This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.

Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.

2wy2

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Revision as of 10:11, 30 January 2019

Warning: this is a large structure, and loading might take a long time or not happen at all.

NMR structure of the IIAchitobiose-IIBchitobiose phosphoryl transition state complex of the N,N'-diacetylchitoboise brance of the E. coli phosphotransferase system.

Structural highlights

2wy2 is a 4 chain structure with sequence from "bacillus_coli"_migula_1895 "bacillus coli" migula 1895. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Related:	2wwv, 1wcr
Activity:	Protein-N(pi)-phosphohistidine--sugar phosphotransferase, with EC number 2.7.1.69
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Warning: this is a large structure, and loading might take a long time or not happen at all.

Function

[PTQA_ECOLI] The phosphoenolpyruvate-dependent sugar phosphotransferase system (PTS), a major carbohydrate active -transport system, catalyzes the phosphorylation of incoming sugar substrates concomitant with their translocation across the cell membrane. This system is involved in N,N'-diacetylchitobiose transport.^[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 solution structure of the IIA-IIB complex of the N,N'-diacetylchitobiose (Chb) transporter of the Escherichia coli phosphotransferase system has been solved by NMR. The active site His-89 of IIA(Chb) was mutated to Glu to mimic the phosphorylated state and the active site Cys-10 of IIB(Chb) was substituted by serine to prevent intermolecular disulfide bond formation. Binding is weak with a K(D) of approximately 1.3 mm. The two complementary interaction surfaces are largely hydrophobic, with the protruding active site loop (residues 9-16) of IIB(Chb) buried deep within the active site cleft formed at the interface of two adjacent subunits of the IIA(Chb) trimer. The central hydrophobic portion of the interface is surrounded by a ring of polar and charged residues that provide a relatively small number of electrostatic intermolecular interactions that serve to correctly align the two proteins. The conformation of the active site loop in unphosphorylated IIB(Chb) is inconsistent with the formation of a phosphoryl transition state intermediate because of steric hindrance, especially from the methyl group of Ala-12 of IIB(Chb). Phosphorylation of IIB(Chb) is accompanied by a conformational change within the active site loop such that its path from residues 11-13 follows a mirror-like image relative to that in the unphosphorylated state. This involves a transition of the phi/psi angles of Gly-13 from the right to left alpha-helical region, as well as smaller changes in the backbone torsion angles of Ala-12 and Met-14. The resulting active site conformation is fully compatible with the formation of the His-89-P-Cys-10 phosphoryl transition state without necessitating any change in relative translation or orientation of the two proteins within the complex.

Solution structure of the IIAChitobiose-IIBChitobiose complex of the N,N'-diacetylchitobiose branch of the Escherichia coli phosphotransferase system.,Jung YS, Cai M, Clore GM J Biol Chem. 2010 Feb 5;285(6):4173-84. Epub 2009 Dec 3. PMID:19959833^[2]

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

References

↑ Keyhani NO, Wang LX, Lee YC, Roseman S. The chitin disaccharide, N,N'-diacetylchitobiose, is catabolized by Escherichia coli and is transported/phosphorylated by the phosphoenolpyruvate:glycose phosphotransferase system. J Biol Chem. 2000 Oct 20;275(42):33084-90. PMID:10913117 doi:http://dx.doi.org/10.1074/jbc.M001043200
↑ Jung YS, Cai M, Clore GM. Solution structure of the IIAChitobiose-IIBChitobiose complex of the N,N'-diacetylchitobiose branch of the Escherichia coli phosphotransferase system. J Biol Chem. 2010 Feb 5;285(6):4173-84. Epub 2009 Dec 3. PMID:19959833 doi:M109.080937

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/2wy2"

@@ Line 3: / Line 3: @@
 <StructureSection load='2wy2' size='340' side='right' caption='[[2wy2]], [[NMR_Ensembles_of_Models | 64 NMR models]]' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[2wy2]] is a 4 chain structure. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2WY2 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2WY2 FirstGlance]. <br>
+<table><tr><td colspan='2'>[[2wy2]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacillus_coli"_migula_1895 "bacillus coli" migula 1895]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2WY2 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2WY2 FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=PO3:PHOSPHITE+ION'>PO3</scene></td></tr>
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2wwv|2wwv]], [[1wcr|1wcr]]</td></tr>
@@ Line 16: / Line 16: @@
 Check<jmol>
   <jmolCheckbox>
-    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/wy/2wy2_consurf.spt"</scriptWhenChecked>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/wy/2wy2_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>
@@ Line 35: / Line 35: @@
 __TOC__
 </StructureSection>
+[[Category: Bacillus coli migula 1895]]
 [[Category: Cai, M]]
 [[Category: Clore, G M]]

2wy2

From Proteopedia

Revision as of 10:11, 30 January 2019

NMR structure of the IIAchitobiose-IIBchitobiose phosphoryl transition state complex of the N,N'-diacetylchitoboise brance of the E. coli phosphotransferase system.

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox