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Title: In vitro maturation of NiSOD reveals a role for cytoplasmic histidine in processing and metalation

Journal Article · · Metallomics (Online)
 [1];  [2]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [1]
  1. University of Massachusetts, Amherst, MA (United States)
  2. Brookhaven National Laboratory (BNL), Upton, NY (United States)
  3. Durham University (United Kingdom)
  4. Brookhaven National Laboratory (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)

The importance of cellular low molecular weight (LMW) ligands in metalloenzyme maturation is largely unexplored. Maturation of NiSOD requires post-translational N-terminal processing of the proenzyme, SodN, by its cognate protease, SodX. Here we provide evidence for the participation of L-histidine in the protease-dependent maturation of Nickel-dependent Superoxide Dismutase (NiSOD) from Streptomyces coelicolor. Furthermore, in vitro studies using purified proteins cloned from S. coelicolor and overexpressed in E. coli support a model where a ternary complex formed between the substrate (SodN), the protease (SodX) and L-Histidine creates a novel Ni-binding site that is capable of the N-terminal processing of SodN and specifically incorporates Ni into the apo-NiSOD product. Thus, L-Histidine serves many of the functions associated with a metallochaperone or, conversely, eliminates the need for a metallochaperone in NiSOD maturation.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division (CSGB); USDOE Office of Science (SC), Biological and Environmental Research (BER). Biological Systems Science (BSS); National Institutes of Health (NIH)
Grant/Contract Number:
SC0012704; R01-GM069696
OSTI ID:
2007526
Report Number(s):
BNL-224865-2023-JAAM
Journal Information:
Metallomics (Online), Vol. 15, Issue 11; ISSN 1756-591X
Publisher:
Oxford University PressCopyright Statement
Country of Publication:
United States
Language:
English

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