Cellulosimicrobium

Abstract

Cel.lu.lo.si.mi.cro'bi.um. N.L. n. cellulosum cellulose; N.L. neut. n. microbium, microbe; N.L. neut. n. Cellulosimicrobium cellulose microbe.

Actinobacteria / Actinobacteria / Micrococcales / Promicromonosporaceae / Cellulosimicrobium

Gram-stain-positive, but cells are very readily decolorized. In young cultures, a substrate mycelium is produced which fragments later into irregular, curved, and club-shaped rods which may be arranged in V forms. After exhaustion of the medium, the rods are transformed into shorter rods or even spherical cells. Do not form endospores. Not acid-fast. Motile or nonmotile. Chemo-organotrophic; metabolism respiratory and facultatively anaerobic. Acid produced from several carbohydrates. Catalase positive. Nitrate reduction is positive or negative. Cellulolytic. Peptidoglycan contains l-lysine; the interpeptide bridge consists of d-Ser–d-Asp or l-Thr–d-Asp, type A4α. Major menaquinone is MK-9(H₄), and predominating fatty acids are C_15:0 anteiso, C_15:0 iso, C_16:0 iso, and C_17:0 anteiso. Whole-cell sugars are galactose, rhamnose, glucose, fucose, and mannose or galactose and ribose; one type strain contains only galactose. Phylogenetically, a member of the family Promicromonosporaceae.

DNA G+C content (mol%): 72.9–76.5 (T_m).

Type species: Cellulomicrobium cellulans (Metcalfe and Brown 1957) Schumann, Weiss and Stackebrandt, 2001, 1009^VP (Nocardia cellulans Metcalfe and Brown 1957).