1tlp

<table><tr><td colspan='2'>[[1tlp]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/'bacillus_thermoproteolyticus' 'bacillus thermoproteolyticus']. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1TLP OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1TLP FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=RDF:N-ALPHA-L-RHAMNOPYRANOSYLOXY(HYDROXYPHOSPHINYL)-L-LEUCYL-L-TRYPTOPHAN'>RDF</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>

<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Thermolysin Thermolysin], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.24.27 3.4.24.27] </span></td></tr>

<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1tlp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1tlp OCA], [http://pdbe.org/1tlp PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1tlp RCSB], [http://www.ebi.ac.uk/pdbsum/1tlp PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1tlp ProSAT]</span></td></tr>

[[http://www.uniprot.org/uniprot/THER_BACTH THER_BACTH]] Extracellular zinc metalloprotease.

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== Publication Abstract from PubMed ==

The mode of binding to thermolysin of the unsubstituted phosphoramidate inhibitor N-phosphoryl-L-leucinamide (P-Leu-NH2) has been determined crystallographically and refined at high resolution (R = 17.9% to 0.16-nm resolution). The mode of binding of the naturally occurring thermolysin inhibitor phosphoramidon reported previously [Weaver, L. H., Kester, W. R. and Matthews, B. W. (1977) J. Mol. Biol. 114, 119-132] has also been confirmed by crystallographic refinement (R = 17.4% to 0.23-nm resolution). Phosphoramidon binds to the enzyme with a single oxygen of the phosphoramidate moiety as a zinc ligand. Together with three ligands to the metal from the protein the resultant complex has approximately tetrahedral geometry. However, in the case of P-Leu-NH2, two of the phosphoramidate oxygens interact with the zinc to form a complex that tends towards pentacoordinate. In this respect, P-Leu-NH2 appears to be a better transition-state analog than is phosphoramidon. In addition, the phosphorus-nitrogen bond length in P-Leu-NH2 is 0.18 nm, suggesting that the nitrogen is protonated whereas the same bond in phosphoramidon is much shorter (0.15 nm) suggesting that the nitrogen does not carry a charge. In phosphoramidon the distance from the phosphoramide nitrogen to Glu-143 is 0.39 nm whereas in P-Leu-NH2 this distance decreases to 0.34 nm. Taken together, these observations provide additional evidence in support of the participation of pentacoordinate intermediates in the mechanism of action of thermolysin [Holmes, M. A. and Matthews, B. W. (1981) Biochemistry 20, 6912-6920] and the role of Glu-143 in first promoting the attack of a water molecule on the carbonyl carbon of the scissile bond and subsequently acting as a 'proton shuttle' to transfer the proton to the leaving nitrogen [Monzingo, A. F. and Matthews, B. W. (1984) Biochemistry 23, 5724-5729; Hangauer, D. G., Monzingo, A. F. and Matthews, B. W. (1984) Biochemistry 23, 5730-5741].

Crystallographic structural analysis of phosphoramidates as inhibitors and transition-state analogs of thermolysin.,Tronrud DE, Monzingo AF, Matthews BW Eur J Biochem. 1986 Jun 2;157(2):261-8. PMID:3709536<ref>PMID:3709536</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>

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<div class="pdbe-citations 1tlp" style="background-color:#fffaf0;"></div>

*[[Thermolysin|Thermolysin]]

[[Category: Matthews, B W]]

[[Category: Monzingo, A F]]

[[Category: Tronrud, D E]]

[[Category: Metalloproteinase]]