Scripps VIVO scripps research logo

  • Index
  • Log in
  • Home
  • People
  • Organizations
  • Research
  • Events
Search form

Crystal-structure of the human cell-cycle protein ckshs1 - single-domain fold with similarity to kinase n-lobe domain

Academic Article
uri icon
  • Overview
  • Research
  • Identity
  • Additional Document Info
  • View All
scroll to property group menus

Overview

authors

  • Arvai, A. S.
  • Bourne, Y.
  • Hickey, M. J.
  • Tainer, John

publication date

  • June 1995

journal

  • Journal of Molecular Biology  Journal

abstract

  • The structure of the human CksHs1 homolog of the yeast cell-cycle regulatory proteins suc1 and CKS1, which bind to the catalytic subunit of the cyclin-dependent kinases (Cdks) and are essential for yeast cell-cycle progression in vivo, has been determined at 2.9 A resolution. The CksHs1 single polypeptide domain fold, which consists of a four-stranded beta-sheet flanked by two alpha-helices, is dramatically different from the subunit conformation and assembly of the homologous CksHs2, but strikingly similar to the Cdk N-lobe domain fold. The CksHs1 structure identifies sequence-conserved residues Glu61 to His65 as a novel beta-hinge region that folds back to form a beta-hairpin with CksHs1 subunit, whereas this hinge is unfolded to form an extended beta-strand exchange between two CksHs2 subunits. Phosphate and the phosphate analog metavanadate bind CksHs1 in a shallow pocket and interact with five conserved residues (Lys11, Arg20, Ser51, Trp54 and Arg71) suggesting a specific Cks recognition site for a phosphorylated Cdk residue. The dramatic changes to the Cks fold, assembly and exposed conserved surface brought about by switching between the bent and extended hinge conformations are potentially important for the functions of this Cks homolog and could explain conflicting activities inferred from different types of genetic experiments.

subject areas

  • Amino Acid Sequence
  • Binding Sites
  • CDC2-CDC28 Kinases
  • Carrier Proteins
  • Cell Cycle
  • Cell Cycle Proteins
  • Crystallography, X-Ray
  • Cyclin-Dependent Kinases
  • Humans
  • Models, Molecular
  • Molecular Sequence Data
  • Phosphates
  • Protein Kinases
  • Protein Structure, Secondary
  • Protein Structure, Tertiary
  • Sequence Alignment
  • Sequence Homology, Amino Acid
scroll to property group menus

Research

keywords

  • ASSEMBLY
  • CELL CYCLE
  • CRYSTAL STRUCTURE
  • KINASE
  • PHOSPHATE
scroll to property group menus

Identity

International Standard Serial Number (ISSN)

  • 0022-2836

Digital Object Identifier (DOI)

  • 10.1006/jmbi.1995.0341

PubMed ID

  • 7791211
scroll to property group menus

Additional Document Info

start page

  • 835

end page

  • 842

volume

  • 249

issue

  • 5

©2021 The Scripps Research Institute | Terms of Use | Powered by VIVO

  • About
  • Contact Us
  • Support