101
|
Sun L, Lu Z, Li J, Sun F, Huang R. Comparative genomics and transcriptome analysis of Lactobacillus rhamnosus ATCC 11443 and the mutant strain SCT-10-10-60 with enhanced L-lactic acid production capacity. Mol Genet Genomics 2017; 293:265-276. [PMID: 29159508 DOI: 10.1007/s00438-017-1379-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2017] [Accepted: 10/02/2017] [Indexed: 01/01/2023]
Abstract
Mechanisms for high L-lactic acid production remain unclear in many bacteria. Lactobacillus rhamnosus SCT-10-10-60 was previously obtained from L. rhamnosus ATCC 11443 via mutagenesis and showed improved L-lactic acid production. In this study, the genomes of strains SCT-10-10-60 and ATCC 11443 were sequenced. Both genomes are a circular chromosome, 2.99 Mb in length with a GC content of approximately 46.8%. Eight split genes were identified in strain SCT-10-10-60, including two LytR family transcriptional regulators, two Rex redox-sensing transcriptional repressors, and four ABC transporters. In total, 60 significantly up-regulated genes (log2fold-change ≥ 2) and 39 significantly down-regulated genes (log2fold-change ≤ - 2) were identified by a transcriptome comparison between strains SCT-10-10-60 and ATCC 11443. KEGG pathway enrichment analysis revealed that "pyruvate metabolism" was significantly different (P < 0.05) between the two strains. The split genes and the differentially expressed genes involved in the "pyruvate metabolism" pathway are probably responsible for the increased L-lactic acid production by SCT-10-10-60. The genome and transcriptome sequencing information and comparison of SCT-10-10-60 with ATCC 11443 provide insights into the anabolism of L-lactic acid and a reference for improving L-lactic acid production using genetic engineering.
Collapse
Affiliation(s)
- Liang Sun
- College of Life Science and Technology, Guangxi University, Nanning, Guangxi, 530004, China
- State Key Laboratory of Non-Food Biomass and Enzyme Technology, National Engineering Research Center for Non-Food Biorefinery, Guangxi Key Laboratory of Biorefinery, Guangxi Academy of Sciences, Nanning, Guangxi, 530007, China
| | - Zhilong Lu
- College of Life Science and Technology, Guangxi University, Nanning, Guangxi, 530004, China
- State Key Laboratory of Non-Food Biomass and Enzyme Technology, National Engineering Research Center for Non-Food Biorefinery, Guangxi Key Laboratory of Biorefinery, Guangxi Academy of Sciences, Nanning, Guangxi, 530007, China
| | - Jianxiu Li
- College of Life Science and Technology, Guangxi University, Nanning, Guangxi, 530004, China
- State Key Laboratory of Non-Food Biomass and Enzyme Technology, National Engineering Research Center for Non-Food Biorefinery, Guangxi Key Laboratory of Biorefinery, Guangxi Academy of Sciences, Nanning, Guangxi, 530007, China
| | - Feifei Sun
- State Key Laboratory of Non-Food Biomass and Enzyme Technology, National Engineering Research Center for Non-Food Biorefinery, Guangxi Key Laboratory of Biorefinery, Guangxi Academy of Sciences, Nanning, Guangxi, 530007, China
| | - Ribo Huang
- College of Life Science and Technology, Guangxi University, Nanning, Guangxi, 530004, China.
- State Key Laboratory of Non-Food Biomass and Enzyme Technology, National Engineering Research Center for Non-Food Biorefinery, Guangxi Key Laboratory of Biorefinery, Guangxi Academy of Sciences, Nanning, Guangxi, 530007, China.
| |
Collapse
|
102
|
Ito S, Takeya M, Osanai T. Substrate Specificity and Allosteric Regulation of a D-Lactate Dehydrogenase from a Unicellular Cyanobacterium are Altered by an Amino Acid Substitution. Sci Rep 2017; 7:15052. [PMID: 29118438 PMCID: PMC5678113 DOI: 10.1038/s41598-017-15341-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Accepted: 10/25/2017] [Indexed: 01/11/2023] Open
Abstract
Lactate/lactic acid is an important chemical compound for the manufacturing of bioplastics. The unicellular cyanobacterium Synechocystis sp. PCC 6803 can produce lactate from carbon dioxide and possesses d-lactate dehydrogenase (Ddh). Here, we performed a biochemical analysis of the Ddh from this cyanobacterium (SyDdh) using recombinant proteins. SyDdh was classified into a cyanobacterial clade similar to those from Gram-negative bacteria, although it was distinct from them. SyDdh can use both pyruvate and oxaloacetate as a substrate and is activated by fructose-1,6-bisphosphate and repressed by divalent cations. An amino acid substitution based on multiple sequence alignment data revealed that the glutamine at position 14 and serine at position 234 are important for the allosteric regulation by Mg2+ and substrate specificity of SyDdh, respectively. These results reveal the characteristic biochemical properties of Ddh in a unicellular cyanobacterium, which are different from those of other bacterial Ddhs.
Collapse
Affiliation(s)
- Shoki Ito
- School of Agriculture, Meiji University, 1-1-1, Higashimita, Tama-ku, Kawasaki, Kanagawa, 214-8571, Japan
| | - Masahiro Takeya
- School of Agriculture, Meiji University, 1-1-1, Higashimita, Tama-ku, Kawasaki, Kanagawa, 214-8571, Japan
| | - Takashi Osanai
- School of Agriculture, Meiji University, 1-1-1, Higashimita, Tama-ku, Kawasaki, Kanagawa, 214-8571, Japan.
| |
Collapse
|
103
|
Awasthi D, Wang L, Rhee MS, Wang Q, Chauliac D, Ingram LO, Shanmugam KT. Metabolic engineering of
Bacillus subtilis
for production of D‐lactic acid. Biotechnol Bioeng 2017; 115:453-463. [DOI: 10.1002/bit.26472] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Revised: 09/27/2017] [Accepted: 10/05/2017] [Indexed: 01/13/2023]
Affiliation(s)
- Deepika Awasthi
- Department of Microbiology and Cell ScienceUniversity of FloridaGainesvilleFlorida
| | - Liang Wang
- Department of Microbiology and Cell ScienceUniversity of FloridaGainesvilleFlorida
| | - Mun S. Rhee
- Department of Microbiology and Cell ScienceUniversity of FloridaGainesvilleFlorida
| | - Qingzhao Wang
- Department of Microbiology and Cell ScienceUniversity of FloridaGainesvilleFlorida
| | - Diane Chauliac
- Department of Microbiology and Cell ScienceUniversity of FloridaGainesvilleFlorida
| | - Lonnie O. Ingram
- Department of Microbiology and Cell ScienceUniversity of FloridaGainesvilleFlorida
| | | |
Collapse
|
104
|
Fatahpour M, Hazeri N, Maghsoodlou MT, Lashkari M. A Green Approach for the One-Pot, Three-Component Synthesis of 2-Arylpyrroloacridin-1(2H)-Ones using Lactic Acid as a Bio-based Catalyst under Solvent-Free Conditions. J CHIN CHEM SOC-TAIP 2017. [DOI: 10.1002/jccs.201700128] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Maryam Fatahpour
- Department of Chemistry, Faculty of Sciences; University of Sistan and Baluchestan, P.O. Box 98135-674; Zahedan Iran
| | - Nourallah Hazeri
- Department of Chemistry, Faculty of Sciences; University of Sistan and Baluchestan, P.O. Box 98135-674; Zahedan Iran
| | - Malek Taher Maghsoodlou
- Department of Chemistry, Faculty of Sciences; University of Sistan and Baluchestan, P.O. Box 98135-674; Zahedan Iran
| | | |
Collapse
|
105
|
Fatahpour M, Hazeri N, Maghsoodlou MT, Lashkari M. Lactic Acid: A New Application as an Efficient Catalyst for the Green One-Pot Synthesis of 2-Hydroxy-12-aryl-8, 9, 10, 12-Tetrahydrobenzo[a]xanthene-11-one and 12-Aryl-8,9,10,12-Tetrahydrobenzo[a]xanthen-11-one Analogs. IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY TRANSACTION A-SCIENCE 2016. [DOI: 10.1007/s40995-016-0064-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
106
|
Use of dry yeast cells as a cheap nitrogen source for lactic acid production by thermophilic Bacillus coagulans WCP10-4. Front Chem Sci Eng 2015. [DOI: 10.1007/s11705-015-1534-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|