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2zz9

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Revision as of 07:20, 18 October 2018

Structure of aquaporin-4 S180D mutant at 2.8 A resolution by electron crystallography

Structural highlights

2zz9 is a 1 chain structure with sequence from Buffalo rat. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Related:	2d57
Gene:	Aqp4 (Buffalo rat)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[AQP4_RAT] Forms a water-specific channel. Osmoreceptor which regulates body water balance and mediates water flow within the central nervous system. It is expressed predominantly in the ependymal cell lining the aqueductal system and over the space of the brain in contact with the subarachnoid space, as cerebrospinal fluid fills these structures it may facilitate water balance between brain parenchyma and the fluid compartment. In the plasma membranes of the neurons of the paraventricular and supraoptic nuclei, it may mediate rapid changes in cell volume in response to local shifts in extracellular osmolarity.

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

Members of the aquaporin (AQP) family are expressed in almost every organism, including 13 homologues in humans. Based on the electron crystallographic structure of AQP1, the hydrogen-bond isolation mechanism was proposed to explain why AQPs are impermeable to protons despite their very fast water conduction. The mechanism by which AQPs exclude protons remained controversial, however. Here we present the structure of AQP4 at 2.8 A resolution obtained by electron crystallography of double-layered two-dimensional crystals. The resolution has been improved from the previous 3.2 A, with accompanying improvement in data quality resulting in the ability to identify individual water molecules. Our structure of AQP4, the predominant water channel in the brain, reveals eight water molecules in the channel. The arrangement of the waters provides support for the hydrogen-bond isolation mechanism. Our AQP4 structure also visualizes five lipids, showing that direct interactions of the extracellular surface of AQP4 with three lipids in the adjoining membrane help stabilize the membrane junction.

Mechanism of aquaporin-4's fast and highly selective water conduction and proton exclusion.,Tani K, Mitsuma T, Hiroaki Y, Kamegawa A, Nishikawa K, Tanimura Y, Fujiyoshi Y J Mol Biol. 2009 Jun 19;389(4):694-706. Epub 2009 May 3. PMID:19406128^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Tani K, Mitsuma T, Hiroaki Y, Kamegawa A, Nishikawa K, Tanimura Y, Fujiyoshi Y. Mechanism of aquaporin-4's fast and highly selective water conduction and proton exclusion. J Mol Biol. 2009 Jun 19;389(4):694-706. Epub 2009 May 3. PMID:19406128 doi:10.1016/j.jmb.2009.04.049

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 See Also
6 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/2zz9"

@@ Line 1: / Line 1: @@
 ==Structure of aquaporin-4 S180D mutant at 2.8 A resolution by electron crystallography==
 <StructureSection load='2zz9' size='340' side='right' caption='[[2zz9]], [[Resolution|resolution]] 2.80&Aring;' scene=''>
@@ Line 6: / Line 7: @@
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2d57|2d57]]</td></tr>
 <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">Aqp4 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10116 Buffalo rat])</td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2zz9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2zz9 OCA], [http://pdbe.org/2zz9 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2zz9 RCSB], [http://www.ebi.ac.uk/pdbsum/2zz9 PDBsum]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2zz9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2zz9 OCA], [http://pdbe.org/2zz9 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2zz9 RCSB], [http://www.ebi.ac.uk/pdbsum/2zz9 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2zz9 ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 14: / Line 15: @@
 Check<jmol>
   <jmolCheckbox>
-    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/zz/2zz9_consurf.spt"</scriptWhenChecked>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/zz/2zz9_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>

2zz9

From Proteopedia

Revision as of 07:20, 18 October 2018

Structure of aquaporin-4 S180D mutant at 2.8 A resolution by electron crystallography

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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