title: Molecular cloning and characterization of a thioredoxin/nucleoside diphosphate kinase related dynein intermediate chain from the ascidian, Ciona intestinalis.
abstract: Flagellar outer arm dynein from the ascidian, Ciona intestinalis, contains five intermediate chains (IC1-5). Molecular cloning of C. intestinalis IC3 shows significant sequence homology to the dynein intermediate chain (IC1) from sea urchin and human NM23-H8 protein. The N-terminal thioredoxin-related region is well conserved in the C. intestinalis IC3, sea urchin IC1, and human NM23-H8 protein. Three NDP kinase (NDPK)-related sequences are present in middle portions of both C. intestinalis IC3 and sea urchin IC1, but the human NM23-H8 protein had only two. A large part of the C-terminal glutamic acid-rich region present in sea urchin IC1 was greatly reduced in C. intestinalis IC3 and completely lost in human NM23-H8. Thus, thioredoxin/NDPK-related dynein intermediate chains (TNDK-DIC) would be a characteristic of metazoan flagella and they have become smaller in size and less acidic during evolution.
authors.affiliation: Asamushi Marine Biological Station, Graduate School of Science, Tohoku University, Asamushi, Aomori 039-3501, Japan.
authors.forename: P
authors.initials: P
authors.lastname: Padma
authors.forename: A
authors.initials: A
authors.lastname: Hozumi
authors.forename: K
authors.initials: K
authors.lastname: Ogawa
authors.forename: K
authors.initials: K
authors.lastname: Inaba
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D002938:Ciona intestinalis / Q000201:enzymology / Q000235:genetics*; D003001:Cloning, Molecular; D018076:DNA, Complementary / Q000737:chemistry / Q000235:genetics / Q000302:isolation & purification; D004398:Dyneins / Q000235:genetics* / Q000302:isolation & purification; D006801:Humans; D008297:Male; D008969:Molecular Sequence Data; D009701:Nucleoside-Diphosphate Kinase / Q000235:genetics; D012617:Sea Urchins / Q000235:genetics; D016415:Sequence Alignment; D017422:Sequence Analysis, DNA; D017386:Sequence Homology, Amino Acid; D013082:Sperm Tail / Q000201:enzymology; D013879:Thioredoxins / Q000235:genetics
chemical_list: D018076:DNA, Complementary; D013879:Thioredoxins; D009701:Nucleoside-Diphosphate Kinase; D004398:Dyneins