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README.md
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- f1
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base_model:
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- facebook/esm1b_t33_650M_UR50S
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- f1
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base_model:
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- facebook/esm1b_t33_650M_UR50S
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---
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## **Fine-Tuning ESM-1b for Phosphosite Prediction**
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This repository provides a fine-tuned version of the [ESM-1b]([https://website-name.com](https://huggingface.co/facebook/esm1b_t33_650M_UR50S)) model, trained to classify phosphosites using unlabeled phosphosites(ie, which kinases phosphorylate those phosphosites is unknown) from [PhosphoSitePlus](https://www.phosphosite.org/staticDownloads). The model is designed for binary classification, distinguishing phosphosites from non-phosphorylated peptid sequences [(Musite, a Tool for Global Prediction of General and Kinase-specific Phosphorylation Sites)](https://www.sciencedirect.com/science/article/pii/S1535947620311518)
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### **Dataset & Labeling Strategy**
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The dataset was constructed using phosphosite information from **PhosphoSitePlus**, with the following assumptions:
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- Positive Samples: Known phosphorylated residues from PhosphoSitePlus.
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- Negative Samples: Derived by selecting 15-residue sequences from the same proteins, ensuring the central residue matches a known phosphorylation site but is not reported as phosphorylated in PhosphoSitePlus.
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**Note**: The absence of phosphorylation reports does not imply absolute non-phosphorylation but is assumed as negative in this study.
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### **Dataset Statistics**
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- Positive Samples: 366,028
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- Negative Samples: 364,121
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- Training Samples: 511,104
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- Validation Samples: 109,522
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- Testing Samples: 109,523
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### **Test Performance**
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- Accuracy: 0.94
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- F1-Score: 0.94
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### **Usage**
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```
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from transformers import AutoTokenizer, AutoModelForSequenceClassification
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import torch
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# Load the model and tokenizer
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model_name = "isikz/phosphorylation_binaryclassification_esm1b"
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tokenizer = AutoTokenizer.from_pretrained(model_name)
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model = AutoModelForSequenceClassification.from_pretrained(model_name)
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# Example sequence
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sequence = "MKTLLLTLVVVTIVCLDLGYTGV"
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# Tokenize input
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inputs = tokenizer(sequence, return_tensors="pt")
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# Get prediction
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with torch.no_grad():
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outputs = model(**inputs)
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logits = outputs.logits
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prediction = torch.sigmoid(logits).item()
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print(f"Phosphorylation Probability: {prediction:.4f}")
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```
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