: | 1. Triticeae Research Institute, Sichuan Agricultural University, Wenjiang 611130, Sichuan, China;2. Key Laboratory of Crop Genetic Resources and Improvement, Ministry of Education, Sichuan Agricultural University, Yaan 625014, Sichuan, China;3. Biology Department, Saint Mary’s University, Halifax NS B3H 3C3, Canada;4. College of Resources and Environment, Sichuan Agricultural University, Wenjiang 611130, Sichuan, China;5. College of Life Sciences, Sichuan Agricultural University, Yaan 625014, Sichuan, China;1. Department of Surgery and Translational Medicine, Section of Clinical Preventive and Oncology Dermatology, Università di Firenze, 50125 Florence, Italy;2. Department of Biomedical Sciences for Health, Lab of Structural and Ultrastructural Morphology, Università degli Studi di Milano, 20133 Milan, Italy;3. I.R.C.C.S. Istituto Ortopedico Galeazzi, 20161 Milan, Italy;1. Department of Radiology, Gyeongsang National University Hospital and College of Medicine, Gyeongsang National University, Jinju, 52727, Republic of Korea;2. Cardiovascular and Metabolic Disease Center, Paik Hospital, Inje University, Busan, 47392, Republic of Korea;3. Department of Bio and Brain Engineering, KAIST, Daejeon, 305-701, Republic of Korea;4. College of Pharmacy and Research Institute of Pharmaceutical Sciences, Gyeongsang National University, Jinju, 52828, Republic of Korea;5. School of Biosystem and Biomedical Science, College of Health Science, Korea University, Seoul, 02841, Republic of Korea;1. Francis Marion University, Department of Biology, P.O. Box 100547, Florence, SC 29502, USA;2. U.S. Geological Survey, Great Lakes Science Center, 1451 Green Road, Ann Arbor, MI 48105, USA |
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| Abstract: | The 5S ribosomal RNA genes of the oomycete Pythium irregulare exist in tandem arrays unlinked to the rDNA repeat unit. A clone with a 9.2-kb insert containing an array of 5S genes was identified in a lambda genomic library and was characterized by restriction mapping and partial sequencing. The array consisted of 9 apparently identical 5S genes and their spacers in tandem, followed by a diverged 5S-like sequence that is likely to be a pseudogene. This gene arrangement, although almost universal in plants and animals, is rare in fungi and protists. |
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