Processing of a plant peptide hormone precursor facilitated by posttranslational tyrosine sulfation.
Proc Natl Acad Sci U S A
; 119(16): e2201195119, 2022 04 19.
Article
em En
| MEDLINE
| ID: mdl-35412898
ABSTRACT
Most peptide hormones and growth factors are matured from larger inactive precursor proteins by proteolytic processing and further posttranslational modification. Whether or how posttranslational modifications contribute to peptide bioactivity is still largely unknown. We address this question here for TWS1 (Twisted Seed 1), a peptide regulator of embryonic cuticle formation in Arabidopsis thaliana. Using synthetic peptides encompassing the N- and C-terminal processing sites and the recombinant TWS1 precursor as substrates, we show that the precursor is cleaved by the subtilase SBT1.8 at both the N and the C termini of TWS1. Recognition and correct processing at the N-terminal site depended on sulfation of an adjacent tyrosine residue. Arginine 302 of SBT1.8 was found to be required for sulfotyrosine binding and for accurate processing of the TWS1 precursor. The data reveal a critical role for posttranslational modification, here tyrosine sulfation of a plant peptide hormone precursor, in mediating processing specificity and peptide maturation.
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Base de dados:
MEDLINE
Assunto principal:
Processamento de Proteína Pós-Traducional
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Arabidopsis
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Proteínas de Arabidopsis
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Hormônios Peptídicos
Idioma:
En
Ano de publicação:
2022
Tipo de documento:
Article