Proteomics Shared Resource Submission Guidelines
The Proteomics Shared Resource (PSR) serves as a critical infrastructure for researchers requiring high-end mass spectrometry analysis. To maintain the efficiency of the core facility and ensure the accuracy of experimental results, all investigators are required to complete a formal submission form prior to sending their samples. This documentation process is essential for logistical planning, instrument selection, and data interpretation.
Why the Submission Form is Necessary
A standardized submission form acts as a bridge between the research laboratory and the technical staff at the facility. It serves several key purposes:
- Sample Tracking: Provides a unique identifier for every sample set, ensuring traceability from reception to final data reporting.
- Risk Assessment: Alerts facility staff to potentially hazardous materials, such as infectious agents or radioactive samples, which require specific biosafety handling.
- Methodological Optimization: Helps staff choose the correct chromatography methods, enzymatic digestion protocols, and mass spectrometry parameters based on the expected protein concentration and buffer composition.
- Grant Compliance: Often required for auditing purposes to justify the usage of core facility funding and to maintain an accurate record of institutional collaborative work.
Key Information Required for Submission
When preparing to submit samples, researchers should be prepared to provide detailed information. Common fields included in the submission form are:
1. Investigator and Contact Details
Name, department, and principal investigator (PI) contact info. This ensures that the facility can reach the primary person responsible for the project and the budgetary approver.
2. Sample Characteristics
A description of the sample matrix (e.g., cell lysate, tissue homogenate, immunoprecipitation eluate). Information on protein concentration and volume is mandatory to prevent instrument overloading.
3. Experimental Objectives
Is the study looking for simple protein identification, quantitative profiling (e.g., TMT or Label-Free Quantification), or post-translational modification analysis (e.g., phosphorylation or acetylation)? Providing the experimental goal helps staff calibrate the sensitivity requirements.
4. Buffer and Chemical Compatibility
Many chemicals used in biological buffers are incompatible with mass spectrometry (e.g., high concentrations of SDS, detergents like Triton X-100, or salts). Disclosure of buffer composition is critical to avoid damaging instrument components.
Best Practices for Sample Preparation
The quality of your data is directly proportional to the quality of your submitted samples. Researchers should adhere to the following guidelines:
- Cleanliness: Avoid contamination from keratin (skin/hair) by wearing gloves and using clean glassware.
- Storage: Ensure samples are labeled clearly with a waterproof marker and frozen at the appropriate temperature (typically -80C) before transport.
- Documentation: Include a digital or printed copy of the submission form with the physical samples. Do not ship samples without prior notification to the core facility manager.
The Submission Workflow
The typical workflow begins with a consultation. If a researcher is unsure about which mass spectrometry service best suits their project, they should contact the facility to discuss experimental design. Once the design is finalized, the researcher logs into the submission portal to generate a submission ID. The samples are then prepared according to the facility's guidelines, verified against the form, and dropped off. Once the analysis is completed, the researcher is notified via email, and the data is transferred through a secure institutional server.
Common Pitfalls to Avoid
Incomplete forms are the primary cause of project delays. Ensure that the estimated protein concentration is accurate; if you are unsure, request a pre-submission protein quantification service if the facility provides it. Furthermore, failing to list potential contaminantssuch as polymers or non-volatile saltscan lead to significant data loss or instrumentation downtime. Always prioritize transparency in your submission, as it allows the facility scientists to provide the best possible support for your research project.
