Premium
Genetic and biochemical analysis of in vivo protein folding and subunit assembly
Author(s) -
Goldenberg David P.,
Smith Donna H.,
King Jonathan
Publication year - 1983
Publication title -
biopolymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.556
H-Index - 125
eISSN - 1097-0282
pISSN - 0006-3525
DOI - 10.1002/bip.360220120
Subject(s) - trimer , chemistry , protein subunit , folding (dsp implementation) , protein folding , native state , biophysics , biochemistry , dimer , stereochemistry , gene , biology , organic chemistry , electrical engineering , engineering
The in vivo pathway of folding and subunit assembly of a trimeric bacteriophage protein has been studied by characterizing precursors to the native protein and by analyzing temperature‐sensitive mutations that kinetically block the pathway. The native trimer is formed via an intermediate composed of three partially folded chains, the protrimer. At 39°C, temperature‐sensitive mutations prevent the formation of both the native trimer and the protrimer, possibly by destabilizing earlier intermediates. However, the mutations do not affect the stability of the native protein, formed at 30°C. Thus, these mutations identify amino acid residues involved in interactions that determine the folding pathway.