Assessing the in vitro Binding Specificity of Histone Modification Reader Proteins Using Histone Peptide Arrays
Bibliographic record
Abstract
In the field of chromatin biology, a major goal of understanding the roles of histone post-translational modifications is to identify the proteins and domains that recognize these modifications. Synthetic histone peptides containing one or more modifications are a key tool to probe these interactions in pull-down assays with recombinant proteins or cell lysates. Building on these approaches, the binding specificity of a protein of interest can be screened against many histone peptides in parallel using a peptide array. In this protocol, we describe the expression and purification of a recombinant protein of interest in bacteria, followed by an assay for binding to histone post-translational modifications using a commercially available histone peptide array. The purification uses a versatile dual-tagging and cleavage strategy and equipment commonly available in a molecular biology laboratory. Graphic abstract: Overview of protocol for purifying recombinant protein and hybridizing to a histone peptide array.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".