Henry Ford remarked that coming together is a beginning, staying together is progress, and working together is success. Working together is also more fun. Thus, from the very beginning, we sought to help colleagues adopt and use single-cell proteomic methodologies that our laboratory developed, and to do so following best practices To develop and disseminate … Continue reading Guidelines for single-cell proteomic experiments
Adsorption losses during single-cell proteomics
Proteins are wonderfully diverse! Their physicochemical diversity is essential to animating life, to performing the myriad functions necessary to process energy, nutrients and information in living systems. The physicochemical diversity of proteins also poses challenges to proteomic analysis. Different amino acid sequences can adsorb to various surfaces, thus resulting in losses, reduced sensitivity and even … Continue reading Adsorption losses during single-cell proteomics
Framework for increasing proteomics throughput
Simultaneously achieving achieving deep proteome coverage, high data completeness, high throughput, and high sensitivity has been a long standing challenge in the field of proteomics. This challenge is particularly evident and relevant to single-cell proteomics, which has the potential to enable mechanistic investigations of key biological questions, such as signaling mechanisms based on protein binding, modifications, and … Continue reading Framework for increasing proteomics throughput
Accessible single-cell proteomics
This aim for a “model T” single-cell proteomics has been our guiding philosophy in the development of methods for single-cell proteomics.
Label-free single-cell proteomics
Recently, Matthias Mann and colleagues published a preprint (doi: 10.1101/2020.12.22.423933v1) reporting a label-free mass-spectrometry method for single-cell proteomics. Many colleagues asked me what I think about the preprint, and I summarized a few comments in the peer review below. I did not examine all aspects of the work, but I hope my comments are useful: … Continue reading Label-free single-cell proteomics
The cost of omics
Next generation DNA sequencing is ubiquitously integrated in modern biomedical research while mass-spectrometry proteomics remains less ubiquitous. In fact, mass-spectrometry proteomics is conspicuously missing from projects that desperately need it. Why is DNA sequencing better integrated with biomedical research? This question comes up often in my conversations with colleagues. A commonly suggested answer is the … Continue reading The cost of omics
When do you need single-cell analysis?
At HUPO, I have been repeatedly asked: "Why analyze single cells when you can identify more peptides in bulk samples?"
Direct causal mechanisms
Understanding biological systems: In search of direct causal mechanisms The advent of DNA-microarrays spurred a vigorous effort to reverse engineer biological networks. Recently, these efforts have been reinvigorated by the availability of RNA-seq data from perturbed and unperturbed single cells. In the talk below, I discuss the opportunities and limitations of using such data for … Continue reading Direct causal mechanisms
The success of imaging technologies The molecular and functional differences among the cells making our bodies have been appreciated for many decades. Yet, the tools to study them were very limited. In the last couple of decades, we have began developing increasingly powerful technologies for molecular single-cell measurements. Currently, the most widely used high-throughput methods … Continue reading Single-cell analysis
Ever since my lab posted the SCoPE-MS preprint, I have been repeatedly asked about the future potential and the cost of quantifying proteins by high-throughput mass-spectrometry in single cells. I will summarize a few thoughts that hopefully will be helpful and will reduce email traffic. Why quantify proteins and PTMs in single cells? Single-cell RNA-seq … Continue reading Single-cell proteomics