Structure of the Regulatory Hyaluronan Binding Domain in the Inflammatory Leukocyte Homing Receptor CD44.Teriete, P., Banerji, S., Noble, M., Blundell, C.D., Wright, A.J., Pickford, A.R., Lowe, E., Mahoney, D.J., Tammi, M.I., Kahmann, J.D., Campbell, I.D., Day, A.J., Jackson, D.G.
(2004) Mol.Cell 13: 483-496
- PubMed: 14992719
- Primary Citation of Related Structures:  1UUH
- PubMed Abstract:
- Characterization of a functional hyaluronan-binding domain from the human CD44 molecule expressed in Escherichia coli
Banerji, S.,Day, A.J.,Kahmann, J.D.,Jackson, D.G.
(1998) Protein Expr.Purif. 14: 371
- Identification of hyaluronic acid binding sites in the extracellular domain of CD44.
Peach, R.J.,Hollenbaugh, D.,Stamenkovic, I.,Aruffo, A.
(1993) J.Cell Biol. 122: 257
- Identification of CD44 residues important for hyaluronan binding and delineation of the binding site
Bajorath, J.,Greenfield, B.,Munro, S.B.,Day, A.J.,Aruffo, A.
(1998) J.Biol.Chem. 273: 338
- Solution Structure of the Link Module: A Hyaluronan-Binding Domain Involved in Extracellular Matrix Stability and Cell Migration
Kohda, D.,Morton, C.J.,Parkar, A.A.,Hatanaka, H.,Inagaki, F.M.,Campbell, I.D.,Day, A.J.
(1996) Cell 86: 767
- Site-specific de-N-glycosylation of CD44 can activate hyaluronan binding, and CD44 activation states show distinct threshold densities for hyaluronan binding
English, N.M.,Lesley, J.F.,Hyman, R.
(1998) Cancer Res. 58: 3736
- CD44 is the principal cell surface receptor for hyaluronate.
Aruffo, A.,Stamenkovic, I.,Melnick, M.,Underhill, C.B.,Seed, B.
(1990) Cell 61: 1303
- A lymphocyte molecule implicated in lymph node homing is a member of the cartilage link protein family.
Stamenkovic, I.,Amiot, M.,Pesando, J.M.,Seed, B.
(1989) Cell 56: 1057
- A human lymphocyte homing receptor, the hermes antigen, is related to cartilage proteoglycan core and link proteins.
A Goldstien, L.,Zhou, D.F.H.,Picker, L.J.,Minty, C.N.,Bargatze, R.F.,Din, J.F.,Butcher, E.C.
(1989) Cell 56: 1063
Adhesive interactions involving CD44, the cell surface receptor for hyaluronan, underlie fundamental processes such as inflammatory leukocyte homing and tumor metastasis. Regulation of such events is critical and appears to be effected by changes in ...
Adhesive interactions involving CD44, the cell surface receptor for hyaluronan, underlie fundamental processes such as inflammatory leukocyte homing and tumor metastasis. Regulation of such events is critical and appears to be effected by changes in CD44 N-glycosylation that switch the receptor "on" or "off" under appropriate circumstances. How altered glycosylation influences binding of hyaluronan to the lectin-like Link module in CD44 is unclear, although evidence suggests additional flanking sequences peculiar to CD44 may be involved. Here we show using X-ray crystallography and NMR spectroscopy that these sequences form a lobular extension to the Link module, creating an enlarged HA binding domain and a formerly unidentified protein fold. Moreover, the disposition of key N-glycosylation sites reveals how specific sugar chains could alter both the affinity and avidity of CD44 HA binding. Our results provide the necessary structural framework for understanding the diverse functions of CD44 and developing novel therapeutic strategies.
Medical Research Council Human Immunology Unit, Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, Headington, Oxford OX3 9DS, United Kingdom.