Despite the (TTAGG) telomeric repeat supposed being the ancestral DNA motif of telomeres in insects, it was repeatedly lost within some insect orders. Notably, parasitoid hymenopterans and the social wasp Metapolybia decorata (Gribodo) lack the (TTAGG) sequence, but in other representatives of Hymenoptera, this motif was noticed, such as different ant species and the honeybee. These findings raise the question of whether the insect telomeric repeat is or not phylogenetically predominant in Hymenoptera. Thus, we evaluated the occurrence of both the (TTAGG) sequence and the vertebrate telomere sequence (TTAGGG) using dot-blotting hybridization in 25 aculeate species of Hymenoptera. Our results revealed the absence of (TTAGG) sequence in all tested species, elevating the number of hymenopteran families lacking this telomeric sequence to 13 out of the 15 tested families so far. The (TTAGGG) was not observed in any tested species. Based on our data and compiled information, we suggest that the (TTAGG) sequence was putatively lost in the ancestor of Apocrita with at least two subsequent independent regains (in Formicidae and Apidae).
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1007/s00114-017-1507-z | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Karyotypes and Chromosomal Mapping of Some Repetitive DNAs in Two Stingless Bee Species (Apidae: Meliponini), with the Description of a B Chromosome in Plebeia Genus.
Cytogenet Genome Res
October 2024
Departamento de Biologia Geral/Universidade Federal de Viçosa, Viçosa, Brazil.
Introduction: Cytogenetic studies on stingless bees have significantly contributed to our understanding of karyotypic evolution and the composition of euchromatin and heterochromatin regions, including repetitive sequences.
Methods: In this study, we performed classical cytogenetics, chromosomal banding, and mapping of some repetitive sequences in two stingless bee species, Frieseomelitta trichocerata and Plebeia poecilochroa.
Results: The species exhibit the typical diploid chromosome number of each genera, 2n = 30 for Frieseomelitta and 2n = 34 for Plebeia.
The First FISH-Confirmed Non-Canonical Telomeric Motif in Heteroptera: Linnaeus, 1758 and (Fabricius, 1803) (Hemiptera, Cimicidae) Have a 10 bp Motif (TTAGGGATGG).
Genes (Basel)
August 2024
Zoological Institute, Russian Academy of Sciences, 199034 St. Petersburg, Russia.
Fluorescence in situ hybridization (FISH) with two different probes, the canonical insect telomeric sequence (TTAGG) and the sequence (TTAGGGATGG), was performed on meiotic chromosomes of two members of the true bug family Cimicidae (Cimicomorpha), the common bed bug Linnaeus, 1758 and the tropical bed bug . (Fabricius, 1803), whose telomeric motifs were not known. In both species, there were no hybridization signals with the first probe, but strong signals at chromosomal ends were observed with the second probe, indicating the presence of a telomeric motif (TTAGGGATGG).
View Article and Find Full Text PDFNew insights into the chromosomes of stoneflies: I. Karyotype, C-banding and localization of ribosomal and telomeric DNA markers in (McLachlan, 1872) (Polyneoptera, Plecoptera, Perlodidae) from Siberia.
Comp Cytogenet
January 2024
Novosibirsk State University, Pirogova Str. 2, Novosibirsk 630090, Russia Novosibirsk State University Novosibirsk Russia.
This study provides data on chromosome number (2n♂♀=26), sex determination mechanism (XY♂/XX♀), C-banding pattern, distribution of clusters of telomeric TTAGG repeats and 18S ribosomal DNA in the karyotype of the stonefly (McLachlan, 1872). For the first time in the history of stoneflies cytogenetics, we provide photos of the chromosomes of the Plecoptera insects. The karyotype of males and females of consists of 12 pairs of autosomes.
View Article and Find Full Text PDFConventional cytogenetics and microsatellite chromosomal distribution in social wasp (Ihering, 1903) (Vespidae, Polistinae, Mischocyttarini).
Genome
May 2024
Laboratório de Citogenética de Insetos, Departamento de Biologia Geral, Universidade Federal de Viçosa, Campus Viçosa, Avenida Peter Henry Rolfs s/n, 36570-900, Viçosa, Minas Gerais, Brazil.
Article Synopsis
- Cytogenetic analysis was conducted to study the chromosomal structure and repetitive DNA in a specific genus of social wasps, revealing a karyotype with 64 chromosomes in females and 32 in males.
- The study found three patterns of constitutive heterochromatin distribution and identified major ribosomal DNA sites on specific chromosome pairs for both sexes.
- The research highlights differences in microsatellite locations compared to previous studies, indicating greater variation in chromosomal organization and repetitive sequence diversity among social wasps.
Insect multimeric G-quadruplexes fold into antiparallel structures of different compactness and stability in K and Na solutions.
RSC Adv
December 2023
National R&D Center for Se-rich Agricultural Products Processing, Hubei Engineering Research Center for Deep Processing of Green Se-rich Agricultural Products, School of Modern Industry for Selenium Science and Engineering, Wuhan Polytechnic University Wuhan 430023 China
Human telomere sequences (TTAGGG) fold into G-quadruplexes with different conformations in K and Na solutions, which are highlighted for their potential as antitumor drug targets. Moreover, human multimeric G-quadruplexes have been broadly studied potentially for screening ligands with higher selectivity than monomeric G-quadruplexes. Most insects have telomeres consisting of pentanucleotide (TTAGG) repeats, which fold into an antiparallel structured G-quadruplex with a two-layer G-planar in a K solution.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!