The invention provides a non-naturally occurring microorganism comprising
one or more gene disruptions, the one or more gene disruptions occurring
in genes encoding an enzyme obligatory to coupling 1,4-butanediol
production to growth of the microorganism when the gene disruption
reduces an activity of the enzyme, whereby theone or more gene
disruptions confers stable growth-coupled production of 1,4-butanediol
onto the non-naturally occurring microorganism. The microorganism can
further comprise a gene encoding an enzyme in a 1,4-butanediol (BDO)
biosynthetic pathway. The invention additionally relates to methods of
using microorganisms to produce BDO.