期刊
GENOMICS
卷 112, 期 5, 页码 3097-3107出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ygeno.2020.05.024
关键词
Chromosome; Teleost; Amplification; Deletion
资金
- Kasetsart University Research and Development Institute (KURDI) [7.58]
- Thailand Research Fund (TRF) [PHD60I0082, PHD60I0014, RSA6180075]
- Center for Advanced Studies in Tropical Natural Resources, National Research University-Kasetsart University (CASTNAR, NRU-KU, Thailand)
- Center of Excellence on Agricultural Biotechnology, Science and Technology Postgraduate Education and Research Development Office, Office of Higher Education Commission, Ministry of Education (AG-BIO/PERDO-CHE)
- Omics Center for Agriculture, Bioresources, Food and Health, Kasetsart University (OmiKU)
Centromeric satellite DNA (cen-satDNA) sequences of the Asian swamp eel ( Monopterus albus ) were characterized. Three GC-rich cen-satDNA sequences were detected as a 233 bp MALREP-A and a 293 bp MALREP-B localized to all chromosomes, and a 293 bp MALREP-C distributed on eight chromosome pairs. Sequence lengths of MALREP-B and MALREP-C were 60 bp larger than that of MALREP-A, showing partial homology with core sequences (233 bp). Size differences between MALREP-A and MALREP-B/C suggest the possible occurrence of two satDNA families. The presence of an additional 60 bp in MALREP-B/C resulted from an ancient dimer of 233 bp monomers and subsequent mutation and homogenization between the two monomers. All MALREPs showed partial homology with transposable elements (TEs), suggesting that the MALREPs originated from the TEs. The MALREPs might have been acquired in the Asian swamp eel, thereby promoting fixation in the species.
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