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Crotonylation Proteomics Analysis Service

As a post-translational modification of proteins, crotonylation plays an important role in chromatin remodeling, cell metabolism, cell cycle, and cellular reorganization. Histone crotonylation is a newly identified covalent epigenetic modification, which is a dynamic process analogous to histone acetylation regulated by histone crotonyl transferases (HCTs) and histone decrotonylases (HDCRs). Meanwhile, lysine crotonylation has been proved to have the function of promoting gene expression. After introducing the negatively charged crotonyl groups, positive charges of histones were neutralized and bound more loosely to negatively charged DNA. Therefore, this overall process ameliorates the binding of transcription factors. Nevertheless, histone crotonylation modifications have been shown to maintain the activity of sex chromosome-associated genes in mid-meiotic divisions.

Although initially identified on histones, lysine crotonylation has expanded to a great number of non‐histone proteins. In order to characterize the global crotonylation proteome, proteomic solutions based on sensitive immune‐affinity purification and high‐resolution liquid chromatography‐tandem (LC‐MS/MS) were applied to identify new crotonylated proteins and modification sites. In addition, the utilization of antibodies with high specificity targeting crotonylated peptides involved in immunoprecipitation significantly advanced the enrichment and identification of crotonylated lysine residues^[1].

Our Crotonylation Proteomics Service

Based on our advanced mass spectrometry instrumentations and extensive knowledge in biochemical, Creative Proteomics has launched a crotonylation proteomics service package, which identifies crotonylated proteins and corresponding crotonylation sites for complex samples such as tissues and cells.

Histone crotonylation sites in human

Fig. 1 Human histone crotonylation sites^[1]

Workflow

Customized Bioinformatics Services

Standard Analysis	Customized Analysis
a) Collection of output statistics b) Establishment of database and search for modified proteins c) Identification of modified proteins and modification sites d) Annotation of modified proteins e) Quantitative analysis of modified proteins f) Analysis of differential expression of modified proteins g) Functional enrichment analysis of differentially modified proteins GO/KEGG	Modified peptide motif analysis Protein network interaction prediction Protein domain prediction (Advanced Analysis) Protein subcellular localization analysis (Advanced Analysis)

Sample requirements

Fresh animal tissue: ≥600 mg
Fresh plant tissue: ≥6 g
Cell culture: ≥1×10⁷ cells/tube x 3 tubes
Fungi and bacteria: ≥600 mg
Serum, plasma: 450 μl × 4 tubes
Protein solution: total protein of 5-10 mg
Body fluid samples: urine of 15 mL × 4 tubes (centrifuge at 1000 x g for 5 minutes and discard sediment); or other body fluids (saliva, amniotic fluid, cell culture supernatant, etc.) > 15 mL

Advantages

- High specificity and enrichment efficiency by using a chemically stable crotonylated resin IP
- Large-scale identification of enriched crotonylated peptides with mass spectrometry of high resolution and high throughput
- Combining commercially available quantitative techniques to analyze, compare, and correlate crotonylation levels between samples quantitatively

Applications

Drug target research
Disease biomarker screening
Plant stress/resistance research
Mechanism of action studies

Technology platforms

Ion Chromatography
High-Performance Liquid Chromatography (HPLC)
Matrix-Assisted Laser Desorption Ionization Mass Spectrometry (MALDI-MS)

References

Junhu Wan, Hongyang Liu, Jie Chu, Hongquan Zhang. Functions and mechanisms of lysine crotonylation. J Cell Mol Med. 2019 Nov; 23(11): 7163–7169.
Gaoyue Jiang, Chunxia Li, Meng Lu, Kefeng Lu & Huihui Li Protein lysine crotonylation: past, present, perspective. Cell Death & Disease 12, 703 (2021).
Shuo Wang1, Guanqun Mu1, Bingquan Qiu1, Meng Wang1, Zunbo Yu2, Weibin Wang3, Jiadong Wang3, Yang Yang. The Function and related Diseases of Protein Crotonylation. Int J Biol Sci 2021; 17(13):3441-3455.

Proteomics Sample Submission Guidelines

Ensure your samples are prepared and submitted correctly by downloading our comprehensive Proteomics Sample Submission Guidelines. This document provides detailed instructions and essential information to facilitate a smooth submission process. Click the link below to access the PDF and ensure your submission meets all necessary criteria.

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* For Research Use Only. Not for use in diagnostic procedures.

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From Our Clients

"I recently used their proteomics service for a project analyzing protein interactions in yeast models. The team was very responsive and helped clarify the methodology they employed, which made me feel confident in the results. The data quality was solid, with clear identification of several key proteins involved in our study. Their thorough analysis enabled me to pinpoint specific interactions that I hadn't considered before, which significantly improved the direction of my research. I appreciate their professionalism and support throughout the process."

Sarah Thompson, University of California, Berkeley

"Our lab collaborated with them on a project studying cancer biomarkers. The proteomics analysis provided was detailed and focused, specifically highlighting the differential expression of proteins between healthy and tumor samples. Their clear explanations of the data helped my team understand the biological implications. I also appreciated their willingness to revise the reports based on our feedback, ensuring that we had everything we needed for our publication. This collaborative spirit was invaluable."

Emily Rodriguez, Stanford University

"Our lab worked with them on a project studying the effects of diet on gut microbiota using proteomics. They used a label-free quantification method to analyze proteins in fecal samples before and after dietary intervention. The results showed significant changes in protein expression linked to microbial activity. This was pivotal for our hypothesis about diet-microbiota interactions. The clarity of their data presentation made it easy for our team to integrate these findings into our ongoing research."

Dr. Lisa Wong, University of Toronto

"My experience with Creative Proteomics during the mass spectrometry analysis was excellent. We sent in human saliva and mouse brain tissue samples, which they expertly analyzed using both LC-MS and GC-MS techniques. The results were invaluable, revealing key metabolites in the saliva and identifying biomarkers linked to brain function in the brain tissue."

Dr. Emily Carter, Senior Research Scientist

"The overall service from Creative Proteomics was outstanding. They made the entire process seamless and efficient, allowing us to focus on our research. We worked with leaf and root samples from various Arabidopsis genotypes for targeted metabolomics analysis. Their thorough profiling of primary and secondary metabolites gave us important insights into how the plants respond metabolically to environmental stress."

Dr. Laura Henderson, Plant Physiologist

"We had a pleasant collaboration with Creative Proteomics on mass spectrometry analysis of lipids. They conducted a detailed analysis of lipid species, providing us with important insights into lipid metabolism and its relationship with metabolic syndrome disease states."

Dr. Sarah Mitchell, Research Scientist

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