Modified microorganism with improved biomass separation behaviour

A modified microorganism having, compared to its wild-type, a deletion of the wcaJ-gene or an introduction of at least one mutation into the wcaJ-gene that leads to the expression of a truncated enzyme encoded by the wcaJ-gene in which at least 100 amino acids of the wild-type enzyme encoded by the wcaJ-gene are deleted from the C-terminal end;

• wherein the wild-type from which the modified microorganism has been derived belongs to the family of Pasteurellaceae and wherein the wild-type refers to the naturally occurring microorganism that has not been genetically modified,
• wherein the wcaJ-gene in the wildtype comprises a nucleic acid
• encoding an amino acid sequence which is at least 95% identical to SEQ ID NO:
• 4 over the total length of the amino acid sequence of SEQ ID NO:
• 4.