IMGT Collier-de-Perles

IMGT Collier-de-Perles provides standardized 2D graphical representations (Colliers de Perles) to visualize and analyze V, C, and G domains of immunoglobulins (IG), T cell receptors (TR), and proteins of the Ig-like and MHC-like domain superfamilies for sequence-structure analysis in immunogenetics.

Key Features:

• Standardized Visualization: Generates uniform Colliers de Perles by aligning amino acid sequences according to the IMGT unique numbering system based on structural features for V, C, and G domains.
• Integration with Structural Data: Correlates sequence representations with 3D structural information via the IMGT/3Dstructure-DB and Protein Data Bank (PDB).
• Comprehensive Annotation: Uses IMGT annotation to identify expressed genes and to describe framework regions and complementarity-determining regions with standardized nomenclature.
• Versatile Analytical Applications: Supports analyses such as antibody engineering and humanization, mutation and polymorphism analysis across species, and contact site examination relevant to research and clinical studies including leukemia and lymphoma.

Scientific Applications:

• Sequence-structure analysis: Facilitates mapping and comparison of sequence features onto 2D and 3D structures for immunoglobulin and T-cell receptor domains.
• Antibody engineering and humanization: Aids design and comparison of engineered antibodies and humanized sequences using standardized domain representations.
• Mutation and polymorphism analysis: Enables visualization and comparison of mutations and polymorphisms within framework and complementarity-determining regions across species.
• Contact site and structural analysis: Supports examination of residue contact sites by relating Colliers de Perles to 3D structures from IMGT/3Dstructure-DB and PDB.

Methodology:

Applies IMGT-ONTOLOGY axioms and the IMGT unique numbering system to align sequences by structural features, uses IMGT annotation tools to identify expressed genes and to label framework and complementarity-determining regions, and correlates sequence-based Colliers de Perles with 3D structures from IMGT/3Dstructure-DB and the PDB.