title: Primary structure of the variable region of an amyloidogenic Bence Jones protein NIG-77.
abstract: The complete amino acid sequence of the variable region of a Bence Jones protein NIG-77 from an individual with myeloma-associated systemic amyloidosis has been determined. This protein represents a complete light chain consisting of 216 residues and it has a sequence characteristic of V lambda I subgroup, which is closely homologous to that of another amyloidogenic V lambda I Bence Jones protein NIG-51, differing by 20 of 111 residues (82% homology). In contrast, it differs by 29 residues (74% homology) to that of non-amyloidogenic V lambda I light chain NIG-64. This finding shows that, in accordance with our previous report(1), the V lambda I-related light chains can further be divided into two distinct subsubgroups, V lambda I-1 and V lambda I-2, and the latter property seems to be more prone in association with the amyloid process.
mesh_terms: D000595:Amino Acid Sequence; D000596:Amino Acids / Q000032:analysis; D000686:Amyloidosis / Q000209:etiology / Q000652:urine*; D001536:Bence Jones Protein / Q000302:isolation & purification; D055598:Chemical Phenomena; D002621:Chemistry; D002851:Chromatography, High Pressure Liquid; D005260:Female; D006801:Humans; D008875:Middle Aged; D009101:Multiple Myeloma / Q000150:complications / Q000652:urine*; D010446:Peptide Fragments / Q000032:analysis; D011507:Proteinuria / Q000209:etiology / Q000652:urine; D014357:Trypsin
chemical_list: D000596:Amino Acids; D010446:Peptide Fragments; D001536:Bence Jones Protein; D014357:Trypsin