PMID- 19132369 OWN - NLM STAT- MEDLINE DCOM- 20090511 LR - 20131121 IS - 1432-0614 (Electronic) IS - 0175-7598 (Linking) VI - 83 IP - 1 DP - 2009 May TI - Characterization of beta-1,3-galactosyl-N-acetylhexosamine phosphorylase from Propionibacterium acnes. PG - 109-15 LID - 10.1007/s00253-008-1838-y [doi] AB - Homologs of the beta-1,3-galactosyl-N-acetylhexosamine phosphorylase (GalHexNAcP) gene (gnpA) were cloned from the genomic DNA of Propionibacterium acnes JCM6425 and P. acnes JCM6473, showing 99.9% and 97.9% nucleotide sequence identity, respectively, with the ppa0083 gene from the genome-sequenced P. acnes KPA171202. No gnpA gene was detected in the genomic DNA of type strain P. acnes ATCC25746. The recombinant enzyme from P. acnes JCM6425 (GnpA) showed approximately 70 times higher specific activity of phosphorolysis on galacto-N-biose (Galbeta1-->3GalNAc, GNB) than that on lacto-N-biose I (Galbeta1-->3GlcNAc). K (m) value for GnpA on GNB was high, but GnpA did not exhibit activity on any derivatives of GNB examined. These results indicate that GnpA is GalHexNAcP which should be classified as galacto-N-biose phosphorylase. The large k (cat) value of GnpA on GalNAc suggests that GnpA would be a useful catalyst for the synthesis of GNB. FAU - Nakajima, Masahiro AU - Nakajima M AD - National Food Research Institute, National Agriculture and Food Research Organization, 2-1-12 Kannondai, Tsukuba, Ibaraki 305-8642, Japan. FAU - Nishimoto, Mamoru AU - Nishimoto M FAU - Kitaoka, Motomitsu AU - Kitaoka M LA - eng SI - GENBANK/AB468065 SI - GENBANK/AB468066 PT - Journal Article DEP - 20090109 PL - Germany TA - Appl Microbiol Biotechnol JT - Applied microbiology and biotechnology JID - 8406612 RN - 0 (DNA, Bacterial) RN - 0 (Disaccharides) RN - 5077-31-6 (6-O-galactopyranosylgalactose) RN - 50787-09-2 (galactosyl-1,3-N-acetylglucosamine) RN - EC 2.4.1.- (Galactosyltransferases) RN - EC 2.4.1.- (beta-1,3-galactosyl-N-acetylhexosamine phosphorylase) RN - V956696549 (Acetylglucosamine) SB - IM MH - Acetylglucosamine/analogs & derivatives/metabolism MH - Cloning, Molecular MH - DNA, Bacterial/chemistry/genetics MH - Disaccharides/metabolism MH - Enzyme Stability MH - Galactosyltransferases/*genetics/*metabolism MH - Hydrogen-Ion Concentration MH - Kinetics MH - Molecular Sequence Data MH - Phylogeny MH - Propionibacterium acnes/*enzymology/genetics MH - Sequence Analysis, DNA MH - Sequence Homology, Nucleic Acid MH - Substrate Specificity MH - Temperature EDAT- 2009/01/10 09:00 MHDA- 2009/05/12 09:00 CRDT- 2009/01/10 09:00 PHST- 2008/11/06 00:00 [received] PHST- 2008/12/21 00:00 [accepted] PHST- 2008/12/12 00:00 [revised] PHST- 2009/01/10 09:00 [entrez] PHST- 2009/01/10 09:00 [pubmed] PHST- 2009/05/12 09:00 [medline] AID - 10.1007/s00253-008-1838-y [doi] PST - ppublish SO - Appl Microbiol Biotechnol. 2009 May;83(1):109-15. doi: 10.1007/s00253-008-1838-y. Epub 2009 Jan 9.