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Volumn 329, Issue 5996, 2010, Pages 1210-1214

The molecular interaction of CAR and JAML recruits the central cell signal transducer PI3K

Author keywords

[No Author keywords available]

Indexed keywords

CD28 ANTIGEN; JUNCTIONAL ADHESION MOLECULE A; PHOSPHATIDYLINOSITOL 3 KINASE; VIRUS RECEPTOR; CELL ADHESION MOLECULE; CLMP PROTEIN, MOUSE; COXSACKIE VIRUS AND ADENOVIRUS RECEPTOR LIKE MEMBRANE PROTEIN; LIGAND; LYMPHOCYTE ANTIGEN RECEPTOR;

EID: 77956280280     PISSN: 00368075     EISSN: 10959203     Source Type: Journal    
DOI: 10.1126/science.1187996     Document Type: Article
Times cited : (103)

References (30)
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    • note
    • JAML crystallized in space group P43 in two forms with 1mol/ASU and with 2mol/ASU, in F222 with 1mol/ASU, and in P3112 as the JAML-CAR complex.
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    • note
    • Although the high protein concentration in the crystal may facilitate CAR-JAML heterotetramer formation analogous to the expected elevation of the effective concentration arising from 2D diffusion of receptors on the cell membrane, the weak affinity constant for oligomerization may explain the difficulty in isolating a CAR-JAML heterotetramer in biochemical experiments. Analytical ultracentrifugation (AUC), coimmunoprecipitation of differentially tagged JAML and CAR, and Bimolecular Fluorescence Complementation (BiFC) assays were used to investigate the formation of CAR-JAML heterotetramers in solution and on the cell surface. Although there was some indication of a CAR-JAML heterotetramer from AUC (table S3) and for JAML dimers from cross-linking experiments and BiFC, providing definitive biochemical evidence for a very low affinity CAR-JAML heterotetramer was intrinsically hampered by experimental constraints (e.g., the limited protein concentrations that could be used in the experiments or that soluble CAR proteins are a poor probe to investigate the heterotypic interactions that naturally occur between the cell-bound JAML and CAR counterreceptors).
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    • note
    • Single-letter abbreviations for the amino acid residues are as follows: A, Ala; C, Cys; D, Asp; E, Glu; F, Phe; G, Gly; H, His; I, Ile; K, Lys; L, Leu; M, Met; N, Asn; P, Pro; Q, Gln; R, Arg; S, Ser; T, Thr; V, Val; W, Trp; and Y, Tyr; and X, any amino acid.
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    • note
    • We thank A. Schiefner for help with the structure solution; S. Ferguson, H. Lindermuth, and J. Vanhasny for technical support; L. Teyton for providing cell lines; J. G. Luz, M. A. Adams-Cioaba, J. Stevens, D. A. Shore, A. L. Corper, R. L. Stanfield, and E. Ollmann Saphire for helpful discussions; and X. Dai and K. Saikatendu for assistance on synchrotron trips. We acknowledge the Advanced Light Source, Stanford Synchrotron Radiation Lightsource, and the Advanced Photon Source for use of their synchrotron facilities. This work was supported by NIH grants AI42266, CA58896 to I.A.W., and AI52257 and AI064811 to W.L.H., an Erwin-Schrödinger Fellowship of the Austrian Science Fund to P.V., and the Skaggs Institute. Atomic coordinates and structure factors for JAML and the CAR-JAML complex have been deposited in the Protein Data Bank with accession numbers 3MJ6 and 3MJ7 respectively. This is manuscript 18641-MB from The Scripps Research Institute.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.