View source for 4upt


==structure of bovine endothelial nitric oxide synthase heme domain in complex with n'-[4-[[(2s,4r)-4-[3-[(c-thiophen-2-ylcarbonimidoyl)amino]phenoxy]pyrrolidin-2-yl]methoxy]phenyl]thiophene-2-carboximidamide==
<StructureSection load='4upt' size='340' side='right'caption='[[4upt]], [[Resolution|resolution]] 2.20&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4upt]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Bos_taurus Bos taurus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4UPT OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4UPT FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.2&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACT:ACETATE+ION'>ACT</scene>, <scene name='pdbligand=CAS:S-(DIMETHYLARSENIC)CYSTEINE'>CAS</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=H4B:5,6,7,8-TETRAHYDROBIOPTERIN'>H4B</scene>, <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene>, <scene name='pdbligand=PQW:N-[4-[[(2S,4R)-4-[3-[(C-THIOPHEN-2-YLCARBONIMIDOYL)AMINO]PHENOXY]PYRROLIDIN-2-YL]METHOXY]PHENYL]THIOPHENE-2-CARBOXIMIDAMIDE'>PQW</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=4upt FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4upt OCA], [https://pdbe.org/4upt PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4upt RCSB], [https://www.ebi.ac.uk/pdbsum/4upt PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4upt ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/NOS3_BOVIN NOS3_BOVIN] Produces nitric oxide (NO) which is implicated in vascular smooth muscle relaxation through a cGMP-mediated signal transduction pathway. NO mediates vascular endothelial growth factor (VEGF)-induced angiogenesis in coronary vessels and promotes blood clotting through the activation of platelets.
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== Publication Abstract from PubMed ==
To develop potent and selective nNOS inhibitors, a new series of double-headed molecules with chiral linkers that derive from natural amino acid derivatives have been designed and synthesized. The new structures integrate a thiophenecarboximidamide head with two types of chiral linkers, presenting easy synthesis and good inhibitory properties. Inhibitor (S)-9b exhibits a potency of 14.7nM against nNOS and is 1134 and 322-fold more selective for nNOS over eNOS and iNOS, respectively. Crystal structures show that the additional binding between the aminomethyl moiety of 9b and propionate A on the heme and tetrahydrobiopterin (H4B) in nNOS, but not eNOS, contributes to its high selectivity. This work demonstrates the advantage of integrating known structures into structure optimization, and it should be possible to more readily develop compounds that incorporate bioavailability with these advanced features. Moreover, this integrative strategy is a general approach in new drug discovery.

Combination of chiral linkers with thiophenecarboximidamide heads to improve the selectivity of inhibitors of neuronal nitric oxide synthase.,Jing Q, Li H, Roman LJ, Martasek P, Poulos TL, Silverman RB Bioorg Med Chem Lett. 2014 Aug 12. pii: S0960-894X(14)00814-2. doi:, 10.1016/j.bmcl.2014.07.079. PMID:25149509<ref>PMID:25149509</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 4upt" style="background-color:#fffaf0;"></div>

==See Also==
*[[Nitric Oxide Synthase 3D structures|Nitric Oxide Synthase 3D structures]]
== References ==
<references/>
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</StructureSection>
[[Category: Bos taurus]]
[[Category: Large Structures]]
[[Category: Li H]]
[[Category: Poulos TL]]