Download MendeleyExpression, purification, and characterization of diacylated Lipo-YcjN from Escherichia coli.
Trevino, M.A., Amankwah, K.A., Fernandez, D., Weston, S.A., Stewart, C.J., Gallardo, J.M., Shahgholi, M., Sharaf, N.G.(2024) J Biological Chem 300: 107853-107853
- PubMed: 39362470 Search on PubMed
- DOI: https://doi.org/10.1016/j.jbc.2024.107853
- Primary Citation Related Structures:
8VQK - PubMed Abstract:
YcjN is a putative substrate binding protein expressed from a cluster of genes involved in carbohydrate import and metabolism in Escherichia coli. Here, we determine the crystal structure of YcjN to a resolution of 1.95 Å, revealing that its three-dimensional structure is similar to substrate binding proteins in subcluster D-I, which includes the well-characterized maltose binding protein (MBP). Furthermore, we found that recombinant overexpression of YcjN results in the formation of a lipidated form of YcjN that is posttranslationally diacylated at cysteine 21. Comparisons of size-exclusion chromatography profiles and dynamic light scattering measurements of lipidated and non-lipidated YcjN proteins suggest that lipidated YcjN aggregates in solution via its lipid moiety. Additionally, bioinformatic analysis indicates that YcjN-like proteins may exist in both Bacteria and Archaea, potentially in both lipidated and non-lipidated forms. Together, our results provide a better understanding of the aggregation properties of recombinantly expressed bacterial lipoproteins in solution and establish a foundation for future studies that aim to elucidate the role of these proteins in bacterial physiology.
- Department of Biology, Stanford University, Stanford CA 94305.
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