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1zym

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Revision as of 09:04, 2 May 2018

AMINO TERMINAL DOMAIN OF ENZYME I FROM ESCHERICHIA COLI

Structural highlights

1zym is a 2 chain structure with sequence from "bacillus_coli"_migula_1895 "bacillus coli" migula 1895. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Activity:	Phosphoenolpyruvate--protein phosphotransferase, with EC number 2.7.3.9
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[PT1_ECOLI] 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. Enzyme I transfers the phosphoryl group from phosphoenolpyruvate (PEP) to the phosphoryl carrier protein (HPr).^[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

BACKGROUND: The bacterial phosphoenolpyruvate (PEP): sugar phosphotransferase system (PTS) transports exogenous hexose sugars through the membrane and tightly couples transport with phosphoryl transfer from PEP to the sugar via several phosphoprotein intermediates. The phosphate group is first transferred to enzyme I, second to the histidine-containing phosphocarrier protein HPr, and then to one of a number of sugar-specific enzymes II. The structures of several HPrs and enzymes IIA are known. Here we report the structure of the N-terminal half of enzyme I from Escherichia coli (EIN). RESULTS: The crystal structure of EIN (MW approximately 30 kDa) has been determined and refined at 2.5 A resolution. It has two distinct structural subdomains; one contains four alpha helices arranged as two hairpins in a claw-like conformation. The other consists of a beta sandwich containing a three-stranded antiparallel beta sheet and a four-stranded parallel beta sheet, together with three short alpha helices. Plausible models of complexes between EIN and HPr can be made without assuming major structural changes in either protein. CONCLUSIONS: The alpha/beta subdomain of EIN is topologically similar to the phosphohistidine domain of the enzyme pyruvate phosphate dikinase, which is phosphorylated by PEP on a histidyl residue but does not interact with HPr. It is therefore likely that features of this subdomain are important in the autophosphorylation of enzyme I. The helical subdomain of EIN is not found in pyruvate phosphate dikinase; this subdomain is therefore more likely to be involved in phosphoryl transfer to HPr.

The first step in sugar transport: crystal structure of the amino terminal domain of enzyme I of the E. coli PEP: sugar phosphotransferase system and a model of the phosphotransfer complex with HPr.,Liao DI, Silverton E, Seok YJ, Lee BR, Peterkofsky A, Davies DR Structure. 1996 Jul 15;4(7):861-72. PMID:8805571^[2]

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

References

↑ Powell BS, Court DL, Inada T, Nakamura Y, Michotey V, Cui X, Reizer A, Saier MH Jr, Reizer J. Novel proteins of the phosphotransferase system encoded within the rpoN operon of Escherichia coli. Enzyme IIANtr affects growth on organic nitrogen and the conditional lethality of an erats mutant. J Biol Chem. 1995 Mar 3;270(9):4822-39. PMID:7876255
↑ Liao DI, Silverton E, Seok YJ, Lee BR, Peterkofsky A, Davies DR. The first step in sugar transport: crystal structure of the amino terminal domain of enzyme I of the E. coli PEP: sugar phosphotransferase system and a model of the phosphotransfer complex with HPr. Structure. 1996 Jul 15;4(7):861-72. PMID:8805571

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/1zym"

Categories: Bacillus coli migula 1895 | Phosphoenolpyruvate--protein phosphotransferase | Davies, D R | Liao, D I | Phosphotransferase

@@ Line 1: / Line 1: @@
 ==AMINO TERMINAL DOMAIN OF ENZYME I FROM ESCHERICHIA COLI==
 <StructureSection load='1zym' size='340' side='right' caption='[[1zym]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
@@ Line 4: / Line 5: @@
 <table><tr><td colspan='2'>[[1zym]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacillus_coli"_migula_1895 "bacillus coli" migula 1895]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1ZYM OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1ZYM FirstGlance]. <br>
 </td></tr><tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Phosphoenolpyruvate--protein_phosphotransferase Phosphoenolpyruvate--protein phosphotransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.3.9 2.7.3.9] </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=1zym FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1zym OCA], [http://pdbe.org/1zym PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1zym RCSB], [http://www.ebi.ac.uk/pdbsum/1zym 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=1zym FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1zym OCA], [http://pdbe.org/1zym PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1zym RCSB], [http://www.ebi.ac.uk/pdbsum/1zym PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1zym ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 12: / Line 13: @@
 Check<jmol>
   <jmolCheckbox>
-    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/zy/1zym_consurf.spt"</scriptWhenChecked>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/zy/1zym_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>

1zym

From Proteopedia

Revision as of 09:04, 2 May 2018

AMINO TERMINAL DOMAIN OF ENZYME I FROM ESCHERICHIA COLI

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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