Secretion of circular proteins using sortase

Karin Strijbis, Hidde L Ploegh

Research output: Chapter in Book/Report/Conference proceedingChapterAcademicpeer-review

Abstract

Circular proteins occur naturally and have been found in microorganisms, plants, and eukaryotes where they are commonly involved in host defense. Properties of circular proteins include enhanced resistance to exoproteases, increased thermostability, longer life spans, and increased activity. Using an enzymatic approach based on the bacterial sortase A (SrtA) transpeptidase, N- and C-termini of conventional linear proteins can be linked resulting in a circular protein. Circularization of bioengineered linear substrate proteins can indeed confer the desirable properties associated with circular proteins. Here, we describe how cells can be manipulated to secrete circularized proteins for substrates of choice via sortase-mediated circularization in the lumen of the endoplasmic reticulum.

Original languageEnglish
Title of host publicationExocytosis and Endocytosis
EditorsAndrei I. Ivanov
PublisherHumana Press
Pages73-83
Number of pages11
VolumeII
EditionSecond edition
ISBN (Electronic)978-1-4939-0944-5
ISBN (Print)978-1-4939-0943-8
DOIs
Publication statusPublished - 2014

Publication series

NameMethods in Molecular Biology
Volume1174
ISSN (Print)1064-3745

Keywords

  • Sortase (SrtA)
  • Protein circularization
  • Intracellular sortagging
  • Endoplasmic reticulum
  • Secretion

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