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Title: The Importance of Protein Phosphorylation for Signaling and Metabolism in Response to Diel Light Cycling and Nutrient Availability in a Marine Diatom

Abstract

Diatoms are major contributors to global primary production and their populations in the modern oceans are affected by availability of iron, nitrogen, phosphate, silica, and other trace metals, vitamins, and infochemicals. However, little is known about the role of phosphorylation in diatoms and its role in regulation and signaling. We report a total of 2759 phosphorylation sites on 1502 proteins detected in Phaeodactylum tricornutum. Conditionally phosphorylated peptides were detected at low iron (n = 108), during the diel cycle (n = 149), and due to nitrogen availability (n = 137). Through a multi-omic comparison of transcript, protein, phosphorylation, and protein homology, we identify numerous proteins and key cellular processes that are likely under control of phospho-regulation. We show that phosphorylation regulates: (1) carbon retrenchment and reallocation during growth under low iron, (2) carbon flux towards lipid biosynthesis after the lights turn on, (3) coordination of transcription and translation over the diel cycle and (4) in response to nitrogen depletion. We also uncover phosphorylation sites for proteins that play major roles in diatom Fe sensing and utilization, including flavodoxin and phytotransferrin (ISIP2A), as well as identify phospho-regulated stress proteins and kinases. These findings provide much needed insight into the roles ofmore » protein phosphorylation in diel cycling and nutrient sensing in diatoms.« less

Authors:
ORCiD logo [1]; ORCiD logo [2];  [3]; ORCiD logo [4];  [2];  [5]; ORCiD logo [6]
  1. Univ. of California, San Diego, CA (United States). Scripps Inst. of Oceanography
  2. J. Craig Venter Inst., Inc., La Jolla, CA (United States). Microbial and Environmental Genomics
  3. Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab.
  4. Univ. of California, San Diego, CA (United States). Dept. of Bioengineering
  5. Rutgers Univ., New Brunswick, NJ (United States). Dept. of Earth and Environmental Sciences
  6. Univ. of California, San Diego, CA (United States). Scripps Inst. of Oceanography; J. Craig Venter Inst., Inc., La Jolla, CA (United States). Microbial and Environmental Genomics
Publication Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER); National Science Foundation (NSF); Gordon and Betty Moore Foundation
OSTI Identifier:
1673586
Report Number(s):
PNNL-SA-153917
Journal ID: ISSN 2079-7737
Grant/Contract Number:  
AC05-76RL01830; SC0006719; SC0008593; MCB-1024913; MCB-1818390; OCE-0727997; OCE-1756884; GBMF3828
Resource Type:
Accepted Manuscript
Journal Name:
Biology
Additional Journal Information:
Journal Volume: 9; Journal Issue: 7; Journal ID: ISSN 2079-7737
Publisher:
MDPI
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; phosphoproteome; nitrogen stress; iron; diel; diatom; signaling

Citation Formats

Tan, Maxine H., Smith, Sarah R., Hixson, Kim K., Tan, Justin, McCarthy, James K., Kustka, Adam B., and Allen, Andrew E. The Importance of Protein Phosphorylation for Signaling and Metabolism in Response to Diel Light Cycling and Nutrient Availability in a Marine Diatom. United States: N. p., 2020. Web. doi:10.3390/biology9070155.
Tan, Maxine H., Smith, Sarah R., Hixson, Kim K., Tan, Justin, McCarthy, James K., Kustka, Adam B., & Allen, Andrew E. The Importance of Protein Phosphorylation for Signaling and Metabolism in Response to Diel Light Cycling and Nutrient Availability in a Marine Diatom. United States. https://doi.org/10.3390/biology9070155
Tan, Maxine H., Smith, Sarah R., Hixson, Kim K., Tan, Justin, McCarthy, James K., Kustka, Adam B., and Allen, Andrew E. Mon . "The Importance of Protein Phosphorylation for Signaling and Metabolism in Response to Diel Light Cycling and Nutrient Availability in a Marine Diatom". United States. https://doi.org/10.3390/biology9070155. https://www.osti.gov/servlets/purl/1673586.
@article{osti_1673586,
title = {The Importance of Protein Phosphorylation for Signaling and Metabolism in Response to Diel Light Cycling and Nutrient Availability in a Marine Diatom},
author = {Tan, Maxine H. and Smith, Sarah R. and Hixson, Kim K. and Tan, Justin and McCarthy, James K. and Kustka, Adam B. and Allen, Andrew E.},
abstractNote = {Diatoms are major contributors to global primary production and their populations in the modern oceans are affected by availability of iron, nitrogen, phosphate, silica, and other trace metals, vitamins, and infochemicals. However, little is known about the role of phosphorylation in diatoms and its role in regulation and signaling. We report a total of 2759 phosphorylation sites on 1502 proteins detected in Phaeodactylum tricornutum. Conditionally phosphorylated peptides were detected at low iron (n = 108), during the diel cycle (n = 149), and due to nitrogen availability (n = 137). Through a multi-omic comparison of transcript, protein, phosphorylation, and protein homology, we identify numerous proteins and key cellular processes that are likely under control of phospho-regulation. We show that phosphorylation regulates: (1) carbon retrenchment and reallocation during growth under low iron, (2) carbon flux towards lipid biosynthesis after the lights turn on, (3) coordination of transcription and translation over the diel cycle and (4) in response to nitrogen depletion. We also uncover phosphorylation sites for proteins that play major roles in diatom Fe sensing and utilization, including flavodoxin and phytotransferrin (ISIP2A), as well as identify phospho-regulated stress proteins and kinases. These findings provide much needed insight into the roles of protein phosphorylation in diel cycling and nutrient sensing in diatoms.},
doi = {10.3390/biology9070155},
journal = {Biology},
number = 7,
volume = 9,
place = {United States},
year = {Mon Jul 06 00:00:00 EDT 2020},
month = {Mon Jul 06 00:00:00 EDT 2020}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Figures / Tables:

Figure 1 Figure 1: Summary of the phosphoproteome of P. tricornutum. (a) Proportions of detected phosphoproteins in each KOG class (* indicate significantly enriched groups, ˆ indicate significantly depleted groups). Proteins related to signal transduction mechanisms and RNA processing/modification were significantly enriched for phosphorylation. (b) The majority of phosphoproteins (76%) had onemore » or two phosphorylation sites. Highly phosphorylated phosphoproteins (>5 p-sites) was 5.6% of the total phosphoproteins. (c) This study detected 2759 p-sites on 1502 proteins, most of which were not previously detected by Chen et al. in P. tricornutum. (d) PCA shows that phosphorylation in P. tricornutum is affected by nutrient availability and culturing environment. (e) Unique phosphopeptides detected during low ($n$ = 76), medium ($n$ = 50) and high ($n$ = 101) Fe treatments or in Nshort experiments ($n$ = 712) are likely candidates controlling cellular response and environmental sensing. Constitutively phosphorylated phosphoproteins ($n$ = 80) are likely required for core cellular functions.« less

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Proteome response of Phaeodactylum tricornutum , during lipid accumulation induced by nitrogen depletion
journal, September 2016


The Inositol Hexakisphosphate Kinase Family: CATALYTIC FLEXIBILITY AND FUNCTION IN YEAST VACUOLE BIOGENESIS
journal, May 2000

  • Saiardi, Adolfo; Caffrey, James J.; Snyder, Solomon H.
  • Journal of Biological Chemistry, Vol. 275, Issue 32
  • DOI: 10.1074/jbc.M002750200

A probability-based approach for high-throughput protein phosphorylation analysis and site localization
journal, September 2006

  • Beausoleil, Sean A.; Villén, Judit; Gerber, Scott A.
  • Nature Biotechnology, Vol. 24, Issue 10
  • DOI: 10.1038/nbt1240

Prospects in diatom research
journal, April 2005


Transcriptional Orchestration of the Global Cellular Response of a Model Pennate Diatom to Diel Light Cycling under Iron Limitation
journal, December 2016


MS-GF+ makes progress towards a universal database search tool for proteomics
journal, October 2014

  • Kim, Sangtae; Pevzner, Pavel A.
  • Nature Communications, Vol. 5, Issue 1
  • DOI: 10.1038/ncomms6277

Iron and macronutrients in California coastal upwelling regimes: Implications for diatom blooms
journal, November 2001

  • Bruland, Kenneth W.; Rue, Eden L.; Smith, Geoffrey J.
  • Limnology and Oceanography, Vol. 46, Issue 7
  • DOI: 10.4319/lo.2001.46.7.1661

Proteomic analyses bring new insights into the effect of a dark stress on lipid biosynthesis in Phaeodactylum tricornutum
journal, May 2016

  • Bai, Xiaocui; Song, Hao; Lavoie, Michel
  • Scientific Reports, Vol. 6, Issue 1
  • DOI: 10.1038/srep25494

The Global Phosphoproteome of Chlamydomonas reinhardtii Reveals Complex Organellar Phosphorylation in the Flagella and Thylakoid Membrane
journal, June 2014

  • Wang, Hongxia; Gau, Brian; Slade, William O.
  • Molecular & Cellular Proteomics, Vol. 13, Issue 9
  • DOI: 10.1074/mcp.M114.038281

Bromodomain factor 1 corresponds to a missing piece of yeast TFIID
journal, April 2000

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  • Genes & Development, Vol. 14, Issue 8
  • DOI: 10.1101/gad.14.8.951

Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.