PMID- 9170243 OWN - NLM STAT- MEDLINE DCOM- 19970716 LR - 20190909 IS - 0273-2289 (Print) IS - 0273-2289 (Linking) VI - 63-65 DP - 1997 Spring TI - Regulation of phosphotransferases in glucose- and xylose-fermenting yeasts. PG - 97-108 AB - This research examined the titers of hexokinase (HK), phosphofructokinase (PFK), and xylulokinase (XUK) in Saccharomyces cerevisiae and two xylose fermenting yeasts, Pachysolen tannophilus and Candida shehatae, following shifts in carbon source and aeration. Xylose-grown C. shehatae, glucose-grown P. tannophilus, and glucose-grown S. cerevisiae, had the highest specific activities of XUK, HK, and PFK, respectively. XUK was induced by xylose to moderate levels in both P. tannophilus and C. shehatae, but was present only in trace levels in S. cerevisiae. HK activities in P. tannophilus were two to three fold higher when cells were grown on glucose than when grown on xylose, but HK levels were less inducible in C. shehatae. The PFK activities in S. cerevisiae were 1.5 to 2 times higher than in the two xylose-fermenting yeasts. Transfer from glucose to xylose rapidly inactivated HK in P. tannophilus, and transfer from xylose to glucose inactivated XUK in C. shehatae. The patterns of induction and inactivation indicate that the basic regulatory mechanisms differ in the two xylose fermenting yeasts. FAU - Yang, V W AU - Yang VW AD - Institute for Microbial and Biochemical Technology, Forest Products Laboratory, Madison, WI 53705-2398, USA. FAU - Jeffries, T W AU - Jeffries TW LA - eng PT - Comparative Study PT - Journal Article PL - United States TA - Appl Biochem Biotechnol JT - Applied biochemistry and biotechnology JID - 8208561 RN - A1TA934AKO (Xylose) RN - EC 2.7.- (Phosphotransferases) RN - EC 2.7.1.- (Phosphotransferases (Alcohol Group Acceptor)) RN - EC 2.7.1.1 (Hexokinase) RN - EC 2.7.1.11 (Phosphofructokinase-1) RN - EC 2.7.1.17 (xylulokinase) RN - IY9XDZ35W2 (Glucose) SB - IM MH - Aerobiosis MH - Anaerobiosis MH - Candida/metabolism MH - Fermentation MH - Glucose/*metabolism MH - Hexokinase/metabolism MH - Kinetics MH - Phosphofructokinase-1/metabolism MH - Phosphotransferases/*metabolism MH - Phosphotransferases (Alcohol Group Acceptor)/metabolism MH - Saccharomyces cerevisiae/metabolism MH - Saccharomycetales/metabolism MH - Species Specificity MH - Xylose/*metabolism MH - Yeasts/growth & development/*metabolism EDAT- 1997/04/01 00:00 MHDA- 1997/04/01 00:01 CRDT- 1997/04/01 00:00 PHST- 1997/04/01 00:00 [pubmed] PHST- 1997/04/01 00:01 [medline] PHST- 1997/04/01 00:00 [entrez] AID - 10.1007/BF02920416 [doi] PST - ppublish SO - Appl Biochem Biotechnol. 1997 Spring;63-65:97-108. doi: 10.1007/BF02920416.