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R1003

Sigma-Aldrich

Ribonuclease T1 from Aspergillus oryzae

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

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Synonym(s):
Guanyloribonuclease, Ribonucleate 3′-guanylo-oligonucleotidohydrolase
CAS Number:
9026-12-4
Enzyme Commission number:
3.1.27.3 (BRENDA, IUBMB)
EC Number:
232-809-1
MDL number:
MFCD00132191
UNSPSC Code:
12352204
NACRES:
NA.54

biological source

Aspergillus sp. (Aspergillus oryzae)

Quality Level

200

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 .

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

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Regulatory Information

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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)
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.
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
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
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
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