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1pch

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Revision as of 08:01, 15 February 2018

STRUCTURAL EVIDENCE FOR THE EVOLUTIONARY DIVERGENCE OF MYCOPLASMA FROM GRAM-POSITIVE BACTERIA: THE HISTIDINE-CONTAINING PHOSPHOCARRIER PROTEIN

Structural highlights

1pch is a 1 chain structure with sequence from Atcc 27343. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Gene:	PTSH (ATCC 27343)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[PTHP_MYCCT] 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

BACKGROUND: The three-dimensional structures of histidine-containing phosphocarrier protein (HPr), a member of the phosphoenolpyruvate:sugar phosphotransferase system (PTS), have been determined from Gram-negative and Gram-positive bacteria. The structure of HPr reported here for Mycoplasma capricolum is the first protein structure to be determined for this class of organism. Comparative structural studies with the bacterial proteins highlight sequence-structure correlations relevant to proposals about the evolutionary origin of mycoplasmas. RESULTS: The crystal structure of HPr from M. capricolum has been determined and refined at 1.8 A resolution, revealing the same overall fold as that of other HPrs of known structure. However, mycoplasma HPr resembles HPrs from Gram-positive bacteria more closely than those from Gram-negative bacteria. As in HPrs from Bacillus subtilis and Escherichia coli, the phosphoryl group carrier (His15) forms the N-terminal cap of a helix, but in contrast to the other crystal structures, the side chain of the adjacent Arg17 is conformationally disordered. A sulfate ion interacts with Ser46, a residue known to be phosphorylated in a regulatory manner. CONCLUSIONS: The greater degree of structural similarity of the M. capricolum HPr to HPrs from Gram-positive rather than Gram-negative bacteria is consistent with the proposal that mycoplasma evolved from Gram-positive bacteria. The proposal that no major conformational transition is required for phosphorylation of the active-site histidine is reinforced by comparing the crystal structures with and without an anion in the active site. The conformational disorder of the Arg17 side chain suggests that its guanidinium group does not have to form specific interactions with other protein groups before phosphorylation at His15. The association of a sulfate ion with Ser46 serves as a model for HPr(Ser46-P). As there is no evidence of a conformational change accompanying Ser46 phosphorylation, the inhibitory effect of this event may be attributable to altered surface electrostatics.

Structural evidence for the evolutionary divergence of mycoplasma from gram-positive bacteria: the histidine-containing phosphocarrier protein.,Pieper U, Kapadia G, Zhu PP, Peterkofsky A, Herzberg O Structure. 1995 Aug 15;3(8):781-90. PMID:7582895^[1]

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

References

↑ Pieper U, Kapadia G, Zhu PP, Peterkofsky A, Herzberg O. Structural evidence for the evolutionary divergence of mycoplasma from gram-positive bacteria: the histidine-containing phosphocarrier protein. Structure. 1995 Aug 15;3(8):781-90. PMID:7582895

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/1pch"

Categories: Atcc 27343 | Herzberg, O | Pieper, U | Phosphotransferase

@@ Line 1: / Line 1: @@
 ==STRUCTURAL EVIDENCE FOR THE EVOLUTIONARY DIVERGENCE OF MYCOPLASMA FROM GRAM-POSITIVE BACTERIA: THE HISTIDINE-CONTAINING PHOSPHOCARRIER PROTEIN==
 <StructureSection load='1pch' size='340' side='right' caption='[[1pch]], [[Resolution|resolution]] 1.80&Aring;' scene=''>
@@ Line 5: / Line 6: @@
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></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=2095 ATCC 27343])</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=1pch FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1pch OCA], [http://pdbe.org/1pch PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1pch RCSB], [http://www.ebi.ac.uk/pdbsum/1pch 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=1pch FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1pch OCA], [http://pdbe.org/1pch PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1pch RCSB], [http://www.ebi.ac.uk/pdbsum/1pch PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1pch ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 13: / Line 14: @@
 Check<jmol>
   <jmolCheckbox>
-    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/pc/1pch_consurf.spt"</scriptWhenChecked>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/pc/1pch_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>
   </jmolCheckbox>
-</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/chain_selection.php?pdb_ID=2ata ConSurf].
+</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1pch ConSurf].
 <div style="clear:both"></div>
 <div style="background-color:#fffaf0;">
@@ Line 28: / Line 29: @@
 </div>
 <div class="pdbe-citations 1pch" style="background-color:#fffaf0;"></div>
-==See Also==
-*[[Phosphocarrier protein HPr|Phosphocarrier protein HPr]]
 == References ==
 <references/>

1pch

From Proteopedia

Revision as of 08:01, 15 February 2018

STRUCTURAL EVIDENCE FOR THE EVOLUTIONARY DIVERGENCE OF MYCOPLASMA FROM GRAM-POSITIVE BACTERIA: THE HISTIDINE-CONTAINING PHOSPHOCARRIER PROTEIN

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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