Structural highlights
Function
FIBER_BPK1F Responsible for initial absorption of the phage to the host bacterium. Degrades the alpha-2,8-linked polysialic acid K1 capsule by cleaving within the polymer chain of polysialic acid.[1] [2] The C-terminal chaperone protein mediates homotrimerization and proper folding of the catalytic endo-N trimer.[3]
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
Endosialidase NF (endoNF) is a bacteriophage-derived endosialidase that specifically degrades alpha-2,8-linked polysialic acid. The structure of a new crystal form of endoNF in complex with sialic acid has been refined at 0.98 A resolution. The 210 kDa homotrimeric multi-domain enzyme displays outstanding stability and resistance to SDS. Even at atomic resolution, only a minor fraction of side chains possess alternative conformations. However, multiple conformations of an active-site residue imply that it has an important catalytic function in the cleavage mechanism of polysialic acid.
Structure analysis of endosialidase NF at 0.98 A resolution.,Schulz EC, Neumann P, Gerardy-Schahn R, Sheldrick GM, Ficner R Acta Crystallogr D Biol Crystallogr. 2010 Feb;66(Pt 2):176-80. Epub 2010 Jan 22. PMID:20124697[4]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Schulz EC, Schwarzer D, Frank M, Stummeyer K, Muhlenhoff M, Dickmanns A, Gerardy-Schahn R, Ficner R. Structural basis for the recognition and cleavage of polysialic acid by the bacteriophage K1F tailspike protein EndoNF. J Mol Biol. 2010 Mar 19;397(1):341-51. Epub 2010 Jan 22. PMID:20096705 doi:10.1016/j.jmb.2010.01.028
- ↑ Hallenbeck PC, Vimr ER, Yu F, Bassler B, Troy FA. Purification and properties of a bacteriophage-induced endo-N-acetylneuraminidase specific for poly-alpha-2,8-sialosyl carbohydrate units. J Biol Chem. 1987 Mar 15;262(8):3553-61. PMID:3546309
- ↑ Muhlenhoff M, Stummeyer K, Grove M, Sauerborn M, Gerardy-Schahn R. Proteolytic processing and oligomerization of bacteriophage-derived endosialidases. J Biol Chem. 2003 Apr 11;278(15):12634-44. Epub 2003 Jan 29. PMID:12556457 doi:10.1074/jbc.M212048200
- ↑ Schulz EC, Neumann P, Gerardy-Schahn R, Sheldrick GM, Ficner R. Structure analysis of endosialidase NF at 0.98 A resolution. Acta Crystallogr D Biol Crystallogr. 2010 Feb;66(Pt 2):176-80. Epub 2010 Jan 22. PMID:20124697 doi:10.1107/S0907444909048720
