1on1
From Proteopedia
(New page: 200px<br /><applet load="1on1" size="450" color="white" frame="true" align="right" spinBox="true" caption="1on1, resolution 1.75Å" /> '''Bacillus Subtilis Ma...) |
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| - | [[Image:1on1.jpg|left|200px]]<br /><applet load="1on1" size=" | + | [[Image:1on1.jpg|left|200px]]<br /><applet load="1on1" size="350" color="white" frame="true" align="right" spinBox="true" |
caption="1on1, resolution 1.75Å" /> | caption="1on1, resolution 1.75Å" /> | ||
'''Bacillus Subtilis Manganese Transport Regulator (Mntr) Bound To Manganese, AB Conformation.'''<br /> | '''Bacillus Subtilis Manganese Transport Regulator (Mntr) Bound To Manganese, AB Conformation.'''<br /> | ||
==Overview== | ==Overview== | ||
| - | The Bacillus subtilis manganese transport regulator, MntR, binds Mn2+ as | + | The Bacillus subtilis manganese transport regulator, MntR, binds Mn2+ as an effector and is a repressor of transporters that import manganese. A member of the diphtheria toxin repressor (DtxR) family of metalloregulatory proteins, MntR exhibits selectivity for Mn2+ over Fe2+. Replacement of a metal-binding residue, Asp8, with methionine (D8M) relaxes this specificity. We report here the X-ray crystal structures of wild-type MntR and the D8M mutant bound to manganese with 1.75 A and 1.61 A resolution, respectively. The 142-residue MntR homodimer has substantial structural similarity to the 226-residue DtxR but lacks the C-terminal SH3-like domain of DtxR. The metal-binding pockets of MntR and DtxR are substantially different. The cation-to-cation distance between the two manganese ions bound by MntR is 3.3 A, whereas that between the metal ions bound by DtxR is 9 A. D8M binds only a single Mn2+ per monomer, owing to alteration of the metal-binding site. The sole retained metal site adopts pseudo-hexacoordinate geometry rather than the pseudo-heptacoordinate geometry of the MntR metal sites. |
==About this Structure== | ==About this Structure== | ||
| - | 1ON1 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Bacillus_subtilis Bacillus subtilis] with MN as [http://en.wikipedia.org/wiki/ligand ligand]. Full crystallographic information is available from [http:// | + | 1ON1 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Bacillus_subtilis Bacillus subtilis] with <scene name='pdbligand=MN:'>MN</scene> as [http://en.wikipedia.org/wiki/ligand ligand]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1ON1 OCA]. |
==Reference== | ==Reference== | ||
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[[Category: Bacillus subtilis]] | [[Category: Bacillus subtilis]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
| - | [[Category: Brennan, R | + | [[Category: Brennan, R G.]] |
[[Category: Glasfeld, A.]] | [[Category: Glasfeld, A.]] | ||
[[Category: Guedon, E.]] | [[Category: Guedon, E.]] | ||
| - | [[Category: Helmann, J | + | [[Category: Helmann, J D.]] |
[[Category: MN]] | [[Category: MN]] | ||
[[Category: dna-binding protein]] | [[Category: dna-binding protein]] | ||
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[[Category: metalloregulatory protein]] | [[Category: metalloregulatory protein]] | ||
| - | ''Page seeded by [http:// | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 14:19:28 2008'' |
Revision as of 12:19, 21 February 2008
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Bacillus Subtilis Manganese Transport Regulator (Mntr) Bound To Manganese, AB Conformation.
Overview
The Bacillus subtilis manganese transport regulator, MntR, binds Mn2+ as an effector and is a repressor of transporters that import manganese. A member of the diphtheria toxin repressor (DtxR) family of metalloregulatory proteins, MntR exhibits selectivity for Mn2+ over Fe2+. Replacement of a metal-binding residue, Asp8, with methionine (D8M) relaxes this specificity. We report here the X-ray crystal structures of wild-type MntR and the D8M mutant bound to manganese with 1.75 A and 1.61 A resolution, respectively. The 142-residue MntR homodimer has substantial structural similarity to the 226-residue DtxR but lacks the C-terminal SH3-like domain of DtxR. The metal-binding pockets of MntR and DtxR are substantially different. The cation-to-cation distance between the two manganese ions bound by MntR is 3.3 A, whereas that between the metal ions bound by DtxR is 9 A. D8M binds only a single Mn2+ per monomer, owing to alteration of the metal-binding site. The sole retained metal site adopts pseudo-hexacoordinate geometry rather than the pseudo-heptacoordinate geometry of the MntR metal sites.
About this Structure
1ON1 is a Single protein structure of sequence from Bacillus subtilis with as ligand. Full crystallographic information is available from OCA.
Reference
Structure of the manganese-bound manganese transport regulator of Bacillus subtilis., Glasfeld A, Guedon E, Helmann JD, Brennan RG, Nat Struct Biol. 2003 Aug;10(8):652-7. PMID:12847518
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