PMID- 10623524 OWN - NLM STAT- MEDLINE DCOM- 20000215 LR - 20071114 IS - 0022-2836 (Print) IS - 0022-2836 (Linking) VI - 295 IP - 2 DP - 2000 Jan 14 TI - NMR structure of tissue inhibitor of metalloproteinases-1 implicates localized induced fit in recognition of matrix metalloproteinases. PG - 257-68 AB - A high quality solution structure of the matrix metalloproteinase inhibitory N-terminal domain of recombinant human tissue inhibitor of metalloproteinases-1 (N-TIMP-1) has been determined. For the rigidly packed residues, the average RMSD to the mean structure is 0. 57 A for the backbone atoms and 1.00 A for all heavy atoms. Comparison of the solution structure of free N-TIMP-1 with the crystal structure of TIMP-1 bound to the catalytic domain of MMP-3 ( Gomis-R]uth et al., 1997 ) shows that the structural core of the beta barrel flanked by helices is nearly unchanged by the association with MMP-3, evident from a backbone RMSD of 1.15 A. However, clear differences in the conformation of the MMP-binding ridge of free and MMP-bound TIMP-1 suggest induced fit throughout the ridge. The MMP-dependent conformational changes in the ridge include a dramatic bending of AB loop residues Glu28 through Leu34, moderate hinge bending of the CD-loop about residues Ala65 and Cys70, and modest bending of the Cys1 through Pro6 segment. A large number of interresidue Nuclear Overhauser enhancements (NOEs) augmented by stereospecific assignments, torsion restraints, and dipolar couplings (an average of 18 non-trivial restraints per residue) engender confidence in these structural inferences. A tight cluster of three lysine residues and one arginine residue atop beta-strands A and B, and identical among TIMP sequences, form the heart of a highly conserved electropositive patch that may interact with anionic components of the extracellular matrix. CI - Copyright 2000 Academic Press. FAU - Wu, B AU - Wu B AD - Department of Biochemistry, University of Missouri, 117 Schweitzer Hall, Columbia, MO 65211, USA. FAU - Arumugam, S AU - Arumugam S FAU - Gao, G AU - Gao G FAU - Lee, G I AU - Lee GI FAU - Semenchenko, V AU - Semenchenko V FAU - Huang, W AU - Huang W FAU - Brew, K AU - Brew K FAU - Van Doren, S R AU - Van Doren SR LA - eng SI - PDB/1D2B GR - AR40994/AR/NIAMS NIH HHS/United States GR - GM57289/GM/NIGMS NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - Netherlands TA - J Mol Biol JT - Journal of molecular biology JID - 2985088R RN - 0 (Recombinant Proteins) RN - 0 (Tissue Inhibitor of Metalloproteinase-1) RN - EC 3.4.24.- (Matrix Metalloproteinases) SB - IM MH - Catalytic Domain MH - Humans MH - Magnetic Resonance Spectroscopy MH - Matrix Metalloproteinases/*metabolism MH - Models, Molecular MH - Protein Conformation MH - Recombinant Proteins/chemistry/metabolism MH - Surface Properties MH - Tissue Inhibitor of Metalloproteinase-1/*chemistry/metabolism EDAT- 2000/01/07 09:00 MHDA- 2000/02/19 09:00 CRDT- 2000/01/07 09:00 PHST- 2000/01/07 09:00 [pubmed] PHST- 2000/02/19 09:00 [medline] PHST- 2000/01/07 09:00 [entrez] AID - 10.1006/jmbi.1999.3362 [doi] AID - S0022-2836(99)93362-4 [pii] PST - ppublish SO - J Mol Biol. 2000 Jan 14;295(2):257-68. doi: 10.1006/jmbi.1999.3362.