Hailey Johnson
The Protein Data Bank (PDB) is a vital resource for structural biologists, providing access to 3D structures of proteins, nucleic acids, and other biomolecules. Properly citing the PDB is essential for acknowledging the work of researchers who contribute to this database and ensuring academic integrity. When citing the PDB, it is crucial to include the unique PDB ID (e.g., 1CRN), the title of the entry, the authors of the structure determination, the journal reference where the structure was published, and the year of deposition. Additionally, users should follow specific guidelines provided by the PDB or their institution’s citation style (e.g., APA, MLA, or Chicago). Accurate citation not only gives credit to the original researchers but also facilitates reproducibility and transparency in scientific research.
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What You'll Learn
- PDB Format Overview: Understand the structure and content of PDB files for accurate citation
- Accession Codes: Use unique 4-character codes to identify and cite specific protein structures
- Citation Guidelines: Follow official PDB recommendations for proper academic referencing in publications
- Software Tools: Utilize tools like RCSB PDB for generating correct citation formats
- Acknowledging Contributions: Credit authors, depositors, and PDB resources in your work
PDB Format Overview: Understand the structure and content of PDB files for accurate citation
The Protein Data Bank (PDB) format is a critical resource for structural biologists, providing detailed 3D coordinates of biomolecules. Understanding the structure and content of PDB files is essential for accurate citation, ensuring proper credit is given to the researchers and data contributors. A PDB file is a text-based format that contains a wealth of information, including atomic coordinates, connectivity, and metadata about the biomolecular structure. The file is organized into specific record types, each denoted by a unique keyword, which facilitates parsing and analysis. When citing a PDB entry, it is crucial to recognize the format’s hierarchical structure, starting with the primary citation for the entire structure, typically found in the `PRIMARY` or `JRNL` records, which include publication details such as authors, title, and DOI.
The header section of a PDB file, marked by the `HEADER` record, provides essential metadata about the structure, including the PDB ID, deposition date, and a brief description of the molecule. This section is fundamental for citation as it identifies the specific entry being referenced. Following the header, the `TITLE` record offers a concise summary of the structure, which can be useful for context in citations. The `EXPDTA` record indicates the experimental method used to determine the structure (e.g., X-ray crystallography, NMR), which is important for acknowledging the methodology in your citation. Understanding these initial records ensures that your citation accurately reflects the source and nature of the structural data.
The main body of a PDB file contains atomic coordinate data, primarily in the `ATOM` and `HETATM` records. These records list the 3D coordinates of each atom, along with additional information such as atom name, residue type, and occupancy. While these details are not typically included in a citation, they are crucial for understanding the structure’s content and complexity. Researchers should focus on the metadata records for citation purposes, as they provide the necessary information to properly acknowledge the source. The `AUTHOR` record, for instance, lists the contributors to the structure determination, ensuring that individual efforts are recognized in your citation.
Additional metadata in PDB files, such as the `REMARK` records, may contain supplementary information, including experimental conditions, software used, or unresolved issues. While not always required for citation, these details can provide valuable context for your work. The `JRNL` record is particularly important, as it references the peer-reviewed publication associated with the structure, often including a DOI. Citing this publication alongside the PDB ID ensures comprehensive attribution. For example, a proper citation might include the PDB ID, the associated publication’s authors, title, journal, year, and DOI, following standard citation formats like APA or MLA.
Finally, the `DBREF` and `SEQADV` records link the PDB entry to external databases, such as UniProt, providing further context for the biomolecule’s sequence and function. While these records are not directly cited, they highlight the interconnectedness of structural data with other biological resources. When citing a PDB entry, always include the PDB ID (e.g., 1CRN) and the associated publication, ensuring clarity and completeness. Tools like the PDB website’s citation generator can assist in creating accurate citations, but understanding the file’s structure empowers researchers to cite PDB data confidently and correctly. Proper citation not only acknowledges the original work but also fosters transparency and reproducibility in scientific research.
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Accession Codes: Use unique 4-character codes to identify and cite specific protein structures
When citing specific protein structures from the Protein Data Bank (PDB), accession codes are the primary and most reliable method for identification. These codes are unique, 4-character alphanumeric identifiers assigned to each structure deposited in the PDB. For example, the structure of hemoglobin is identified by the accession code 1GZX. Using these codes ensures clarity and precision in referencing, as they directly link to the exact structure in the PDB archive. This method is universally recognized in scientific literature and databases, making it essential for accurate citation.
To cite a protein structure using its accession code, include the code in the text or reference list, followed by the PDB citation format. For instance, in a sentence, you might write: "The crystal structure of HIV-1 protease (PDB ID: 1HSG) reveals key interactions for drug design." In a reference list, the format typically includes the accession code, authors (if applicable), title, and the PDB entry link. For example: "1HSG: HIV-1 protease-inhibitor complex. Available from: https://www.rcsb.org/structure/1HSG." This approach ensures the structure is easily traceable for readers and reviewers.
Accession codes are particularly useful because they remain constant even when structural data is updated or revised. Unlike descriptive names or titles, which can vary, the 4-character code uniquely identifies the structure regardless of changes in resolution, experimental method, or associated metadata. This stability makes accession codes the gold standard for citing PDB entries, especially in fields like structural biology, drug discovery, and bioinformatics, where precise referencing is critical.
When citing multiple structures, list their accession codes separately, either in the text or in a table for clarity. For example: "The structures of myoglobin (PDB ID: 1MBO), cytochrome c (PDB ID: 1HRC), and lysozyme (PDB ID: 1LYZ) were analyzed for comparative studies." This practice avoids ambiguity and allows readers to quickly access the relevant structures in the PDB. Additionally, tools like PDBsum or PDBe can provide further details associated with these codes, enhancing the depth of your citation.
Finally, always verify the accession code for accuracy before citation, as errors can lead to incorrect referencing. The PDB website (https://www.rcsb.org) offers a search function to confirm codes and retrieve associated metadata. By consistently using accession codes, researchers contribute to a standardized and reproducible citation practice, fostering transparency and reliability in scientific communication. This method not only simplifies citations but also ensures that the structural data remains accessible and verifiable for future studies.
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Citation Guidelines: Follow official PDB recommendations for proper academic referencing in publications
When citing the Protein Data Bank (PDB) in academic publications, it is essential to follow the official recommendations provided by the PDB to ensure proper attribution and adherence to scholarly standards. The PDB is a vital resource for structural biology, and accurate citation helps acknowledge the contributions of researchers and maintainers of the database. The PDB provides clear guidelines on how to cite both the database itself and individual structures retrieved from it. These guidelines are designed to promote consistency and give credit to the original depositors of the structural data.
For citing the PDB as a general resource, the recommended format includes acknowledging the worldwide PDB partnership. The citation should read: "Protein Data Bank (PDB) (2023) PDBID:
When citing individual PDB entries in the text of your publication, it is crucial to include the PDB ID and the year the structure was released or updated. For example, you might write: "The crystal structure of the enzyme (PDB ID: 1ABC, 2005) reveals key insights into its catalytic mechanism." This approach ensures that readers can easily locate the specific structure you are discussing. In the reference list, provide a full citation for each PDB entry, following the format recommended by the PDB, which includes the PDB ID, title, authors, journal reference (if applicable), and the DOI linking to the PDB entry.
The PDB also emphasizes the importance of citing original publications associated with the structural data whenever possible. Many PDB entries are accompanied by peer-reviewed articles that describe the experimental methods and biological findings in detail. Including these references in your bibliography not only gives credit to the original researchers but also provides additional context for your readers. For example, if a PDB entry is based on a published study, cite both the PDB entry and the corresponding journal article.
Finally, for publications that heavily rely on PDB data or tools, consider including an acknowledgment section to express gratitude to the PDB and its funding agencies. This practice fosters a culture of recognition and supports the continued development and maintenance of the database. By adhering to these citation guidelines, researchers contribute to the integrity of scientific communication and ensure that the PDB remains a sustainable and widely respected resource in the field of structural biology. Always consult the official PDB citation guide for the most up-to-date recommendations.
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Software Tools: Utilize tools like RCSB PDB for generating correct citation formats
When citing the Protein Data Bank (PDB), accuracy and consistency are crucial to ensure proper acknowledgment of the data and its contributors. One of the most effective ways to achieve this is by utilizing software tools specifically designed for generating correct citation formats. The RCSB Protein Data Bank (PDB) website offers built-in features that simplify the citation process, ensuring compliance with academic and scientific standards. By leveraging these tools, researchers can avoid errors and save time, allowing them to focus on their analysis rather than formatting citations manually.
The RCSB PDB website provides a dedicated citation generator for each PDB entry. To access this feature, navigate to the specific structure of interest on the RCSB PDB website. Once on the structure’s page, look for the "Cite This Entry" or "Citation" section, typically found in the header or sidebar. Clicking on this option will display the recommended citation format, which includes essential details such as the PDB ID, authors, title, journal reference, and DOI. This citation is pre-formatted in widely accepted styles, such as APA, MLA, or BibTeX, making it adaptable to various publication requirements.
In addition to the citation generator, the RCSB PDB also offers downloadable citation files in formats like BibTeX and RIS. These files can be directly imported into reference management software such as Zotero, Mendeley, or EndNote, streamlining the process of adding PDB entries to bibliographies. To download these files, locate the "Download Files" section on the structure’s page and select the appropriate citation format. This feature is particularly useful for researchers managing large numbers of references or working within collaborative environments.
Another valuable tool provided by the RCSB PDB is the PDBx/mmCIF Dictionary, which includes guidelines for citing PDB data in publications. This resource ensures that citations are not only correctly formatted but also include all necessary metadata, such as version numbers and deposition dates. By adhering to these guidelines, researchers contribute to the transparency and reproducibility of their work, aligning with best practices in data citation.
For those who prefer programmatic access, the RCSB PDB API allows developers to retrieve citation information directly into their workflows. By querying the API with a specific PDB ID, users can obtain structured citation data in JSON or XML formats, which can then be integrated into custom scripts or applications. This method is ideal for bioinformatics researchers or software developers who need to automate the citation process for large-scale projects.
In summary, utilizing software tools like the RCSB PDB for generating correct citation formats is a reliable and efficient approach to citing the Protein Data Bank. Whether through the website’s built-in citation generator, downloadable files, or API access, these tools ensure that citations are accurate, consistent, and compliant with scientific standards. By incorporating these resources into their workflow, researchers can uphold the integrity of their work while giving proper credit to the contributors of PDB data.
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Acknowledging Contributions: Credit authors, depositors, and PDB resources in your work
When using data from the Protein Data Bank (PDB) in your research, it is essential to properly acknowledge the contributions of authors, depositors, and the PDB resources themselves. This not only gives credit where it is due but also ensures compliance with ethical standards and data usage policies. The PDB is a public repository that relies on the scientific community's contributions, and proper citation helps maintain the integrity and sustainability of this valuable resource.
To begin, always cite the specific PDB entry or entries you have used in your work. Each PDB entry has a unique four-character identifier (e.g., 1ABC), and this should be included in your citation. The recommended format for citing a PDB entry is as follows: "Author(s) (Year) Title of the article. Journal Name, Volume(Issue), Pages. PDB ID: xxxx." For example, "Smith, J., & Doe, A. (2020) Crystal structure of human hemoglobin. *Journal of Molecular Biology*, 420(2), 250-260. PDB ID: 1HHO." This format ensures that both the original research and the PDB entry are properly acknowledged.
In addition to citing the PDB entry, it is crucial to credit the depositors who contributed the structural data. Depositors are the researchers or groups responsible for determining and submitting the structure to the PDB. Their contributions are often acknowledged in the PDB entry's metadata, which can be found on the PDB website. When citing a PDB entry, include a statement recognizing the depositors' efforts, such as "We thank the depositor(s) for making the structural data available through the Protein Data Bank (PDB ID: xxxx)." This simple acknowledgment highlights the importance of their work in enabling your research.
Furthermore, acknowledge the PDB itself as a resource in your work. The PDB is maintained by the Worldwide Protein Data Bank (wwPDB), a collaborative organization that ensures the archive's accessibility and sustainability. Include a statement in your acknowledgments section, such as "This work made use of the Protein Data Bank (PDB), which is supported by the wwPDB member organizations: PDBe (Europe), RCSB (USA), and PDBj (Japan)." This recognition highlights the infrastructure and support provided by the PDB, which facilitates global access to structural data.
Lastly, consider the specific tools or software provided by the PDB that you have utilized in your research. The PDB offers various resources, such as the RCSB PDB website, PDBePISA, and PDB-101, which provide valuable functionalities for analyzing and visualizing structural data. If you have used any of these tools, acknowledge them explicitly. For example, "We utilized the RCSB PDB website (www.rcsb.org) for structure visualization and analysis" or "PDBePISA (http://www.ebi.ac.uk/msd-srv/prot_int/pistart.html) was employed to identify protein interfaces." These acknowledgments demonstrate your awareness of the PDB's comprehensive resources and their role in advancing your research.
By following these guidelines, you ensure that your work properly acknowledges the contributions of authors, depositors, and PDB resources. Proper citation not only adheres to ethical standards but also fosters a culture of recognition and collaboration within the scientific community. It encourages continued contributions to the PDB, ultimately benefiting the entire research ecosystem. Remember, acknowledging contributions is not just a formality but a vital aspect of responsible and transparent scientific practice.
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Frequently asked questions
The Protein Data Bank (PDB) is a global repository of 3D structure data for proteins, nucleic acids, and other biomolecules. Citing the PDB is essential to acknowledge the source of structural data used in research, ensuring proper credit to the original contributors and maintaining scientific integrity.
To cite a PDB entry, use the following format: "PDB ID (e.g., 1XYZ) [PDB ID hyperlink or DOI if available], [Year of deposition], [Title of the entry if applicable], [Authors of the structure]." Always include the PDB ID and the year of deposition.
Citation information for a PDB entry can be found on the PDB website under the "Citation" or "Reference" section for that specific entry. It typically includes the authors, title, journal, and DOI if available.
It is best to cite both the PDB entry and the original publication associated with the structure. The PDB entry provides direct access to the data, while the original publication offers context and experimental details.
In APA style: "PDB ID (Year). Title of the entry. Protein Data Bank. https://doi.org/DOI_if_available."
In MLA style: "Authors of the structure. 'Title of the entry.' Protein Data Bank, Year, PDB ID."
In Chicago style: "Authors of the structure. Year. 'Title of the entry.' Protein Data Bank. PDB ID."
Always check specific style guide requirements for precise formatting.
