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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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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


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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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Ribonuclease T1: Structure, Function, and Stability
Pace, CN; Heinemann U, et al.
Angewandte Chemie (International Edition in English), 4, 343-360 (1991)
Elisa Bombarda et al.
The journal of physical chemistry. B, 114(5), 1994-2003 (2010-01-22)
Because of their central importance for understanding enzymatic mechanisms, pK(a) values are of great interest in biochemical research. It is common practice to determine pK(a) values of amino acid residues in proteins from NMR or FTIR titration curves by determining
Catherine Brands et al.
Journal of visualized experiments : JoVE, (160) (2020-07-07)
In situ hybridization is a powerful technique to identify specific RNA or DNA sequences within individual cells in tissue sections, providing important insights into physiological processes and disease pathogenesis. In situ hybridization (ISH) has been used for many years to
Herry Martadinata et al.
Biochemistry, 50(29), 6455-6461 (2011-06-16)
The discovery of long RNA transcripts of telomeric repeats (TERRA) and their potential to form G-quadruplexes stimulated studies on the possible arrangements of G-quadruplexes along TERRA. Here we performed ribonuclease protection assay to investigate the structures formed by long human
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.

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.

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  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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