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Group I catalytic introns have been found in bacterial, viral, organellar, and some eukaryotic genomes, but not in archaea. All known archaeal introns are bulge-helix-bulge (BHB) introns, with the exception of a few group II introns. It has been proposed that BHB introns arose from extinct group I intron ancestors, much like eukaryotic spliceosomal introns are thought to have descended from group II introns. However, group I introns have little sequence conservation, making them difficult to detect with standard sequence similarity searches. Taking advantage of recent improvements in a computational homology search method that accounts for both conserved sequence and RNA secondary structure, we have identified 39 group I introns in a wide range of archaeal phyla, including examples of group I introns and BHB introns in the same host gene.
This article was published in the following journal.
Name: Nucleic acids research
Various strains belonging to three Acanthamoeba species, A. griffini (genotype T3), A. lenticulata (T5), and A. jacobsi (T15), have group I introns in their 18S rRNA genes. Group I introns are self-sp...
Most eukaryotic genes contain introns, which are non-coding sequences that are removed during pre-mRNA processing. Introns are usually preserved across evolutionary time. However, the sizes of introns...
Nuclear genes of euglenids and marine diplonemids harbor atypical, nonconventional introns which are not observed in the genomes of other eukaryotes. Nonconventional introns do not have the conserved ...
Recursive splicing, a process by which a single intron is removed from pre-mRNA transcripts in multiple distinct segments, has been observed in a small subset of Drosophila melanogaster introns. Howev...
Group II introns, the putative progenitors of spliceosomal introns and retrotransposons, are ribozymes that are capable of self-splicing and DNA invasion. In the cell, group II introns form ribonucleo...
Objective: The study was performed to evaluate the effect of a standardized hypnosis treatment used in general practice for patients with chronic widespread pain (CWP). Design: A randomiz...
This is a randomized, double-blind, placebo-controlled exploratory trial to investigate efficacy and safety of food supplement IGN-ES001 in patients with chronic widespread pain (CWP) with...
Patients who fulfilled inclusion criteria and consented to participate received either treatment as usual at the clinic, or were enrolled in a group-therapy based intervention, the multi-d...
The aim is to evaluate a novel treatment routine where contact through a smart phone/computer is used for online support for patients suffering from chronic widespread pain (CWP). The outl...
Background: Chronic Widespread Pain (CWP) is a multidimensional disorder for which treatment as yet remains unsatisfactory. Acupuncture is one of the most sought therapeutic methods when i...
Sequences of DNA in the genes that are located between the EXONS. They are transcribed along with the exons but are removed from the primary gene transcript by RNA SPLICING to leave mature RNA. Some introns code for separate genes.
A subcategory of chaperonins found in ARCHAEA and the CYTOSOL of eukaryotic cells. Group II chaperonins form a barrel-shaped macromolecular structure that is distinct from GROUP I CHAPERONINS in that it does not utilize a separate lid like structure to enclose proteins.
Group II chaperonins found in species of ARCHAEA.
A highly malignant subset of neoplasms arising from the endometrial stroma. Tumors in this group infiltrate the stroma with a wide range of atypia cells and numerous mitoses. They are capable of widespread metastases (NEOPLASM METASTASIS).
The parts of a transcript of a split GENE remaining after the INTRONS are removed. They are spliced together to become a MESSENGER RNA or structural RNA.
Bioinformatics is the application of computer software and hardware to the management of biological data to create useful information. Computers are used to gather, store, analyze and integrate biological and genetic information which can then be applied...