Universität zu Köln

Perrar, Andreas ORCID: 0000-0003-3365-5575, Dissmeyer, Nico and Huesgen, Pitter F. (2019). New beginnings and new ends: methods for large-scale characterization of protein termini and their use in plant biology. J. Exp. Bot., 70 (7). S. 2021 - 2039. OXFORD: OXFORD UNIV PRESS. ISSN 1460-2431

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Abstract

Dynamic regulation of protein function and abundance plays an important role in virtually every aspect of plant life. Diversifying mechanisms at the RNA and protein level result in many protein molecules with distinct sequence and modification, termed proteoforms, arising from a single gene. Distinct protein termini define proteoforms arising from translation of alternative transcripts, use of alternative translation initiation sites, and different co- and post-translational modifications of the protein termini. Also site-specific proteolytic processing by endo- and exoproteases generates truncated proteoforms, defined by distinct protease-generated neo-N- and neo-C-termini, that may exhibit altered activity, function, and localization compared with their precursor proteins. In eukaryotes, the N-degron pathway targets cytosolic proteins, exposing destabilizing N-terminal amino acids and/or destabilizing N-terminal modifications for proteasomal degradation. This enables rapid and selective removal not only of unfolded proteins, but also of substrate proteoforms generated by proteolytic processing or changes in N-terminal modifications. Here we summarize current protocols enabling proteome-wide analysis of protein termini, which have provided important new insights into N-terminal modifications and protein stability determinants, protein maturation pathways, and protease-substrate relationships in plants.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Perrar, Andreas UNSPECIFIED orcid.org/0000-0003-3365-5575 UNSPECIFIED Dissmeyer, Nico UNSPECIFIED UNSPECIFIED UNSPECIFIED Huesgen, Pitter F. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-153657
DOI:	10.1093/jxb/erz104
Journal or Publication Title:	J. Exp. Bot.
Volume:	70
Number:	7
Page Range:	S. 2021 - 2039
Date:	2019
Publisher:	OXFORD UNIV PRESS
Place of Publication:	OXFORD
ISSN:	1460-2431
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language N-TERMINI; RULE PATHWAY; CLEAVAGE SITES; POSITIONAL PROTEOMICS; PROTEOLYTIC EVENTS; GLOBAL ANALYSIS; C-TERMINI; POSTTRANSLATIONAL ARGINYLATION; DEGRADATION SIGNAL; CELL-DEATH Multiple languages Plant Sciences Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/15365