Proteasome Proteasomes are protein complexes which degrade unneeded or damaged proteins by proteolysis, a chemical reaction that breaks peptide bonds. Enzymes that help such reactions are called proteases. Proteasomes are part of a major mechanism by w ...

endopeptidase complex (, ''ingensin'', ''macropain'', ''multicatalytic endopeptidase complex'', ''prosome'', ''multicatalytic proteinase (complex)'', ''MCP'', ''proteasome'', ''large multicatalytic protease'', ''proteasome organelle'', ''alkaline protease'', ''26S protease'', ''tricorn proteinase'', ''tricorn protease'') is an

enzyme Enzymes () are proteins that act as biological catalysts by accelerating chemical reactions. The molecules upon which enzymes may act are called substrates, and the enzyme converts the substrates into different molecules known as products. A ...

. This enzyme catalyses the following

chemical reaction A chemical reaction is a process that leads to the IUPAC nomenclature for organic transformations, chemical transformation of one set of chemical substances to another. Classically, chemical reactions encompass changes that only involve the pos ...

: Cleavage of

peptide bond In organic chemistry, a peptide bond is an amide type of covalent chemical bond linking two consecutive alpha-amino acids from C1 (carbon number one) of one alpha-amino acid and N2 (nitrogen number two) of another, along a peptide or protein cha ...

s with very broad specificity This 20-S protein is composed of 28 subunits arranged in four rings of seven.

References

External links

* {{Portal bar, Biology, border=no EC 3.4.25