Please use this identifier to cite or link to this item: http://hdl.handle.net/2381/15078
Title: Genome sequence of the Fleming strain of Micrococcus luteus, a simple free-living actinobacterium
Authors: Young, M.
Artsatbanov, V.
Beller, H. R.
Chandra, G.
Chater, K. F.
Dover, L. G.
Goh, E. B.
Kahan, T.
Kaprelyants, A. S.
Kyrpides, N.
Lapidus, A.
Lowry, S. R.
Lykidis, A.
Mahillon, J.
Markowitz, V.
Mavromatis, K.
Mukamolova, Galina V.
Oren, A.
Rokem, J. S.
Smith, M. C.
Young, D. I.
Greenblatt, C. L.
First Published: Feb-2010
Citation: Journal of Bacteriology, 2010, 192 (3), pp. 841-860
Abstract: Micrococcus luteus (NCTC2665, "Fleming strain") has one of the smallest genomes of free-living actinobacteria sequenced to date, comprising a single circular chromosome of 2,501,097 bp (G+C content, 73%) predicted to encode 2,403 proteins. The genome shows extensive synteny with that of the closely related organism, Kocuria rhizophila, from which it was taxonomically separated relatively recently. Despite its small size, the genome harbors 73 insertion sequence (IS) elements, almost all of which are closely related to elements found in other actinobacteria. An IS element is inserted into the rrs gene of one of only two rrn operons found in M. luteus. The genome encodes only four sigma factors and 14 response regulators, a finding indicative of adaptation to a rather strict ecological niche (mammalian skin). The high sensitivity of M. luteus to beta-lactam antibiotics may result from the presence of a reduced set of penicillin-binding proteins and the absence of a wblC gene, which plays an important role in the antibiotic resistance in other actinobacteria. Consistent with the restricted range of compounds it can use as a sole source of carbon for energy and growth, M. luteus has a minimal complement of genes concerned with carbohydrate transport and metabolism and its inability to utilize glucose as a sole carbon source may be due to the apparent absence of a gene encoding glucokinase. Uniquely among characterized bacteria, M. luteus appears to be able to metabolize glycogen only via trehalose and to make trehalose only via glycogen. It has very few genes associated with secondary metabolism. In contrast to most other actinobacteria, M. luteus encodes only one resuscitation-promoting factor (Rpf) required for emergence from dormancy, and its complement of other dormancy-related proteins is also much reduced. M. luteus is capable of long-chain alkene biosynthesis, which is of interest for advanced biofuel production; a three-gene cluster essential for this metabolism has been identified in the genome.
DOI Link: 10.1128/JB.01254-09
eISSN: 1098-5530
Links: http://hdl.handle.net/2381/15078
http://jb.asm.org/content/192/3/841
Type: Journal Article
Appears in Collections:Published Articles, Dept. of Infection, Immunity and Inflammation

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