These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: The primary structure and analysis of the squid kinesin heavy chain.
    Author: Kosik KS, Orecchio LD, Schnapp B, Inouye H, Neve RL.
    Journal: J Biol Chem; 1990 Feb 25; 265(6):3278-83. PubMed ID: 2137456.
    Abstract:
    We report the cDNA sequence of the squid kinesin heavy chain and compared the predicted amino acid sequence with that of the Drosophila heavy chain as reported by Yang, J.T., Laymon, R.A., and Goldstein, L.S. B. (1989) Cell 56, 879-889). We compared the two kinesin sequences with regard to the predicted physicochemical parameters of hydrophobicity, charge, and propensities of the secondary conformations. A comparison of the sequences from the two species reveals the head, stalk, and tail domains because a reduced degree of conservation demarcates the stalk. The charge profile indicates that the head region is nearly neutral, the stalk region acidic, and the tail is basic. The Fourier transform analysis of the hydrophobic profile of the stalk shows predominant peaks at 1/3.5 and 1/2.3, which are indexed as the second and third orders of the period 7 residue. As in the Drosophila sequence, the rod domain is divided into an amino and a carboxyl subdomain by a predicted hinge region. We show that the disposition of hydrophobic residues is distinct in these two subdomains. In particular, the heptad repeat is more regular in the amino-terminal rod domain than in the carboxyl-terminal rod domain. The tail region is positively charged, a feature that is consistent with the known electrostatic interaction between the heavy chain and negatively charged surfaces such as glass coverslips and latex beads. Three monoclonal antibodies to the kinesin heavy chain have been mapped to a region within the carboxyl terminus of the stalk.
    [Abstract] [Full Text] [Related] [New Search]