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Testosterone Replacement, Low T, HCG, & Beyond
Testosterone and Men's Health Articles
The Dynamics of Allosteric Binding of Estradiol to SHBG
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<blockquote data-quote="madman" data-source="post: 199557" data-attributes="member: 13851"><p><strong>Figure 3. Trajectories of residues within the ligand-binding pockets (LBP1 and LBP2, respectively) of the first and second monomers show conformational coupling between the two SHBG monomers. The plots depict the temporal evolution of trajectories over 5µs of the three structures: SHBG:0E2 – unliganded SHBG dimer (Panel 3A); SHBG:1E2 – a singly-bound state in which only the first monomer is bound to estradiol (Panel 3B); and SHBG:2E2 – a doubly-bound state in which the second monomer also is occupied by estradiol (Panel 3C). Blue color represents monomer 1 (LBP1); red color represents monomer 2 (LBP2). A comparison of the trajectories in panels 3A and 3B shows that the binding of estradiol to the LBP of the first monomer changes the population of conformational states not only in monomer 1 but also in monomer 2, providing evidence of the allosteric interaction between the monomers. Panel 3C: The subsequent binding of the second estradiol to the LBP of the second monomer in the doubly-bound state alters the conformational state of the LBP of the second monomer but also of the first previously occupied LBP of the first monomer, providing further evidence of the bidirectional inter-monomeric allostery.</strong></p><p>[ATTACH=full]13801[/ATTACH]</p></blockquote><p></p>
[QUOTE="madman, post: 199557, member: 13851"] [B]Figure 3. Trajectories of residues within the ligand-binding pockets (LBP1 and LBP2, respectively) of the first and second monomers show conformational coupling between the two SHBG monomers. The plots depict the temporal evolution of trajectories over 5µs of the three structures: SHBG:0E2 – unliganded SHBG dimer (Panel 3A); SHBG:1E2 – a singly-bound state in which only the first monomer is bound to estradiol (Panel 3B); and SHBG:2E2 – a doubly-bound state in which the second monomer also is occupied by estradiol (Panel 3C). Blue color represents monomer 1 (LBP1); red color represents monomer 2 (LBP2). A comparison of the trajectories in panels 3A and 3B shows that the binding of estradiol to the LBP of the first monomer changes the population of conformational states not only in monomer 1 but also in monomer 2, providing evidence of the allosteric interaction between the monomers. Panel 3C: The subsequent binding of the second estradiol to the LBP of the second monomer in the doubly-bound state alters the conformational state of the LBP of the second monomer but also of the first previously occupied LBP of the first monomer, providing further evidence of the bidirectional inter-monomeric allostery.[/B] [ATTACH type="full"]13801[/ATTACH] [/QUOTE]
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Testosterone Replacement, Low T, HCG, & Beyond
Testosterone and Men's Health Articles
The Dynamics of Allosteric Binding of Estradiol to SHBG
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