Crystal structure of human lithostathine, the pancreatic inhibitor of stone formation.Bertrand, J.A., Pignol, D., Bernard, J.P., Verdier, J.M., Dagorn, J.C., Fontecilla-Camps, J.C.
(1996) EMBO J. 15: 2678-2684
- PubMed: 8654365
- Also Cited By: 1GZ2
- PubMed Abstract:
- Homology of Human Pancreatic Stone Protein with Animal Lectins
(1988) Biochem.J. 253: 309
- Inhibition of Nucleation and Crystal Growth of Calcium Carbonate Crystals by Human Lithostathine
Bernard, J.P.,Adrich, Z.,Montalto, G.,Decaro, A.,De Reggi, M.,Sarles, H.,Dagorn, J-C.
(1992) Gastroenterology 103: 1277
- Crystallization and Preliminary Crystallographic Study of Human Lithostathine
Pignol, D.,Bertrand, J.A.,Bernard, J.P.,Verdier, J.M.,Dagorn, J.C.,Fontacilla-Camps, J.C.
(1995) Proteins 23: 604
Human lithostathine (HLIT) is a pancreatic glycoprotein which inhibits the growth and nucleation of calcium carbonate crystals. The crystal structure of the monomeric 17 kDa HLIT, determined to a resolution of 1.55 angstroms, was refined to a crystal ...
Human lithostathine (HLIT) is a pancreatic glycoprotein which inhibits the growth and nucleation of calcium carbonate crystals. The crystal structure of the monomeric 17 kDa HLIT, determined to a resolution of 1.55 angstroms, was refined to a crystallographic R-factor of 18.6%. Structural comparison with the carbohydrate-recognition domains of rat mannose-binding protein and E-selectin indicates that the C-terminal domain of HLIT shares a common architecture with the C-type lectins. Nevertheless, HLIT does not bind carbohydrate nor does it contain the characteristic calcium-binding sites of the C-type lectins. In consequence, HLIT represents the first structurally characterized member of this superfamily which is not a lectin. Analysis of the charge distribution and calculation of its dipole moment reveal that HLIT is a strongly polarized molecule. Eight acidic residues which are separated by regular 6 angstrom spacings form a unique and continuous patch on the molecular surface. This arrangement coincides with the distribution of calcium ions on certain planes of the calcium carbonate crystal; the dipole moment of HLIT may play a role in orienting the protein on the crystal surface prior to the more specific interactions of the acidic residues.
Laboratoire de Cristallographie et Cristallogénèse des Protéines, Institut de Biologie Structurale J.P. Ebel, CEA-CNRS, France.