Related Experiment Video
Updated: May 19, 2026

09:51
Investigating Protein Sequence-structure-dynamics Relationships with Bio3D-web
Published on: July 16, 2017
PACSY, a relational database management system for protein structure and chemical shift analysis
Woonghee Lee1, Wookyung Yu, Suhkmann Kim
1National Magnetic Resonance Facility at Madison, and Biochemistry Department, University of Wisconsin-Madison, Madison, WI 53706, USA. whlee@nmrfam.wisc.edu
Journal of Biomolecular NMR
|August 21, 2012
Summary
PACSY is a relational database integrating protein structure and chemical shift data. It aids researchers by enabling complex queries across multiple biological databases.
Area of Science:
- Biochemistry
- Structural Biology
- Bioinformatics
Background:
- NMR spectroscopy is crucial for determining protein structure and dynamics.
- Integrating diverse biological data sources enhances research capabilities.
- Existing databases may lack comprehensive integration of chemical shift and structural data.
Purpose of the Study:
- To introduce PACSY (Protein structure And Chemical Shift NMR spectroscopY), a novel relational database management system.
- To facilitate integrated data retrieval for protein structure and NMR chemical shift information.
- To support advanced research queries by combining data from multiple sources.
Main Methods:
- Developed a relational database system (PACSY) with six linked table types.
- Integrated data from the Protein Data Bank, Biological Magnetic Resonance Data Bank, and Structural Classification of Proteins.
- Implemented advanced search functions using RDBMS servers (MySQL, PostgreSQL).
- Created PACSY Maker for database creation and PACSY Analyzer for analysis.
Main Results:
- PACSY successfully integrates 3D coordinates, chemical shifts, torsion angles, solvent accessible surface areas, and hydrophobicity scales.
- The system supports complex, cross-database queries.
- Software for database creation and analysis is available.
Conclusions:
- PACSY provides a unified platform for accessing and analyzing integrated protein structure and chemical shift data.
- The database enhances research efficiency by simplifying data retrieval.
- PACSY is a valuable resource for structural biologists and biochemists utilizing NMR data.
Related Concept Videos
Protein Organization
Proteins are polymers of amino acid residues. They are versatile and responsible for different cellular functions, including DNA replication, molecular transport, catalysis, and structural support. Proteins have a hierarchical structure comprising at least three levels of organization: primary, secondary, and tertiary structure. Some large proteins have a quaternary structure where individual protein subunits are linked together.
The primary structure of a protein is its amino acid sequence.
The primary structure of a protein is its amino acid sequence.
Protein and Protein Structure
Proteins are one of the most abundant organic molecules in living systems and have the most diverse range of functions of all macromolecules. Proteins may be structural, regulatory, contractile, or protective. They may serve in transport, storage, or membranes; or they may be toxins or enzymes. Their structures, like their functions, vary greatly. They are all, however, amino acid polymers arranged in a linear sequence.
A protein's shape is critical to its function. For example, an enzyme can...
A protein's shape is critical to its function. For example, an enzyme can...
Protein and Protein Structures
Proteins are one of the most abundant organic molecules in living systems and have the most diverse range of functions of all macromolecules. Proteins may be structural, regulatory, contractile, or protective. They may serve in transport, storage, or membranes; or they may be toxins or enzymes. Their structures, like their functions, vary greatly. They are all, however, amino acid polymers arranged in a linear sequence.
A protein's shape is critical to its function. For example, an enzyme can...
A protein's shape is critical to its function. For example, an enzyme can...
Protein Families
Protein families are groups of homologous proteins; that is, they have similarities in amino acid sequences and three-dimensional structures. Protein families usually occur because of gene duplication, where an additional copy of a gene is inserted into the genome of an organism. Mutations that change the amino acids but still allow the protein to be properly synthesized, will lead to new protein family members. If these new proteins contain similar amino acids in key locations, protein...
¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)
When proton-coupled carbon-13 spectra are simplified by a broadband proton decoupling technique, structural information about the coupled protons is lost. Distortionless enhancement by polarization transfer (DEPT) is a technique that provides information on the number of hydrogens attached to each carbon in a molecule. While the DEPT experiment utilizes complex pulse sequences, the pulse delay and flip angle are specifically manipulated. The resulting signals have different phases depending on...

