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Image Search Results
Journal: Scientific Reports
Article Title: The E-cadherin/AmotL2 complex organizes actin filaments required for epithelial hexagonal packing and blastocyst hatching
doi: 10.1038/s41598-017-10102-w
Figure Lengend Snippet: AmotL2 associates to the E-cadherin junctional complex. ( a ) Endogenous amotL2, co-immunoprecipitates with E-cadherin, α-catenin, β-catenin, MAGI1 and actin in MDCK cells. The experiment was repeated four times with the same result. Affinity purified rabbit IgG was used as negative control. ( b ) Schematic model depicting the protein binding domains of the human p100 AmotL2 protein (ensemble ENST00000422605). Putative coiled-coil domain (314–572), C-terminal PDZ-binding motif (778–780) and the N-terminal LPTY (104–107) and PPQY (210–213) WW-binding sites. Listed are also the deletion constructs (black lines) and the mutation constructs used to define the E-cadherin binding site. ( c ). Immunoprecipitation analysis using exogenous transfected fragments of human amotL2 (as shown in ( b )). Comparison of the binding patterns to the distinct fragments identified a domain between 220–307 a.a. as being essential for the association to E-cadherin. The experiment was repeated three times showing the same result. ( d ) Mutation of the PPQY motif (Y213A), LPTY (Y107A) or deletion of the PDZ-binding motif (ΔILI) did not affect the binding to E-cadherin. When the LPTY motif was mutated to LPTA (Y107A), the binding of AmotL2 to MAGI1 and actin was lost. The double mutant construct LPTA_PPQA (Y107A_Y213A) showed a binding efficiency similar to the LPTA (Y107A) mutant. Thus, these data show that MAGI1/actin and E-cadherin associate to distinct binding sites of the N-terminal domain of AmotL2. The experiment was repeated three times with the same result.
Article Snippet: The following primary antibodies were used: actin (abcam, ab 3280); for human and dog cells: AmotL2 (polyclonal antibodies reactive to human AmotL2 C-terminal peptide, NH2- CLDSVATSRVQDLSDMVEILI -COOH); for zebrafish: AmotL2 (polyclonal antibody reactive to zebrafish amotL2 C-terminal peptide NH2- CQKAPSAVDLFKGVDDVSAE- COOH), custom made by Innovagen (Lund, Sweden); for mouse blastocysts: AmotL2 (GeneTex, GTX 120712; for human blastocysts: AmotL2 (Aviva, OAAB05455); α-catenin (BD, 610193); β-catenin (BD, 610154); CDX2 (BioSite, MU392A-UC); for human and dog cells: E-cadherin (BD, 610181); for mouse blastocysts: E-cadherin (Sigma, U3254); Ezrin (BD, 610602); GFP (Life technologies, A10262);
Techniques: Affinity Purification, Negative Control, Protein Binding, Binding Assay, Construct, Mutagenesis, Immunoprecipitation, Transfection