Monosiga brevicollis Ruinen (ATCC® PRA-258)

Strain Designations: MX1  /  Depositor: Nicole King  /  Biosafety Level: 1

Permits and Restrictions

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Strain Designations MX1
Biosafety Level 1

Biosafety classification is based on U.S. Public Health Service Guidelines, it is the responsibility of the customer to ensure that their facilities comply with biosafety regulations for their own country.

Isolation ATCC® 50154™
Product Format frozen
Storage Conditions Frozen Cultures:
-70°C for 1 week; liquid N2 vapor for long term storage

Freeze-dried Cultures:

Live Cultures:
See Protocols section for handling information
Type Strain no
Genome Sequenced Strain


Genome strain developed from ATCC 50154
Contains Flavobacterium sp. as single bacterial food source
Genome sequencing strain (DOE)
Medium ATCC® Medium 1525: Seawater 802 medium
Growth Conditions
Temperature: 25°C
Cryopreservation Reagents
Cryoprotective Solution
DMSO: 2.0 mL
Fresh growth medium w/o bacteria: 8.0 mL

Harvesting and Preservation
  1. Mix the components in the order listed. When the medium is added to the DMSO the solution will warm up due to chemical heat.
  2. Harvest cells from a culture that is at or near peak density by filtration and centrifugation at 800 x g for 5 min.
  3. Adjust the concentration of cells at least 2 x 106/mL in fresh medium.
  4. Mix the cell preparation and the cryoprotective solution in equal portions.
  5. Dispense in 0.5 mL aliquots into 1.0 mL to 2.0 mL sterile plastic screw-capped cryules (special plastic vials for cryopreservation).
  6. Place vials in a controlled rate freezing unit. From room temperature cool at -1°C/min to -40°C. If freezing unit can compensate for the heat of fusion, maintain rate at -1 C/min through heat of fusion. At -40°C plunge ampules into liquid nitrogen. Alternatively, place the vials in a Nalgene 1°C freezing apparatus.  Place the apparatus at -80°C for 1.5 to 2 hours and then plunge ampules into liquid nitrogen.  (The cooling rate in this apparatus is approximately -1°C/min.)  
  7. Ampules are stored in either the vapor or liquid phase of a nitrogen refrigerator.
  8. To establish a culture from the frozen state place the vial in a 35°C water bath.  Immerse the vial to a level just above the surface of the frozen material. Do not agitate the vial.   Immediately after thawing, do not leave in water bath, aseptically remove the contents of the ampule and inoculate into a T-25 tissue culture flask containing 10 mL uninoculated ATCC medium 1525.
  9. Incubate at 25°C with the cap screwed on tightly.
  10. Once the culture is established, vigorously agitate the flask and aseptically transfer 0.5 mL to 10.0 mL of uninoculated ATCC medium 1525.
  11. Follow the protocol for maintenance of culture.
Name of Depositor Nicole King

Abedin M and King N. The premetazoan ancestry of cadherins. Science 319:946-948, 2008. PubMed:18276888

King N, et al. The genome of the choanoflagellate Monosiga brevicollis and the origin of metazoans. Nature 451:783-788, 2008. PubMed:18273011

Cross References

Nucleotide (GenBank) : ABFJ01000000 Monosiga brevicollis MX1, whole genome shotgun sequencing project.

Notice: Necessary PermitsPermits

These permits may be required for shipping this product:

  • Customers located in the state of Hawaii will need to contact the Hawaii Department of Agriculture to determine if an Import Permit is required. A copy of the permit or documentation that a permit is not required must be sent to ATCC in advance of shipment.
Basic Documentation
  1. Species of Flavobacterium in Monosiga brevicollis, ATCC PRA-258
    ATCC has never accessioned the strain of
    Date Updated: 8/8/2014
  2. Non-moving Monosiga Cells
    Yes, it typical for Monosiga species, such as 
    Date Updated: 7/25/2012