Abstract: Provided is a recombinant cell that produces isoprene or terpene, wherein the recombinant cell includes an ability to synthesize isopentenyl diphosphate through a mevalonate pathway (MVA pathway), wherein the recombinant cell lacks an ability to synthesize isopentenyl diphosphate through an endogenous non-mevalonate pathway (MEP pathway), wherein the recombinant cell includes an isoprene synthase gene or a terpene synthase gene as a foreign gene, and wherein the recombinant cell produces, with the expression of the foreign gene, isoprene or terpene having 10, 15, 20, 30, or 40 carbon atoms. The mevalonate pathway is preferably an exogenous mevalonate pathway.

Abstract: Provided is a recombinant cell that produces isoprene or terpene, wherein the recombinant cell includes an ability to synthesize isopentenyl diphosphate through a mevalonate pathway (MVA pathway), wherein the recombinant cell lacks an ability to synthesize isopentenyl diphosphate through an endogenous non-mevalonate pathway (MEP pathway), wherein the recombinant cell includes an isoprene synthase gene or a terpene synthase gene as a foreign gene, and wherein the recombinant cell produces, with the expression of the foreign gene, isoprene or terpene having 10, 15, 20, 30, or 40 carbon atoms. The mevalonate pathway is preferably an exogenous mevalonate pathway.

Abstract: To provide a recombinant cell being an anaerobic archaeon, including a gene encoding isoprene synthase, a gene encoding monoterpene synthase, a gene encoding sesquiterpene synthase, a gene encoding diterpene synthase, a gene encoding squalene synthase, or a gene encoding phytoene synthase as a first foreign gene, wherein the first foreign gene is expressed, and the recombinant cell is capable of producing isoprene or terpene having 10, 15, 20, 30, or 40 carbon atoms.

Abstract: Provided is a modified obligately anaerobic acetogen in which activity of at least one enzyme selected from the group consisting of a restriction enzyme, a modification enzyme, and a recognition enzyme constituting a type I restriction modification system enzyme is deleted or suppressed. Preferably, the activity of at least the restriction enzyme is deleted or suppressed. The obligately anaerobic acetogen is preferably a Clostridium bacterium or a Moorella bacterium, and particularly preferably Clostridium ljungdahlii.