1pic Citations

Structure of a specific peptide complex of the carboxy-terminal SH2 domain from the p85 alpha subunit of phosphatidylinositol 3-kinase.

EMBO J 15 3579-89 (1996)
Cited: 35 times
EuropePMC logo PMID: 8670861

Abstract

We have determined the solution structure of the C-terminal SH2 domain of the p85 alpha subunit of human phosphatidylinositol (PI) 3-kinase (EC 2.7.1.137) in complex with a phosphorylated tyrosine pentapeptide sequence from the platelet-derived growth factor receptor using heteronuclear nuclear magnetic resonance spectroscopy. Overall, the structure is similar to other SH2 domain complexes, but displays different detail interactions within the phosphotyrosine binding site and in the recognition site for the +3 methionine residue of the peptide, the side chain of which inserts into a particularly deep and narrow pocket which is displaced relative to that of other SH2 domains. The contacts made within this +3 pocket provide the structural basis for the strong selection for methionine at this position which characterizes the SH2 domains of PI3-kinase. Comparison with spectral and structural features of the uncomplexed domain shows that the long BG loop becomes less mobile in the presence of the bound peptide. In contrast, extreme resonance broadening encountered for most residues in the beta D', beta E and beta F strands and associated connecting loops of the domain in the absence of peptide persists in the complex, implying conformational averaging in this part of the molecule on a microsecond-to-millisecond time scale.

Reviews - 1pic mentioned but not cited (1)

  1. Somatic mutations in PI3Kalpha: structural basis for enzyme activation and drug design. Gabelli SB, Mandelker D, Schmidt-Kittler O, Vogelstein B, Amzel LM. Biochim Biophys Acta 1804 533-540 (2010)

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Reviews citing this publication (3)

  1. Structure and function of phosphoinositide 3-kinases. Wymann MP, Pirola L. Biochim Biophys Acta 1436 127-150 (1998)
  2. Glycosylated and phosphorylated proteins--expression in yeast and oocytes of Xenopus: prospects and challenges--relevance to expression of thermostable proteins. Li P, Gao XG, Arellano RO, Renugopalakrishnan V. Protein Expr Purif 22 369-380 (2001)
  3. p110α and p110β isoforms of PI3K signaling: are they two sides of the same coin? Singh P, Dar MS, Dar MJ. FEBS Lett 590 3071-3082 (2016)

Articles citing this publication (28)