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R1003

Sigma-Aldrich

Ribonuclease T1 from Aspergillus oryzae

ammonium sulfate suspension, 300,000-600,000 units/mg protein

Synonym(s):

Guanyloribonuclease, Ribonucleate 3′-guanylo-oligonucleotidohydrolase

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Estimated to ship onMay 17, 2025


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100000 UNITS
$101.00
500000 UNITS
$456.00

About This Item

CAS Number:
Enzyme Commission number:
EC Number:
MDL number:
UNSPSC Code:
12352204
NACRES:
NA.54

$101.00


Estimated to ship onMay 17, 2025


Request a Bulk Order

biological source

Aspergillus sp. (Aspergillus oryzae)

Quality Level

form

ammonium sulfate suspension

specific activity

300,000-600,000 units/mg protein

mol wt

11068 by amino acid sequence

technique(s)

cell based assay: suitable

suitability

suitable for separating native or denatured proteins, or nucleic acids

application(s)

cell analysis

storage temp.

2-8°C

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Application

Ribonuclease T1 (RNase T1) from Aspergillus oryzae is used to digest denatured RNA prior to sequencing and is used for protein folding studies [1].

Biochem/physiol Actions

Ribonuclease T1 (RNase T1) from Aspergillus oryzae is an endoribonuclease that hydrolyzes after G residues. Cleavage occurs between the 3′-phosphate group of a guanidine ribonucleotide and 5′-hydroxyl of the adjacent nucleotide. The initial product is a 2′:3′ cyclic phosphate nucleoside that is hydrolyzed to the corresponding 3′-nucleoside phosphate. It differs from Pancreatic RNase in that it attacks the guanine sites specifically to yield 3′-GMP and oligonucleotides with a 3′-GMP terminal group.

Unit Definition

One unit will produce acid soluble oligonucleotides equivalent to a ΔA260 of 1.0 in 15 min at pH 7.5 at 37°C, in a reaction volume of 1.0 mL. Substrate: Yeast RNA.

Physical form

Suspension in 2.8 M (NH4)2SO4 solution

Analysis Note

Protein determined by E1%/280

Storage Class

10 - Combustible liquids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves


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S Dubey et al.
Journal of controlled release : official journal of the Controlled Release Society, 152(3), 356-362 (2011-03-15)
Cathodal iontophoresis of anionic macromolecules has been considered a major challenge owing to (i) the presence of a negative charge on the skin under physiological conditions and (ii) the electroosmotic solvent flow in the (opposite) anode-to-cathode direction. Moreover, electroosmosis, and
Isil Severcan et al.
Nature chemistry, 2(9), 772-779 (2010-08-24)
Supramolecular assembly is a powerful strategy used by nature to build nanoscale architectures with predefined sizes and shapes. With synthetic systems, however, numerous challenges remain to be solved before precise control over the synthesis, folding and assembly of rationally designed
C Nick Pace et al.
Journal of molecular biology, 408(3), 514-528 (2011-03-08)
Our goal was to gain a better understanding of the contribution of hydrophobic interactions to protein stability. We measured the change in conformational stability, Δ(ΔG), for hydrophobic mutants of four proteins: villin headpiece subdomain (VHP) with 36 residues, a surface
Rasmus Lybech Jensen et al.
Journal of the American Chemical Society, 134(23), 9820-9826 (2012-05-19)
Singlet molecular oxygen, O(2)(a(1)Δ(g)), can influence many processes pertinent to the function of biological systems, including events that result in cell death. Many of these processes involve a reaction between singlet oxygen and a given amino acid in a protein.
Scott Quarrier et al.
RNA (New York, N.Y.), 16(6), 1108-1117 (2010-04-24)
Structure mapping experiments (using probes such as dimethyl sulfate [DMS], kethoxal, and T1 and V1 RNases) are used to determine the secondary structures of RNA molecules. The process is iterative, combining the results of several probes with constrained minimum free-energy

Articles

Instructions for working with enzymes supplied as ammonium sulfate suspensions

Questions

1–2 of 2 Questions  
  1. This product was in powder form before and is now in liquid form. Do you still have to inactivate 20 min at 80°C before use? Thank you very much

    1 answer
    1. This product is an ammonium sulfate suspension. This is an enzyme, and batch-specific Certificates of Analysis report the activity of the enzyme. Most customers use it as an active enzyme. Please reach out to local technical support for clarification on using the inactivated form of the enzyme.

      Helpful?

  2. Is it possible to store this product frozen at -20°C?

    1 answer
    1. Storing ammonium sulfate suspensions of proteins frozen can lead to the removal of ammonium sulfate from the protein crystal structure. This exposes the protein to a high amount of ammonium sulfate, potentially causing denaturation due to high salt content. Consequently, the enzyme activity may decrease, as may have occurred in this instance. It is recommended that the customer purchase a new bottle and store it at 2-8°C.

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