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Related Concept Videos

Selectins01:25

Selectins

Cell adhesion isĀ  an essential aspect of multicellularity. While stable cell interactions usually occur between cells of the same type, transient cell interactions occur between cells of different tissue types, such as between neutrophils and endothelial cells. Selectins are one class of cell adhesion molecules (CAMs) that bind carbohydrate ligands to form transient cell adhesion. They are rod-like proteins with a long extracellular part of variable length ending with the lectin domain, which...
Membrane Carbohydrates01:30

Membrane Carbohydrates

The plasma membrane is a dynamic barrier composed of lipids, proteins, and carbohydrates. It is the epicenter of many cellular processes required for cell growth and survival. Carbohydrates have unique structural and chemical properties that help the plasma membrane to carry out its functions effectively.
Membrane carbohydrates do not have any hydrophobic region and are exclusively located on the cell's outer surface. The addition of sugar molecules or glycosylation of proteins happens in...
Red Algae01:23

Red Algae

Red algae, also known as rhodophytes, are primarily found in marine environments, though some species inhabit freshwater and terrestrial ecosystems. These organisms exist in both unicellular and multicellular forms, with some multicellular varieties reaching macroscopic sizes.As phototrophic organisms, red algae contain chlorophyll a; however, their chloroplasts lack chlorophyll b. Instead, they possess phycobiliproteins, which serve as major light-harvesting pigments, similar to those found in...
Immunoglobulin-like Cell Adhesion Molecules01:31

Immunoglobulin-like Cell Adhesion Molecules

Immunoglobulin-like cell adhesion molecules or Ig-CAMs are a versatile group of cell surface glycoproteins belonging to the immunoglobulin protein superfamily. Ig-CAMs possess the characteristic immunoglobulin protein domains and other domains such as the fibronectin type III domain. The Ig domains are glycosylated to varying degrees in different Ig-CAMs.
Ig-CAMs exhibit either homophilic binding (to other Ig-CAMs) or heterophilic binding (to other ligands such as integrins). While most Ig-CAMs...
Diversity of Protists III01:27

Diversity of Protists III

Rhizaria are a diverse group of unicellular protists characterized by their threadlike cytoplasmic extensions known as pseudopodia. These structures aid in both locomotion and feeding, giving Rhizaria an amoeboid appearance. Their amoeboid morphology once led to taxonomic confusion, but molecular phylogenetics has clarified their evolutionary placement and emphasized their shared use of pseudopodia despite divergent lineages.This clade comprises diverse lineages such as Chlorarachniophyta,...
Glycocalyx and its Functions01:14

Glycocalyx and its Functions

The glycocalyx is a carbohydrate-rich, fuzzy-appearing layer on the outer surface of the cell membrane. It is highly hydrophilic, because of this it attracts large amounts of water to the cell's surface. This aids the cell's interaction with the watery environment and also helps it to obtain substances dissolved in the water. It is also important for cell identification, self/non-self determination, and embryonic development and is used in cell-to-cell attachments to form tissues.
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Microarray Polymer Profiling (MAPP) for High-Throughput Glycan Analysis
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Diversified carbohydrate-binding lectins from marine resources.

Tomohisa Ogawa1, Mizuki Watanabe, Takako Naganuma

  • 1Department of Biomolecular Sciences, Graduate School of Life Sciences, Tohoku University, Sendai 980-8577, Japan.

Journal of Amino Acids
|February 8, 2012
PubMed
Summary

Marine lectins, proteins recognizing specific carbohydrates, show therapeutic potential. This review explores their structure-activity relationships and molecular evolution, focusing on key families like C-type lectins and galectins.

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Area of Science:

  • Marine biotechnology
  • Biochemistry
  • Molecular biology

Background:

  • Marine organisms are rich sources of bioactive molecules, including proteins like lectins.
  • Lectins are proteins that bind carbohydrates, playing roles in cell recognition, communication, and host-pathogen interactions.
  • Their ability to interact with specific glycoconjugates makes them promising for therapeutic applications.

Purpose of the Study:

  • To review marine-derived lectins, focusing on their structure-activity relationships.
  • To explore the molecular evolution of various marine lectin families.
  • To highlight unique properties of C-type lectins, galectins, F-type lectins, and rhamnose-binding lectins from marine sources.

Main Methods:

  • Literature review of studies on marine lectins.
  • Analysis of structure-activity relationships.
  • Examination of molecular evolution data for selected lectin families.

Main Results:

  • Marine lectins exhibit diverse structures and potent bioactivities.
  • Significant variations in structure-activity relationships were observed across different lectin families.
  • Molecular evolution provides insights into the functional diversification of marine lectins.

Conclusions:

  • Marine lectins represent a valuable resource for developing novel therapeutic agents.
  • Understanding their structural and evolutionary properties is crucial for harnessing their potential.
  • Further research into specific marine lectin families can unlock new biomedical applications.