User:Wayne Decatur/Haloarcula Large Ribosomal Subunit With Azithromycin

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[http://en.wikipedia.org/wiki/Azithromycin Azithromycin] is a 15-membered macrolide [http://en.wikipedia.org/wiki/Antibiotic antibiotic] of the azalide subclass. The structure of this clinically important antibiotic has been solved bound to the ''Haloarcula marismortui'' large ribosomal subunit revealing its mode of inhibiting protein synthesis<ref>PMID: 12150912</ref><ref>PMID: 15851032</ref>.
[http://en.wikipedia.org/wiki/Azithromycin Azithromycin] is a 15-membered macrolide [http://en.wikipedia.org/wiki/Antibiotic antibiotic] of the azalide subclass. The structure of this clinically important antibiotic has been solved bound to the ''Haloarcula marismortui'' large ribosomal subunit revealing its mode of inhibiting protein synthesis<ref>PMID: 12150912</ref><ref>PMID: 15851032</ref>.
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The basic details of the [[User:Wayne Decatur/Haloarcula Large Ribosomal Subunit|''Haloarcula marismortui'' large ribosomal]] subunit are described in '''[[User:Wayne Decatur/Haloarcula Large Ribosomal Subunit|its own entry]]''' while the structure of azithromycin (zithromax) and its interaction with the [[ribosome]] are shown below on this page.
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The basic details of the [[User:Wayne Decatur/Haloarcula Large Ribosomal Subunit|''Haloarcula marismortui'' large ribosomal]] subunit are described in '''[[Large Ribosomal Subunit of Haloarcula|its own entry]]''' while the structure of azithromycin (zithromax) and its interaction with the [[ribosome]] are shown below on this page.
==Mechanism of action==
==Mechanism of action==
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<scene name='User:Wayne_Decatur/Sandbox_Haloarcula_Large_Ribosomal_Subunit_With_Azithromycin/1m1kazo/4'>Azithromycin sits in the tunnel where it would occlude the nascent polypeptide chain from transiting through the subunit</scene>.
<scene name='User:Wayne_Decatur/Sandbox_Haloarcula_Large_Ribosomal_Subunit_With_Azithromycin/1m1kazo/4'>Azithromycin sits in the tunnel where it would occlude the nascent polypeptide chain from transiting through the subunit</scene>.
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'''Summary: Azithromycin, like other macrolides, binds in [[User:Wayne Decatur/Haloarcula Large Ribosomal Subunit#Polypeptide Exit Tunnel:|the polypeptide exit tunnel]] near its start [[User:Wayne Decatur/Haloarcula Large Ribosomal Subunit#Polypeptide Exit Tunnel:|the polypeptide exit tunnel]] inhibiting protein synthesis by blocking the progression of nascent polypeptides through the tunnel.''' '''[[User:Wayne Decatur/Haloarcula Large Ribosomal Subunit#Polypeptide Exit Tunnel:|The polypeptide exit tunnel]]''' is described '''[[User:Wayne Decatur/Haloarcula Large Ribosomal Subunit#Polypeptide Exit Tunnel:|here]]'''.
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'''Summary: Azithromycin, like other macrolides, binds in [[Large Ribosomal Subunit of Haloarcula#Polypeptide Exit Tunnel:|the polypeptide exit tunnel]] near its start [[Large Ribosomal Subunit of Haloarcula#Polypeptide Exit Tunnel:|the polypeptide exit tunnel]] inhibiting protein synthesis by blocking the progression of nascent polypeptides through the tunnel.''' '''[[Large Ribosomal Subunit of Haloarcula#Polypeptide Exit Tunnel:|The polypeptide exit tunnel]]''' is described '''[[Large Ribosomal Subunit of Haloarcula#Polypeptide Exit Tunnel:|here]]'''.
==About this Structure==
==About this Structure==
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[[1m1k]] is a 30 chains structure of sequences from [http://en.wikipedia.org/wiki/Haloarcula_marismortui Haloarcula marismortui]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1M1K OCA]. A version of [[1m1k]] optimized for use online as described [[User:Wayne Decatur/Interactions between Antibiotics and the Ribosome|here]] is used on this page. You may wish to examine the [[User:Wayne Decatur/Haloarcula Large Ribosomal Subunit|basics of the subunit]].
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[[1m1k]] is a 30 chains structure of sequences from [http://en.wikipedia.org/wiki/Haloarcula_marismortui Haloarcula marismortui]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1M1K OCA]. A version of [[1m1k]] optimized for use online as described [[User:Wayne Decatur/Interactions between Antibiotics and the Ribosome|here]] is used on this page. You may wish to examine the [[Large Ribosomal Subunit of Haloarcula|basics of the subunit]].
==Reference for the Structure==
==Reference for the Structure==
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==Related Structures==
==Related Structures==
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*[[User:Wayne Decatur/Haloarcula Large Ribosomal Subunit|Haloarcula Large Ribosomal Subunit]]
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*[[Large Ribosomal Subunit of Haloarcula|Haloarcula Large Ribosomal Subunit]]
*[[User:Wayne Decatur/Interactions between Antibiotics and the Ribosome|Interactions between Antibiotics and the Ribosome]]
*[[User:Wayne Decatur/Interactions between Antibiotics and the Ribosome|Interactions between Antibiotics and the Ribosome]]
*[[1nwy]] The Large Ribosomal Subunit From ''Deinococcus radiodurans'' complexed with Azithromycin<ref>PMID: 12623020</ref>
*[[1nwy]] The Large Ribosomal Subunit From ''Deinococcus radiodurans'' complexed with Azithromycin<ref>PMID: 12623020</ref>

Revision as of 17:16, 14 May 2010

Azithromycin is a 15-membered macrolide antibiotic of the azalide subclass. The structure of this clinically important antibiotic has been solved bound to the Haloarcula marismortui large ribosomal subunit revealing its mode of inhibiting protein synthesis[1][2].

The basic details of the Haloarcula marismortui large ribosomal subunit are described in its own entry while the structure of azithromycin (zithromax) and its interaction with the ribosome are shown below on this page.

Contents

Mechanism of action

Drag the structure with the mouse to rotate
 
Drag the structure with the mouse to rotate
Azithromycin bound to the Large Ribosomal Subunit (1m1k), resolution 3.2Å ().
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Summary: Azithromycin, like other macrolides, binds in the polypeptide exit tunnel near its start the polypeptide exit tunnel inhibiting protein synthesis by blocking the progression of nascent polypeptides through the tunnel. The polypeptide exit tunnel is described here.

About this Structure

1m1k is a 30 chains structure of sequences from Haloarcula marismortui. Full crystallographic information is available from OCA. A version of 1m1k optimized for use online as described here is used on this page. You may wish to examine the basics of the subunit.

Reference for the Structure

  • Hansen JL, Ippolito JA, Ban N, Nissen P, Moore PB, Steitz TA. The structures of four macrolide antibiotics bound to the large ribosomal subunit. Mol Cell. 2002 Jul;10(1):117-28. PMID:12150912

Related Structures

  • Haloarcula Large Ribosomal Subunit
  • Interactions between Antibiotics and the Ribosome
  • 1nwy The Large Ribosomal Subunit From Deinococcus radiodurans complexed with Azithromycin[3]
  • 1yhq Haloarcula marismortui large ribosomal subunit containing the mutation G2099A (A2058 in E. coli) complexed with Azithromycin - despite the change to the eubacterial-like adenosine at this position azithromycin binds essentially the same way to either Haloarcula subunit[4]
  • 1kd1 The Large Ribosomal Subunit From H. marismortui complexed with the 16-membered macrolide spiramycin[5]
  • 1k9m The Large Ribosomal Subunit From H. marismortui complexed with the 16-membered macrolide Tylosin[6]
  • 1k8a The Large Ribosomal Subunit From H. marismortui complexed with the 16-membered macrolide Carbomycin A[7]

References

  1. ↑ Hansen JL, Ippolito JA, Ban N, Nissen P, Moore PB, Steitz TA. The structures of four macrolide antibiotics bound to the large ribosomal subunit. Mol Cell. 2002 Jul;10(1):117-28. PMID:12150912
  2. ↑ Tu D, Blaha G, Moore PB, Steitz TA. Structures of MLSBK antibiotics bound to mutated large ribosomal subunits provide a structural explanation for resistance. Cell. 2005 Apr 22;121(2):257-70. PMID:15851032 doi:10.1016/j.cell.2005.02.005
  3. ↑ Schlunzen F, Harms JM, Franceschi F, Hansen HA, Bartels H, Zarivach R, Yonath A. Structural basis for the antibiotic activity of ketolides and azalides. Structure. 2003 Mar;11(3):329-38. PMID:12623020
  4. ↑ Tu D, Blaha G, Moore PB, Steitz TA. Structures of MLSBK antibiotics bound to mutated large ribosomal subunits provide a structural explanation for resistance. Cell. 2005 Apr 22;121(2):257-70. PMID:15851032 doi:10.1016/j.cell.2005.02.005
  5. ↑ Hansen JL, Ippolito JA, Ban N, Nissen P, Moore PB, Steitz TA. The structures of four macrolide antibiotics bound to the large ribosomal subunit. Mol Cell. 2002 Jul;10(1):117-28. PMID:12150912
  6. ↑ Hansen JL, Ippolito JA, Ban N, Nissen P, Moore PB, Steitz TA. The structures of four macrolide antibiotics bound to the large ribosomal subunit. Mol Cell. 2002 Jul;10(1):117-28. PMID:12150912
  7. ↑ Hansen JL, Ippolito JA, Ban N, Nissen P, Moore PB, Steitz TA. The structures of four macrolide antibiotics bound to the large ribosomal subunit. Mol Cell. 2002 Jul;10(1):117-28. PMID:12150912

Additional Literature and Resources

  • Steitz TA. Structural insights into the functions of the large ribosomal subunit, a major antibiotic target. Keio J Med. 2008 Mar;57(1):1-14. PMID:18382121
  • Steitz TA. On the structural basis of peptide-bond formation and antibiotic resistance from atomic structures of the large ribosomal subunit. FEBS Lett. 2005 Feb 7;579(4):955-8. PMID:15680981 doi:10.1016/j.febslet.2004.11.053

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Wayne Decatur

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