Abstract: The present invention relates to the field of genetic engineering, particularly to a fumonisin degrading enzyme FumDPS, gene and application thereof. The present invention provides a fumonisin degrading enzyme FumDPS from Pigmentiphaga sp. which has the amino acid sequence of SEQ ID NO: 1, has the optimum temperature of 37° C., and the optimum pH of 8 to 9, remains more than 60% of the activity in the range of pH 3 to 7, and has 100% of degradation rate of fumonisin B1 at the optimum temperature and pH.

Abstract: Relating to immunotherapy of infectious diseases, in particular to construction and application of a recombinant gene for chimeric antigen receptor (CAR) for treating HIV infection, a single-chain antibody ScFv is capable of recognizing gp120 on the surface of an HIV virus-infected cell, which is obtained by tandemly ligating light chain and heavy chain variable regions of an antibody against gp120 on the surface of the HIV virus-infected cell. The single-chain antibody is made into a chimeric antigen receptor (CAR), the CAR encoding gene is transferred into a plasmid vector, and the lentiviral vector into which the CAR encoding gene is transduced is transduced into CD8+ T lymphocytes. The obtained CAR-T lymphocytes have been found to have significant activity in inhibiting and killing HIV-infected cells in both in vitro and in vivo experiments, which can be used as an active ingredient for preparing a drug against HIV infection.