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  • Title: IS1222: analysis and distribution of a new insertion sequence in Enterobacter agglomerans 339.
    Author: Steibl HD, Lewecke FM.
    Journal: Gene; 1995 Apr 14; 156(1):37-42. PubMed ID: 7737514.
    Abstract:
    With a length of 1221 bp and 44-bp inverted repeats with ten mismatches, IS1222 was identified as an endogenous insertion sequence in Enterobacter agglomerans 339. In this host strain, four copies were located, three on the nif plasmid pEA9 and one at the chromosome. Sequence analysis showed two consecutive open reading frames, orfA and orfB, encoding putative polypeptides of 87 and 276 amino acids. In-between both reading frames, a potential frameshift window of the homonucleotide type was postulated, followed by a pseudoknot structure and a ribosome-binding site. Based on significant homology at the sequence level and similarity of the features discussed, IS1222 was placed among the group of IS3 elements with IS407, IS476 and ISR1 being the most closely related IS. Hybridization experiments suggest that the distribution of IS1222 is limited to a group of related bacterial strains among Enterobacteriaceae.
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