METHOD FOR PRODUCING Ig-LIKE MOLECULE OF HETERODIMER, METHOD FOR FABRICATING Ig-LIKE MOLECULE OF HETERODIMER, ANTIBODY OF HETERODIMER, RECOMBINANT HOST CELL, PHARMACEUTICAL COMPOSITION, AND HOST CELL, AND CULTURED PRODUCT
To provide a method for producing Ig-like molecule of heterodimer including CH3 mutation.SOLUTION: A method for producing an Ig-like molecule of heterodimer in which the Ig-like molecule includes two CH3 domains capable of forming a contact face. The method includes giving: a. a first nucleic acid molecule which codes a polypeptide chain including a first CH3 domain; and b. a second nucleic acid molecule which codes a polypeptide chain including a second CH3 domain to a single cell, in which the polypeptide chain including the first CH3 domain is equipped with glutamic acid (E) residue or aspartic acid (D) residue at 366-th position of amino acid, and the polypeptide chain including the second CH3 domain is equipped with arginine (R) residue or lysine (K) residue at 351-th position of amino acid. The method further includes a process of culturing the host cell, expressing the two nucleic acid, and recovering the Ig-like molecule of the heterodimer from a cultured product.SELECTED DRAWING: Figure 1【課題】CH3変異を含むヘテロ二量体のIg様分子の生産方法の提供。【解決手段】Ig様分子が、接触面を形成することができる2つのCH3ドメインを備え、単一細胞に、a.第1のCH3ドメインを備えるポリペプチド鎖をコードする第1の核酸分子、b.第2のCH3ドメインを備えるポリペプチド鎖をコードする第2の核酸分子を与えることを含み、前記第1のCH3ドメインを備えるポリペプチド鎖は、アミノ酸の366番目の位置にあるグルタミン酸(E)残基またはアスパラギン酸(D)残基を備え、前記第2のCH3ドメインを備えるポリペプチド鎖は、アミノ酸の351番目の位置にあるアルギニン(R)残基またはリシン(K)残基を備え、前記宿主細胞を培養し、前記2つの核酸を発現させ、前記ヘテロ二量体のIg様分子を培養物から回収する工程をさらに備える、ヘテロ二量体のIg様分子を生産する方法。【選択図】図1