| Recognition site | AAT↑ATT
TTA↓TAA |
| Source | E.coli strain, that carries the cloned gene SspI from Sphaerotilus species |
| Assayed on | Lambda DNA |
| Unit definition | One unit of the enzyme is the amount required to hydrolyze 1 μg of Lambda DNA in 1 hour at 37°C in a total reaction volume of 50 μl. |
| Optimal SE-buffer | K (10 mM Tris-HCl (pH 7.6 at 250C); 10 mM MgCl2; 100 mM KCl; 1 mM DTT.) + BSA |
| Enzyme activity (%) | | B | G | O | W | Y | R | | 75 - 100 | 50 - 75 | 25 - 50 | 50 - 75 | 75 - 100 | 100 |
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| Optimal temperature | 37oC |
| Storage conditions | 10 mM Tris-HCl (pH 7.5); 200 mM NaCl; 0,1 mM EDTA; 1 mM DTT; 200 μg/ml BSA; 50% glycerol. Store at -20°C. |
| Ligations | After 10-fold overdigestion with enzyme 90% of the DNA fragments can be ligated and recut. |
| Non-specific hydrolisis | No nonspecific activity was detected after incubation of 1 μg of Lambda DNA with 20 u.a. of enzyme for 16 hours at 37°C.
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| Reagents Supplied with Enzyme |
10 X SE-buffer K, BSA |
| Methylation sensitivity | Blocked by methylation AmATATT. |
| Inactivation 20 minutes under | 65oC |
| Notes | High enzyme concentration may result in star activity.
To obtain 100% activity, BSA should be added to the 1 x reaction mix to a final concentration of 100 μg/ml.
Do not use BSA for long incubation.
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| MSDS: | Download MSDS as PDF |
| References: | Schildkraut, I., Grandoni, R. unpublished observations.
 Chernukhin V.A, Abdurashitov M.A., Tomilov V.N., Gonchar D.A., Degtyarev S.Kh. Comparative analysis of mouse chromosomal DNA digestion with restriction endonucleases in vitro and in silico // "Ovchinnikov bulletin of biotechnology and physical and chemical biology" V.3, No 4, pp 19-27, 2007
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Theoretical diagrams of DNA digestion by this enzyme for the most known DNA substrates:
To view the fragments length values please point mouse cursor over diagram |
M - ladder, 1 - Adeno-2 DNA, 2 - Lambda DNA, 3 - T7 DNA, 4 - pUC19, 5 - pBR322
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