TECHNOLOGY FOCUS - BIOTECHNOLOGY - Preparation (Claimed): The method for producing C.glutamicum microorganism, involves converting suitable substrate or metabolic intermediate to isobutanol having at least 4 g/l and transforming microorganism with one or more recombinant polynucleotides encoding polypeptides containing keto-acid decarboxylase. Preferred Microorganism: The biosynthetic pathway for production of an amino acid in the organism is modified for production of alcohol. The microorganism comprises improved tolerance to isobutanol, when compared to recombinant E.coli. The recombinant microorganism comprises elevated expression or activity of a 2-keto-acid decarboxylase and alcohol dehydrogenase, as compared to parental microorganism. Preferred Components: The 2-keto-acid decarboxylase is chosen from pyruvate dehydrogenase complex (PDC), pcl, pdc5, pc6, Aro10, thiamine biosynthesis (thi3), kivd, and kdcA, homology or variant of the above-mentioned compounds, and a polypeptide exhibiting at least 60% homology to any one of the above-mentioned components and having 2-keto-acid decarboxylase activity. The 2-keto-acid decarboxylase is encoded by polynucleotide exhibiting at least 60% homology to a nucleic acid pdc, pdcl, pdc5, pdc6, aro10, thi3, kivd, kdcA, a homolog or variant of any of the above-mentioned components, or its fragment, where the polynucleotide encodes polypeptide having 2-keto acid decarboxylase activity. The 2-keto-acid decarboxylase is encoded by polynucleotide derived from kivd gene, or its homolog. The alcohol dehydrogenase (adh) is chosen from adhA, adhl, adh2, adh3, adh4, adh5, adh6, sfal, homolog or variant of any of the above-mentioned components, and polypeptide exhibiting at least 60% homology to any one of the above-mentioned components and having alcohol dehydrogenase activity. The alcohol dehydrogenase is encoded by a polynucleotide exhibiting at least 60% homology to a nucleic acid chosen from adhA, adhl, adh2, adh3, adh4, adh5, adh6, sfal gene, and a homolog of any of the foregoing and where the polynucleotide encodes a protein having 2-alcohol dehydrogenase activity. The recombinant microorganism comprises one or more gene deletions chosen from adhE, IdhA, ppc, pyc, homologs of any of the above-mentioned components and naturally occurring variants of any of the above-mentioned components. The genotype is chosen from deletion or knockout chosen from aadhE, aldhA, appc, apyc and any combination and comprising an expression or increased expression of kivd, ilvC and ilvD, where the microorganism produces isobutanol. Preferred Components: The substrate or metabolic intermediate comprises 2-keto acid. The substrate comprises glucose. The alcohol comprises isobutanol. EXAMPLE - No suitable example given.