title: Recombinant human alphaA-crystallin can protect the enzymatic activity of CpUDG against thermal inactivation.
abstract: alpha-Crystallin is one of the major protein components in mammalian lens fiber cells. It is composed of alphaA and alphaB subunits that have structural homology to the family of mammalian small heat shock proteins. Horwitz firstly characterized native alpha-crystallin as a molecular chaperone in vitro based on its ability to prevent heat-induced aggregation of lens proteins and enzymes. Andley et al. cloned and expressed human alphaA-crystallin in Escherichia coli and confirmed its chaperone activity by suppression of thermal aggregation and singlet oxygen-induced opacification. Although alphaA-crystallin acts as a chaperone protein, there is no report showing on its ability to protect enzymes against thermal inactivation. Here, we present data showing that alphaA-crystallin can prevent thermal inactivation of CpUDG that catalyzes uracil removal from DNAs.
authors.affiliation: College of Life Sciences & Technology, Shanghai Jiaotong University, China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Zhang
authors.forename: Xipeng
authors.initials: X
authors.lastname: Liu
authors.forename: Jianhua
authors.initials: J
authors.lastname: Liu
mesh_terms: D001483:Base Sequence; D002384:Catalysis; D016993:Chlamydophila pneumoniae / Q000201:enzymology*; D003001:Cloning, Molecular; D003459:Crystallins / Q000737:chemistry / Q000378:metabolism*; D045647:DNA Glycosylases / Q000378:metabolism*; D017931:DNA Primers; D006801:Humans; D011489:Protein Denaturation; D011994:Recombinant Proteins / Q000737:chemistry / Q000378:metabolism; D051981:Uracil-DNA Glycosidase
chemical_list: D003459:Crystallins; D017931:DNA Primers; D011994:Recombinant Proteins; D045647:DNA Glycosylases; D051981:Uracil-DNA Glycosidase