Please use this identifier to cite or link to this item: http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/8213
Title: Peptides from conserved tandem direct repeats of SHORT-LEAF regulate gametophore development in moss P. patens
Authors: PALIT, SHIRSA
BHIDE, AMEY J.
Mohanasundaram, Boominathan
PALA, MADHUSMITA
BANERJEE, ANJAN K.
Dept. of Biology
Keywords: Biology
2023-SEP-WEEK4
TOC-SEP-2023
2024
Issue Date: Jan-2024
Publisher: Oxford University Press
Citation: Plant Physiology, 194(01), 434–455.
Abstract: Tandem direct repeat (TDR)-containing proteins, present across all domains of life, play crucial roles in plant development and defense mechanisms. Previously, we identified that disruption of a bryophyte-specific protein family, SHORT-LEAF (SHLF), possessing the longest reported TDRs, is the cause of the shlf mutant phenotype in Physcomitrium patens. shlf exhibits reduced apical dominance, altered auxin distribution, and two-fold shorter leaves. However, the molecular role of SHLF was unclear due to the absence of known conserved domains. Through a series of protein domain deletion analyses, here, we demonstrate the importance of the signal peptide and the conserved TDRs and report a minimal functional protein (miniSHLF) containing the N-terminal signal peptide and first two TDRs (N-TDR1-2). We also demonstrate that SHLF behaves as a secretory protein and that the TDRs contribute to a pool of secreted peptides essential for SHLF function. Further, we identified that the mutant secretome lacks SHLF peptides, which are abundant in WT and miniSHLF secretomes. Interestingly, shlf mutants supplemented with the secretome or peptidome from WT or miniSHLF showed complete or partial phenotypic recovery. Transcriptomic and metabolomic analyses revealed that shlf displays an elevated stress response, including high ROS activity and differential accumulation of genes and metabolites involved in the phenylpropanoid pathway, which may affect auxin distribution. The TDR-specific synthetic peptide SHLFpep3 (INIINAPLQGFKIA) also rescued the mutant phenotypes, including the altered auxin distribution, in a dosage-dependent manner and restored the mutant's stress levels. Our study shows that secretory SHLF peptides derived from conserved TDRs regulate moss gametophore development.
URI: https://doi.org/10.1093/plphys/kiad515
http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/8213
ISSN: 1532-2548
032-0889
Appears in Collections:JOURNAL ARTICLES

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