PUBLICATION

Recombinant expression and purification of the RNA-binding LARP6 proteins from fish genetic model organisms

Authors
Castro, J.M., Horn, D.A., Lewis, K.A.
ID
ZDB-PUB-170413-3
Date
2017
Source
Protein Expression and Purification   134: 147-153 (Journal)
Registered Authors
Keywords
Bacterial expression, La-related protein, Protein solubility, RNA binding protein
MeSH Terms
  • Animals
  • Cyprinodontiformes/genetics*
  • Cyprinodontiformes/metabolism
  • Gene Expression*
  • Humans
  • Protein Domains
  • RNA-Binding Proteins*/biosynthesis
  • RNA-Binding Proteins*/chemistry
  • RNA-Binding Proteins*/genetics
  • RNA-Binding Proteins*/isolation & purification
  • Recombinant Proteins/biosynthesis
  • Recombinant Proteins/chemistry
  • Recombinant Proteins/genetics
  • Recombinant Proteins/isolation & purification
  • Zebrafish/genetics*
  • Zebrafish/metabolism
  • Zebrafish Proteins*/biosynthesis
  • Zebrafish Proteins*/chemistry
  • Zebrafish Proteins*/genetics
  • Zebrafish Proteins*/isolation & purification
PubMed
28400296 Full text @ Protein Expr. Purif.
Abstract
The RNA-binding proteins that comprise the La-related protein (LARP) superfamily have been implicated in a wide range of cellular functions, from tRNA maturation to regulation of protein synthesis. To more expansively characterize the biological function of the LARP6 subfamily, we have recombinantly expressed the full-length LARP6 proteins from two teleost fish, platyfish (Xiphophorus maculatus) and zebrafish (Danio rerio). The yields of the recombinant proteins were enhanced to >2 mg/L using a tandem approach of an N-terminal His6-SUMO tag and an iterative solubility screening assay to identify structurally stabilizing buffer components. The domain topologies of the purified fish proteins were probed with limited proteolysis. The fish proteins contain an internal, protease-resistant 40 kDa domain, which is considerably more stable than the comparable domain from the human LARP6 protein. The fish proteins are therefore a lucrative model system in which to study both the evolutionary divergence of this family of La-related proteins and the structure and conformational dynamics of the domains that comprise the LARP6 protein.
Genes / Markers
Figures
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Antibodies
Orthology
Engineered Foreign Genes
Mapping