title: Association-induced folding of globular proteins.
abstract: It has generally been assumed that the aggregation of partially folded intermediates during protein refolding results in the termination of further protein folding. We show here, however, that under some conditions the association of partially folded intermediates can induce additional structure leading to soluble aggregates with many native-like properties. The amount of secondary structure in a monomeric, partially folded intermediate of staphylococcal nuclease was found to double on formation of soluble aggregates at high protein or salt concentrations. In addition, more globularity, as determined from Kratky plots of small-angle x-ray scattering data, was also noted in the associated states.
authors.affiliation: Department of Chemistry and Biochemistry, University of California, Santa Cruz, CA 95064, USA. uversky@sun.ipr.serpukhov.su
authors.forename: V N
authors.initials: VN
authors.lastname: Uversky
authors.forename: D J
authors.initials: DJ
authors.lastname: Segel
authors.forename: S
authors.initials: S
authors.lastname: Doniach
authors.forename: A L
authors.initials: AL
authors.lastname: Fink
mesh_terms: D002942:Circular Dichroism; D018360:Crystallography, X-Ray; D008836:Micrococcal Nuclease / Q000737:chemistry*; D011487:Protein Conformation; D017510:Protein Folding; D017433:Protein Structure, Secondary
chemical_list: D008836:Micrococcal Nuclease