PMID- 37317084 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20230617 IS - 2076-2607 (Print) IS - 2076-2607 (Electronic) IS - 2076-2607 (Linking) VI - 11 IP - 5 DP - 2023 Apr 24 TI - Polyhydroxybutyrate Production from Methane and Carbon Dioxide by a Syntrophic Consortium of Methanotrophs with Oxygenic Photogranules without an External Oxygen Supply. LID - 10.3390/microorganisms11051110 [doi] LID - 1110 AB - Here, a syntrophic process was developed to produce polyhydroxy-beta-butyrate (PHB) from a gas stream containing CH(4) and CO(2) without an external oxygen supply using a combination of methanotrophs with the community of oxygenic photogranules (OPGs). The co-culture features of Methylomonas sp. DH-1 and Methylosinus trichosporium OB3b were evaluated under carbon-rich and carbon-lean conditions. The critical role of O(2) in the syntrophy was confirmed through the sequencing of 16S rRNA gene fragments. Based on their carbon consumption rates and the adaptation to a poor environment, M. trichosporium OB3b with OPGs was selected for methane conversion and PHB production. Nitrogen limitation stimulated PHB accumulation in the methanotroph but hindered the growth of the syntrophic consortium. At 2.9 mM of the nitrogen source, 1.13 g/L of biomass and 83.0 mg/L of PHB could be obtained from simulated biogas. These results demonstrate that syntrophy has the potential to convert greenhouse gases into valuable products efficiently. FAU - Ashoor, Selim AU - Ashoor S AUID- ORCID: 0000-0003-1552-6657 AD - Department of Agricultural Microbiology, Faculty of Agriculture, Ain Shams University, Hadayek Shoubra, Cairo 11241, Egypt. AD - Department of Chemical and Biomolecular Engineering, Sogang University, Seoul 04107, Republic of Korea. FAU - Jun, Seong-Hoon AU - Jun SH AD - Department of Chemical and Biomolecular Engineering, Sogang University, Seoul 04107, Republic of Korea. FAU - Ko, Han Do AU - Ko HD AD - Department of Chemical and Biomolecular Engineering, Sogang University, Seoul 04107, Republic of Korea. FAU - Lee, Jinwon AU - Lee J AD - Department of Chemical and Biomolecular Engineering, Sogang University, Seoul 04107, Republic of Korea. FAU - Hamelin, Jerome AU - Hamelin J AUID- ORCID: 0000-0003-3601-6349 AD - INRAE, University of Montpellier, LBE, 102 Avenue des Etangs, 11100 Narbonne, France. FAU - Milferstedt, Kim AU - Milferstedt K AUID- ORCID: 0000-0002-1186-3982 AD - INRAE, University of Montpellier, LBE, 102 Avenue des Etangs, 11100 Narbonne, France. FAU - Na, Jeong-Geol AU - Na JG AUID- ORCID: 0000-0003-2196-7547 AD - Department of Chemical and Biomolecular Engineering, Sogang University, Seoul 04107, Republic of Korea. LA - eng GR - NRF-2015M3D3A1A01064926/National Research Foundation of Korea/ GR - NRF-2019K1A3A1A21031925/National Research Foundation of Korea/ PT - Journal Article DEP - 20230424 PL - Switzerland TA - Microorganisms JT - Microorganisms JID - 101625893 PMC - PMC10224382 OTO - NOTNLM OT - greenhouse gas mitigation OT - methanotrophy OT - oxygenic photogranules OT - polyhydroxybutyrate OT - syntrophic process COIS- The authors declare no conflict of interest. EDAT- 2023/06/15 06:42 MHDA- 2023/06/15 06:43 PMCR- 2023/04/24 CRDT- 2023/06/15 01:01 PHST- 2023/03/26 00:00 [received] PHST- 2023/04/16 00:00 [revised] PHST- 2023/04/22 00:00 [accepted] PHST- 2023/06/15 06:43 [medline] PHST- 2023/06/15 06:42 [pubmed] PHST- 2023/06/15 01:01 [entrez] PHST- 2023/04/24 00:00 [pmc-release] AID - microorganisms11051110 [pii] AID - microorganisms-11-01110 [pii] AID - 10.3390/microorganisms11051110 [doi] PST - epublish SO - Microorganisms. 2023 Apr 24;11(5):1110. doi: 10.3390/microorganisms11051110.