The present disclosure relates, in some aspects, to cell-free methods and systems for large-scale conversion of methane to isobutanol, comprising combining, in a bioreactor at elevated pressure, methane, oxygen, and cell lysates containing methane monooxygenase, methanol dehydrogenase, and enzymes that catalyze the conversion of formaldehyde to isobutanol, to form a cell-free reaction mixture, and incubating under suitable conditions the cell-free reaction to convert methane to isobutanol.

The present disclosure relates, in some aspects, to cell-free methods and systems for large-scale conversion of methane to isobutanol, comprising combining, in a bioreactor at elevated pressure, methane, oxygen, and cell lysates containing methane monooxygenase, methanol dehydrogenase, and enzymes that catalyze the conversion of formaldehyde to isobutanol, to form a cell-free reaction mixture, and incubating under suitable conditions the cell-free reaction to convert methane to isobutanol.

Methylobacterium strains that enhance early growth of plants, improve propagation/transplant vigor, increase nutrient uptake, improve stand establishment, improve stress tolerance and/or increase a plant's ability to utilize nutrients are provided herein. Also provided are methods to reduce green-house gas emission and convert methane to methanole with Methylobacterium strains.

Provided herein are non-naturally occurring microbial organisms comprising a methane-oxidizing metabolic pathway. The invention additionally comprises non-naturally occurring microbial organisms comprising pathways for the production of chemicals. The invention additionally provides methods for using said organisms for the production of chemicals.

Improved soluble methane monooxygenases and soluble methane monooxygenase systems are provided.

Provided are synthetic organisms and methods for the conversion of ethane and related substrates into 3-hydroxypropionate and related products.

The present invention relates to novel enzyme nanoparticles capable of converting methane into methanol, in which key active sites of methane-oxidizing bacteria are fused with each other and expressed on a protein that can be self-assembled in cells to form nanoparticles, and specifically to enzyme nanoparticles including a protein having methane monooxygenase (MMO) activity and active sites of the methane oxidase, a method for production thereof, a recombinant microorganism into which a nucleic acid encoding the protein and the active site of the methane oxidase is introduced, and immobilized enzyme nanoparticles including the enzyme nanoparticles loaded on a carrier.

Methods and compositions for the oxidation of short alkanes by engineered microorganisms expressing enzymes are described, along with methods of use.

Methanotroph strains that enhance early growth of plants, improve propagation/transplant vigor, increase nutrient uptake, improve stand establishment, improve stress tolerance and/or increase a plant's ability to utilize nutrients are provided herein. Uses of compostions comprising such strains and optionally methylotroph strains, for methane mitigation and crop improvement is provided. Also provided are methods to reduce green-house gas emission and convert methane to methanol with methanotroph strains.