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.

1jb4

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Current revision

CRYSTAL STRUCTURE OF NTF2 M102E MUTANT

Structural highlights

1jb4 is a 2 chain structure with sequence from Rattus norvegicus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 2.23Å
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

NTF2_RAT Facilitates protein transport into the nucleus. Interacts with the nucleoporin p62 and with Ran. Acts at a relatively late stage of nuclear protein import, subsequent to the initial docking of nuclear import ligand at the nuclear envelope. Could be part of a multicomponent system of cytosolic factors that assemble at the pore complex during nuclear import (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

Nuclear transport factor 2 (NTF2) mediates nuclear import of RanGDP, a central component of many nuclear trafficking pathways. NTF2 is a homodimer and each chain has independent binding sites for RanGDP and nuclear pore proteins (nucleoporins) that contain FxFG sequence repeats. We show here that the monomer-dimer dissociation constant for NTF2 obtained by sedimentation equilibrium ultracentrifugation is in the micromolar range, indicating that a substantial proportion of cellular NTF2 may be monomeric. To investigate the functional significance of NTF2 dimerization, we engineered a series of point mutations at the dimerization interface and one of these (M118E) remained monomeric below concentrations of 150 microM. CD spectra and X-ray crystallography showed that M118E-NTF2 preserved the wild-type NTF2 fold, although its thermal stability was 20 deg. C lower than that of the wild-type. M118E-NTF2 bound both RanGDP and FxFG nucleoporins less strongly, suggesting that dissociation of the NTF2 dimer could facilitate RanGDP release and thus nucleotide exchange after it had been transported into the nucleus. Moreover, colloidal gold coated with M118E-NTF2 showed reduced binding to Xenopus oocyte nuclear pores. Overall, our results indicate that dimer formation is important for NTF2 function and give insight into the formation of heterodimers by mRNA export factors such as TAP1 and NXT1 that contain NTF2-homology domains.

NTF2 monomer-dimer equilibrium.,Chaillan-Huntington C, Butler PJ, Huntington JA, Akin D, Feldherr C, Stewart M J Mol Biol. 2001 Nov 30;314(3):465-77. PMID:11846560^[1]

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

References

↑ Chaillan-Huntington C, Butler PJ, Huntington JA, Akin D, Feldherr C, Stewart M. NTF2 monomer-dimer equilibrium. J Mol Biol. 2001 Nov 30;314(3):465-77. PMID:11846560 doi:10.1006/jmbi.2001.5136

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/1jb4"

@@ Line 1: / Line 1: @@
 ==CRYSTAL STRUCTURE OF NTF2 M102E MUTANT==
-<StructureSection load='1jb4' size='340' side='right' caption='[[1jb4]], [[Resolution|resolution]] 2.23&Aring;' scene=''>
+<StructureSection load='1jb4' size='340' side='right'caption='[[1jb4]], [[Resolution|resolution]] 2.23&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[1jb4]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Buffalo_rat Buffalo rat]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1JB4 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1JB4 FirstGlance]. <br>
+<table><tr><td colspan='2'>[[1jb4]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Rattus_norvegicus Rattus norvegicus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1JB4 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1JB4 FirstGlance]. <br>
-</td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1jb2|1jb2]], [[1jb5|1jb5]]</td></tr>
+</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.23&#8491;</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=1jb4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1jb4 OCA], [http://pdbe.org/1jb4 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1jb4 RCSB], [http://www.ebi.ac.uk/pdbsum/1jb4 PDBsum]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1jb4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1jb4 OCA], [https://pdbe.org/1jb4 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1jb4 RCSB], [https://www.ebi.ac.uk/pdbsum/1jb4 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1jb4 ProSAT]</span></td></tr>
 </table>
 == Function ==
-[[http://www.uniprot.org/uniprot/NTF2_RAT NTF2_RAT]] Facilitates protein transport into the nucleus. Interacts with the nucleoporin p62 and with Ran. Acts at a relatively late stage of nuclear protein import, subsequent to the initial docking of nuclear import ligand at the nuclear envelope. Could be part of a multicomponent system of cytosolic factors that assemble at the pore complex during nuclear import (By similarity).
+[https://www.uniprot.org/uniprot/NTF2_RAT NTF2_RAT] Facilitates protein transport into the nucleus. Interacts with the nucleoporin p62 and with Ran. Acts at a relatively late stage of nuclear protein import, subsequent to the initial docking of nuclear import ligand at the nuclear envelope. Could be part of a multicomponent system of cytosolic factors that assemble at the pore complex during nuclear import (By similarity).
 == Evolutionary Conservation ==
 [[Image:Consurf_key_small.gif|200px|right]]
 Check<jmol>
   <jmolCheckbox>
-    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/jb/1jb4_consurf.spt"</scriptWhenChecked>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/jb/1jb4_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: @@
 __TOC__
 </StructureSection>
-[[Category: Buffalo rat]]
+[[Category: Large Structures]]
-[[Category: Akin, D]]
+[[Category: Rattus norvegicus]]
-[[Category: Butler, P J]]
+[[Category: Akin D]]
-[[Category: Chaillan-Huntington, C]]
+[[Category: Butler PJ]]
-[[Category: Feldherr, C]]
+[[Category: Chaillan-Huntington C]]
-[[Category: Huntington, J A]]
+[[Category: Feldherr C]]
-[[Category: Stewart, M]]
+[[Category: Huntington JA]]
-[[Category: Ntf2]]
+[[Category: Stewart M]]
-[[Category: Protein transport]]
-[[Category: Transport]]

1jb4

From Proteopedia

Current revision

CRYSTAL STRUCTURE OF NTF2 M102E MUTANT

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