NEW CANDIDA NORVEGICA STRAIN, CRM-9802 CONTAINING HIGH CONCENTRATION OF RIBONUCLEIC ACID

摘要

PURPOSE: New strain of Candidanorvegica, CRM-9802 (KCTC 8900P) containing high concentration of ribonucleic acid (RNA) is provided which is used to manufacture a nucleotide spice from RNA of Candida cell extract. CONSTITUTION: Soil sample is mixed with sterile saline and vortexed. The supernatant is plated on YM agar and incubated at 30°C for 24-48 hours. The isolated colony is cultured and RNA content of each colony is measured. The colony showing high content of RNA is selected and its morphological, physiological and cultural characteristics are identified. The isolated yeast forms creamy egg shape colony on YM plate and does not make spores. The range of temperature for growth is from 15 to 35°C. Under anaerobic condition it metabolizes D-glucose and D-cellobiose as carbon sources. On the other hand, D-xylose, L-rhamnose, cellobios, salicin, arbutin, glycerol, D-glucitol, citrate and ethanol can be metabolized at aerobic conditions. Nitrate, nitrite, L-lysine and creatine can be used as a nitrogen source at aerobic conditions. The yeast is cultured in YM medium and harvested at 10 OD and RNA content of cell is measured by orcinol method. The RNA content of Candida norvegica is 12-13% of cell mass.