| 摘要 |
Isolated polynucleotide (I) from coryneform bacteria comprises a sequence at least 70% identical to the sequence that encodes a fully defined 610 amino acid protein (II) sequence (S2) given in the specification, sequences in plasmids pEK-pckA and pEK-pckB, a sequence encoding a polypeptide at least 70% identical to (II), their complements or a sequence of at least 15 consecutive bases from (I). Isolated polynucleotide (I) from coryneform bacteria comprises: (a) a sequence at least 70% identical to a sequence that encodes the fully defined 610 amino acid sequence (S2) given in the specification; (b) a sequence at least 70% identical to a sequence that encodes (S2) and is present in plasmids pEK-pckA and pEK -pckB; (c) a sequence encoding a polypeptide with an amino acid sequence at least 70% identical to (S2); (d) the complements of (a), (b) or (c); (e) a sequence of at least 15 consecutive bases from (a), (b), (c) or (d) Independent claims are also included for the following: (1) vectors (III) pEK-pckA and pEK-pckB (2) vector (IV) pK19mobsacB DELTA pck (deposited in Escherichia coli DH5 alpha as DSM 13047); corynebacteria comprising (III) or (IV) or including a DELTA pck deletion; and (3) fermentative production (P) of L-amino acids using a bacterium in which either (I) is downregulated or the activity of its encoded protein is reduced. |
