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R2 dynamics in Triops cancriformis (Bosc, 1801) (Crustacea, Branchiopoda, Notostraca): turnover rate and 28S concerted evolution.
Heredity (Edinb). 2011 Apr; 106(4):567-75.H

Abstract

The R2 retrotransposon is here characterized in bisexual populations of the European crustacean Triops cancriformis. The isolated element matches well with the general aspects of the R2 family and it is highly differentiated from that of the congeneric North American Triops longicaudatus. The analysis of 5' truncations indicates that R2 dynamics in T. cancriformis populations show a high turnover rate as observed in Drosophila simulans. For the first time in the literature, though, individuals harboring truncation variants, but lacking the complete element, are found. Present results suggest that transposition-mediated deletion mechanisms, possibly involving genomic turnover processes acting on rDNAs, can dramatically decrease the copy number or even delete R2 from the ribosomal locus. The presence of R2 does not seem to impact on the nucleotide variation of inserted 28S rDNA with respect to the uninserted genes. On the other hand, a low level of polymorphism characterizes rDNA units because new 28S variants continuously spread across the ribosomal array. Again, the interplay between transposition-mediated deletion and molecular drive may explain this pattern.

Authors+Show Affiliations

Dipartimento di Biologia Evoluzionistica Sperimentale, Università di Bologna, Bologna, Italy.No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

20628416

Citation

Mingazzini, V, et al. "R2 Dynamics in Triops Cancriformis (Bosc, 1801) (Crustacea, Branchiopoda, Notostraca): Turnover Rate and 28S Concerted Evolution." Heredity, vol. 106, no. 4, 2011, pp. 567-75.
Mingazzini V, Luchetti A, Mantovani B. R2 dynamics in Triops cancriformis (Bosc, 1801) (Crustacea, Branchiopoda, Notostraca): turnover rate and 28S concerted evolution. Heredity (Edinb). 2011;106(4):567-75.
Mingazzini, V., Luchetti, A., & Mantovani, B. (2011). R2 dynamics in Triops cancriformis (Bosc, 1801) (Crustacea, Branchiopoda, Notostraca): turnover rate and 28S concerted evolution. Heredity, 106(4), 567-75. https://doi.org/10.1038/hdy.2010.86
Mingazzini V, Luchetti A, Mantovani B. R2 Dynamics in Triops Cancriformis (Bosc, 1801) (Crustacea, Branchiopoda, Notostraca): Turnover Rate and 28S Concerted Evolution. Heredity (Edinb). 2011;106(4):567-75. PubMed PMID: 20628416.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - R2 dynamics in Triops cancriformis (Bosc, 1801) (Crustacea, Branchiopoda, Notostraca): turnover rate and 28S concerted evolution. AU - Mingazzini,V, AU - Luchetti,A, AU - Mantovani,B, Y1 - 2010/07/14/ PY - 2010/7/15/entrez PY - 2010/7/16/pubmed PY - 2011/7/13/medline SP - 567 EP - 75 JF - Heredity JO - Heredity (Edinb) VL - 106 IS - 4 N2 - The R2 retrotransposon is here characterized in bisexual populations of the European crustacean Triops cancriformis. The isolated element matches well with the general aspects of the R2 family and it is highly differentiated from that of the congeneric North American Triops longicaudatus. The analysis of 5' truncations indicates that R2 dynamics in T. cancriformis populations show a high turnover rate as observed in Drosophila simulans. For the first time in the literature, though, individuals harboring truncation variants, but lacking the complete element, are found. Present results suggest that transposition-mediated deletion mechanisms, possibly involving genomic turnover processes acting on rDNAs, can dramatically decrease the copy number or even delete R2 from the ribosomal locus. The presence of R2 does not seem to impact on the nucleotide variation of inserted 28S rDNA with respect to the uninserted genes. On the other hand, a low level of polymorphism characterizes rDNA units because new 28S variants continuously spread across the ribosomal array. Again, the interplay between transposition-mediated deletion and molecular drive may explain this pattern. SN - 1365-2540 UR - https://www.unboundmedicine.com/medline/citation/20628416/R2_dynamics_in_Triops_cancriformis__Bosc_1801___Crustacea_Branchiopoda_Notostraca_:_turnover_rate_and_28S_concerted_evolution_ L2 - https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/20628416/ DB - PRIME DP - Unbound Medicine ER -