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README.md
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- biology
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- protein
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# Contrastively Learned Attention based Stratified PTM Predictor (CLASPP) a unified PTM prediction model
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<!-- Provide a quick summary of what the model is/does. -->
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CLASPP is a ESM2-150m protein lanuguage model that can predict PTM envents occuring on the substrate based
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off primary protein sequence. This is done on multiple differnt PTM types (12) as a form of multi-label
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classifcation. The encoder is training on a supervised Contrastive learing task then the classifcation
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head is finetunted on the multi-label classifcation.
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increasing the functional diversity of the proteome. Despite the identification of hundreds of unique PTMs
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through mass-spectrometry (MS) studies, accurately predicting many PTM types based on sequence data alone
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remains a significant challenge.
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Existing PTM prediction models predominantly focus on either single PTM types or employ ensemble methods
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that combine multiple models to predict different PTM types. This fragmentation is largely driven by the
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vast imbalance in data availability across PTM types making it difficult to predict multiple PTM types
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with a single model. To address this limitation, we present the Contrastively Learned Attention-Based
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Stratified PTM Predictor (CLASPP), a unified PTM prediction model.
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<p align="center">
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</p>
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Installing torch can be the most complex part
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## Model Details
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<p align="center">
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<img width="100%" src= "figures/Screenshot%20from%202025-07-11%2014-19-21.png">
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</p>
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| PTM type | Residue trained on | Number of clusters allocated|output indexes|input indexes (training)|
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| -------------------- | ------------- |--------------------------|------------|-------------|
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| ST_Phosphorylation | S,T | 5 | 0 or 1 | 0-4 |
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| Y_Phosphorylation | Y | 1 | 3 | 25 |
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| K_Ubiquitination | K | 20 | 2 | 5-24 |
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| K_Acetylation | K | 10 | 4 | 26-35 |
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| AM_Acetylation | A,M | 1 | 13 or 14 | 49 |
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| N_N-linked-Glycosylation | N | 1 | 5 | 36 |
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| ST_O-linked-Glycosylation | S,T | 5 | 6 or 7 | 37-41 |
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| RK_Methylation | RK | 4 | 8 or 9 | 42-45 |
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| K_Sumoylation | K | 1 | 10 | 46 |
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| K_Malonylation | K | 1 | 11 | 53 |
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| M_Sulfoxidation | M | 1 | 12 | 48 |
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| C_Glutathionylation | C | 1 | 15 | 50 |
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| C_S-palmitoylation | C | 1 | 16 | 51 |
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| PK_Hydroxylation | P,K | 1 | 17 or 18 | 52 |
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|negitve| all res | N/A | 19 | 53|
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### Model Sources [optional]
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| Repo | Link | Discription|
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| ------------- | ------------- |------------------------------------------|
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| GitHub | [github version Data_cur](https://github.com/gravelCompBio/Claspp_data_cur/tree/main) | This verstion contains code but but no data. It needs you to run the code to generate all the helper-files (will take some time run this code)|
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| Zenodo | [zenodo version Data_cur](https://github.com/gravelCompBio/Claspp_data_cur/tree/main) | This version contains code and helper files already genrated. mostly for proof of concept and seeing the all the data intermeidate states |
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| GitHub | [github version Forward](https://github.com/gravelCompBio/Claspp_data_cur/tree/main) | This verstion contains code but NOT any weights (file too big for github)|
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| Huggingface | [huggingface version Forward](https://huggingface.co/gravelcompbio/Claspp) | This verstion contains code and training weights |
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| Zenodo | [zenodo version training_data](https://github.com/gravelCompBio/Claspp_data_cur/tree/main) | zenodo version of training/testing/validation data|
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| webtool | [website version of webtool](https://github.com/gravelCompBio/Claspp_data_cur/tree/main) | webtool hosted on a server|
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- **Repository:** [More Information Needed]
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- **Paper [optional]:** [More Information Needed]
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- **Demo [optional]:** [More Information Needed]
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## How to Get Started with the Model
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### Downloading this repository
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make sure [git lfs](https://git-lfs.com/) is installed
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```
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git clone https://huggingface.co/esbglab/Claspp_forward
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```
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## Uses
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<!-- Address questions around how the model is intended to be used, including the foreseeable users of the model and those affected by the model. -->
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- **Developed by:** Major author for most code Nathan Gravel. Finetuning code inspried by Zhongliang Zhou,
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- Contrastive learing code inspried by Ruili Fang, Codebase testing and verstion controle by Austin Downes,
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- Webtool dev Saber Soleymani
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- biology
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- protein
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---
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# Contrastively Learned Attention based Stratified PTM Predictor (CLASPP) a unified PTM prediction model
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<p align="center">
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</p>
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CLASPP is a ESM2-150m protein lanuguage model that can pred PTM envents occuring on the substrate based
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+
off primary protein sequence. This is done on multiple differnt PTM types (12) as a form of multi-label
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+
classifcation. The encoder is training on a supervised Contrastive learing task then the classifcation
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+
head is finetunted on the multi-label classifcation. Existing PTM prediction models predominantly focus
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on either single PTM types or employ ensemble methods that combine multiple models to predict different
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PTM types. This fragmentation is largely driven by the vast imbalance in data availability across PTM
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types making it difficult to predict multiple PTM types with a single model. To address this
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limitation, we present the Contrastively Learned Attention-Based Stratified PTM Predictor (CLASPP),
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a unified PTM prediction model.
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Installing torch can be the most complex part
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# How to Get Started with the Model
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### Downloading this repository
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make sure [git lfs](https://git-lfs.com/) is installed
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Can not store weight files here (too big)
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```
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git clone https://huggingface.co/esbglab/Claspp_forward
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```
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## Model Details
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<p align="center">
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<img width="100%" src= "https://huggingface.co/esbglab/Claspp_forward/blob/main/figures/Screenshot%20from%202025-08-05%2011-49-49.png">
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</p>
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| PTM type | Residue trained on | Number of clusters allocated|output indexes|input label indexes (training)|
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| -------------------- | ------------- |--------------------------|------------|-------------|
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| ST_Phosphorylation | S,T | 5 | 0 or 1 | 0-4 |
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| Y_Phosphorylation | Y | 1 | 3 | 25 |
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| K_Ubiquitination | K | 20 | 2 | 5-24 |
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| K_Acetylation | K | 10 | 4 | 26-35 |
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| AM_Acetylation | A,M | 1 | 13 or 14 | 49 |
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| N_N-linked-Glycosylation | N | 1 | 5 | 36 |
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| ST_O-linked-Glycosylation | S,T | 5 | 6 or 7 | 37-41 |
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| RK_Methylation | RK | 4 | 8 or 9 | 42-45 |
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| K_Sumoylation | K | 1 | 10 | 46 |
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| K_Malonylation | K | 1 | 11 | 53 |
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| M_Sulfoxidation | M | 1 | 12 | 48 |
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| C_Glutathionylation | C | 1 | 15 | 50 |
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| C_S-palmitoylation | C | 1 | 16 | 51 |
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| PK_Hydroxylation | P,K | 1 | 17 or 18 | 52 |
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|negitve| all res | N/A | 19 | 53|
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## Data organization and number of clusters
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<p align="center">
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<img width="100%" src= "https://huggingface.co/esbglab/Claspp_forward/blob/main/figures/Screenshot%20from%202025-08-05%2011-48-48.png">
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</p>
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| Repo | Link | Discription|
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| ------------- | ------------- |------------------------------------------|
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| GitHub | [github version Data_cur](https://github.com/gravelCompBio/Claspp_data_cur/tree/main) | This verstion contains code but but no data. It needs you to run the code to generate all the helper-files (will take some time run this code)|
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| Zenodo | [zenodo version Data_cur](https://github.com/gravelCompBio/Claspp_data_cur/tree/main) | This version contains code and helper files already genrated. mostly for proof of concept and seeing the all the data intermeidate states |
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| GitHub | [github version Forward](https://github.com/gravelCompBio/Claspp_data_cur/tree/main) | This verstion contains code but NOT any weights (file too big for github)|
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| Huggingface | [huggingface version Forward](https://huggingface.co/gravelcompbio/Claspp) | This verstion contains code and training weights |
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| Zenodo | [zenodo version training_data](https://github.com/gravelCompBio/Claspp_data_cur/tree/main) | zenodo version of training/testing/validation data|
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| webtool | [website version of webtool](https://github.com/gravelCompBio/Claspp_data_cur/tree/main) | webtool hosted on a server|
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- **Repository:** [More Information Needed]
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- **Paper [optional]:** [More Information Needed]
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- **Demo [optional]:** [More Information Needed]
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## Uses
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<!-- Address questions around how the model is intended to be used, including the foreseeable users of the model and those affected by the model. -->
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- **Developed by:** Major author for most code Nathan Gravel. Finetuning code inspried by Zhongliang Zhou,
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- Contrastive learing code inspried by Ruili Fang, Codebase testing and verstion controle by Austin Downes,
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- Webtool dev Saber Soleymani
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