1zcd

From Proteopedia

(Difference between revisions)

Revision as of 09:02, 20 January 2021

Crystal structure of the Na+/H+ antiporter NhaA

Structural highlights

1zcd is a 2 chain structure with sequence from "bacillus_coli"_migula_1895 "bacillus coli" migula 1895. The December 2011 RCSB PDB Molecule of the Month feature on Complex I by David Goodsell is 10.2210/rcsb_pdb/mom_2011_12. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Gene:	nhaA ("Bacillus coli" Migula 1895)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[NHAA_ECOLI] Na(+)/H(+) antiporter that extrudes sodium in exchange for external protons. Catalyzes the exchange of 2 H(+) per Na(+). Can mediate sodium uptake when a transmembrane pH gradient is applied. Active at alkaline pH. Activity is strongly down-regulated below pH 6.5.^[1]

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

The control by Na+/H+ antiporters of sodium/proton concentration and cell volume is crucial for the viability of all cells. Adaptation to high salinity and/or extreme pH in plants and bacteria or in human heart muscles requires the action of Na+/H+ antiporters. Their activity is tightly controlled by pH. Here we present the crystal structure of pH-downregulated NhaA, the main antiporter of Escherichia coli and many enterobacteria. A negatively charged ion funnel opens to the cytoplasm and ends in the middle of the membrane at the putative ion-binding site. There, a unique assembly of two pairs of short helices connected by crossed, extended chains creates a balanced electrostatic environment. We propose that the binding of charged substrates causes an electric imbalance, inducing movements, that permit a rapid alternating-access mechanism. This ion-exchange machinery is regulated by a conformational change elicited by a pH signal perceived at the entry to the cytoplasmic funnel.

Structure of a Na+/H+ antiporter and insights into mechanism of action and regulation by pH.,Hunte C, Screpanti E, Venturi M, Rimon A, Padan E, Michel H Nature. 2005 Jun 30;435(7046):1197-202. PMID:15988517^[2]

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

References

↑ Taglicht D, Padan E, Schuldiner S. Overproduction and purification of a functional Na+/H+ antiporter coded by nhaA (ant) from Escherichia coli. J Biol Chem. 1991 Jun 15;266(17):11289-94. PMID:1645730
↑ Hunte C, Screpanti E, Venturi M, Rimon A, Padan E, Michel H. Structure of a Na+/H+ antiporter and insights into mechanism of action and regulation by pH. Nature. 2005 Jun 30;435(7046):1197-202. PMID:15988517 doi:10.1038/nature03692

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1zcd"

@@ Line 1: / Line 1: @@
 ==Crystal structure of the Na+/H+ antiporter NhaA==
-<StructureSection load='1zcd' size='340' side='right' caption='[[1zcd]], [[Resolution|resolution]] 3.45&Aring;' scene=''>
+<StructureSection load='1zcd' size='340' side='right'caption='[[1zcd]], [[Resolution|resolution]] 3.45&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[1zcd]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacillus_coli"_migula_1895 "bacillus coli" migula 1895]. The December 2011 RCSB PDB [http://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/index.html Molecule of the Month] feature on ''Complex I''  by David Goodsell is [http://dx.doi.org/10.2210/rcsb_pdb/mom_2011_12 10.2210/rcsb_pdb/mom_2011_12]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1ZCD OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1ZCD FirstGlance]. <br>
+<table><tr><td colspan='2'>[[1zcd]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacillus_coli"_migula_1895 "bacillus coli" migula 1895]. The December 2011 RCSB PDB [http://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/index.html Molecule of the Month] feature on ''Complex I''  by David Goodsell is [http://dx.doi.org/10.2210/rcsb_pdb/mom_2011_12 10.2210/rcsb_pdb/mom_2011_12]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1ZCD OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=1ZCD FirstGlance]. <br>
 </td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">nhaA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 "Bacillus coli" Migula 1895])</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=1zcd FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1zcd OCA], [http://pdbe.org/1zcd PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1zcd RCSB], [http://www.ebi.ac.uk/pdbsum/1zcd PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1zcd ProSAT]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=1zcd FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1zcd OCA], [http://pdbe.org/1zcd PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1zcd RCSB], [http://www.ebi.ac.uk/pdbsum/1zcd PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1zcd ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 34: / Line 34: @@
 [[Category: Bacillus coli migula 1895]]
 [[Category: Complex I]]
+[[Category: Large Structures]]
 [[Category: RCSB PDB Molecule of the Month]]
 [[Category: Hunte, C]]

1zcd

From Proteopedia

Revision as of 09:02, 20 January 2021

Crystal structure of the Na+/H+ antiporter NhaA

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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