What kinds of proteins are usually recognized by the cap of a proteasome?
A)proteins with a single ubiquitin
B)naked proteins
C)precipitated proteins
D)polyubiquitinated proteins
E)lysinated proteins

Question

What kinds of proteins are usually recognized by the cap of a proteasome?
A)proteins with a single ubiquitin
B)naked proteins
C)precipitated proteins
D)polyubiquitinated proteins
E)lysinated proteins

Quizplus · Accepted Answer

The cap of a proteasome recognizes polyubiquitinated proteins. Ubiquitination is a post-translational modification in which ubiquitin is attached to a substrate protein. Polyubiquitination refers to the attachment of multiple ubiquitin molecules to the same substrate protein, which targets it for degradation by the proteasome. The cap of the proteasome recognizes the polyubiquitin chain and initiates degradation of the substrate protein.

What Kinds of Proteins Are Usually Recognized by the Cap