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.

3eaz

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Revision as of 22:01, 2 December 2018

Crystal structure of SH2 domain of Human Csk (carboxyl-terminal src kinase), C122S mutant.

Structural highlights

3eaz is a 1 chain structure with sequence from Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Related:	3eac, 1k9a
Gene:	CSK (HUMAN)
Activity:	Non-specific protein-tyrosine kinase, with EC number 2.7.10.2
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[CSK_HUMAN] Non-receptor tyrosine-protein kinase that plays an important role in the regulation of cell growth, differentiation, migration and immune response. Phosphorylates tyrosine residues located in the C-terminal tails of Src-family kinases (SFKs) including LCK, SRC, HCK, FYN, LYN or YES1. Upon tail phosphorylation, Src-family members engage in intramolecular interactions between the phosphotyrosine tail and the SH2 domain that result in an inactive conformation. To inhibit SFKs, CSK is recruited to the plasma membrane via binding to transmembrane proteins or adapter proteins located near the plasma membrane. Suppresses signaling by various surface receptors, including T-cell receptor (TCR) and B-cell receptor (BCR) by phosphorylating and maintaining inactive several positive effectors such as FYN or LCK.^[1] ^[2]

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 Src Homology 2 (SH2) domain is a structurally conserved protein domain that typically binds to a phosphorylated tyrosine in a peptide motif from the target protein. The SH2 domain of C-terminal Src kinase (Csk) contains a single disulfide bond, which is unusual for most SH2 domains. Although the global motion of SH2 domain regulates Csk function, little is known about the relationship between the disulfide bond and binding of the ligand. In this study, we combined X-ray crystallography, solution NMR, and other biophysical methods to reveal the interaction network in Csk. Denaturation studies have shown that disulfide bond contributes significantly to the stability of SH2 domain, and crystal structures of the oxidized and C122S mutant showed minor conformational changes. We further investigated the binding of SH2 domain to a phosphorylated peptide from Csk-binding protein upon reduction and oxidation using both NMR and fluorescence approaches. This work employed NMR, X-ray cryptography, and other biophysical methods to study a disulfide bond in Csk SH2 domain. In addition, this work provides in-depth understanding of the structural dynamics of Csk SH2 domain.

Combining biophysical methods to analyze the disulfide bond in SH2 domain of C-terminal Src kinase.,Liu D, Cowburn D Biophys Rep. 2016;2(1):33-43. Epub 2016 Jul 1. PMID:27819029^[3]

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

References

↑ Bergman M, Mustelin T, Oetken C, Partanen J, Flint NA, Amrein KE, Autero M, Burn P, Alitalo K. The human p50csk tyrosine kinase phosphorylates p56lck at Tyr-505 and down regulates its catalytic activity. EMBO J. 1992 Aug;11(8):2919-24. PMID:1639064
↑ Sun G, Budde RJ. Expression, purification, and initial characterization of human Yes protein tyrosine kinase from a bacterial expression system. Arch Biochem Biophys. 1997 Sep 1;345(1):135-42. PMID:9281320 doi:10.1006/abbi.1997.0236
↑ Liu D, Cowburn D. Combining biophysical methods to analyze the disulfide bond in SH2 domain of C-terminal Src kinase. Biophys Rep. 2016;2(1):33-43. Epub 2016 Jul 1. PMID:27819029 doi:http://dx.doi.org/10.1007/s41048-016-0025-4

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 See Also
6 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/3eaz"

@@ Line 3: / Line 3: @@
 <StructureSection load='3eaz' size='340' side='right' caption='[[3eaz]], [[Resolution|resolution]] 1.31&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[3eaz]] is a 1 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3EAZ OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3EAZ FirstGlance]. <br>
+<table><tr><td colspan='2'>[[3eaz]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3EAZ OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3EAZ FirstGlance]. <br>
 </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3eac|3eac]], [[1k9a|1k9a]]</td></tr>
+<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">CSK ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr>
 <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Non-specific_protein-tyrosine_kinase Non-specific protein-tyrosine kinase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.10.2 2.7.10.2] </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=3eaz FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3eaz OCA], [http://pdbe.org/3eaz PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3eaz RCSB], [http://www.ebi.ac.uk/pdbsum/3eaz PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3eaz ProSAT]</span></td></tr>
@@ Line 14: / Line 15: @@
 Check<jmol>
   <jmolCheckbox>
-    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ea/3eaz_consurf.spt"</scriptWhenChecked>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ea/3eaz_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>
@@ Line 36: / Line 37: @@
 __TOC__
 </StructureSection>
+[[Category: Human]]
 [[Category: Non-specific protein-tyrosine kinase]]
 [[Category: Cowburn, D]]

3eaz

From Proteopedia

Revision as of 22:01, 2 December 2018

Crystal structure of SH2 domain of Human Csk (carboxyl-terminal src kinase), C122S mutant.

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox