what is BHET.what is the use of this
Answers
PETases are an esterase class of enzymes that catalyze the hydrolysis of polyethylene terephthalate (PET) plastic to monomeric mono-2-hydroxyethyl terephthalate (MHET). The idealized chemical reaction is (where n is the number of monomers in the polymer chain):[1]
PETase
PETase 5XH3 with HEMT-cartoon.png
Identifiers
EC number
3.1.1.101
Alt. names
PET hydrolase, poly(ethylene terephthalate) hydrolase
Databases
IntEnz
IntEnz view
BRENDA
BRENDA entry
ExPASy
NiceZyme view
KEGG
KEGG entry
MetaCyc
metabolic pathway
PRIAM
profile
PDB structures
RCSB PDB PDBe PDBsum
Search
PMC
articles
PubMed
articles
NCBI
proteins
(ethylene terephthalate)n + H2O → (ethylene terephthalate)n-1 + MHET
Trace amount of the PET breaks down to bis(2-hydroxyethyl) terephthalate (BHET). PETases can also break down PEF-plastic (polyethylene-2,5-furandicarboxylate), which is a bioderived PET replacement. PETases can't catalyze the hydrolysis of aliphatic polyesters like polybutylene succinate or polylactic acid.[2]
Non-enzymatic natural degradation of PET will take hundreds of years, but PETases can degrade PET in matter of days.[3]