Gene transfer of immunoglobulin light chain restores heavy chain secretion. 1986

V H Pepe, and G E Sonenshein, and M I Yoshimura, and M J Shulman

Several lines of evidence suggest that immunoglobulin (Ig) light (L) chain plays a role in the secretion of heavy (H) chain. For example, myeloma variant lines, which synthesize the Ig H chain but not the L chain, fail to secrete H chain protein. Here we have tested directly the role of chain assembly in the control of Ig secretion by the transfer of functional L chain genes into two such L chain-defective myeloma mutants. A lambda 2 or kappa L chain gene was introduced into variant lines of the mouse myelomas MOPC 315 (IgA, lambda 2) or PC7 (IgM, kappa), respectively. Although the two mutant lines are unable to secrete the H chain they produce, rescue of secretion of complete Ig protein molecules (IgA or IgM) was observed after transfection. These results imply that the secretory apparatus of these cells is intact and that the failure to secrete free H chain reflects a structural feature intrinsic to that protein. The implications of these results with respect to control of secretion of multi-subunit proteins are discussed.

UI MeSH Term Description Entries
D007071 Immunoglobulin A, Secretory The principle immunoglobulin in exocrine secretions such as milk, respiratory and intestinal mucin, saliva and tears. The complete molecule (around 400 kD) is composed of two four-chain units of IMMUNOGLOBULIN A, one SECRETORY COMPONENT and one J chain (IMMUNOGLOBULIN J-CHAINS). Colostral IgA,IgA, Exocrine,IgA, Secretory,SIgA,Secretory IgA,Secretory Immunoglobulin A,Exocrine IgA,IgA, Colostral
D007075 Immunoglobulin M A class of immunoglobulin bearing mu chains (IMMUNOGLOBULIN MU-CHAINS). IgM can fix COMPLEMENT. The name comes from its high molecular weight and originally was called a macroglobulin. Gamma Globulin, 19S,IgM,IgM Antibody,IgM1,IgM2,19S Gamma Globulin,Antibody, IgM
D007143 Immunoglobulin Heavy Chains The largest of polypeptide chains comprising immunoglobulins. They contain 450 to 600 amino acid residues per chain, and have molecular weights of 51-72 kDa. Immunoglobulins, Heavy-Chain,Heavy-Chain Immunoglobulins,Ig Heavy Chains,Immunoglobulin Heavy Chain,Immunoglobulin Heavy Chain Subgroup VH-I,Immunoglobulin Heavy Chain Subgroup VH-III,Heavy Chain Immunoglobulins,Heavy Chain, Immunoglobulin,Heavy Chains, Ig,Heavy Chains, Immunoglobulin,Immunoglobulin Heavy Chain Subgroup VH I,Immunoglobulin Heavy Chain Subgroup VH III,Immunoglobulins, Heavy Chain
D007145 Immunoglobulin kappa-Chains One of the types of light chains of the immunoglobulins with a molecular weight of approximately 22 kDa. Ig kappa Chains,Immunoglobulins, kappa-Chain,kappa-Immunoglobulin Light Chains,Immunoglobulin kappa-Chain,kappa-Chain Immunoglobulins,kappa-Immunoglobulin Light Chain,kappa-Immunoglobulin Subgroup VK-12,kappa-Immunoglobulin Subgroup VK-21,Chains, Ig kappa,Immunoglobulin kappa Chain,Immunoglobulin kappa Chains,Immunoglobulins, kappa Chain,Light Chain, kappa-Immunoglobulin,Light Chains, kappa-Immunoglobulin,kappa Chain Immunoglobulins,kappa Chains, Ig,kappa Immunoglobulin Light Chain,kappa Immunoglobulin Light Chains,kappa Immunoglobulin Subgroup VK 12,kappa Immunoglobulin Subgroup VK 21,kappa-Chain, Immunoglobulin,kappa-Chains, Immunoglobulin
D007146 Immunoglobulin lambda-Chains One of the types of light chain subunits of the immunoglobulins with a molecular weight of approximately 22 kDa. Ig lambda Chains,Immunoglobulins, lambda-Chain,Immunoglobulin lambda-Chain,lambda-1-Immunoglobulin,lambda-2-Immunoglobulin,lambda-Chain Immunoglobulins,lambda-Immunoglobulin Light Chain,lambda-Immunoglobulin Light Chains,lambda-x Immunoglobulin,Chains, Ig lambda,Chains, lambda-Immunoglobulin Light,Immunoglobulin lambda Chain,Immunoglobulin lambda Chains,Immunoglobulin, lambda-x,Immunoglobulins, lambda Chain,Light Chain, lambda-Immunoglobulin,Light Chains, lambda-Immunoglobulin,lambda 1 Immunoglobulin,lambda 2 Immunoglobulin,lambda Chain Immunoglobulins,lambda Chains, Ig,lambda Immunoglobulin Light Chain,lambda Immunoglobulin Light Chains,lambda x Immunoglobulin,lambda-Chain, Immunoglobulin,lambda-Chains, Immunoglobulin
D002460 Cell Line Established cell cultures that have the potential to propagate indefinitely. Cell Lines,Line, Cell,Lines, Cell
D003001 Cloning, Molecular The insertion of recombinant DNA molecules from prokaryotic and/or eukaryotic sources into a replicating vehicle, such as a plasmid or virus vector, and the introduction of the resultant hybrid molecules into recipient cells without altering the viability of those cells. Molecular Cloning
D004220 Disulfides Chemical groups containing the covalent disulfide bonds -S-S-. The sulfur atoms can be bound to inorganic or organic moieties. Disulfide
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D014162 Transfection The uptake of naked or purified DNA by CELLS, usually meaning the process as it occurs in eukaryotic cells. It is analogous to bacterial transformation (TRANSFORMATION, BACTERIAL) and both are routinely employed in GENE TRANSFER TECHNIQUES. Transfections

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