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.

1r62

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Revision as of 08:10, 28 February 2018

Crystal structure of the C-terminal Domain of the Two-Component System Transmitter Protein NRII (NtrB)

Structural highlights

1r62 is a 1 chain structure with sequence from Ecoli. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Gene:	NTRB (ECOLI)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[NTRB_ECOLI] NtrB acts as a signal transducer which responds to the nitrogen level of cell and modulates the activity of NtrC. In nitrogen limitation NtrB activates NtrC by phosphorylating it, while in nitrogen excess NtrC is dephosphorylated and consequently inactivated by NtrB.

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 kinase/phosphatase nitrogen regulator II (NRII, NtrB) is a member of the transmitter protein family of conserved two-component signal transduction systems. The kinase activity of NRII brings about the phosphorylation of the transcription factor nitrogen regulator I (NRI, NtrC), causing the activation of Ntr gene transcription. The phosphatase activity of NRII results in the inactivation of NRI-P. The activities of NRII are regulated by the signal transduction protein encoded by glnB, PII protein, which upon binding to NRII inhibits the kinase and activates the phosphatase activity. The C-terminal ATP-binding domain of NRII is required for both the kinase and phosphatase activities and contains the PII binding site. Here, we present the crystal structure of the C-terminal domain of a mutant form of NRII, NRII-Y302N, at 1.6 A resolution and compare this structure to the analogous domains of other two-component system transmitter proteins. While the C-terminal domain of NRII shares the general tertiary structure seen in CheA, PhoQ, and EnvZ transmitter proteins, it contains a distinct beta-hairpin projection that is absent in these related proteins. This projection is near the site of a well-characterized mutation that reduces the binding of PII and near other less-characterized mutations that affect the phosphatase activity of NRII. Sequence alignment suggests that the beta-hairpin projection is present in NRII proteins from various organisms, and absent in other transmitter proteins from Escherichia coliK-12. This unique structural element in the NRII C-terminal domain may play a role in binding PII or in intramolecular signal transduction.

Crystal structure of the C-terminal domain of the two-component system transmitter protein nitrogen regulator II (NRII; NtrB), regulator of nitrogen assimilation in Escherichia coli.,Song Y, Peisach D, Pioszak AA, Xu Z, Ninfa AJ Biochemistry. 2004 Jun 1;43(21):6670-8. PMID:15157101^[1]

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

References

↑ Song Y, Peisach D, Pioszak AA, Xu Z, Ninfa AJ. Crystal structure of the C-terminal domain of the two-component system transmitter protein nitrogen regulator II (NRII; NtrB), regulator of nitrogen assimilation in Escherichia coli. Biochemistry. 2004 Jun 1;43(21):6670-8. PMID:15157101 doi:10.1021/bi049474r

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/1r62"

@@ Line 1: / Line 1: @@
 ==Crystal structure of the C-terminal Domain of the Two-Component System Transmitter Protein NRII (NtrB)==
 <StructureSection load='1r62' size='340' side='right' caption='[[1r62]], [[Resolution|resolution]] 1.60&Aring;' scene=''>
@@ Line 4: / Line 5: @@
 <table><tr><td colspan='2'>[[1r62]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Ecoli Ecoli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1R62 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1R62 FirstGlance]. <br>
 </td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">NTRB ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=83333 ECOLI])</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=1r62 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1r62 OCA], [http://pdbe.org/1r62 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1r62 RCSB], [http://www.ebi.ac.uk/pdbsum/1r62 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=1r62 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1r62 OCA], [http://pdbe.org/1r62 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1r62 RCSB], [http://www.ebi.ac.uk/pdbsum/1r62 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1r62 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/r6/1r62_consurf.spt"</scriptWhenChecked>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/r6/1r62_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>

1r62

From Proteopedia

Revision as of 08:10, 28 February 2018

Crystal structure of the C-terminal Domain of the Two-Component System Transmitter Protein NRII (NtrB)

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