![]()
|
|
||||||||
J. Biol. Chem., Vol. 276, Issue 36, 33952-33963, September 7, 2001
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
1,2-Fucosyltransferase That Modifies
Skp1 in the Cytoplasm of Dictyostelium*
,
, and
¶
From the Skp1 is a subunit of the SCF-E3 ubiquitin ligase
that targets cell cycle and other regulatory factors for degradation.
In Dictyostelium, Skp1 is modified by a pentasaccharide
containing the type 1 blood group H trisaccharide at its core. To
address how the third sugar, fucose
Department of Anatomy and Cell Biology,
University of Florida College of Medicine, Gainesville, Florida
32610-0235 and the § Department of Biochemistry, Imperial
College, London SW7 2AY United Kingdom
1,2-linked to galactose, is
attached, a proteomics strategy was applied to determine the primary
structure of FT85, previously shown to copurify with the GDP-Fuc:Skp1
1,2-fucosyltransferase. Tryptic-generated peptides of FT85 were
sequenced de novo using Q-TOF tandem mass spectrometry.
Degenerate primers were used to amplify FT85 genomic DNA, which was
further extended by a novel linker polymerase chain reaction
method to yield an intronless open reading frame of 768 amino acids.
Disruption of the FT85 gene by homologous recombination
resulted in viable cells, which had altered light scattering properties
as revealed by flow cytometry. FT85 was necessary and sufficient for
Skp1 fucosylation, based on biochemical analysis of FT85 mutant cells
and Escherichia coli that express FT85 recombinantly. FT85
lacks sequence motifs that characterize all other known
1,2-fucosyltransferases and lacks the signal-anchor sequence that
targets them to the secretory pathway. The C-terminal region of FT85
harbors motifs found in inverting Family 2 glycosyltransferase domains,
and its expression in FT85 mutant cells restores fucosyltransferase
activity toward a simple disaccharide substrate. Whereas
most prokaryote and eukaryote Family 2 glycosyltransferases are
membrane-bound and oriented toward the cytoplasm where they glycosylate
lipid-linked or polysaccharide precursors prior to membrane
translocation, the soluble, eukaryotic Skp1-fucosyltransferase modifies
a protein that resides in the cytoplasm and nucleus.
The nucleotide sequence(s) reported in this paper has been submitted to the GenBankTM/EMBL Data Bank with accession number(s) AF279134.
¶ To whom correspondence should be addressed: Dept. of Anatomy & Cell Biology, University of Florida College of Medicine, 1600 SW Archer Road, Rm. B1-3, Gainesville, FL 32610-0235. Tel.: 352-392-3329; Fax: 352-392-3305; E-mail: westcm@college.med.ufl.edu.This article has been cited by other articles:
![]() |
Q. Zheng, I. Van Die, and R. D Cummings A novel {alpha}1,2-fucosyltransferase (CE2FT-2) in Caenorhabditis elegans generates H-type 3 glycan structures Glycobiology, April 1, 2008; 18(4): 290 - 302. [Abstract] [Full Text] [PDF] |
||||
![]() |
T. Metcalf, H. van der Wel, R. Escalante, L. Sastre, and C. M. West Role of SP65 in Assembly of the Dictyostelium discoideum Spore Coat Eukaryot. Cell, July 1, 2007; 6(7): 1137 - 1149. [Abstract] [Full Text] [PDF] |
||||
![]() |
B. Ma, J. L. Simala-Grant, and D. E. Taylor Fucosylation in prokaryotes and eukaryotes Glycobiology, December 1, 2006; 16(12): 158R - 184R. [Abstract] [Full Text] [PDF] |
||||
![]() |
A. Ercan, M. Panico, M. Sutton-Smith, A. Dell, H. R. Morris, K. L. Matta, D. F. Gay, and C. M. West Molecular Characterization of a Novel UDP-galactose:Fucoside {alpha}3-Galactosyltransferase That Modifies Skp1 in the Cytoplasm of Dictyostelium J. Biol. Chem., May 5, 2006; 281(18): 12713 - 12721. [Abstract] [Full Text] [PDF] |
||||
![]() |
H. van der Wel, A. Ercan, and C. M. West The Skp1 Prolyl Hydroxylase from Dictyostelium Is Related to the Hypoxia-inducible Factor-{alpha} Class of Animal Prolyl 4-Hydroxylases J. Biol. Chem., April 15, 2005; 280(15): 14645 - 14655. [Abstract] [Full Text] [PDF] |
||||
![]() |
C. Ketcham, F. Wang, S. Z. Fisher, A. Ercan, H. van der Wel, R. D. Locke, k. Sirajud-Doulah, K. L. Matta, and C. M. West Specificity of a Soluble UDP-Galactose:Fucoside {alpha}1,3-Galactosyltransferase That Modifies the Cytoplasmic Glycoprotein Skp1 in Dictyostelium J. Biol. Chem., July 9, 2004; 279(28): 29050 - 29059. [Abstract] [Full Text] [PDF] |
||||
![]() |
A. M. Moody, S. J. North, B. Reinhold, S. J. Van Dyken, M. E. Rogers, M. Panico, A. Dell, H. R. Morris, J. D. Marth, and E. L. Reinherz Sialic Acid Capping of CD8beta Core 1-O-Glycans Controls Thymocyte-Major Histocompatibility Complex Class I Interaction J. Biol. Chem., February 21, 2003; 278(9): 7240 - 7246. [Abstract] [Full Text] [PDF] |
||||
![]() |
H. van der Wel, H. R. Morris, M. Panico, T. Paxton, A. Dell, L. Kaplan, and C. M. West Molecular Cloning and Expression of a UDP-N-acetylglucosamine (GlcNAc):Hydroxyproline Polypeptide GlcNAc-transferase That Modifies Skp1 in the Cytoplasm of Dictyostelium J. Biol. Chem., November 22, 2002; 277(48): 46328 - 46337. [Abstract] [Full Text] [PDF] |
||||
![]() |
H. van der Wel, S. Z. Fisher, and C. M. West A Bifunctional Diglycosyltransferase Forms the Fucalpha 1,2Galbeta 1,3-Disaccharide on Skp1 in the Cytoplasm of Dictyostelium J. Biol. Chem., November 22, 2002; 277(48): 46527 - 46534. [Abstract] [Full Text] [PDF] |
||||
![]() |
Q. Zheng, I. Van Die, and R. D. Cummings Molecular Cloning and Characterization of a Novel alpha 1,2-Fucosyltransferase (CE2FT-1) from Caenorhabditis elegans J. Biol. Chem., October 11, 2002; 277(42): 39823 - 39832. [Abstract] [Full Text] [PDF] |
||||
![]() |
C. M. West, H. van der Wel, and E. A. Gaucher Complex glycosylation of Skp1 in Dictyostelium: implications for the modification of other eukaryotic cytoplasmic and nuclear proteins Glycobiology, February 1, 2002; 12(2): 17R - 27R. [Abstract] [Full Text] [PDF] |
||||
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
| All ASBMB Journals | Molecular and Cellular Proteomics |
| Journal of Lipid Research | ASBMB Today |