Amphinase

Crystallographic structure of amphinase.^[1]

Identifiers

Organism

Rana pipiens

Symbol

n/a

PDB

2P7S

UniProt

P85073

Other data

EC number

3.1.27

Search for
Structures	Swiss-model
Domains	InterPro

Amphinase is a ribonuclease enzyme found in the oocytes of the Northern leopard frog (Rana pipiens). Amphinase is a member of the pancreatic ribonuclease protein superfamily and degrades long RNA substrates.^[2] Along with ranpirnase, another leopard frog ribonuclease, amphinase has been studied as a potential cancer therapy due to its unusual mechanism of cytotoxicity tested against tumor cells.^[3]

References

^ Singh UP, Ardelt W, Saxena SK, Holloway DE, Vidunas E, Lee HS, Saxena A, Shogen K, Acharya KR (August 2007). "Enzymatic and structural characterisation of amphinase, a novel cytotoxic ribonuclease from Rana pipiens oocytes". Journal of Molecular Biology. 371 (1): 93–111. doi:10.1016/j.jmb.2007.04.071. PMID 17560606.
^ Singh UP, Ardelt W, Saxena SK, Holloway DE, Vidunas E, Lee HS, Saxena A, Shogen K, Acharya KR (August 2007). "Enzymatic and structural characterisation of amphinase, a novel cytotoxic ribonuclease from Rana pipiens oocytes". Journal of Molecular Biology. 371 (1): 93–111. doi:10.1016/j.jmb.2007.04.071. PMID 17560606.
^ Ardelt W, Shogen K, Darzynkiewicz Z (June 2008). "Onconase and amphinase, the antitumor ribonucleases from Rana pipiens oocytes". Current Pharmaceutical Biotechnology. 9 (3): 215–25. doi:10.2174/138920108784567245. PMC 2586917. PMID 18673287.

Hydrolase: esterases (EC 3.1)

3.1.1: Carboxylic
ester hydrolases

Cholinesterase
- Acetylcholinesterase
- Butyrylcholinesterase
Pectinesterase
6-phosphogluconolactonase
PAF acetylhydrolase

Lipase

Phospholipase
- A1
- A2
- B

3.1.2: Thioesterase

3.1.3: Phosphatase

3.1.4:
Phosphodiesterase

3.1.6: Sulfatase

Nuclease (includes
deoxyribonuclease
and ribonuclease)

3.1.11-16:
Exonuclease

Exodeoxyribonuclease	RecBCD
Exoribonuclease	Oligonucleotidase

3.1.21-31:
Endonuclease

Endodeoxyribonuclease	Deoxyribonuclease I Deoxyribonuclease II Deoxyribonuclease IV Restriction enzyme;see {{Restriction enzyme}} UvrABC endonuclease
Endoribonuclease	RNase III Drosha: Microprocessor complex Dicer: RNA-induced silencing complex RNase H 1 2A 2B 2C RNase P RNase A RNase Z RNase E 1 2 3 4/5 RNase T1
either deoxy- or ribo-	Nuclease S1 Mung bean nuclease Serratia marcescens nuclease Micrococcal nuclease

v t e Enzymes
Activity	Active site Binding site Catalytic triad Oxyanion hole Enzyme promiscuity Diffusion-limited enzyme Cofactor Enzyme catalysis
Regulation	Allosteric regulation Cooperativity Enzyme inhibitor Enzyme activator
Classification	EC number Enzyme superfamily Enzyme family List of enzymes
Kinetics	Enzyme kinetics Eadie–Hofstee diagram Hanes–Woolf plot Lineweaver–Burk plot Michaelis–Menten kinetics
Types	EC1 Oxidoreductases (list) EC2 Transferases (list) EC3 Hydrolases (list) EC4 Lyases (list) EC5 Isomerases (list) EC6 Ligases (list) EC7 Translocases (list)