Cited by 1,679Protein Interaction Studies and Fluorescence AnalysisProtein Structure and DynamicsEnzyme Structure and Function

The lipocalin protein family: structure and function

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FLOWER, Darren R.·1996·Biochemical Journal

Abstract

The lipocalin protein family is a large group of small extracellular proteins. The family demonstrates great diversity at the sequence level; however, most lipocalins share three characteristic conserved sequence motifs, the kernel lipocalins, while a group of more divergent family members, the outlier lipocalins, share only one. Belying this sequence dissimilarity, lipocalin crystal structures are highly conserved and comprise a single eight-stranded continuously hydrogen-bonded antiparallel beta-barrel, which encloses an internal ligand-binding site. Together with two other families of ligand-binding proteins, the fatty-acid-binding proteins (FABPs) and the avidins, the lipocalins form part of an overall structural superfamily: the calycins. Members of the lipocalin family are characterized by several common molecular-recognition properties: the ability to bind a range of small hydrophobic molecules, binding to specific cell-surface receptors and the formation of complexes with soluble macromolecules. The varied biological functions of the lipocalins are mediated by one or more of these properties. In the past, the lipocalins have been classified as transport proteins; however, it is now clear that the lipocalins exhibit great functional diversity, with roles in retinol transport, invertebrate cryptic coloration, olfaction and pheromone transport, and prostaglandin synthesis. The lipocalins have also been implicated in the regulation of cell homoeostasis and the modulation of the immune response, and, as carrier proteins, to act in the general clearance of endogenous and exogenous compounds.

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  • LCN proteins are secreted proteins that bind small hydrophobic ligands through their conical β barrels.

    “Lipocalin (LCN) proteins are secreted proteins that bind small hydrophobic ligands through their conical β barrels [252,253].”

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  1. Sivaprasadarao, A., Boudjelal, M. and Findlay, J. B. C. (1993) Biochem. Soc. Trans. 21, 619-622
  2. Goodman, W.S (1984) in The Retinoids (Sporn, M. B., Roberts, A. B. and Goodman, W. S, eds.), vol. 2, pp. 41-88, Academic Press, New York 40
  3. Magert, H.-J., Hadrys, T., Cieslak, A., Groger, A., Feller, S. and Forssmann, W.-G. (1995) Proc. Natl. Acad. Sci. U.S.A. 92, 2091-2095
  4. Pevsner, J., Trifiletti, R. R., Strittmatter, S. M. and Snyder, S. H. (1985) Proc. Natl. Acad. Sci. U.S.A. 82, 3050-3054
  5. Nagata, A., Suzuki, Y., Igarashi, M., Eguchi, N., Toh, H., Urade, Y. and Hayaishi, O. (1991) Proc. Natl. Acad. Sci. U.S.A. 88, 4020-4024
  6. Julkunen, M., Seppala, M. and Janne, O. A. (1988) Proc. Natl. Acad. Sci. U.S.A. 85, 8845-8849 92
  7. Mendez, E., Fernandez-Luna, J. L., Grubb, A. and Levy-Cobian (1986) Proc. Natl.Acad. Sci. U.S.A. 83, 3050-3054 101
  8. Bennett, M. and Schmid, K. (1980) Proc. Natl. Acad. Sci. U.S.A. 77, 6109-6113 109
  9. Spence, A. M., Sheppard, P. C., Davie, J. R., Matuo, Y., Nishi, N., McKeehan, W. L., Dodd, J. G. and Matusik, R. J. (1989) Proc. Natl. Acad. Sci. U.S.A. 86, 7843-7847 130

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Authors
FLOWER, D. R.
Affiliations
Department of Physical Chemistry and BioAnalysis, Astra Charnwood, Bakewell Road, Loughborough, Leics. LE11 5RH, U.K.
Corresponding author
FLOWER, Darren R.
Venue
Biochemical Journal
Published
1996-08-15
Volume
318
Issue
1
Pages
1-14
ISSN
  • 0264-6021 (ISSN-L)
  • 1470-8728
OpenAlex
W2040141270
Cited by
1,679
References
148
Citations by year
2026: 24 · 2025: 33 · 2024: 41 · 2023: 53 · 2022: 49 · 2021: 64 · 2020: 68 · 2019: 51 · 2018: 43 · 2017: 53 · 2016: 69 · 2015: 73 · 2014: 79 · 2013: 81 · 2012: 91
FWCI
3.93
Type
journal article
Language
en
Open access
Locations
  • Biochemical Journal (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Interaction Studies and Fluorescence Analysis
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Structure and Dynamics
  • Physical Sciences › Materials Science › Materials Chemistry › Enzyme Structure and Function
Keywords
lipocalin, protein structure, beta-barrel, ligand-binding proteins, fatty acid binding protein, avidin, retinol transport, cryptic coloration, olfaction, prostaglandin synthesis, cell surface receptors, membrane transporters, immune regulation
MeSH terms
Adjuvants, Immunologic, Amino Acid Sequence, Avidin, Carrier Proteins, Ligands, Models, Molecular, Molecular Sequence Data, Neoplasm Proteins, Pheromones, Protein Binding, Proteins, Receptors, Cell Surface, Smell, Myelin P2 Protein, Fatty Acid-Binding Proteins

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