Webbläsaren som du använder stöds inte av denna webbplats. Alla versioner av Internet Explorer stöds inte längre, av oss eller Microsoft (läs mer här: * https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Var god och använd en modern webbläsare för att ta del av denna webbplats, som t.ex. nyaste versioner av Edge, Chrome, Firefox eller Safari osv.

Identification of a GH110 subfamily of alpha 1,3-galactosidases - Novel enzymes for removal of the alpha 3Gal xenotransplantation antigen

In English

Författare

  • Qiyong P Liu
  • Huaiping Yuan
  • Eric P Bennett
  • Steven B Levery
  • Edward Nudelman
  • Jean Spence
  • Greg Pietz
  • Kristen Saunders
  • Thayer White
  • Martin L Olsson
  • Bernard Henrissat
  • Gerlind Sulzenbacher
  • Henrik Clausen
Visa allt

Summary, in English

In search of alpha-galactosidases with improved kinetic properties for removal of the immunodominant alpha 1,3-linked galactose residues of blood group B antigens, we recently identified a novel prokaryotic family of alpha-galactosidases (CAZy GH110) with highly restricted substrate specificity and neutral pH optimum (Liu, Q. P., Sulzenbacher, G., Yuan, H., Bennett, E. P., Pietz, G., Saunders, K., Spence, J., Nudelman, E., Levery, S. B., White, T., Neveu, J. M., Lane, W. S., Bourne, Y., Olsson, M. L., Henrissat, B., and Clausen, H. (2007) Nat. Biotechnol. 25, 454-464). One member of this family from Bacteroides fragilis had exquisite substrate specificity for the branched blood group B structure Gal alpha 1-3(Fuc alpha 1-2) Gal, whereas linear oligosaccharides terminated by alpha 1,3-linked galactose such as the immunodominant xenotransplantation epitope Gal alpha 1-3Gal beta 1-4GlcNAc did not serve as substrates. Here we demonstrate the existence of two distinct subfamilies of GH110 in B. fragilis and thetaiotaomicron strains. Members of one subfamily have exclusive specificity for the branched blood group B structures, whereas members of a newly identified subfamily represent linkage specific alpha 1,3-galactosidases that act equally well on both branched blood group B and linear alpha 1,3Gal structures. We determined by one-dimensional H-1 NMR spectroscopy that GH110 enzymes function with an inverting mechanism, which is in striking contrast to all other known alpha-galactosidases that use a retaining mechanism. The novel GH110 subfamily offers enzymes with highly improved performance in enzymatic removal of the immunodominant alpha 3Gal xenotransplantation epitope.

Publiceringsår

2008

Språk

Engelska

Sidor

8545-8554

Publikation/Tidskrift/Serie

Journal of Biological Chemistry

Volym

283

Issue

13

Dokumenttyp

Artikel i tidskrift

Förlag

American Society for Biochemistry and Molecular Biology

Ämne

  • Hematology

Status

Published

Forskningsgrupp

  • Transfusion Medicine

ISBN/ISSN/Övrigt

  • ISSN: 1083-351X