1y50

From Proteopedia

(Difference between revisions)

Revision as of 07:33, 18 April 2018

X-ray crystal structure of Bacillus stearothermophilus Histidine phosphocarrier protein (Hpr) F29W mutant domain_swapped dimer

Structural highlights

1y50 is a 1 chain structure with sequence from Atcc 12980. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Related:	1y4y
Gene:	ptsH (ATCC 12980)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[PTHP_GEOSE] General (non sugar-specific) component of the phosphoenolpyruvate-dependent sugar phosphotransferase system (sugar PTS). This major carbohydrate active-transport system catalyzes the phosphorylation of incoming sugar substrates concomitantly with their translocation across the cell membrane. The phosphoryl group from phosphoenolpyruvate (PEP) is transferred to the phosphoryl carrier protein HPr by enzyme I. Phospho-HPr then transfers it to the permease (enzymes II/III). P-Ser-HPr interacts with the catabolite control protein A (CcpA), forming a complex that binds to DNA at the catabolite response elements cre, operator sites preceding a large number of catabolite-regulated genes. Thus, P-Ser-HPr is a corepressor in carbon catabolite repression (CCR), a mechanism that allows bacteria to coordinate and optimize the utilization of available carbon sources. P-Ser-HPr also plays a role in inducer exclusion, in which it probably interacts with several non-PTS permeases and inhibits their transport activity (By similarity).

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 study of proteins from extremophilic organisms continues to generate interest in the field of protein folding because paradigms explaining the enhanced stability of these proteins still elude us and such studies have the potential to further our knowledge of the forces stabilizing proteins. We have undertaken such a study with our model protein HPr from a mesophile, Bacillus subtilis, and a thermophile, Bacillus stearothermophilus. We report here the high-resolution structures of the wild-type HPr protein from the thermophile and a variant, F29W. The variant proved to crystallize in two forms: a monomeric form with a structure very similar to the wild-type protein as well as a domain-swapped dimer. Interestingly, the structure of the domain-swapped dimer for HPr is very different from that observed for a homologous protein, Crh, from B.subtilis. The existence of a domain-swapped dimer has implications for amyloid formation and is consistent with recent results showing that the HPr proteins can form amyloid fibrils. We also characterized the conformational stability of the thermophilic HPr proteins using thermal and solvent denaturation methods and have used the high-resolution structures in an attempt to explain the differences in stability between the different HPr proteins. Finally, we present a detailed analysis of the solution properties of the HPr proteins using a variety of biochemical and biophysical methods.

The HPr proteins from the thermophile Bacillus stearothermophilus can form domain-swapped dimers.,Sridharan S, Razvi A, Scholtz JM, Sacchettini JC J Mol Biol. 2005 Feb 25;346(3):919-31. Epub 2004 Dec 23. PMID:15713472^[1]

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

References

↑ Sridharan S, Razvi A, Scholtz JM, Sacchettini JC. The HPr proteins from the thermophile Bacillus stearothermophilus can form domain-swapped dimers. J Mol Biol. 2005 Feb 25;346(3):919-31. Epub 2004 Dec 23. PMID:15713472 doi:10.1016/j.jmb.2004.12.008

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/1y50"

@@ Line 1: / Line 1: @@
 ==X-ray crystal structure of Bacillus stearothermophilus Histidine phosphocarrier protein (Hpr) F29W mutant domain_swapped dimer==
 <StructureSection load='1y50' size='340' side='right' caption='[[1y50]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
@@ Line 6: / Line 7: @@
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1y4y|1y4y]]</td></tr>
 <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">ptsH ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1422 ATCC 12980])</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=1y50 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1y50 OCA], [http://pdbe.org/1y50 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1y50 RCSB], [http://www.ebi.ac.uk/pdbsum/1y50 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=1y50 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1y50 OCA], [http://pdbe.org/1y50 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1y50 RCSB], [http://www.ebi.ac.uk/pdbsum/1y50 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1y50 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/y5/1y50_consurf.spt"</scriptWhenChecked>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/y5/1y50_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>
@@ Line 31: / Line 32: @@
 ==See Also==
-*[[Phosphocarrier protein HPr|Phosphocarrier protein HPr]]
+*[[Phosphocarrier protein|Phosphocarrier protein]]
 == References ==
 <references/>

1y50

From Proteopedia

Revision as of 07:33, 18 April 2018

X-ray crystal structure of Bacillus stearothermophilus Histidine phosphocarrier protein (Hpr) F29W mutant domain_swapped dimer

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox