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Logo of bmcmicrBioMed Centralsearchsubmit a manuscriptregisterthis articleBMC Microbiology
 
BMC Microbiol. 2012; 12: 197.
Published online Sep 8, 2012. doi:  10.1186/1471-2180-12-197
PMCID: PMC3479019
Identification and functional analysis of gene cluster involvement in biosynthesis of the cyclic lipopeptide antibiotic pelgipeptin produced by Paenibacillus elgii
Chao-Dong Qian,1 Tian-Zhe Liu,1 Shuang-Lin Zhou,2 Rui Ding,1 Wen-Peng Zhao,1 Ou Li,1 and Xue-Chang Wucorresponding author1
1Institute of Microbiology, College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang Province, P.R.China
2Zhejiang Pharmaceutical College, Ningbo, Zhejiang Province, P.R.China
corresponding authorCorresponding author.
Chao-Dong Qian: qian201/at/163.com; Tian-Zhe Liu: csuliutianzhe/at/163.com; Shuang-Lin Zhou: Zhousl/at/mail.zjpc.net.cn; Rui Ding: rui_ding/at/163.com; Wen-Peng Zhao: iamzhwp/at/yahoo.com.cn; Ou Li: liouwzh/at/sina.com; Xue-Chang Wu: mblab/at/zju.edu.cn
Received June 12, 2012; Accepted August 29, 2012.
Abstract
Background
Pelgipeptin, a potent antibacterial and antifungal agent, is a non-ribosomally synthesised lipopeptide antibiotic. This compound consists of a β-hydroxy fatty acid and nine amino acids. To date, there is no information about its biosynthetic pathway.
Results
A potential pelgipeptin synthetase gene cluster (plp) was identified from Paenibacillus elgii B69 through genome analysis. The gene cluster spans 40.8 kb with eight open reading frames. Among the genes in this cluster, three large genes, plpD, plpE, and plpF, were shown to encode non-ribosomal peptide synthetases (NRPSs), with one, seven, and one module(s), respectively. Bioinformatic analysis of the substrate specificity of all nine adenylation domains indicated that the sequence of the NRPS modules is well collinear with the order of amino acids in pelgipeptin. Additional biochemical analysis of four recombinant adenylation domains (PlpD A1, PlpE A1, PlpE A3, and PlpF A1) provided further evidence that the plp gene cluster involved in pelgipeptin biosynthesis.
Conclusions
In this study, a gene cluster (plp) responsible for the biosynthesis of pelgipeptin was identified from the genome sequence of Paenibacillus elgii B69. The identification of the plp gene cluster provides an opportunity to develop novel lipopeptide antibiotics by genetic engineering.
Keywords: Non-ribosomal peptide, Biosynthesis, Gene cluster, Antimicrobial agent
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