Ig alpha-1 chain C region


Ig alpha-1 chain C region
Not Available
Gene Name
Amino acid sequence
>lcl|BSEQ0008861|Ig alpha-1 chain C region
Number of residues
Molecular Weight
Theoretical pI
Not Available
GO Classification
antigen binding
antibacterial humoral response / B cell receptor signaling pathway / complement activation, classical pathway / Fc-epsilon receptor signaling pathway / Fc-gamma receptor signaling pathway involved in phagocytosis / glomerular filtration / immune response / innate immune response / phagocytosis, engulfment / phagocytosis, recognition / positive regulation of B cell activation / positive regulation of respiratory burst / protein-chromophore linkage / receptor-mediated endocytosis / retina homeostasis
blood microparticle / external side of plasma membrane / extracellular exosome / extracellular region / extracellular space / monomeric IgA immunoglobulin complex / secretory dimeric IgA immunoglobulin complex / secretory IgA immunoglobulin complex
General Function
Antigen binding
Specific Function
Ig alpha is the major immunoglobulin class in body secretions. It may serve both to defend against local infection and to prevent access of foreign antigens to the general immunologic system.
Pfam Domain Function
Transmembrane Regions
Not Available
Cellular Location
Not Available
Chromosome Location
Not Available
Not Available
External Identifiers
UniProtKB IDP01876
UniProtKB Entry NameIGHA1_HUMAN
General References
  1. Flanagan JG, Lefranc MP, Rabbitts TH: Mechanisms of divergence and convergence of the human immunoglobulin alpha 1 and alpha 2 constant region gene sequences. Cell. 1984 Mar;36(3):681-8. [Article]
  2. Putnam FW, Liu YS, Low TL: Primary structure of a human IgA1 immunoglobulin. IV. Streptococcal IgA1 protease, digestion, Fab and Fc fragments, and the complete amino acid sequence of the alpha 1 heavy chain. J Biol Chem. 1979 Apr 25;254(8):2865-74. [Article]
  3. Kratzin H, Altevogt P, Ruban E, Kortt A, Staroscik K, Hilschmann N: [The primary structure of a monoclonal IgA-immunoglobulin (IgA Tro.), II. The amino acid sequence of the H-chain, alpha-type, subgroup III; structure of the complete IgA-molecule (author's transl)]. Hoppe Seylers Z Physiol Chem. 1975 Aug;356(8):1337-42. [Article]
  4. Yang C, Kratzin H, Gotz H, Hilschmann N: [Rule of antibody structure. Primary structure of a human monoclonal IgA-immunoglobulin (myeloma protein Tro). VII. Purification and characterization of the disulfide bridges]. Hoppe Seylers Z Physiol Chem. 1979 Dec;360(12):1919-40. [Article]
  5. Calero M, Escribano J, Grubb A, Mendez E: Location of a novel type of interpolypeptide chain linkage in the human protein HC-IgA complex (HC-IgA) and identification of a heterogeneous chromophore associated with the complex. J Biol Chem. 1994 Jan 7;269(1):384-9. [Article]
  6. Kerr MA: The structure and function of human IgA. Biochem J. 1990 Oct 15;271(2):285-96. [Article]
  7. Hatzivassiliou G, Miller I, Takizawa J, Palanisamy N, Rao PH, Iida S, Tagawa S, Taniwaki M, Russo J, Neri A, Cattoretti G, Clynes R, Mendelsohn C, Chaganti RS, Dalla-Favera R: IRTA1 and IRTA2, novel immunoglobulin superfamily receptors expressed in B cells and involved in chromosome 1q21 abnormalities in B cell malignancy. Immunity. 2001 Mar;14(3):277-89. [Article]
  8. Kristiansen TZ, Bunkenborg J, Gronborg M, Molina H, Thuluvath PJ, Argani P, Goggins MG, Maitra A, Pandey A: A proteomic analysis of human bile. Mol Cell Proteomics. 2004 Jul;3(7):715-28. Epub 2004 Apr 14. [Article]
  9. Jia W, Lu Z, Fu Y, Wang HP, Wang LH, Chi H, Yuan ZF, Zheng ZB, Song LN, Han HH, Liang YM, Wang JL, Cai Y, Zhang YK, Deng YL, Ying WT, He SM, Qian XH: A strategy for precise and large scale identification of core fucosylated glycoproteins. Mol Cell Proteomics. 2009 May;8(5):913-23. doi: 10.1074/mcp.M800504-MCP200. Epub 2009 Jan 12. [Article]
  10. Nilsson J, Ruetschi U, Halim A, Hesse C, Carlsohn E, Brinkmalm G, Larson G: Enrichment of glycopeptides for glycan structure and attachment site identification. Nat Methods. 2009 Nov;6(11):809-11. doi: 10.1038/nmeth.1392. Epub 2009 Oct 18. [Article]
  11. Burkard TR, Planyavsky M, Kaupe I, Breitwieser FP, Burckstummer T, Bennett KL, Superti-Furga G, Colinge J: Initial characterization of the human central proteome. BMC Syst Biol. 2011 Jan 26;5:17. doi: 10.1186/1752-0509-5-17. [Article]
  12. Halim A, Nilsson J, Ruetschi U, Hesse C, Larson G: Human urinary glycoproteomics; attachment site specific analysis of N- and O-linked glycosylations by CID and ECD. Mol Cell Proteomics. 2012 Apr;11(4):M111.013649. doi: 10.1074/mcp.M111.013649. Epub 2011 Dec 14. [Article]
  13. Bian Y, Song C, Cheng K, Dong M, Wang F, Huang J, Sun D, Wang L, Ye M, Zou H: An enzyme assisted RP-RPLC approach for in-depth analysis of human liver phosphoproteome. J Proteomics. 2014 Jan 16;96:253-62. doi: 10.1016/j.jprot.2013.11.014. Epub 2013 Nov 22. [Article]

Drug Relations

Drug Relations
DrugBank IDNameDrug groupPharmacological action?ActionsDetails
DB01593Zincapproved, investigationalunknownDetails
DB14487Zinc acetateapproved, investigationalunknownDetails