Proteasome

Function

Proteasome (PRTS) are large protein complexes which degrade unneeded proteins into small polypeptides^[1]. The 26S PRTS is composed of a central 20S core particle which contains 4 stacked rings each with several members and two 19S caps. The 19S cap is composed of a base with 10 proteins six of which are ATPases and a lid which contains 9 proteins which bind polyubiquitin.

For more details see 3unb.

Structural highlights

The core particle two outer rings contain 7 α subunits (Y7, Y13, PRE6, PRE5, PUP2, C1, C7-α) which form the PRTS gate. The two inner rings contain 7 β subunits (PRE2, PRE4, PRE3, PUP1, PUP3, C5, C11) with protease activity^[2].

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of chain H.
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Yeast proteasome 20S core complex with salinosporamide derivative, 3gpt

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3D Structures of Proteasome3D Structures of Proteasome

Updated on 20-September-2017

ReferencesReferences

↑ Saeki Y, Tanaka K. Assembly and function of the proteasome. Methods Mol Biol. 2012;832:315-37. doi: 10.1007/978-1-61779-474-2_22. PMID:22350895 doi:http://dx.doi.org/10.1007/978-1-61779-474-2_22
↑ Coux O, Tanaka K, Goldberg AL. Structure and functions of the 20S and 26S proteasomes. Annu Rev Biochem. 1996;65:801-47. PMID:8811196 doi:http://dx.doi.org/10.1146/annurev.bi.65.070196.004101

Proteopedia Page Contributors and Editors (what is this?)Proteopedia Page Contributors and Editors (what is this?)

Alexander Berchansky, Michal Harel, Joel L. Sussman, Jaime Prilusky

[1] Saeki Y, Tanaka K. Assembly and function of the proteasome. Methods Mol Biol. 2012;832:315-37. doi: 10.1007/978-1-61779-474-2_22. PMID:22350895 doi:http://dx.doi.org/10.1007/978-1-61779-474-2_22

[2] Coux O, Tanaka K, Goldberg AL. Structure and functions of the 20S and 26S proteasomes. Annu Rev Biochem. 1996;65:801-47. PMID:8811196 doi:http://dx.doi.org/10.1146/annurev.bi.65.070196.004101

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