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1brr

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[[Image:1brr.gif|left|200px]]
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{{Seed}}
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[[Image:1brr.png|left|200px]]
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{{STRUCTURE_1brr| PDB=1brr | SCENE= }}
{{STRUCTURE_1brr| PDB=1brr | SCENE= }}
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'''X-RAY STRUCTURE OF THE BACTERIORHODOPSIN TRIMER/LIPID COMPLEX'''
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===X-RAY STRUCTURE OF THE BACTERIORHODOPSIN TRIMER/LIPID COMPLEX===
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==Overview==
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Heterogenous nucleation on small molecule crystals causes a monoclinic crystal form of bacteriorhodopsin (BR) in which trimers of this membrane protein pack differently than in native purple membranes. Analysis of single crystals by nano-electrospray ionization-mass spectrometry demonstrated a preservation of the purple membrane lipid composition in these BR crystals. The 2.9-A x-ray structure shows a lipid-mediated stabilization of BR trimers where the glycolipid S-TGA-1 binds into the central compartment of BR trimers. The BR trimer/lipid complex provides an example of local membrane thinning as the lipid head-group boundary of the central lipid patch is shifted by 5 A toward the membrane center. Nonbiased electron density maps reveal structural differences to previously reported BR structures, especially for the cytosolic EF loop and the proton exit pathway. The terminal proton release complex now comprises an E194-E204 dyad as a diffuse proton buffer.
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The line below this paragraph, {{ABSTRACT_PUBMED_9751724}}, adds the Publication Abstract to the page
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(as it appears on PubMed at http://www.pubmed.gov), where 9751724 is the PubMed ID number.
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{{ABSTRACT_PUBMED_9751724}}
==About this Structure==
==About this Structure==
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[[Category: Proton pump]]
[[Category: Proton pump]]
[[Category: Retinal protein]]
[[Category: Retinal protein]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 11:52:32 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jun 30 19:37:20 2008''

Revision as of 16:37, 30 June 2008

Image:1brr.png

Template:STRUCTURE 1brr

X-RAY STRUCTURE OF THE BACTERIORHODOPSIN TRIMER/LIPID COMPLEX

Template:ABSTRACT PUBMED 9751724

About this Structure

1BRR is a Single protein structure of sequence from Halobacterium salinarum. Full crystallographic information is available from OCA.

Reference

Lipid patches in membrane protein oligomers: crystal structure of the bacteriorhodopsin-lipid complex., Essen L, Siegert R, Lehmann WD, Oesterhelt D, Proc Natl Acad Sci U S A. 1998 Sep 29;95(20):11673-8. PMID:9751724

Page seeded by OCA on Mon Jun 30 19:37:20 2008

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