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{{STRUCTURE_4gl7|  PDB=4gl7  |  SCENE=  }}
===Structure of human placental aromatase complexed with designed inhibitor HDDG046 (compound 5)===
{{ABSTRACT_PUBMED_22951074}}


==Disease==
==Structure of human placental aromatase complexed with designed inhibitor HDDG046 (compound 5)==
[[http://www.uniprot.org/uniprot/CP19A_HUMAN CP19A_HUMAN]] Defects in CYP19A1 are a cause of aromatase excess syndrome (AEXS) [MIM:[http://omim.org/entry/139300 139300]]; also known as familial gynecomastia. AEXS is characterized by an estrogen excess due to an increased aromatase activity.  Defects in CYP19A1 are the cause of aromatase deficiency (AROD) [MIM:[http://omim.org/entry/613546 613546]]. AROD is a rare disease in which fetal androgens are not converted into estrogens due to placental aromatase deficiency. Thus, pregnant women exhibit a hirsutism, which spontaneously resolves after post-partum. At birth, female babies present with pseudohermaphroditism due to virilization of extern genital organs. In adult females, manifestations include delay of puberty, breast hypoplasia and primary amenorrhoea with multicystic ovaries.<ref>PMID:8265607</ref><ref>PMID:8530621</ref><ref>PMID:9211678</ref>  
<StructureSection load='4gl7' size='340' side='right'caption='[[4gl7]], [[Resolution|resolution]] 3.90&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4gl7]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4GL7 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4GL7 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]] 3.9&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=0XJ:(6ALPHA,8ALPHA)-6-(PENT-2-YN-1-YLOXY)ANDROSTA-1,4-DIENE-3,17-DIONE'>0XJ</scene>, <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</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=4gl7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4gl7 OCA], [https://pdbe.org/4gl7 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4gl7 RCSB], [https://www.ebi.ac.uk/pdbsum/4gl7 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4gl7 ProSAT]</span></td></tr>
</table>
== Disease ==
[https://www.uniprot.org/uniprot/CP19A_HUMAN CP19A_HUMAN] Defects in CYP19A1 are a cause of aromatase excess syndrome (AEXS) [MIM:[https://omim.org/entry/139300 139300]; also known as familial gynecomastia. AEXS is characterized by an estrogen excess due to an increased aromatase activity.  Defects in CYP19A1 are the cause of aromatase deficiency (AROD) [MIM:[https://omim.org/entry/613546 613546]. AROD is a rare disease in which fetal androgens are not converted into estrogens due to placental aromatase deficiency. Thus, pregnant women exhibit a hirsutism, which spontaneously resolves after post-partum. At birth, female babies present with pseudohermaphroditism due to virilization of extern genital organs. In adult females, manifestations include delay of puberty, breast hypoplasia and primary amenorrhoea with multicystic ovaries.<ref>PMID:8265607</ref> <ref>PMID:8530621</ref> <ref>PMID:9211678</ref>  
== Function ==
[https://www.uniprot.org/uniprot/CP19A_HUMAN CP19A_HUMAN] Catalyzes the formation of aromatic C18 estrogens from C19 androgens.
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Human cytochrome P450 aromatase catalyzes with high specificity the synthesis of estrogens from androgens. Aromatase inhibitors (AIs) such as exemestane, 6-methylidene-androsta-1,4-diene-3,17-dione, are preeminent drugs for the treatment of estrogen-dependent breast cancer. The crystal structure of human placental aromatase has shown an androgen-specific active site. By utilizing the structural data, novel C6-substituted androsta-1,4-diene-3,17-dione inhibitors have been designed. Several of the C6-substituted 2-alkynyloxy compounds inhibit purified placental aromatase with IC50s in the nM range. Anti-proliferation studies in a MCF-7 breast cancer cell line demonstrate that some of these compounds have EC50s better than 1nM, exceeding exemestane. X-ray structures of aromatase-complexes of two potent compounds reveal that, per their design, the novel side groups protrude into the opening to the access channel unoccupied in the enzyme-substrate/exemestane complexes. The observed structure-activity relationship is borne out by the X-ray data. Structure-guided design permits utilization of the aromatase-specific interactions for the development of next generation AIs.


==Function==
Novel Aromatase Inhibitors By Structure-Guided Design.,Ghosh D, Lo J, Xi J, Hubbell S, Egbuta C, Jiang W, An J, Morton D, Valette D, Griswold J, Davies HM J Med Chem. 2012 Sep 5. PMID:22951074<ref>PMID:22951074</ref>
[[http://www.uniprot.org/uniprot/CP19A_HUMAN CP19A_HUMAN]] Catalyzes the formation of aromatic C18 estrogens from C19 androgens.


==About this Structure==
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
[[4gl7]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4GL7 OCA].
</div>
<div class="pdbe-citations 4gl7" style="background-color:#fffaf0;"></div>


==See Also==
==See Also==
*[[Cytochrome P450|Cytochrome P450]]
*[[Cytochrome P450 3D structures|Cytochrome P450 3D structures]]
 
== References ==
==Reference==
<references/>
<references group="xtra"/><references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Homo sapiens]]
[[Category: Unspecific monooxygenase]]
[[Category: Large Structures]]
[[Category: Ghosh, D.]]
[[Category: Ghosh D]]
[[Category: Cytochrome p450 reductase]]
[[Category: Er membrane]]
[[Category: Estrogen synthetase]]
[[Category: Novel aromatase inhibitor]]
[[Category: Oxidoreductase]]
[[Category: Oxidoreductase-oxidoreductase inhibitor complex]]
Retrieved from "https://proteopedia.org/4gl7"