Polypeptide realizing specific combination with mycoplasma pneumoniae positive serum and diagnostic kit

The invention provides a polypeptide realizing specific combination with mycoplasma pneumoniae positive serum. The amino acid sequence of the polypeptide is shown as SEQ ID NO: 1: L-P-Q-R-L-R-T. The invention also provides a mycoplasma pneumoniae infected serology diagnostic kit. The kit contains polypeptide realizing specific combination with mycoplasma pneumoniae positive serum. In addition, theinvention also provides a mycoplasma pneumoniae diagnostic kit for showing the polypeptide on the basis of polypeptide. The kit contains a core phage, wherein the core phage is a phage showing the polypeptide. The polypeptide and the corresponding core phage provided by the invention have the advantages that the sensitivity and the specificity degree are very high; good clinic diagnosis values are realized. 本发明提供了种能够与肺炎支原体阳性血清特异结合的多肽，所述的多肽的氨基酸序列如SEQ ID NO：1所示：L-P-Q-R-L-R-T。本发明还提供了种肺炎支原体感染血清学诊断试剂盒，所述试剂盒中含有上述与肺炎支原体阳性血清特异结合的多肽。另外，本发明还提供了种基于噬菌体展示多肽的肺炎支原体诊断试剂盒，该试剂盒中包含有核心噬菌体，其中核心噬菌体为展示上述多肽的噬菌体。本发明所提供的多肽和其相应的核心噬菌体的灵敏度和特异度高，