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.


1cdy

From Proteopedia

(Difference between revisions)
Jump to: navigation, search
Current revision (15:39, 13 March 2024) (edit) (undo)
 
(13 intermediate revisions not shown.)
Line 1: Line 1:
-
[[Image:1cdy.gif|left|200px]]
 
-
<!--
+
==STRUCTURE OF T-CELL SURFACE GLYCOPROTEIN CD4 MUTANT WITH GLY 47 REPLACED BY SER==
-
The line below this paragraph, containing "STRUCTURE_1cdy", creates the "Structure Box" on the page.
+
<StructureSection load='1cdy' size='340' side='right'caption='[[1cdy]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
-
You may change the PDB parameter (which sets the PDB file loaded into the applet)
+
== Structural highlights ==
-
or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
+
<table><tr><td colspan='2'>[[1cdy]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1CDY OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1CDY FirstGlance]. <br>
-
or leave the SCENE parameter empty for the default display.
+
</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&#8491;</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=1cdy FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1cdy OCA], [https://pdbe.org/1cdy PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1cdy RCSB], [https://www.ebi.ac.uk/pdbsum/1cdy PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1cdy ProSAT]</span></td></tr>
-
{{STRUCTURE_1cdy| PDB=1cdy | SCENE= }}
+
</table>
 +
== Function ==
 +
[https://www.uniprot.org/uniprot/CD4_HUMAN CD4_HUMAN] Accessory protein for MHC class-II antigen/T-cell receptor interaction. May regulate T-cell activation. Induces the aggregation of lipid rafts.
 +
== 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/cd/1cdy_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/main_output.php?pdb_ID=1cdy ConSurf].
 +
<div style="clear:both"></div>
-
'''STRUCTURE OF T-CELL SURFACE GLYCOPROTEIN CD4 MUTANT WITH GLY 47 REPLACED BY SER'''
+
==See Also==
-
 
+
*[[CD4 3D structures|CD4 3D structures]]
-
 
+
__TOC__
-
==Overview==
+
</StructureSection>
-
The T-cell antigen coreceptor CD4 also serves as the receptor for the envelope glycoprotein gp120 of HIV. Extensive mutational analysis of CD4 has implicated residues from a portion of the extracellular amino-terminal domain (D1) in gp120 binding. However, none of these proteins has been fully characterized biophysically, and thus the precise effects on molecular structure and binding interactions are unknown. In the present study, we produced soluble versions of three mutant CD4 molecules (F43V, G47S, and A55F) and characterized their structural properties, thermostability, and ability to bind gp120. Crystallographic and thermodynamic analysis showed minimal structural alterations in the F43V and G47S mutant proteins, which have solvent-exposed mutant side chains. In contrast, some degree of disorder appears to exist in the folded state of A55F, as a result of mutating a buried side chain. Real time kinetic measurements of the interaction of the mutant proteins with gp120 showed affinity decreases of 5-fold for G47S, 50-fold for A55F, and 200-fold for F43V. Although both rate constants for the binding reaction were affected by these mutations, the loss in affinity was mainly due to a decrease in on rates, with less drastic changes occurring in the off rates. These observations suggest the involvement of conformational adaptation in the CD4-gp120 interaction. Together, the structural and kinetic data confirm that F43V is a critical residue in gp120 recognition site, which may also include main chain interactions at residue Gly-47.
+
-
 
+
-
==About this Structure==
+
-
1CDY is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1CDY OCA].
+
-
 
+
-
==Reference==
+
-
Kinetic and structural analysis of mutant CD4 receptors that are defective in HIV gp120 binding., Wu H, Myszka DG, Tendian SW, Brouillette CG, Sweet RW, Chaiken IM, Hendrickson WA, Proc Natl Acad Sci U S A. 1996 Dec 24;93(26):15030-5. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/8986758 8986758]
+
[[Category: Homo sapiens]]
[[Category: Homo sapiens]]
-
[[Category: Single protein]]
+
[[Category: Large Structures]]
-
[[Category: Brouillette, C G.]]
+
[[Category: Brouillette CG]]
-
[[Category: Chaiken, I M.]]
+
[[Category: Chaiken IM]]
-
[[Category: Hendrickson, W A.]]
+
[[Category: Hendrickson WA]]
-
[[Category: Myszka, D.]]
+
[[Category: Myszka D]]
-
[[Category: Sweet, R W.]]
+
[[Category: Sweet RW]]
-
[[Category: Tendian, S W.]]
+
[[Category: Tendian SW]]
-
[[Category: Wu, H.]]
+
[[Category: Wu H]]
-
[[Category: Glycoprotein]]
+
-
[[Category: Immunoglobulin fold]]
+
-
[[Category: Lipoprotein]]
+
-
[[Category: Mhc]]
+
-
[[Category: T-cell]]
+
-
[[Category: T-cell surface glycoprotein]]
+
-
[[Category: Transmembrane]]
+
-
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 12:37:16 2008''
+

Current revision

STRUCTURE OF T-CELL SURFACE GLYCOPROTEIN CD4 MUTANT WITH GLY 47 REPLACED BY SER

PDB ID 1cdy

Drag the structure with the mouse to rotate

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1cdy"
Personal tools