The present invention refers to a recombinant nucleotide sequence which codes upon expression for at least a part of a hybrid β-lactamase class A protein, wherein in that the β-lactamase class A protein is bearing at least one heterologous sequence in a region located between two neighboring alpha helices of the β-lactamase sequence, wherein the region is selected from:
a) the region forming a juncture between alpha helix 8 and alpha helix 9 of the TEM-1 β-lactamase;
b) the region forming a juncture between the alpha helices of homologous β-lactamases class A, which correspond to the alpha helix 8 and alpha helix 9 of the TEM-1 β-lactamase.
本发明是指一种
重组核苷酸序列,它在表达时编码至少一部分杂交β-内酰胺酶A类蛋白质,其中β-内酰胺酶A类蛋白质在位于β-内酰胺酶序列的两个相邻α螺旋之间的区域中含有至少一个异源序列,其中该区域选自:
a) 在
TEM-1 β-内酰胺酶的α螺旋 8 和α螺旋 9 之间形成连接的区域;
b) 与
TEM-1 β-内酰胺酶的α螺旋 8 和α螺旋 9 相对应的同源 β-内酰胺酶 A 类的α螺旋之间的连接区域。