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Related Experiment Videos

Collectins: pattern recognition molecules involved in first line host defense

K Sastry1, R A Ezekowitz

  • 1Department of Pathology, Boston University School of Medicine, Massachusetts 02118.

Current Opinion in Immunology
|February 1, 1993
PubMed
Summary

Collectins are chimeric molecules with carbohydrate recognition domains and collagen tails. These pattern recognition molecules, including mannose-binding proteins, are crucial for the innate immune system's first line of defense.

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Area of Science:

  • Biochemistry
  • Immunology
  • Molecular Biology

Background:

  • Collectins are a family of C-type lectins characterized by a collagen-like domain and a carbohydrate-binding lectin domain.
  • These molecules play a significant role in the innate immune system, bridging pathogen recognition with effector functions.
  • Examples include mannose-binding lectin (MBL), pulmonary surfactant proteins A (SP-A) and D (SP-D), and conglutinin.

Purpose of the Study:

  • To define the structural and functional characteristics of the collectin family of proteins.
  • To elucidate the role of collectins as pattern recognition molecules in host defense.
  • To identify key members of the collectin family and their significance in innate immunity.

Main Methods:

  • Structural analysis of collectin domains (globular heads and collagen tails).

Related Experiment Videos

  • Biochemical assays to assess carbohydrate binding properties.
  • Functional studies investigating pathogen recognition and opsonization.
  • Comparative analysis of collectin family members.

    • Main Results:

    • Collectins are defined by their chimeric structure: globular carbohydrate-recognition domains (CRDs) linked to collagenous stalks.
    • The CRDs mediate the binding to specific carbohydrate patterns on microbial surfaces.
    • Collectins function as crucial pattern recognition molecules, initiating the host's first line of defense.
    • Mannose-binding proteins, SP-A, SP-D, and conglutinin are identified as key members of this family.

    Conclusions:

    • Collectins represent a vital class of innate immune molecules.
    • Their unique structure enables them to recognize conserved microbial patterns, facilitating pathogen clearance.
    • Collectins are essential components of the pre-immune host defense system.