PMID- 21438914 OWN - NLM STAT- MEDLINE DCOM- 20110805 LR - 20110426 IS - 1574-6968 (Electronic) IS - 0378-1097 (Linking) VI - 319 IP - 1 DP - 2011 Jun TI - Dictyostelium hybrid polyketide synthase, SteelyA, produces 4-methyl-5-pentylbenzene-1,3-diol and induces spore maturation. PG - 82-7 LID - 10.1111/j.1574-6968.2011.02273.x [doi] AB - The genome of Dictyostelium contains two novel hybrid-type polyketide synthases (PKSs) known as 'Steely'; the Steely enzyme is formed by the fusion of type I and type III PKSs. One of these enzymes, SteelyB, is known to be responsible for the production of the stalk cell-inducing factor DIF-1 in vivo. On the other hand, the product(s) and expression pattern of SteelyA are not clearly understood, because there are two different reports associated with the in vitro products of SteelyA and its expression pattern. To solve this problem, we first examined the expression pattern using two different primer sets and found that it was quite similar to that shown in the dictyExpress database. stlA expression peaked at approximately 3 h and declined, but showed a small peak around the end of development. Next, we examined the in vivo product of SteelyA using a stlA null mutant and found that the mutant lacked 4-methyl-5-pentylbenzene-1,3-diol (MPBD). This null mutant showed aberrant, glassy sori, and most of the cells in the sori remained amoeba-like without a cell wall. This defect was restored by adding 200 nM of MPBD to the agar. These results indicate that SteelyA produces MPBD in vivo and induces spore maturation. CI - (c) 2011 Federation of European Microbiological Societies. Published by Blackwell Publishing Ltd. All rights reserved. FAU - Narita, Takaaki B AU - Narita TB AD - Graduate School of Science and Technology, Sophia University, Tokyo, Japan. FAU - Koide, Kota AU - Koide K FAU - Morita, Naoki AU - Morita N FAU - Saito, Tamao AU - Saito T LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20110411 PL - England TA - FEMS Microbiol Lett JT - FEMS microbiology letters JID - 7705721 RN - 0 (4-methyl-5-pentylbenzene-1,3-diol) RN - 0 (Protozoan Proteins) RN - 0 (Resorcinols) RN - 79956-01-7 (Polyketide Synthases) SB - IM MH - Dictyostelium/*enzymology/genetics/growth & development/metabolism MH - Polyketide Synthases/genetics/*metabolism MH - Protozoan Proteins/genetics/*metabolism MH - Resorcinols/*metabolism MH - Spores, Protozoan/enzymology/genetics/*growth & development/metabolism EDAT- 2011/03/29 06:00 MHDA- 2011/08/06 06:00 CRDT- 2011/03/29 06:00 PHST- 2011/03/29 06:00 [entrez] PHST- 2011/03/29 06:00 [pubmed] PHST- 2011/08/06 06:00 [medline] AID - 10.1111/j.1574-6968.2011.02273.x [doi] PST - ppublish SO - FEMS Microbiol Lett. 2011 Jun;319(1):82-7. doi: 10.1111/j.1574-6968.2011.02273.x. Epub 2011 Apr 11.