Heritable activity: a prion that propagates by covalent autoactivation.

Abstract:

:Known prions (infectious proteins) are self-propagating amyloids or conformationally altered proteins, but in theory an enzyme necessary for its own activation could also be a prion (or a gene composed of protein). We show that yeast protease B is such a prion, called [beta].[beta] is infectious, reversibly curable, and its de novo generation is induced by overexpression of the pro-protease. Present in normal cells but masked by the functionally redundant protease A, [beta] is advantageous during starvation and necessary for sporulation. We propose that other enzymes whose active, modified, form is necessary for their maturation might also be prions.

journal_name

Genes Dev

journal_title

Genes & development

authors

Roberts BT,Wickner RB

doi

10.1101/gad.1115803

subject

Has Abstract

pub_date

2003-09-01 00:00:00

pages

2083-7

issue

17

eissn

0890-9369

issn

1549-5477

pii

1115803

journal_volume

17

pub_type

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