7PPN

SHP2 catalytic domain in complex with CD28 (183-198) phosphopeptide (pTyr-191, p-Thr-195)

Summary for 7PPN

• Entry DOI: 10.2210/pdb7ppn/pdb
• Descriptor: Tyrosine-protein phosphatase non-receptor type 11,Tyrosine-protein phosphatase non-receptor type 11, T-cell-specific surface glycoprotein CD28, GLYCEROL, ... (4 entities in total)
• Functional Keywords: shp2, phosphatase, cd28, phosphopeptide, signaling, signaling protein
• Biological source: Homo sapiens (Human); More
• Total number of polymer chains: 2
• Total formula weight: 34920.34

Authors

Sok, P.,Zeke, A.,Remenyi, A. (deposition date: 2021-09-14, release date: 2022-09-07, Last modification date: 2024-01-31)

Primary citation

Zeke, A.,Takacs, T.,Sok, P.,Nemeth, K.,Kirsch, K.,Egri, P.,Poti, A.L.,Bento, I.,Tusnady, G.E.,Remenyi, A.
Structural insights into the pSer/pThr dependent regulation of the SHP2 tyrosine phosphatase in insulin and CD28 signaling.
Nat Commun, 13:5439-5439, 2022

PubMed Abstract: Serine/threonine phosphorylation of insulin receptor substrate (IRS) proteins is well known to modulate insulin signaling. However, the molecular details of this process have mostly been elusive. While exploring the role of phosphoserines, we have detected a direct link between Tyr-flanking Ser/Thr phosphorylation sites and regulation of specific phosphotyrosine phosphatases. Here we present a concise structural study on how the activity of SHP2 phosphatase is controlled by an asymmetric, dual phosphorylation of its substrates. The structure of SHP2 has been determined with three different substrate peptides, unveiling the versatile and highly dynamic nature of substrate recruitment. What is more, the relatively stable pre-catalytic state of SHP2 could potentially be useful for inhibitor design. Our findings not only show an unusual dependence of SHP2 catalytic activity on Ser/Thr phosphorylation sites in IRS1 and CD28, but also suggest a negative regulatory mechanism that may also apply to other tyrosine kinase pathways as well.

PubMed: 36114179
DOI: 10.1038/s41467-022-32918-5

Experimental method

X-RAY DIFFRACTION (1.9 Å)