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Four strains contained multiple plasmids (8\u201312), which varied significantly in size (from 4,135 to 287,630\u2009bp) and genetic structure; the fifth strain contained only two plasmids. All large plasmids and some medium-size and small plasmids contained genes encoding resistance to various heavy metals, including mercury, cobalt, zinc, cadmium, copper, chromium, and arsenic compounds. Most resistance genes found in the ancient strains of<jats:italic>A<\/jats:italic>.<jats:italic>lwoffii<\/jats:italic>had their closely related counterparts in modern clinical<jats:italic>A<\/jats:italic>.<jats:italic>lwoffii<\/jats:italic>strains that were also located on plasmids. The vast majority of the chromosomal resistance determinants did not possess complete sets of the resistance genes or contained truncated genes. Comparative analysis of various<jats:italic>A<\/jats:italic>.<jats:italic>lwoffii<\/jats:italic>and of<jats:italic>A<\/jats:italic>.<jats:italic>baumannii<\/jats:italic>strains discovered a number of differences between them: (i) chromosome sizes in<jats:italic>A<\/jats:italic>.<jats:italic>baumannii<\/jats:italic>exceeded those in<jats:italic>A<\/jats:italic>.<jats:italic>lwoffii<\/jats:italic>by about 20%; (ii) on the contrary, the number of plasmids in<jats:italic>A<\/jats:italic>.<jats:italic>lwoffii<\/jats:italic>and their total size were much higher than those in<jats:italic>A<\/jats:italic>.<jats:italic>baumannii<\/jats:italic>; (iii) heavy metal resistance genes in the environmental<jats:italic>A<\/jats:italic>.<jats:italic>lwoffii<\/jats:italic>strains surpassed those in<jats:italic>A<\/jats:italic>.<jats:italic>baumannii<\/jats:italic>strains in the number and diversity and were predominantly located on plasmids. Possible reasons for these differences are discussed.<\/jats:p>","DOI":"10.1155\/2016\/3970831","type":"journal-article","created":{"date-parts":[[2016,10,4]],"date-time":"2016-10-04T21:19:29Z","timestamp":1475615969000},"page":"1-9","source":"Crossref","is-referenced-by-count":38,"title":["Resistance of Permafrost and Modern<i>Acinetobacter lwoffii<\/i>Strains to Heavy Metals and Arsenic Revealed by Genome Analysis"],"prefix":"10.1155","volume":"2016","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5011-280X","authenticated-orcid":true,"given":"Sofia","family":"Mindlin","sequence":"first","affiliation":[{"name":"Institute of Molecular Genetics, Russian Academy of Sciences, Kurchatov Sq. 2, Moscow 123182, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6951-3996","authenticated-orcid":true,"given":"Anatolii","family":"Petrenko","sequence":"additional","affiliation":[{"name":"Institute of Molecular Genetics, Russian Academy of 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