The present invention pertains to antigen recognizing constructs against tumor associated antigens (MAGEA1). The invention in particular provides novel T cell receptor (TCR) based molecules which are selective and specific for the tumor expressed antigen of the invention. The TCR of the invention, and TAA binding fragments derived therefrom, are of use for the diagnosis, treatment and prevention of TAA expressing cancerous diseases. Further provided are nucleic acids encoding the antigen recognizing constructs of the invention, vectors comprising these nucleic acids, recombinant cells expressing the antigen recognizing constructs and pharmaceutical compositions comprising the compounds of the invention.本發明涉及針對腫瘤相關抗原(MAGEA1)的抗原識別構建體。本發明特別提出了對本發明腫瘤表達抗原具有選擇性和特異性的新型T細胞受體(TCR)分子。本發明的TCR及其衍生的TAA結合片段可用於診斷、治療和預防表達TAA的癌性疾病。還提出了編碼本發明抗原識別構建體的核酸、包含這些核酸的載體、表達抗原識別構建體的重組細胞以及包含本發明化合物的藥物組合物。