Structural highlights
2mls is a 1 chain structure with sequence from Human. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance.
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| Ligands: | , , |
| Related: | 2poj, 2mlr |
| Gene: | MMP12, HME (HUMAN) |
| Activity: | Macrophage elastase, with EC number 3.4.24.65 |
| Resources: | FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT |
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Function
[MMP12_HUMAN] May be involved in tissue injury and remodeling. Has significant elastolytic activity. Can accept large and small amino acids at the P1' site, but has a preference for leucine. Aromatic or hydrophobic residues are preferred at the P1 site, with small hydrophobic residues (preferably alanine) occupying P3.
Publication Abstract from PubMed
Matrix metalloproteinases (MMPs) regulate tissue remodelling, inflammation and disease progression. Some soluble MMPs are inexplicably active near cell surfaces. Here we demonstrate the binding of MMP-12 directly to bilayers and cellular membranes using paramagnetic NMR and fluorescence. Opposing sides of the catalytic domain engage spin-labelled membrane mimics. Loops project from the beta-sheet interface to contact the phospholipid bilayer with basic and hydrophobic residues. The distal membrane interface comprises loops on the other side of the catalytic cleft. Both interfaces mediate MMP-12 association with vesicles and cell membranes. MMP-12 binds plasma membranes and is internalized to hydrophobic perinuclear features, the nuclear membrane and inside the nucleus within minutes. While binding of TIMP-2 to MMP-12 hinders membrane interactions beside the active site, TIMP-2-inhibited MMP-12 binds vesicles and cells, suggesting compensatory rotation of its membrane approaches. MMP-12 association with diverse cell membranes may target its activities to modulate innate immune responses and inflammation.
Ambidextrous binding of cell and membrane bilayers by soluble matrix metalloproteinase-12.,Koppisetti RK, Fulcher YG, Jurkevich A, Prior SH, Xu J, Lenoir M, Overduin M, Van Doren SR Nat Commun. 2014 Nov 21;5:5552. doi: 10.1038/ncomms6552. PMID:25412686[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Koppisetti RK, Fulcher YG, Jurkevich A, Prior SH, Xu J, Lenoir M, Overduin M, Van Doren SR. Ambidextrous binding of cell and membrane bilayers by soluble matrix metalloproteinase-12. Nat Commun. 2014 Nov 21;5:5552. doi: 10.1038/ncomms6552. PMID:25412686 doi:http://dx.doi.org/10.1038/ncomms6552
