Micrococcus species

Lactobacillus delbrueckii. In 1953, Rodwell suggested that the histidine decarboxylase of Lactobacillus 30a was not dependent upon pyridoxal phosphate (11). Rodwell based his suggestion upon the fact that the organism lost its ability to decarboxylate ornithine but retained high histidine decarboxylase activity when grown in media deficient in pyridoxine. It was not until 1965 that E. E. Snell and coworkers (12) isolated the enzyme and showed that it was, indeed, free of pyridoxal phosphate. Further advances in characterization of the enzyme were made by Riley and Snell (13) and Recsei and Snell (14) who demonstrated the existence of a pyruvoyl residue and the participation of the pyruvoyl residue in histidine catalysis by forming a Schiff base intermediate in a manner similar to pyridoxal phosphate dependent enzymes. Recent studies by Hackert et al. (15) established the subunit structure of the enzyme which is similar to the subunit structure of a pyruvoyl decarboxylase of a Micrococcus species (16). 

Attri, D. and Joshi, V. K. (2005). Optimization of apple pomace based medium and fermentation conditions for pigment production by Micrococcus species.. Sci. Ind. 64,598-601. 

Bhowmik, T., and Marth, E. H. (1990a). Esterases of Micrococcus species. Identification and partial characterization. J. Dairy Scl 73, 33-40. 

The lipids of prokaryotes have been reviewedUnlike higher plants, bacteria (with the exception of mycobacteria) do not usually contain significant amounts of waxes in their surface layers. Lipid droplets are infrequently seen internally—in Acinetobacter species these may contain up to 12% alkanes mainly as the n-Cj compound . The main interest surrounding the alkane composition has been its use in differentiating species of micrococci (in which hydrocarbons may contain up to 20% of total lipid) from staphylococci, which lack hydrocarbons. Two Sarcina species were found to contain the same hydrocarbon pattern and have been reclassified on the basis of this and other criteria as a single Micrococcus species . 

Of the isolated from each of the three groups, Arthrobacter, Bacillus, and Pseudomonas one-third to one-half were able to grow on biopolymer G2 with 30 ppm formaldehyde, and 60-100 percent were supported by the hydrocarbon mixture. Two other isolates, identified as Micrococcus and Citrobacter species, were able to utilize the hydrocarbon mixture only. Only one isolate was able to utilize the polyacrylamide B. The isolate has tentatively been identified as a Micrococcus species, but such nutritional flexibility is unusual with this species and the isolate s identity should be re-examined. 

Bhowmik T, Marth EH. Protease and peptidase activity of Micrococcus species. J Dairy Sci 1988 71 2358-2365. 

Evidence has been presented to show that at least three lipid intermediates participate in the synthesis of the three glycerol phosphate residues which represent the linkage unit between the teichoic acids and peptidoglycan of Staphylococcus aureus H and a Micrococcus species. The structures of the... 

Benka-Coker, M.O. and Ekundayo, J.A., Effects of heavy metals on growth of species of Micrococcus and Pseudomonas in a crude oil/mineral salts medium, Bioresour Technol, 66 (3), 241-245, 1998. 

Lysozyme is an enzyme that hydrolyzes some bacterial cell-walls, the bacterium used for the assay being Micrococcus lysodeikticus. Lysozyme is found in a wide variety of species and locations, including bacteriophages, blood, egg white, gastric secretions, milk, nasal mucus, papaya, sputum, and tears. The outstanding achievement in this field has been the elucidation of the crystal structures of some of the lysozyme-substrate complexes. 

Forney has produced a sensitization of guinea-pigs to Micrococcus pyogenes by injection of killed bacillary bodies of this species together with crude wax of tubercle bacillus or M. smegmatis. 

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