Autotrophic growth on carbon disulfide is a property of novel strains of Paracoccus denitrificans

被引:43
作者
Jordan, SL
McDonald, IR
KraczkiewiczDowjat, AJ
Kelly, DP
Rainey, FA
Murrell, JC
Wood, AP
机构
[1] UNIV LONDON KINGS COLL, DIV LIFE SCI, LONDON W8 7AH, ENGLAND
[2] UNIV WARWICK, DEPT BIOL SCI, COVENTRY CV4 7AL, W MIDLANDS, ENGLAND
[3] UNIV WARSAW, INST MICROBIOL, WARSAW, POLAND
[4] UNIV WARWICK, INST EDUC, ENVIRONM SCI RES & EDUC UNIT, COVENTRY CV4 7AL, W MIDLANDS, ENGLAND
[5] LOUISIANA STATE UNIV, DEPT MICROBIOL, BATON ROUGE, LA 70803 USA
基金
英国自然环境研究理事会;
关键词
Paracoccus denitrificans; Paracoccus versutus; CS2; oxidation; oxygenase; autotrophy; 16S rRNA phylogeny; plasmids; megaplasmids; murein; gas chromatography; SDS-PAGE profiles;
D O I
10.1007/s002030050492
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
Three distinct strains (KL1, KS1, and KS2) of facultatively chemolitho-autotrophic bacteria able to use carbon disulfide or carbonyl sulfide as sole energy substrates were identified as novel strains of Paracoccus denitrificans. Evidence for their identity as biovars of P. denitrificans and as close relatives of Paracoccus versutus is based on their DNA composition, total sequencing of the genes for their 16S rRNA, muropeptide profiles, amino acid composition of peptidoglycan, kinetics of murein degradation by lysozyme, possession of large plasmids (91-98 kb) and megaplasmids (> 450 kb), and plasmid transfer between the strains and with P. denitrificans and P. versutus. No functions have been identified for the 91- to 98-kb plasmids of strains KL1 and KS2, but curing strain KL1 of its plasmid did not affect growth on carbon disulfide, thiosulfate or succinate. Emendation of the formal description of Paracoccus denitrificans is presented. Autotrophic growth on carbon disulfide and thiosulfate was confined by (CO2)-C-14 fixation. Evidence is presented for initiation of carbon disulfide oxidation by an NADH-dependent oxygenase. Cell-free extracts catalyzed (I) NADH-stimulated uptake of oxygen in the presence of carbon disulfide, and (2) carbon-disulfide-stimulated oxidation of NADH. The activity was not sedimented at 50,000 x g. Intermediates in aerobic carbon disulfide metabolism were shown by GC and GC/MS to include carbonyl sulfide and hydrogen sulfide, but anaerobic production of COS and H2S from carbon disulfide did not occur. SDS-PAGE of cell-free extracts showed polypeptides that were unique to growth on carbon disulfide, common to carbon disulfide and carbonyl sulfide, or found after growth on carbon disulfide, carbonyl sulfide or thiosulfate. The possible identity of these as proteins involved in sulfur compound metabolism is discussed.
引用
收藏
页码:225 / 236
页数:12
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