Ananain

Ananain (EC 3.4.22.31, stem bromelain, fruit bromelain) is an enzyme.^[1]^[2] This enzyme catalyses the following chemical reaction

Hydrolysis of proteins with broad specificity for peptide bonds. Best reported small molecule substrate Bz-Phe-Val-Arg-NHMec

This enzyme is isolated from stem of pineapple plant, Ananas comosus.

References

^ Rowan AD, Buttle DJ, Barrett AJ (November 1988). "Ananain: a novel cysteine proteinase found in pineapple stem". Archives of Biochemistry and Biophysics. 267 (1): 262–70. doi:10.1016/0003-9861(88)90031-8. PMID 3196029.
^ Rowan AD, Buttle DJ, Barrett AJ (March 1990). "The cysteine proteinases of the pineapple plant". The Biochemical Journal. 266 (3): 869–75. PMC 1131219. PMID 2327970.

Ananain at the U.S. National Library of Medicine Medical Subject Headings (MeSH)

v t e Proteases: cysteine proteases (EC 3.4.22)
Caspase	Caspase 1 Caspase 2 Caspase 3 Caspase 4 Caspase 5 Caspase 6 Caspase 7 Caspase 8 Caspase 9 Caspase 10 Caspase 12 Caspase 13 Caspase 14
Fruit-derived	Papain Ficain Bromelain Actinidain
Calpain	CAPN1 CAPN2 CAPN3 CAPN5 CAPN6 CAPN7 CAPN8 CAPN9 CAPN10 CAPN11 CAPN12 CAPN13 CAPN14 CAPNS1 CAPNS2
Cathepsin	B C F H K L1/L2 O S W Z
Other	Clostripain Cancer procoagulant Separase Autophagin Cruzipain 3C-like protease Gingipain R Gingipain K

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)