5df6: Difference between revisions
No edit summary |
No edit summary |
||
Line 3: | Line 3: | ||
<StructureSection load='5df6' size='340' side='right' caption='[[5df6]], [[Resolution|resolution]] 1.78Å' scene=''> | <StructureSection load='5df6' size='340' side='right' caption='[[5df6]], [[Resolution|resolution]] 1.78Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[5df6]] is a 3 chain structure. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=5c96 5c96]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5DF6 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5DF6 FirstGlance]. <br> | <table><tr><td colspan='2'>[[5df6]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=5c96 5c96]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5DF6 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5DF6 FirstGlance]. <br> | ||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=UNX:UNKNOWN+ATOM+OR+ION'>UNX</scene></td></tr> | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=UNX:UNKNOWN+ATOM+OR+ION'>UNX</scene></td></tr> | ||
<tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=NH2:AMINO+GROUP'>NH2</scene>, <scene name='pdbligand=PTR:O-PHOSPHOTYROSINE'>PTR</scene></td></tr> | <tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=NH2:AMINO+GROUP'>NH2</scene>, <scene name='pdbligand=PTR:O-PHOSPHOTYROSINE'>PTR</scene></td></tr> | ||
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">PTPN11, PTP2C, SHPTP2 ([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/Protein-tyrosine-phosphatase Protein-tyrosine-phosphatase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.1.3.48 3.1.3.48] </span></td></tr> | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Protein-tyrosine-phosphatase Protein-tyrosine-phosphatase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.1.3.48 3.1.3.48] </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=5df6 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5df6 OCA], [http://pdbe.org/5df6 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5df6 RCSB], [http://www.ebi.ac.uk/pdbsum/5df6 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5df6 ProSAT]</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=5df6 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5df6 OCA], [http://pdbe.org/5df6 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5df6 RCSB], [http://www.ebi.ac.uk/pdbsum/5df6 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5df6 ProSAT]</span></td></tr> | ||
Line 22: | Line 23: | ||
</div> | </div> | ||
<div class="pdbe-citations 5df6" style="background-color:#fffaf0;"></div> | <div class="pdbe-citations 5df6" style="background-color:#fffaf0;"></div> | ||
== References == | == References == | ||
<references/> | <references/> | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: Human]] | |||
[[Category: Protein-tyrosine-phosphatase]] | [[Category: Protein-tyrosine-phosphatase]] | ||
[[Category: Arrowsmith, C H]] | [[Category: Arrowsmith, C H]] |
Revision as of 18:51, 16 November 2017
Crystal structure of PTPN11 tandem SH2 domains in complex with a TXNIP peptideCrystal structure of PTPN11 tandem SH2 domains in complex with a TXNIP peptide
Structural highlights
Disease[PTN11_HUMAN] Defects in PTPN11 are the cause of LEOPARD syndrome type 1 (LEOPARD1) [MIM:151100]. It is an autosomal dominant disorder allelic with Noonan syndrome. The acronym LEOPARD stands for lentigines, electrocardiographic conduction abnormalities, ocular hypertelorism, pulmonic stenosis, abnormalities of genitalia, retardation of growth, and deafness.[1] [2] [3] [4] [5] [6] [7] Defects in PTPN11 are the cause of Noonan syndrome type 1 (NS1) [MIM:163950]. Noonan syndrome (NS) is a disorder characterized by dysmorphic facial features, short stature, hypertelorism, cardiac anomalies, deafness, motor delay, and a bleeding diathesis. Some patients with Noonan syndrome type 1 develop multiple giant cell lesions of the jaw or other bony or soft tissues, which are classified as pigmented villomoduolar synovitis (PVNS) when occurring in the jaw or joints. Note=Mutations in PTPN11 account for more than 50% of the cases. Rarely, NS is associated with juvenile myelomonocytic leukemia (JMML). NS1 inheritance is autosomal dominant.[8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] Defects in PTPN11 are a cause of juvenile myelomonocytic leukemia (JMML) [MIM:607785]. JMML is a pediatric myelodysplastic syndrome that constitutes approximately 30% of childhood cases of myelodysplastic syndrome (MDS) and 2% of leukemia. It is characterized by leukocytosis with tissue infiltration and in vitro hypersensitivity of myeloid progenitors to granulocyte-macrophage colony stimulating factor.[20] Defects in PTPN11 are a cause of metachondromatosis (MC) [MIM:156250]. It is a skeletal disorder with radiologic fetarures of both multiple exostoses and Ollier disease, characterized by the presence of multiple enchondromas and osteochondroma-like lesions.[21] Function[PTN11_HUMAN] Acts downstream of various receptor and cytoplasmic protein tyrosine kinases to participate in the signal transduction from the cell surface to the nucleus. Dephosphorylates ROCK2 at Tyr-722 resulting in stimulatation of its RhoA binding activity.[22] [23] [24] Publication Abstract from PubMedThioredoxin interacting protein (TXNIP) negatively regulates the antioxidative activity of thioredoxin, and participates in pleiotropic cellular processes. Its deregulation is linked to various human diseases including diabetes, acute myeloid leukemia and cardiovascular diseases. The E3 ubiquitin ligase Itch polyubiquitinates TXNIP to promote its degradation via the ubiquitin proteasome pathway, and this Itch-mediated poly-ubiquitination of TXNIP is dependent on the interaction of the four WW domains of Itch with the two PPxY motifs of TXNIP. However, the molecular mechanism of this interaction of TXNIP with Itch remains elusive. In this study, we found that each of the four WW domains of Itch exhibited different binding affinities to TXNIP, while multivalent engagement between the four WW domains of Itch and the two PPxY motifs of TXNIP resulted in their strong binding avidity. Our structural analyses demonstrated that the third and fourth WW domains of Itch were able to recognize both PPxY motifs of TXNIP simultaneously, supporting a multivalent binding mode between Itch and TXNIP. Interestingly, phosphorylation status on the tyrosine residue of the PPxY motifs of TXNIP serves as a molecular switch in its choice of binding partners and thereby downstream biological signaling outcomes. Phosphorylation of this tyrosine residue of TXNIP diminished the binding capability of PPxY motifs of TXNIP to Itch, whereas this phosphorylation is a prerequisite to the binding activity of TXNIP to SH2 domain containing protein SHP2 and their roles in stabilizing the phosphorylation and activation of CSK. Structural basis for the regulatory role of the PPxY motifs in the thioredoxin-interacting protein TXNIP.,Liu Y, Lau J, Li W, Tempel W, Li L, Dong A, Narula A, Qin S, Min J Biochem J. 2015 Nov 2. pii: BJ20150830. PMID:26527736[25] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
|
|