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Restriction Endonuclease

Home > PRODUCTS > Restriction Endonuclease

SnaB I (Eco105 I)

No Product Name Cat.# Conc Size Price(₩) Add
1 SnaB I R027S 5 units/µl 500 units ₩ 57,000 추가
2 SnaB I R027M 5 units/µl 1,000 units ₩ 102,600 추가
3 SnaB I R027L 5 units/µl 2,500 units ₩ 228,000 추가
4 SnaB I R027H 25 units/µl 2,500 units ₩ 228,000 추가
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Recognition & cleavage sequence


Source: Sphaerotilus natans


Isoschizomer : BstSNI, Eco105I

 

Reaction conditions

1X EzBuffer IV, 37

1X FastCut Buffer, 37

 

FastCut Buffer

Enzynomics restriction enzyme can cut substrate DNA in 5-15 min with FastCut Buffer

 

1X EzBuffer IV

20 mM Tris-acetate (pH 7.9 @ 25), 50 mM potassium acetate, 10 mM magnesium acetate, 100 μg/ml BSA

 

Unit definition

One unit is defined as the amount of enzyme required for complete digestion of 1-μg bacteriophage λ at 37 for 1 hr in 50-μl reaction mixtures.

 

Storage

10 mM Tris-HCl (pH 7.4 @ 25), 50 mM KCl, 0.1 mM EDTA, 1 mM dithiothreitol, 200 μg/ml BSA, 50% glycerol.

 

Dilution buffer: EzDiluent A

10 mM Tris-HCl (pH 7.4 @ 25), 50 mM KCl, 0.1 mM EDTA, 1 mM dithiothreitol, 200 μg/ml BSA, 50% glycerol.

 

Heat Inactivation

SnaB I can be inactivated at 80 for 20 min.

 

Methylation sensitivity

dam methylation: Not sensitive

dcm methylation: Not sensitive

CpG methylation: sensitive

 

Prolonged incubation

A minimum amount of enzyme required to digest 1-μg substrate DNA for 16 hr; 0.13 U.

 

Relative activity in EzBuffers

EzBuffer I: 100%

EzBuffer II: 75%

EzBuffer III: 25%

EzBuffer IV: 100%

FastCut Buffer: 100%

 

Note

Cleavage of mammalian genomic DNA is blocked by CpG methylation. Incubation should not exceed 3 hrs. Reaction condition of low salt, excess enzyme, excess glycerol (>5%) or high pH (>8.0) may result in star activity.

● Material Safety Data Sheet

- Enzynomics_MSDS_R027_SnaB I

 

● Quality control

Overdigestion assay

DNA digested for 16 hr in 50-μl reaction with 100 U of enzyme resulted in same the DNA band patterns as those obtained with 1 U of enzyme for 1 hr.

 

Endonuclease assay

Less than 5% of 1-μg of ΦX174 RFI is converted to RFII when the DNA is incubated with 50 U of enzyme at 37 for 4hr in 50-μl reaction. 

 

Ligation and recutting

More than 95% of DNA fragments (1 μg) digested with 50-fold excess enzyme can be ligated by T4 DNA ligase (400 U) at 16 for 16 hr. Of the ligation products, > 95% can be re-cut. 

 

Blue/white screening

To test the integrity of DNA ends, a plasmid, pSKM2 containing a unique site in the lacZ alpha gene is digestesd with 10-fold excess enzyme, ligated, and introduced into DH5α. The transformed cells are plated on X-gal/IPTG/Amp plates. The number of blue and white colonies formed are measured. Blue colonies indicate that an intactness of the test gene is maintained during the cleavage/ligation process. In contrast, white colonies fail to do so. Fewer than 1% white colonies are formed with enzyme.

 

Extreme pure (EP)

No detectable degradation of 32P-end labeled single-stranded and double-stranded (5’-, 3’-overhang and blunt end) oligonucleotides occurred during incubation with 100 U of enzyme for 4 hr.

 

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