Spatiotemporal Changes of the Phagosomal Proteome in Dendritic Cells in Response to LPS Stimulation*

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Highlights

• •Characterization of the phagosomal proteome comparing resting and LPS-treated BMDCs.
• •Label-free quantification determined 2843 phagosomal proteins.
• •Reduced recruitment of hydrolases and V-ATPase to phagosomes of LPS-treated cells.
• •Increased recruitment of antigen cross-presentation molecules to these phagosomes.

     

Sucrose-induced Receptor Kinase 1 is Modulated by an Interacting Kinase with Short Extracellular Domain,

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Highlights

• •Functional role of a yet uncharacterized receptor kinase QSK1.
• •Activation model for SIRK1 receptor kinase in a heteromer with QSK1.
• •Role of QSK1 in substrate recruitment and stabilization of the complex.

     

Integration of Two In-depth Quantitative Proteomics Approaches Determines the Kallikrein-related Peptidase 7 (KLK7) Degradome in Ovarian Cancer Cell Secretome

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Highlights

• •Kallikrein-related peptidase 7 is over expressed in ovarian cancer.
• •Quantitative PROTOMAP and TAILS approaches identified putative substrates of KLK7.
• •Pro-MMP10 is activated by KLK7.
• •KLK7 cleaves thrombospondin 1 and IGFBP6 in vitro.

     

Glycoproteogenomics: A Frequent Gene Polymorphism Affects the Glycosylation Pattern of the Human Serum Fetuin/α-2-HS-Glycoprotein

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Highlights

• •Frequent genetic polymorphism affects the glycosylation pattern of fetuin.
• •Personalized in-depth proteoform profiling of fetuin purified from 20 donors.
• •Classification of serum donors into three different genotypes.
• •Septic patients show increased level of fucosylation at N-glycolation site N176.

     

Proteomics of Asrij Perturbation in Drosophila Lymph Glands for Identification of New Regulators of Hematopoiesis

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Highlights

• •First report on the quantitative proteomic profiling of Drosophila lymph glands.
• •Comparative proteomic analysis under conditions of perturbed blood cell homeostasis.
• •Resource for identifying new regulators of insect and vertebrate hematopoiesis.

     

The Systemin Signaling Cascade As Derived from Time Course Analyses of the Systemin-responsive Phosphoproteome,

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Highlights

• •Definition of early systemin-responsive phosphorylation time course.
• •Reconstruction of kinase-substrate relationships from phosphorylation time profiles.
• •Phosphatase PLL5 rapidly dephosphorylated H⁺-ATPase LHA1 inducing alkalinization of the medium.
• •MAP-Kinase MPK2 re-phosphorylated LHA1 after 15 minutes.

     

A Combined N-terminomics and Shotgun Proteomics Approach to Investigate the Responses of Human Cells to Rapamycin and Zinc at the Mitochondrial Level

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Highlights

• •Rapamycin and zinc induce moderate but significant mitochondrial proteome changes.
• •The mitochondrial proteins processing system is robust under subtoxic conditions.
• •Rapamycin and zinc perturb the mitochondrial proteins processing system.
• •Rapamycin and zinc perturb the mitochondrial proteins homeostasis.

     

Unraveling Hidden Components of the Chloroplast Envelope Proteome: Opportunities and Limits of Better MS Sensitivity

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Highlights

• •Identification of previously undetected chloroplast envelope proteins.
• •Up to date manual annotation of genuine (or shared) envelope components.
• •New hypotheses for localizations, functions, interactions among cell compartments.
• •A new resource of significant value to the broader plant science community.

     

Apolipoprotein A1 Forms 5/5 and 5/4 Antiparallel Dimers in Human High-density Lipoprotein

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Highlights

• •Zero-length chemical cross-linking of APOA1 peptides in HDL.
• •Cross-links match antiparallel isomers of APOA dimers in molecular modeling.
• •Identical MS/MS spectra of native and synthetic cross-linked peptides.
• •First biochemical evidence of LL5/5 and LL5/4 isomers in human HDL.

     

Chasing Tails: Cathepsin-L Improves Structural Analysis of Histones by HX-MS,

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Highlights

• •Cathepsin-L is introduced as a novel protease for HX-MS studies.
• •Cathepsin-L improves resolution of traditionally challenging histone tails.
• •Cathepsin-L can be readily combined with pepsin for improved protein coverage.
• •In-solution dynamics of the H3.1 and H4 monomers reveal extensive EX1 kinetics.

     

Comprehensive Analysis of Individual Variation in the Urinary Proteome Revealed Significant Gender Differences

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Highlights

• •Comprehensive analysis of inter-individual variation of normal urinary proteome.
• •Significant gender differences were observed.
• •Proteins increased in female urine are enriched in immunological pathways.
• •Estimated reference intervals of proteins as the baseline for biomarker discovery.

     

Phytoplasma-induced Changes in the Acetylome and Succinylome of Paulownia tomentosa Provide Evidence for Involvement of Acetylated Proteins in Witches' Broom Disease

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Highlights

• •Quantitative global proteome, acetylome and succinylome of phytoplasma-infected Paulownia tomentosa seedlings.
• •Acetylation may be more important than succinylation in response to phytoplasma infection.
• •Acetylation modified the activities of POR and RuBisCO.
• •Possible model to elucidate the molecular mechanism responses to PaWB from proteome and PTMs.

     

Complexome Profiling Reveals Association of PPR Proteins with Ribosomes in the Mitochondria of Plants

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Highlights

• •Plant mitoribosomes contain several pentatricopeptide repeat proteins.
• •The small mitoribosomal subunit is of an exceptionally large size.
• •Protein units not directly related to translation may be attached to plant mitoribosomes to confer additional functions to these molecular machines.

     

Reductive Stress Selectively Disrupts Collagen Homeostasis and Modifies Growth Factor-independent Signaling Through the MAPK/Akt Pathway in Human Dermal Fibroblasts

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Highlights

• •Changes to the proteome of skin fibroblasts subjected to reductive stress have been quantitated.
• •Only a small set of proteins is selectively diminished upon exposure to reductants.
• •Collagens (COL1A2 and COL6A2) emerge as sentinels of reductive stress.
• •Reductive stress triggers receptor-independent Akt phosphorylation at Ser473.

     

Regulated Phosphosignaling Associated with Breast Cancer Subtypes and Druggability,

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Highlights

• •Our search identifies 2,134 kinase-substrate phosphosite pairs in breast cancer.
• •CDKs and MAPKs are dominant regulators of trans substrate-phosphorylation.
• •Druggability, outcomes, and immune signatures related to kinase-substrates.
• •Experimentally validated activated phosphosites of ERBB2, EIF4EBP1, and EGFR.

     

In-depth Proteome of the Hypopharyngeal Glands of Honeybee Workers Reveals Highly Activated Protein and Energy Metabolism in Priming the Secretion of Royal Jelly

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Highlights

• •In-depth proteome underpins the gland ontogeny and age-specific activity of the HGs.
• •The well-developed acini in the HGs of NBs promote the RJ secretary activities.
• •The enhanced protein and energy metabolism in the HGs boost the stronger RJ secretion of RJBs.

     

Intact Transition Epitope Mapping – Targeted High-Energy Rupture of Extracted Epitopes (ITEM-THREE),

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Highlights

• •Multiplex epitope mapping/antigenic determinant identification in the gas phase.
• •Intact transition and controlled dissociation of immune complexes by MS.
• •Simultaneous identification and amino acid sequence determination of epitopes.
• •Simplified in-solution sample handling because of ion manipulation and filtering by MS.