The NCBI CDD (Conserved Domain Database) is a database that contains conserved domains in proteins, which are regions of a protein that are likely to be functionally or structurally important. These domains are found in many different species and are often involved in important biological processes.
What is the NCBI CDD?
- Conserved Domain Database (CDD) is part of the NCBI (National Center for Biotechnology Information).
- It is a protein domain database that helps researchers identify and classify protein domains.
- It is used to find conserved domains in proteins, which can help in understanding the function, evolution, and structure of proteins.
Key Features of the NCBI CDD:
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Conserved Domains:
- A conserved domain is a region of a protein that has been preserved across different species.
- These domains are often involved in functional or structural roles.
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Domain Classification:
- The CDD classifies domains into categories based on their structure and function.
- It includes domains like transcription factors, enzymes, receptors, structural proteins, etc.
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Search Functionality:
- You can search for conserved domains using a protein sequence or a domain name.
- The search results will show the domain name, sequence, description, and alignment with other domains.
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Tools and Resources:
- CDD Web Interface: A user-friendly web interface for searching and viewing conserved domains.
- CDD API: An API for programmatic access to the CDD database.
- CDD Search Tool: A tool to search for conserved domains in a given protein sequence.
How to Use the NCBI CDD:
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Visit the NCBI CDD page:
- Go to https://www.ncbi.nlm.nih.gov/cdd/.
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Search for a Domain:
- Enter a protein sequence or a domain name in the search box.
- You can also search by domain name or gene name.
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View Results:
- The results will show the conserved domain name, sequence, description, and alignment with other domains.
- You can also view domain structure and alignment using the CDD viewer.
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Download or Export Results:
- You can download the results as a CSV or TSV file for further analysis.
Example of a Conserved Domain:
- Domain Name:
TUBULIN - Function: Structural protein, involved in cell structure and cytoskeleton
- Conserved in: Many eukaryotic organisms
Use Cases:
- Protein Function Prediction: Identify conserved domains to infer function.
- Evolutionary Analysis: Study conservation across species.
- Drug Discovery: Identify potential targets for drug development.
- Genome Annotation: Help in annotating genes and proteins in new genomes.
Tips:
- Use the CDD search tool for quick results.
- Use domain names instead of sequences for faster searches.
- Check the CDD viewer for detailed domain structures.
If you have a specific protein sequence or domain name in mind, I can help you search for it in the NCBI CDD. Let me know!