Dataset Information

Proteomic analysis of accessory gland in sexually mature Eriocheir sinensis

ABSTRACT: The accessory gland (AG), an important component of the male reproductive system, enhances the fertility of spermatozoa during male reproduction. Some AG proteins are known to bind to the spermatozoa membrane and affect its function and properties. In this study, we describe, for the first time, a comprehensive catalog of proteins of the AG secreted fluid during the mature phase of the Chinese mitten crab (Eriocheir sinensis). AG secreted proteins were separated by one-dimensional gel electrophoresis and analyzed by reverse phase high-performance liquid chromatography coupled with tandem mass spectrometry (HPLC-MS/MS).

INSTRUMENT(S): LTQ Orbitrap Velos

ORGANISM(S): Eriocheir Sinensis (chinese Mitten Crab)

TISSUE(S): Somatic Cell

SUBMITTER: Lin He

LAB HEAD: Qun Wang

PROVIDER: PXD000700 | Pride | 2015-08-07

REPOSITORIES: Pride

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Publications

A Catalog of Proteins Expressed in the AG Secreted Fluid during the Mature Phase of the Chinese Mitten Crabs (Eriocheir sinensis).

He Lin L Li Qing Q Liu Lihua L Wang Yuanli Y Xie Jing J Yang Hongdan H Wang Qun Q

PloS one 20150825 8

The accessory gland (AG) is an important component of the male reproductive system of arthropods, its secretions enhance fertility, some AG proteins bind to the spermatozoa and affect its function and properties. Here we report the first comprehensive catalog of the AG secreted fluid during the mature phase of the Chinese mitten crab (Eriocheir sinensis). AG proteins were separated by one-dimensional gel electrophoresis and analyzed by reverse phase high-performance liquid chromatography coupled ...[more]

PMID: 26305468

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Project description:The rapid emergence of drug resistant Staphylococcus aureus (S. aureus), in particular, methicillin-resistant S. aureus (MRSA) poses a serious threat to public health globally. Reuse of metal-based antimicrobials stands for one of the most promising strategies to resensitize drug resistant bacteria to conventional antibiotics. Silver (Ag) has been used as an antimicrobial agent since antiquity, yet its molecular mechanism of action is elusive largely owing to technical challenges to identify the direct silver-binding protein targets accountable for its action. Herein, using an in-house developed hyphenated technique LC-GE-ICP-MS, we successfully separated and identified 38 authentic Ag+-binding proteins (Ag+-proteome) in S. aureus at the whole-cell scale for the first time. By integration with bioinformatic analysis and systematic biochemical characterizations, we captured the first snapshot on the dynamic action of Ag+ against S. aureus at the molecular level, i.e., Ag+ primarily targets glycolysis via inhibiting multiple enzymes and induces the elevation of ROS through functional disruption of redox homeostasis system at the late stage, leading to an upregulation of oxidative pentose phosphate pathway (oxPPP) to alleviate Ag+ stress. However, the activation of oxPPP is ultimately futile due to key oxPPP enzymes being inhibited by Ag+. We further validated that Ag+ could inhibit 6-phosphogluconate dehydrogenase, a key target from oxPPP through binding to His185 at the active site and morphing the shape of catalytic pocket by X-ray crystallography. Significantly, the multi-target mode of action of silver is accountable for its suppression of antibiotic selection effects towards S. aureus as well as its sustainable antimicrobial activity. Such a unique mode of action of Ag+ (and silver nanoparticles) led to enhanced efficacy of a broad range of antibiotics and resensitization of MRSA to antibiotics. Our study resolves the long-standing question of the molecular targets of silver in S. aureus and offers a novel insight into the sustainable bacterial susceptibility of silver, providing a potential approach for combating antimicrobial resistance.

Dataset Information

Proteomic analysis of accessory gland in sexually mature Eriocheir sinensis

Publications

A Catalog of Proteins Expressed in the AG Secreted Fluid during the Mature Phase of the Chinese Mitten Crabs (Eriocheir sinensis).

Similar Datasets

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